ISD2532/40/48/64 Produts handbook
Contents
1. Vou Output High Voltage Veco 0 4 lon 10 uA Vout OVF Output High Voltage 2 4 log 1 6 mA VoHo EOM Output High Voltage Vec 1 0 Vec 0 8 log 3 2 MA lee Vec Current Operating 25 30 MA Req lsg Vec Current Standby 1 10 uA Il Input Leakage Current pA lips Input Current HIGH w Pull 130 uA Force Voc 4 Down Reyt Output Load Impedance 16 Q Speaker Load RMC Preamp In Input Resistance 4 9 15 KQ MIC and MIC REF Pads Raux AUX IN input Resistance 5 11 20 KQ RANA IN ANA IN Input Resistance 2 3 3 5 KQ Act Preamp Gain 1 21 24 26 aB AGC 0 0 V Apreo Preamp Gain 2 15 5 aB AGC 2 5 V Voice Solutions in Silicon Symbol Aan AARP Race Parameters Table 10 DC Parameters Die Min2 Typ Max Units 15D2532 40 48 64 Products Conditions ANA IN to SP Gain AGC Output Resistance 1 Typical values T4 25 C and 5 0 V 2 All Min Max limits are guaranteed by ISD via electrical testing or characterization Not all specifications are 100 percent tested 3 Voca and Vecp connected together 4 XCLK pad only 21 2 5 JENNA 9 5 KQ Symbol TREC Jo au Toe Tser THOLD Jop Tror ISD Table 11 AC Parameters Die Characteristic Sampling Frequency Filter Pass Band Record Duration Playback Duration ISD2532 ISD2540 ISD2548 ISD2564 ISD2532 ISD2540 ISD2548 ISD2564 ISD2532 ISD2540 ISD2548 ISD2564 ISD2532 I2. 6 When the recording sequences are finished the final CE pulse LOW will end the last record cycle leaving a set EOM marker at the message end Recording may also be terminated by a HIGH level on PD which will leave a set EOM marker Playback in Push Button Mode 1 The PD pin should be LOW 2 The P R pin is taken HIGH 3 The CE pin is pulsed LOW Playback starts EOM goes HIGH to indicate an operation in progress 4 If the CE pin is pulsed LOW or an EOM mark er is encountered during an operation the part will pause The internal address point ers are not cleared and EOM goes back LOW The P R pin may be changed at this time A subsequent record operation would not reset the address pointers and the recording would begin where playback ended 5 CE is again pulsed LOW Playback starts where it left off with EOM going HIGH to in dicate an operation in progress 6 Playback continues as in steps 4 and 5 uniil PD is pulsed HIGH or overflow occurs 7 If in overflow pulling CE LOW will reset the address pointer and start playback from the beginning After a PD pulse the part is reset to address 0 NOTE Push button Mode can be used in con junction with modes MO M1 and M3 1SD2532 40 48 64 Products GOOD AUDIO DESIGN PRACTICES ISD products are very high quality single chip voice recording and playback systems To ensure the highest quality voice reproduction it is impor tant that good audio d
3. 32 32 Seconds or Commercial Die 0 C to 50 C 40 40 Seconds 48 48 Seconds Package Type 64 64 Seconds Es Ze 28 Lead 8x13 4 mm Plastic Thin Small Outline Package TSOP Type 1 G 28 Lead 0 350 Inch Small Outline Package SOIC P 28 Lead 0 600 Inch Plastic Dual Inline Package PDIP S 28 Lead 0 300 inch Small Outline Integrated Circuit SOIC IS 32 Lead 8x20 mm Plastic Thin Small Outline Package TSOP X Die When ordering ISD2532 40 48 64 products refer to the following part numbers which are supported in volume for this product series Consult the local ISD Sales Representative or Distributors for availability information Part Number Part Number Part Number Part Number ISD2532E ISD2540E ISD2548E ISD2564E ISD2532P ISD2540P ISD2548P ISD2564P ISD2532S ISD2540S ISD2548S ISD2564S ISD2532X ISD2540X ISD2548X 5SD2564X For the latest product information access ISD s worldwide website at http www isd com ISD 29
4. Trps is required during a static condition typically overflow Sampling Frequency and playback Duration can vary as much as 2 25 percent over the commercial temperature range and voltage range For greater stability an external clock can be utilized see Pin Descriptions Filter specification applies to the antialiasing filter and the smoothing filter Therefore from input to output expect a dB drop by nature of passing through both filters NQGA amp so 16 Voice Solutions in Silicon TM 1SD2532 40 48 64 Products TYPICAL PARAMETER VARIATION WITH VOLTAGE AND TEMPERATURE DIE Chart 5 Record Mode Operating Current Chart 7 Standby Current Isp Icc T so T 3 08 e p 25 a z z b z hg Y e 20 5 a e 0 kl 2 Q Pas o4 o 310 o Re 0 2 0 5 0 0 0 25 50 O 25 50 Temperature C Temperature C 6 5Volts 5 5Vols AS Volts RANGE SROs TEOR Chart6 Total Harmonic Distortion Chart8 Oscillator Stability 0 2 0 7 0 m 0 zos ZE Ss 0 5 e Bore 5 2 2 0 4 D 0 4 eee 2 Oe ge 9 a S 0 2 he 0 1 1 0 E 0 25 50 0 25 50 Temperature C Temperature C 6 5 Volts e 5 5Volts 4 5 Volts OOO SO Se Nols ISD 17 15D2532 40 48 64 Products Figure 4 ISD2500 Application Example Design Schematic Vec ISD2532 40 48 64 1 28 Vee ww C6 C7 C8 En 0 1 u
5. and another CE pulse will cause the device to continue the operation from the place where it was paused PD PIN STOP RESET In push button Operational Mode PD acts as a HIGH going pulse activated STOP RESET signal When a playback or record cycle is in progress and a HIGH going pulse is observed on PD the current cycle is terminated and the address point er is reset to address 0 the beginning of the mes sage space EOM PIN RUN In Push Button Operational Mode EOM becomes an active HIGH RUN signal which can be used to drive an LED or other external device It is HIGH whenever a record or playback operation is in progress Recording in Push Button Mode 1 The PD pin should be LOW usually using a pull down resistor 2 The P R pin is taken LOW 3 The CE pin is pulsed LOW Recording starts EOM goes HIGH to indicate an operation in progress 4 The CE pin is pulsed LOW Recording paus es EOM goes back LOW The internal ad dress pointers are not cleared but an EOM marker is stored in memory to point to the message end The P R pin may be taken HIGH at this time Any subsequent CE would start a playback at address 0 ISD 15D2532 40 48 64 Products 5 The CE pin is pulsed LOW Recording starts at the next address after the previous set EOM marker EOM goes back HIGH NOTE if the MI Operational Mode pin is also HIGH the just previously written EOM bit is erased and recording starts at that address
