ANALOG DEVICES AD8601/AD8602/AD8604 handbook
Contents
1. 1 2 a IT OFFSET VOLTAGE mV C QUANTITY Amplifiers 0 2 0 1 0 0 8 0 6 0 4 0 2 0 02 04 06 08 1 0 0 0 5 1 0 15 2 0 2 5 3 0 INPUT OFFSET VOLTAGE mV COMMON MODE VOLTAGE V TPC 2 Input Offset Voltage Distribution TPC 5 Input Offset Voltage vs Common Mode Voltage 60 Vs 3V TA 25 C TO 85 C 50 E g l 2 40 3 E S lt 3 gt 30 E E P 3 6 20 5 o Z 10 0 TCVOS uVPC COMMON MODE VOLTAGE V TPC 3 Input Offset Voltage Drift Distribution TPC 6 Input Offset Voltage vs Common Mode Voltage REV D b5 AD8601 AD8602 AD8604 300 250 a a a a I 200 z Z ul 3 150 2 ul 2 e o E 100 amp 5 z a ai Z 50 0 0 40 25 10 5 20 35 50 65 80 95 110 125 40 25 10 5 20 35 50 65 80 95 110 125 TEMPERATURE C TEMPERATURE C TPC 7 Input Bias Current vs Temperature TPC 10 Input Offset Current vs Temperature 300 30 Vg 5V 250 25 a a a a l 20 5 200 i tr a a 2 B 150 2 45 LU 2 P E s b 100 10 amp 5 z a z Z 50 5 02. TIME 400ns DIV TPC 44 Large Signal Transient Response TIME 400ns DIV Vg 27V RL 10kQ Ay Vin Ta 25 C Vour TPC 45 No Phase Reversal TIME 2 0ps DIV VOLTAGE 1V DIV TIME 2 0p s DIV TPC 46 No Phase Reversal VOLTAGE V Vout TRACE 10mV TIME 100ns DIV TPC 47 Settling Time OUTPUT SWING V 350 SETTLING TIME ns TPC 48 Output Swing vs Settling Time 12 REV D AD8601 AD8602 AD8604 0 01 0 01 OUTPUT SWING V 0 200 400 600 800 1 000 SETTLING TIME ns TPC 49 Output Swing vs Settling Time THEORY OF OPERATION The AD8601 AD8602 AD8604 family of amplifiers are rail to rail input and output precision CMOS amplifiers that operate from 2 7 V to 5 0 V of power supply voltage These amplifiers use Analog Devices DigiTrim technology to achieve a higher degree of precision than available from most CMOS amplifiers DigiTrim technology is a method of trimming the offset volt age of the amplifier after it has already been assembled The advantage in post package trimming lies in the fact that it cor rects any offset voltages due to the mechanical stresses of assembly
3. Stresses above those listed under Absolute Maximum Ratings may cause perma nent damage to the device This is a stress rating only functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied Exposure to absolute maximum rating conditions for extended periods may affect device reliability 40 C to 125 C 0ja is specified for worst case conditions i e Oja is specified for device in socket for PDIP packages Oya is specified for device soldered onto a circuit board for surface mount packages 65 C to 150 C 300 C ORDERING GUIDE Temperature Package Package Model Range Description Option Branding AD8601ART R2 40 C to 125 C 5 Lead SOT 23 RT 5 AAA AD8601ART REEL 40 C to 125 C 5 Lead SOT 23 RT 5 AAA AD8601ART REEL7 40 C to 125 C 5 Lead SOT 23 RT 5 AAA AD8601DRT R2 40 C to 125 C 5 Lead SOT 23 RT 5 AAD AD8601DRT REEL 40 C to 125 C 5 Lead SOT 23 RT 5 AAD AD8601DRT REEL7 40 25 5 SOT 23 RT 5 ADB6 Lead SOI AD8602 0 q OI AD8602DR 40 C to 125 C 8 Lead SOIC R 8 AD8602DR REEL 40 C to 125 C 8 Lead SOIC R 8 AD8602DR REEL7 40 C to 125 C 8 Lead SOIC R 8 AD8602ARM R2 40 C to 125 C 8 Lead MSOP RM 8 ABA AD8602ARM REEL 40 C to 125 C 8 Lead MSOP RM 8 ABA AD8602DRM REEL 40 C to 125 C 8 Lead MSOP RM 8 ABD AD8604AR 40 C to 125 C 14 Lead SOIC R 14 AD8604AR REEL 40
4. 0 40 25 10 5 20 35 50 65 80 95 110 125 40 25 10 5 20 35 50 65 80 95 110 125 TEMPERATURE C TEMPERATURE C TPC 8 Input Bias Current vs Temperature TPC 11 Input Offset Current vs Temperature 10k Vg 2 7V Ta 25 C 1k lt o gt I E E I E 100 tt a 8 5 SOURCE M 9 SINK lt lt 5 10 o E E z 2 z o 1 0 1 0 05 10 15 20 25 30 35 40 45 50 0 001 0 01 0 1 1 10 100 COMMON MODE VOLTAGE V LOAD CURRENT mA TPC 9 Input Bias Current vs Common Mode Voltage TPC 12 Output Voltage to Supply Rail vs Load Current 6 REV D AD8601 AD8602 AD8604 gt zz E Ba 25 A w v M VoL 1mA LOAD 2 EHH 2 20 E 5 2 LIII 9 5 LI L 15 a 2 E E gt ii l 0 1 0 0 001 0 01 0 1 1 10 100 40 25 10 5 20 35 50 65 80 95 110