6. 1SD2532 40 48 64 Products Pin Pad Designation with Respect to Die Center um AO Al A2 AS A4 AS A6 NC A7 A8 AUX IN VssD Vsga SP SP Veca MIC MIC REF AGC ANA IN ANA OUT OVF CE PD 28 Pin Pin Name Address O Address 1 Address 2 Address 3 Address 4 Address 5 Address 6 No Connect Address 7 Address 8 Auxiliary Input Vss Digital Power Supply Vss Analog Power Supply Speaker Output Speaker Output Vec Analog Power Supply Microphone Input Microphone Reference Automatic Gain Control Analog Input Analog Output Overflow Output Chip Enable Inout Power Down Input End of Message No Connect optional Playback Record Vcc Digital Power Supply X Axis 896 55 1114 05 1329 68 1542 68 1639 05 1696 80 1696 80 1729 80 1729 80 1729 80 1408 80 1111 43 406 43 46 05 388 20 747 83 1102 58 1296 08 1667 70 1729 95 1702 20 1675 95 1728 08 1731 83 1342 20 987 83 808 58 546 08 Y Axis 2425 13 2425 13 2425 13 2425 13 2178 75 1960 88 1731 38 1875 75 2061 00 2343 38 2408 25 2388 75 2431 13 2360 25 2360 25 2403 00 2438 63 2438 63 2422 88 1946 63 1703 63 1779 38 2114 25 2383 88 2411 63 2450 63 2453 25 2449 13 Voice Solutions in Silicon 15D2532 40 48 64 Products ORDERING INFORMATION Product Number Descriptor Key ISD25_ 2500 Series Special Temperature Field Duration Blank Commercial Packaged 0 C to 70 C
7. 64 Products FEATURES Easy to use single chip voice record playback solution High quality natural voice audio reproduction Manual switch or microcontroller compatible Playback can be edge or level activated Single chip durations of 32 40 48 64 seconds Directly cascadable for longer durations Automatic power down push button mode Standby current 1 uA typical Zero power message storage Eliminates battery backup circuits Fully addressable to handle multiple messages 100 year message retention typical 100 000 record cycles typical On chip clock source Programmer support for play only applications Single 5 volt power supply Available in die form DIP and TSOP packaging Table i 1SD2532 40 48 64 Product Summary Part Duration Input Sample Typical Filter Pass Band Number Seconds Rate KHz KHz ISD2532 32 8 0 3 4 ISD2540 40 6 4 2 7 ISD2548 48 5 3 2 3 ISD2564 64 4 0 1 7 Voice Solutions in Silicon 1SD2532 40 48 64 Products DETAILED DESCRIPTION SPEECH SOUND QUALITY The ISD2500 series includes devices offered at 4 0 5 3 6 4 and 8 0 KHz sampling frequencies allow ing the user a choice of speech quality options Increasing the duration within a product series de creases the sampling frequency and bandwidth which affects sound quality Please refer to the ISD2532 40 48 64 Summary table on page ji to compare filter pass band and product durations The speech s
8. 7 59 0 29 0 48 10 41 1 02 25 15D2532 40 48 64 Products Figure 12 32 Lead 8x20mm Plastic Thin Small Outline Package TSOP Type I T 1 2 3 4 5 6 7 8 9 Table 20 Plastic Thin Small Outline Package TSOP Type I T Dimensions INCHES MILLIMETERS Min Nom Max Min Max A 0 780 0 787 0 795 19 80 20 00 20 20 B 0 720 0 724 0 728 18 30 18 40 18 50 e 0 311 0 315 0 319 7 90 8 00 8 10 D 0 002 0 006 0 05 0 15 E 0 006 0 009 0 011 0 17 0 22 0 27 F 0 0197 0 50 G 0 037 0 039 0 041 0 95 1 00 1 05 H 0 3 5 0 oF 5 l 0 020 0 024 0 028 0 50 0 60 0 70 J 0 004 0 008 0 10 0 21 NOTE Lead coplanarity to be within 0 002 inches 26 Voice Solutions in Silicon 1SD2532 40 48 64 Products Figure 13 ISD2532 40 48 64 Products Bonding Physical Layout Unpackaged Die A3 Al Vega XCLK a AO i S PD ISD2532 40 48 64 Tee ge Ze l Ad Jm I Die Dimensions CE X 149 6 1 mils ASE Y 206 3 1 mils Weg OVF Il Die Thickness 2 11 8 4 mils ISD2532 40 48 64 Ill Pad Opening 111 microns 4 4 mils VC Je ANA OUT a Y i i ANA IN E O GER AUX IN Vsa SP MIC AGC Vso SP Veca MIC REF 1 The backside of die is internally connected to Vss It MUST NOT be connected to any other potential or damage may occur 2 Die thickness is subject to change please contact ISD factory for status and availability ISD 27 15D2532 40 48 64 Products Table 21
9. America TT ChipCorder TECHNOLOGY BY ISD 1ISD2532 40 48 64 Products Single Chip Voice Record Playback Devices 32 40 48 and 64 Second Durations GENERAL DESCRIPTION Information Storage Devices ISD2500 Chip Corder Series provides high quality single chip Record Playback solutions for 32 to 64 second messaging applications The CMOS devices in clude an on chip oscillator microphone pream plifier automatic gain control antialiasing filter smoothing filter soeaker amplifier and high den sity multi level storage array In addition the ISD2500 is microcontroller compatible allowing complex messaging and addressing to be achieved Recordings are stored in on chip nonvolatile memory cells providing zero power message storage This unique single chip solution is made possible through ISD s patented multilevel storage technology Voice and audio signals are stored directly into memory in their natural form providing high quality solid state voice reproduction Figure i 1SD2532 40 48 64 Device Block Diagram Internal Clock XCLK ANA IN 5 Pole Active Antialiasing Filter ANA OUT MIC 2 o Q QO Q a MIC REF Automatic AGC Gain Control AGC Veca Vesa Vssp Veco ISD APRIL 1998 Sampling Clock Analog Transceivers AO Al A2 A3 A4 AS A6 A7 AB ChipCorder TECHNOLOGY BY ISD 256K Cell Nonvolatile Multilevel Storage PD OVF P R CE EOM AUXIN ISD2532 40 48
10. Sa BA ee a a 13 Record Mode Operating Current lag us Pewee Poe ee PANS ee Ve Sows 17 Total HOnmonic DISIOMION seiras wos ae pei Vk eg pe REE eg es OE Vl eae ee aes 17 Standby EE EE 17 Oscillator Stability 17 Ex temal Clock Sample RATES sete ste au Ee dd BR ad Rae BRE Re Re 4 Operational MODES Asearse AA he Mee A ae A A AL AA 5 Alternate Functionality in PINS 0 0 eee eee eens 6 Absolute Maximum Ratings Packaged Parts eee ees 10 Operating Conditions Packaged Parts ieee ed 10 DC Parameters Packaged Parts oo ooo 10 AC Parameters Packaged Parts 6 treet eens 1 Absolute Maximum Ratings Del 14 Operating Conditions Die ieres dada Reo ete ck ad da 14 DC Parameters Die NEEN mS Wis cd iad Aces 14 AE Parameters Die as bat EE teeth ee BREE E 15 Application Example Basic Device Control aoaaa aaa eas 18 Application Example Passive Component Functions 0 eee 19 Application Example Push Button Control eee 21 Application Example Passive Component Functions 21 Push Button Parameters 21 Plastic Thin Small Outline Package TSOP Type E Dimensions 23 Plastic Dual Inline Package PDIP P Dimensions 24 Plastic Small Outline Integrated Circuit SOIC S Dimensions 25 Plastic Thin Small Outline Package TSOP Type T Dimensions 26 ISD2532 40 48 64 Products Pin Pad Designation with Respect to Die Center um 28 Pr TN ASUMA Winbond mee Electronics Corporation
11. The CE and PD pins become redefined as edge activated push but tons A pulse on CE initiates a cycle and if trig gered again pauses the current cycle without resetting the address pointer i e a Start or Pause function PD stops any current cycle and resets the address pointer to the beginning of the mes sage space i e a Stop and Reset function Ad ditionally the EOM pin functions as an active HIGH run indicator and can be used to drive an LED indicating a record or playback operation is in progress Devices in the Push Button Mode cannot be cascaded LOOPING MODE The ISD2500 series can loop with a message that completely fills the memory space NOTE Additional descriptions of ISD2500 device functionality and application examples are provided in the ISD Application Information in this book Voice Solutions in Silicon TIMING DIAGRAMS Figure 2 Record Don t Care AO A8 Don t Care Don t Care AO A8 Don t Care ISD 1SD2532 40 48 64 Products Don t Care Toon Don t Care Don t Care Don t Care ISD2532 40 48 64 Products Table 4 Absolute Maximum Ratings Packaged Parts Condition Value Table 5 Operating Conditions Packaged Parts Condition Value Junction temperature 150 C Storage temperature range 65 C to 150 C Voltage applied to any pin Vss 0 3 V to Ves 0 3 V Vol
12. for the current record or play back cycle The address pins are inputs only and do not output internal address information as the operation progresses Address inputs are latched by the falling edge of CE If both MSBs are HIGH the Address Mode Inputs are interpreted as Mode bits according to the Op erational Mode table on page 5 There are six op erational modes IM M i available as indicated in the table It is possible to use multiple operational modes simultaneously Operational Modes are sampled on each falling edge of CE and thus Operational Modes and direct address ing are mutually exclusive 15D2532 40 48 64 Products OPERATIONAL MODES The ISD2500 series is designed with several built in Operational Modes that provide maximum func tionality with minimum additional components These are described in detail below The Opera tional Modes use the address pins on the ISD2500 devices but are mapped outside the valid ad dress range When the two Most Significant Bits MSB are HIGH A7 and A8 the remaining ad dress signals are interpreted as mode bits and not as address bits Therefore Operational Modes and direct addressing are not compatible and cannot be used simultaneously There are two important considerations for using Operational Modes First all operations begin initially at address 0 which is the beginning of the ISD2500 address space Later operations can be gin at other address locations depending on th
13. from memory The speaker outputs are held at Vssa levels during record and power down It is therefore not possi ble to parallel speaker outputs of multiple ISD2500 devices or the outputs of other speaker drivers NOTE Connection of speaker outputs in parallel may cause damage to the device A single output may be used alone including a coupling capacitor between the SP pin and the speaker These outputs may be used individually with the output signal taken from either pin Using the differential outputs results in a 4 to 1 improve ment in output power NOTE Never ground or drive an unused speaker output AUXILIARY INPUT AUX IN The Auxiliary Input is multiplexed through to the output amplifier and speaker output pins when CE is HIGH P R is HIGH and playback is currently not active or if the device is in playback overflow When cascading multiple ISD2500 devices the AUX IN pin is used to connect a playback signal from a following device to the previous output speaker drivers For noise considerations it is sug gested that the auxiliary input not be driven when the storage array is active Voice Solutions in Silicon ADDRESS MODE INPUTS AX MX The Address Mode Inputs have two functions de pending on the level of the two Most Significant Bits MSB of the address A7 and A8 If either or both of the two MSBs are LOW the inputs are all interpreted as address bits and are used as the start address
14. 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Chart 1 Chart 2 Chart 3 Chart 4 Chart 5 Chart 6 Chart 7 Chart 8 Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Table 15 Table 16 Table 17 Table 18 Table 19 Table 20 Table 21 ISD2532 40 48 64 Device PINOUIS ow ees 2 RECOM et foes SaaS RR EE EES EE 9 ls EE 9 ISD2500 Application Example Design Schematic wo ee 18 ISD2532 40 48 64 Application Example Microcontroller ISD2500 Interface 20 ISD2532 40 48 64 Application Example Push BU ON oi ee 20 Push Button Mode RECOM naaa a ees 22 Push Button Mode Playback earn hie Rael ee ae We a re a We Boe Gea 22 28 Lead 8x13 4mm Plastic Thin Small Outline Package TSOP Type E 23 28 Lead 0 600 Inch Plastic Dual Inline Package PDIP P ooo occ o 24 28 Lead 0 300 Inch Plastic Small Outline Integrated Circuit SOIC S 25 32 Lead 8x20mm Plastic Thin Small Outline Package TSOP Type I T 26 5D2532 40 48 64 Products Bonding Physical Layout Unpackaged Die 27 Record Mode Operating Current lee ra iii 13 Total Hormionic Distortion 2 EE e a a bie ek Agee a E 13 Standby C rrent lepeti eirati aie Kook a atk ate Rae Ge Wane A RE Md Bk Bi YS 13 OSCIIGIONSIOBINNY eis ee ee al as Sa a
15. 4 Oper ational Mode M1 DELETE EOM MARKERS The M1 Operational Mode allows sequentially re corded messages to be combined into a single message with only one EOM marker set at the end of the final message When this Operational Mode is configured messages recorded sequentially are played back as one continuous message M2 UNUSED When Operational Modes are selected the M2 pin should be LOW M3 MESSAGE LOOPING The M3 Operational Mode allows for the automat ic continuously repeated playback of the mes sage located at the beginning of the address space A message can completely fill the ISD2500 device and will loop from beginning to end without OVF going LOW M4 CONSECUTIVE ADDRESSING During normal operations the address pointer will reset when a message is played through to an EOM marker The M4 Operational Mode inhibits the address pointer reset on EOM allowing mes sages to be played back consecutively M5 CE LEVEL ACTIVATED The default mode for ISD2500 devices is for CE to be edge activated on playback and level activat ed on record The M5 Operational Mode causes the CE pin to be interpreted as level activated as opposed to edge activated during playback This is specifically useful for terminating playback op erations using the CE signal In this mode CE LOW begins a playback cycle at the beginning of the device memory The play back cycle continues as long as CE is held LOW When CE
16. Button Operational Mode described later in the Operational Mode section CHIP ENABLE INPUT CE The CE pin is taken LOW to enable all playback and record operations The address inouts and playback record input P R are latched by the fall ing edge of CE CE has additional functionality in the M Push Button Operational Mode de scribed later in the Operational Mode section Voice Solutions in Silicon PLAYBACK RECORD INPUT P R The P R input is latched by the falling edge of the CE pin A HIGH level selects a playback cycle while a LOW level selects a record cycle For a record cycle the address inputs provide the start ing address and recording continues until PD or CE is pulled HIGH or an overflow is detected i e the chip is full When a record cycle is terminated by pulling PD or CE HIGH an End Of Message EOM marker is stored at the current address in memory For a playback cycle the address inputs provide the starting address and the device will play until an EOM marker is encountered The de vice can continue past an EOM marker in an Op erational Mode or if CE is held LOW in address mode See page 5 for more Operational Modes END OF MESSAGE RUN OUTPUT EOM A nonvolatile marker is automatically inserted at the end of each recorded message It remains there until the message is recorded over The EOM output pulses LOW for a period of Teom at the end of each message In addition the ISD2500 series
17. F 7 0 1 uF 22 uF 2 WEL i CHIP ENABLE 60 ka E BE o 4 z fs POWER DOWN i Pa O o 56 SPEAKER S R C m o 5 1 KQ 0 1 uF PLAYBACK RECORD 24 Om 27 18 Note 5 25 17 22 Vcc R2 ELECTRET 470 KQ 4 7 uF c4 MICROPHONE R5 TL 220 uF 10 KQ NOTE If desired pin 18 PDIP package may be left unconnected microphone preamplifier noise will be higher In this case pin 18 must not be tied to any other signal or voltage Additional design example schematics are provided in Chapter 5 Application Information Table 12 Application Example Basic Device Control Control Step Function Action Power up chip and select Record Playoack Mode 1 PD LOW 2 P R As desired 2 Set addresses AO A8 3A P R HIGH CE Pulsed LOW 3B Begin record P R LOW CE LOW 4A End playback Automatic 4B End record PD or CE HIGH 18 Voice Solutions in Silicon 15D2532 40 48 64 Products Table 13 Application Example Passive Component Functions Part Function Comments R1 Microphone power supply decoupling Reduces power supply noise R2 Release time constant Sets release time for AGC R3 R5 Microphone biasing resistors Provides biasing for microphone operation R4 Series limiting resistor Reduces level to prevent distortion at higher supply voltages R Series limiting resistor Reduces level to high supply voltages C1 C5 Microphone DC blocking capacitor Decouples microphone bias from chip Prov
18. O O 15D253215D254015D254815D2564 O O Table of Contents 1SD2532 40 48 64 Products Single Chip Voice Record Playback Devices 32 40 48 and 64 Second Durations DETAILED DESCRIPTION e erte Ae SE eh En a a a ida 1 pesech sou a QUAY EE EEN EE DUIGMON wns coto CER Tee PARKS FAO Oe OER EAS RRA REESE a eR we BS EEPROM SIOS Ee ra RA DATE RAE EE a ea Microcontroller Interface PIOGIGMIMING ais ee i dae ede tee hi be a oa aai ain eae eee e bya nea es PINIDESCRIPIIONS ng hr dr Ae Re BAS EE Ee GEE Che dee ee bea ed 2 Voltage Inputs Veca Veep 3d a a AAA AAA ORES 2 Ground Inputs Vsga Vsp omnes tied bendy Pde Shes Geese ee pe iaeene eye ey 2 Power Down INPUT PD aeee Aa EE parara ee ai d e A a A doe bo RAE tr Pa eae ae 2 Chip Enable Input CE os cee AE EE GOs bE oR EERE SEAGER SERGE AoE a 2 Playback Record Input P R oe eer eee eee eens 3 End Of Message RUN Output EOM cies dg cia dees caked date tae ee ANE NEE d NEEN eRe 3 Ovetiow CID OVF cor torre radar EE eos eh Se Eee eee ad 3 Microphone Input MIC o 3 Microphone Reference Input MIC REF ooo eee 3 Automatic Gain Control Input AGC aaa 3 Analog Output ANA CH sesa a ee eae ved rc pak nia eia ea k ee Ae Ge en 3 Analog Input ANA IN eee eee eee eee tenets 4 External Clock Input XCLK aaa 4 speaker Outputs bake ii 4 Auxiliary Input AUXIN sees cna at ech ye ea A a a EEN 4 Address Mode Inputs IAM 5 OPERATIONAL MODES sionista ha AON a dd BOD aa Ee e
19. PAUSE A 1 160 m O 20 SPEAKER STOP RESET C3 21 0 1 uF o 18 Note IF PLAYBACK RECORD Vcc Cl 19 i 0 1 pF R2 470 KQ NOTE Please refer to Application Information for more details 20 ELECTRET MICROPHONE 10 KQ ca T 220 nF Voice Solutions in Silicon Conirol Step Part R2 RA R6 R7 C1 C4 C5 C2 C3 Symbol Toe Jor Jop ISD 1SD2532 40 48 64 Products Table 14 Application Example Push Button Control Function Action Select Record Playoack Mode P R As desired P R HIGH CE Pulsed LOW P R LOW CE Pulsed LOW Begin playback Begin record Pause record or playoack CE Pulsed LOW End playback End record PD Pulsed HIGH Table 15 Application Example Passive Component Functions Function Comments Release time constant Sets release time for AGC Series limiting resistor Pull up and pull down resistors Defines static state of inputs Power supply capacitors Filters and bypass of power supply Attack Release time constant Sets attack release time for AGC Low frequency cutoff capacitor Provides additional pole for low frequency cutoff Table 16 Push Button Parameters Characteristic Min ISD2532 ISD2540 ISD2548 ISD2564 PD Pulse Width Stop Resef Power Up Delay CE HIGH Debounce ISD2532 70 105 msec ISD2540 85 135 msec ISD2548 105 160 msec ISD2564 135 215 msec Automatic at EOM marker or PD Pulsed HIGH Conditions Reduces l
20. SD2540 ISD2548 ISD2564 Min 2 CE Pulse Width Control Address Setup Time Control Address Hold Time Power Up Delay PD Pulse Width Record ISD2532 ISD2540 ISD2548 ISD2564 ISD2532 ISD2540 ISD2548 ISD2564 Typ Malz Units KHz KHz KHz KHz KHz KHz KHz KHz sec sec sec sec sec sec sec sec nsec nsec nsec msec msec msec msec msec msec msec msec Conditions 7 7 7 7 3 dB Roll Off Point 8 3 dB Roll Off Point 8 3 dB Roll Off Point 8 3 dB Roll Off Point 8 15 1SD2532 40 48 64 Products Table 11 AC Parameters Die Symbol Characteristic Min Typ Max Units Conditions EEN PD Pulse Width Play I5D2532 ISD2540 ISD2548 ISD2564 Tros PD Pulse Width Static 100 TroH Power Down Hold 0 Ten EOM Pulse Width ISD2532 ISD2540 6 ISD2548 ISD2564 Ving Aux Input Voltage Peak to Peak 3 lt o e 3 lt Peak to Peak NO al N CH on w 3333 nnn Co OO ODO d OOOO V Peak to Peak rt Ee 16 Q 1 Typical values T4 25 C and 5 0 V 2 All Min Max limits are guaranteed by ISD via electrical testing or characterization Not all specifications are 100 percent tested Low frequency cutoff depends upon the value of external capacitors see Pin Descriptions From AUX IN if ANA IN is driven at 50 mVp p the Pour 12 2 mW typical With 5 1 KQ series resistor at ANA IN
21. V Voice Solutions in Silicon 1 Typical values T4 Table 6 DC Parameters Packaged Parts 25 C and 5 0 V Typ Max 2 15 5 0 98 1 0 23 26 5 9 5 Units qB V V qB KQ 15D2532 40 48 64 Products Conditions AGC 2 5V 2 All Min Max limits are guaranteed by ISD via electrical testing or characterization Not all specifications are 100 percent tested 3 Veca and Vecp connected together 4 XCLK pin only Table 7 AC Parameters Packaged Parts Symbol Characteristic Fs Sampling Frequency For Filter Pass Band Trec Record Duration EIS Tce Tser Jun Tpyp Power Up Delay Tppr PD Pulse Width record ISD Min Typ Max ISD2532 ISD2540 ISD2548 ISD2564 ISD2532 ISD2540 ISD2548 ISD2564 ISD2532 ISD2540 ISD2548 ISD2564 ISD2532 ISD2540 ISD2548 ISD2564 ISD2532 ISD2540 ISD2548 ISD2564 ISD2532 ISD2540 ISD2548 ISD2564 Units KHz KHz KHz KHz KHz KHz KHz KHz sec sec sec sec Conditions 7 7 7 7 8 8 8 8 3 OB Roll Off Point 3 OB Roll Off Point 3 OB Roll Off Point 3 OB Roll Off Point 7 11 1SD2532 40 48 64 Products Symbol Trop Pour Vout Vin Vino Vina Characteristic Min Typ Max Units PD Pulse Width play PD Pulse Width Static Power Down Hold EOM Pulse Width E E mer TI EE ANA IN Input Voltage Overflow Pu
22. a ea R Rew DA 5 OPERATIONAL MODES DESCRIPTION oaan 6 MG Message Cueing AEN ney a aa eis tahoe ok eee ee ee ea a 6 M1 Delete EOM Markers 6 M2 UAUSE 254 AN 6 M Message LOOPING A ag SEN dra aia REN e A 6 M4 Consecutive Addressing aaa eee eee eee eee ees 6 M5 CE level AGING A ech A tte A a tha Pied da edo bd adi da AREA AC 6 M6 Push Button Mode 6 GE PSU PAUSE tis sota axed Cie Sea a a oa E eas 7 PDIPIN STOP RESED bs ocean EE A A Ce A a EE A 7 EOM PIA RUN acosa sae prat pets eae Poo eee eee wee 7 Good Audio Design Practices raias aasa CERN EEN e ENEE EE Palau acids 8 ISD1QOOA COMPATIBILITY 8 OVEMIOW orete ea Pea erica aba o Ped eh Wop eae oa bed On Ges 8 Push Button Mode oo tees 8 Looping Meckel wane dw eri eat ao ead AA AA AA ead eo 8 ISD 1SD2532 40 48 64 Products MINE DIAGRAMA ae Od Dele REEVE ERA IN ARE REE A OE EVER ARS 9 TYPICAL PARAMETER VARIATION WITH VOLTAGE AND TEMPERATURE PACKAGED PARTS 0 0 13 TYPICAL PARAMETER VARIATION WITH VOLTAGE AND TEMPERATURE DEI 17 EXPLANATION oid tag ate tif eel te A a RE AR a Big BAG teh ah E A A A kh a EA 19 PUSH BUTTON TIMING DIAGRAMS A A 3 att ein ee Pere ih bho ry ih OU ey io th eed oad 22 PHYSICAL DIMENSIONG sis E AE SS HOES RE awe RE eons AA 23 ORDERING INFORMATION S opt AA taken aun as 29 Voice Solutions in Silicon 15D2532 40 48 64 Products FIGURES CHARTS AND TABLES IN THE 1SD2532 40 48 64 PRODUCTS DATASHEET ISD Figure
23. amples are stored directly into on chip nonvolatile memory without the digitization and compression associated with other solutions Direct analog storage provides a very true natural sounding reproduction of voice music tones and sound effects not available with most solid state digital solutions DURATION To meet end system requirements the ISD2532 40 48 64 products offer single chip solutions at 32 40 48 and 64 seconds Parts may also be cas caded together for longer durations For longer duration ISD2500 products see data sheet ISD2560 75 90 1 20 Products EEPROM STORAGE One of the benefits of ISD s ChipCorder technolo gy is the use of on chip nonvolatile memory pro viding zero power message storage The message is retained for up to 100 years typically without power In addition the device can be re recorded typically over 100 000 times MICROCONTROLLER INTERFACE In addition to its simplicity and ease of use the ISD2500 series includes all the interfaces neces sary for microcontroller driven applications The address and control lines can be interfaced to a microcontroller and manipulated to perform a variety of tasks including message assembly message concatenation predefined fixed mes sage segmentation and message manage ment PROGRAMMING The ISD2500 series is also ideal for playback only applications where single or multiple messages are referenced through buttons switches or a mi cr
24. ce other than a micro phone the signal can be fed capacitively cou pled into the ANA IN pin directly EXTERNAL CLOCK INPUT XCLK The external clock input for the ISD2500 devices has an internal pull down device These devices are configured at the factory with an internal sam pling clock frequency centered to 1 percent of specification The frequency is then maintained to a variation of 2 25 percent over the entire com mercial temperature and operating voltage rang es The internal clock has a 5 percent tolerance over the industrial temperature and voltage range A regulated power supply is recommend ed for industrial temperature range paris If greot er precision is required the device can be clocked through the XCLK pin as follows Table 1 External Clock Sample Rates SE Sample Rate Required Clock ISD2532 8 0 KHz 1024 KHz ISD2540 6 4 KHz 819 2 KHz ISD2548 5 3 KHz 682 7 KHz ISD2564 4 0 KHz 512 KHz These recommended clock rates should not be varied because the antialiasing and smoothing filters are fixed and aliasing problems can occur if the sample rate differs from the one recommended The duty cycle on the input clock is not critical as the clock is immediately divided by two If the XCLK is not used this input must be connected to ground SPEAKER OUTPUTS SP SP All devices in the ISD2500 series include an on chip differential speaker driver capable of driving 50 mW into 16 Q from AUX IN 12 2 mW
25. e Operational Mode s chosen In addition the ad dress pointer is reset to O when the device is changed from record to playback playback to record except M mode or when a Power Down cycle is executed Second Operational Modes are executed when CE goes LOW and the two MSBs are HIGH This Op erational Mode remains in effect until the next LOW going CE signal at which point the current Address Mode levels are sampled and executed Table 2 Operational Modes Mode Control Function MO Message cueing MI Delete EOM markers M2 Not applicable M3 Looping M4 Consecutive addressing M5 CE level activated M Push button control Jointly Compatible Typical Use Fast forward through messages M4 M5 M Position EOM marker at the end of the last M3 M4 M5 M6 message Simplified device interface Mo M1 M3 1 Indicates additional Operational Modes which can be used simultaneously with the given mode ISD 1SD2532 40 48 64 Products OPERATIONAL MODES DESCRIPTION The Operational Modes can be used in conjunc tion with a microcontroller or they can be hard wired to provide the desired system operation MO MESSAGE CUEING Message Cueing allows the user to skip through messages without knowing the actual physical addresses of each message Each CE LOW pulse causes the internal address pointer to skip to the next message This mode should be used for play back only and is typically used with the M
26. e Operating Current Icc LG v 25 70 85 Temperature C m 5 5 Volts e 4 5 Volts Total Harmonic Distortion 25 70 85 Temperature C 55 Volts e 4 5 Volts Chart 3 Standby Current A Chart 4 Percent Change Standby Current Isp 1 2 1 0 0 8 0 6 0 4 0 2 Temperature C 4 5 Volts a 5 5 Volts Oscillator Stability 0 4 0 2 0 0 2 0 4 Temperature C m 5 5 Volts 4 5 Volts 13 1SD2532 40 48 64 Products Table 8 Absolute Maximum Ratings Die Condition Value Junction temperature 150 C Storage temperature range 65 C to 150 C Table 9 Die Condition Commercial operating temperature range Supply voltage Vec Operating Conditions Value 0 Cto 50 C 45 Vto 6 5 V Voltage applied to any pad Vss 0 3 V to Voc 0 3 V Ground voltage Vss Ov Voltage applied to any pad Vss 1 0 V to Input current limited to 20 MA Vcc 1 0 V 1 Voc Veca Veco 2 Vs Vec Vss 0 3 Vto 7 0 V ss Vssa Ven 1 Stresses above those listed may cause permanent damage to the device Exposure to the absolute maximum ratings may affect device reliability Functional operation is not implied at these conditions Table 10 DC Parameters Die Symbol Parameters Min Typ Max Units Conditions lo 40 mA V V V
27. esign practices on layout and power supply decoupling be followed See the Application Information for details ISD1000A COMPATIBILITY The ISD2500 series of devices is designed to pro vide upward compatibility with the ISD1000A fam ily When designing with the ISD2500 series the following differences should be noted The ISD2532 40 48 64 devices have 256K storage cells designed to provide 32 seconds of storage at a sampling rate of 8 0 KHz This is twice the amount of storage of the ISD1000A family To en able the same addressing resolution one addi tional address pin has been added The address space of each device is divisible into 320 incre ments with valid addressing from 00 to 13F Hex OVERFLOW The ISD1000A series combined two functions on the EOM pin end of message indication and overflow The ISD2500 separates these two func tions Pin 25 PDIP package remains as EOM but outputs only the EOM signal indication Pin 22 PDIP package becomes OVF and pulses LOW only when the device reaches its end of memory or is full This change allows easy message cue ing and adaressability across device boundaries This also means that the M2 Operational Mode found in the I5SD1000A family is not implemented in the ISD2500 series PUSH BUTTON MODE The ISD2500 series includes an additional Opera tional Mode called Push Button Mode This pro vides an alternative interface to the record and playback functions of the part
28. evel to prevent distortion at higher supply voltages 21 15D2532 40 48 64 Products PUSH BUTTON TIMING DIAGRAMS Figure 7 Push Button Mode Record CE Start Pause P R PD Stop Reset A0 A8 amp MIC ANA IN lt Tos Se gt Tom 6 7 CE Start Pause P R PD Stop Reset A0 A8 amp SP OVF EOM Run Tog gt Tpyp gt gt Ian Notes 1 2 3 6 7 A8 A7 and A6 1 for push button operation The first CE LOW pulse performs a start function The part will begin to play or record after a power up delay Jor The part must have CE HIGH for a debounce period Tpg before it will recognize another falling edge of CE and pause 5 The second CE LOW pulse and every even pulse thereafter performs a Pause function 6 Again the part must have CE HIGH for a debounce period Tpg before if will recognize another falling edge of CE which would restart an operation In addition the part will not do an internal power down until CE is HIGH for the Tpg time 7 The third CE LOW pulse and every odd pulse thereafter performs a Resume function 8 At any time a HIGH level on PD will stop the current function reset the address counter and power down the device Ah gt No 22 Voice Solutions in Silicon 15D2532 40 48 64 Products PHYSICAL DIMENSIONS Figure 9 28 Lead 8x13 4mm Plastic Thin Small Outline Pac
29. goes HIGH playback will immediately end A new CE LOW will restart the message from the beginning unless M4 is also HIGH M6 PUSH BUTTON MODE The ISD2500 series of devices contain a Push But ton Operational Mode The Push Button Mode is used primarily in very low cost applications and is designed to minimize external circuitry and com ponents thereby reducing system cost In order to configure the device in Push Button Operational Mode the two most significant address bits must be HIGH and the M mode pin must also be HIGH A device in this mode always powers down at the end of each playback or record cycle after CE goes HIGH When this operational mode is implemented several of the pins on the device have altemate functionality Table 3 Alternate Functionality in Pins Bin Name Alternate Functionality in Push Button Mode CE Start Pause Push Button LOW pulse activated PD Stop Reset Push Button HIGH pulse activated EOM Active HIGH Run Indicator Voice Solutions in Silicon CE PIN START PAUSE In Push Button Operational Mode CE acts as a LOW going pulse activated START PAUSE signal If no operation is currently in progress a LOW going pulse on this signal will initiate a playback or a record cycle according to the level on the P R pin A subsequent pulse on the CE pin before an EOM is reached in playback or an overflow condition occurs will cause the device to pause The ad dress counter is not reset
30. has an internal Vec detect circuit to maintain message integrity should Vee fall below 3 5 V In this case EOM goes LOW and the device is fixed in Playback only mode When the device is configured in Operational Mode M6 Push Button Mode this pin provides an active HIGH RUN signal indicating the device is currently recording or playing This signal can con veniently drive an LED for a visual indicator of a record or playback operation in process OVERFLOW OUTPUT OVF This signal pulses LOW at the end of memory space indicating ihe device has been filled and the message has overflowed The OVF output then follows the CE input until a PD pulse has reset the device This pin can be used to cascade several ISD2500 devices together to increase record playback durations ISD 15D2532 40 48 64 Products MICROPHONE INPUT MIC The microphone input transfers its signal to the on chip preamplifier An on chip Automatic Gain Control AGC circuit controls the gain of this preamplifier from 15 to 24 dB An external micro phone should be AC coupled to this pin via a se ries capacitor The capacitor value together with the internal 10 KQ resistance on this pin deter mines the low frequency cutoff for the ISD2500 se ries passband See ISD s Application Information for additional information on low frequency cutoff calculation MICROPHONE REFERENCE INPUT MIC REF The MIC REF input is the inverting input to the mi crophone
31. ides single Low frequency cutoff pole low frequency cutoff and common mode noise rejection C2 Attack Release time constant Sets attack release time for AGC C3 Low frequency cutoff capacitor Provides additional pole for low frequency cutoff C4 Microphone power supply decoupling Reduces power supply noise C6 C7 C8 Power supply capacitors Filter and bypass of power supply EXPLANATION In this simplified block diagram of a microcontroller application the Push Button Mode and message cueing are used The microcontroller is a 16 pin version with enough port pins for buttons an LED and the ISD2500 series device The software can be written to use three buttons one each for play and record and one for message selection Be cause the microcontroller is interpreting the but tons and commanding the ISD2500 device software can be written for any functions desired in a particular application ISD NOTE ISD does not recommend connecting address lines directly to a microprocessor bus Address lines should be externally latched 19 15D2532 40 48 64 Products Figure 5 1SD2532 40 48 64 Application Example Microcontroller ISD2500 Interface Vee Veco k n Veca Vssp Vssa SP U2 SP AUX IN ANA IN ANA OUT MIC REF Figure 6 ISD2532 40 48 64 Application Example Push Button Vec ISD2532 40 48 64 28 Vcc Vcc hin 12 ONES Sol ue 5 Ju TH 22 uF 2 L i R6 a z 100 KQ MU Q 4 z STARTI
32. kage TSOP Type I E A gt lt B gt 2 3 4 5 6 7 8 9 Table 17 Plastic Thin Small Outline Package TSOP Type I E Dimensions INCHES MILLIMETERS 5 O 3 D x 5 O 3 Max 0 520 0 528 0 535 13 20 13 40 13 60 0 461 0 465 0 469 11 70 11 80 11 90 0 311 0 315 0 319 8 00 8 10 0 15 0 007 0 009 0 011 0 22 0 27 0 037 0 039 0 041 0 95 1 00 1 05 pe e o e 0 020 0 022 0 028 0 55 0 70 J 0 004 0 008 0 10 0 21 Cl oi mim ol oOl gt CH CH CH N O pojyoj lt CH O Os CH CH al NOTE Lead coplanarity to be within 0 004 inches ISD 23 15D2532 40 48 64 Products Figure 10 28 Lead 0 600 Inch Plastic Dual Inline Package PDIP P 28 27 26 25 24 23 22 21 20 19 18 17 16 15 Table 18 Plastic Dual Inline Package PDIP P Dimensions INCHES MILLIMETERS Min Nom Max Min Nom Max A 1 445 1 450 1 455 36 70 36 83 36 96 CT AR q 0 15 0 15 24 Voice Solutions in Silicon A B C D E F G H NOTE ISD 15D2532 40 48 64 Products Figure 11 28 Lead 0 300 Inch Plastic Small Outline Integrated Circuit SOIC S Table 19 Plastic Small Outline Integrated Circuit SOIC S Dimensions INCHES Min Nom 0 701 0 706 0 711 17 81 17 93 et TI 0 024 0 032 Lead coplanarity to be within 0 004 inches Max 0 040 Min 0 61 MILLIMETER Nom 0 81 Max 18 06 2 64
33. lse Width Aux Input Voltage Table 7 AC Parameters Packaged Parts ISD2532 ISD2540 ISD2548 ISD2564 ISD2532 ISD2540 ISD2548 ISD2564 5 L SU 1 Typical values T4 25 C and 5 0 V 2 All Min Max limits are guaranteed by ISD via electrical testing or characterization Not all specifications are 100 percent tested NQGA amp o w la Conditions Mrt 600 Q Peak to Peak Peak to Peak Peak to Peak Mrt 16 Q Low frequency cutoff depends upon the value of external capacitors see Pin Descriptions From AUX IN if ANA IN is driven at 50 mV p p the Pour 12 2 mW typical With 5 1 KQ series resistor at ANA IN Tpps is required during a static condition typically overflow Sampling Frequency and playback Duration can vary as much as 2 25 percent over the commercial temperature range and voltage range and 5 percent over the industrial temperature and voltage range For greater stability an external clock can be utilized see Pin Descriptions 8 Filter specification applies to the antialiasing filter and the smoothing filter Therefore from input to output expect a dB drop by nature of passing through both filters 12 Voice Solutions in Silicon 1SD2532 40 48 64 Products TYPICAL PARAMETER VARIATION WITH VOLTAGE AND TEMPERATURE PACKAGED PARTS Chart 1 Operating Current mA 25 20 Chart 2 Percent Distortion ISD 0 7 0 6 0 5 0 4 Record Mod
34. ocontroller Once the desired message configu ration is created duplicates can easily be generated via an ISD programmer Voice Solutions in Silicon 15D2532 40 48 64 Products Figure 1 1SD2532 40 48 64 Device Pinouts 28 PIN TSOP 28 K ANA OUT AOQ MOL_ 10 VCCD Al M1 CLJ 2 P R A2 M2 3 XCLK A3 M3 C 4 EOM A4 M4 C 5 PD A5 M5 L 6 TE A6 M6 C 7 OVF NC C 8 ANA OUT Ai EI ANA IN A8 C 10 AGC AUX INE 11 MIC REF VSSD 7 12 MIC VSSA J 13 VCCA SP 14 SP DIP SOIC PIN DESCRIPTIONS VOLTAGE INPUTS Veca Vecp To minimize noise the analog and digital circuits in the ISD2500 series devices use separate power busses These voltage busses are brought out to separate pins and should be tied together as close to the supply as possible In addition these supplies should be decoupled as close to the package as possible GROUND INPUTS Vesa Vssp The ISD2500 series of devices utilizes separate an alog and digital ground busses These pins should be connected separately through a low imped ance path to power supply ground POWER DOWN INPUT PD When not recording or playing back the PD pin should be pulled HIGH to place the part in a very low power mode see lsg specification When overflow OVF pulses LOW for an overflow condi tion PD should be brought HIGH to reset the ad dress pointer back to the beginning of the record playback space The PD pin has additional func tionality in the M Push
35. preamplifier This provides a noise can celing or common mode rejection input to the device when connected to a differential micro phone AUTOMATIC GAIN CONTROL INPUT AGC The AGC dynamically adjusts the gain of the preamplifier to compensate for the wide range of microphone input levels The AGC allows the full range of whispers to loud sounds to be recorded with minimal distortion The attack time is deter mined by the time constant of a 5 KQ internal re sistance and an external capacitor C2 on the schematic on page 18 connected from the AGC pin to Vssq analog ground The release time is determined by the time constant of an external resistor R2 and an external capacitor C2 con nected in parallel between the AGC Pin and Vssa analog ground Nominal values of 470 KQ and 4 7 uF give satisfactory results in most cases ANALOG OUTPUT ANA OUT This pin provides the preamplifier output to the us er The voltage gain of the preamplifier is deter mined by the voltage level at the AGC pin 1SD2532 40 48 64 Products ANALOG INPUT ANA IN The analog input pin transfers its signal to the chip for recording For microphone inputs the ANA OUT pin should be connected via an external capaci tor to the ANA IN pin This capacitor value togeth er with the 3 0 KQ input impedance of ANA IN is selected to give additional cutoff at the low fre quency end of the voice passband If the desired input is derived from a sour
36. tage applied to any pin Vss 1 0 V to Input current limited to Vcc 1 0 V 20 mA Lead temperature soldering 300 C 10 seconds Veco Vss 0 3 V to 7 0V Stresses above those listed may cause permanent damage to the device Exposure to the absolute maximum ratings may affect device reliability Functional operation is not implied at these conditions UC to 70 C Commercial operating temperature range Industrial operating temperature range Supply voltage Vac 4 5V to 5 5 V Ground voltage Vs Ov Case temperature Vee Veca Veco Vss Vssa Ve Consult factory KR wND gt Table 6 DC Parameters Packaged Parts Symbol Parameters Min Typ Max Units Conditions Vi Input Low Voltage 0 8 ViH Input High Voltage 2 0 V VoL Output Low Voltage 0 4 V lo 4 0 mA VoH Output High Voltage Vcc 0 4 V loH 10 yA Mou OVF Output High Voltage 2 4 V lon 1 6 MA VoH2 EOM Output High Voltage Vcc 1 0 Vcc 0 8 V lon 3 2 mA Icc Vcc Current Operating 25 30 mA Reyr lop Voc Current Standby 1 10 JA 0 liL Input Leakage Current uA lLPD Input Current HIGH w Pull 130 uA Force Vcc Down RexT Output Load Impedance 16 Q Speaker Load Ric Preamp In Input 4 9 15 KQ MIC and MIC REF Pins Resistance Raux AUX INPUT Resistance 5 11 20 KQ RANA IN ANA IN Input Resistance 2 3 3 5 KQ APRE Preamp Gain 1 21 24 26 dB AGC 0 0
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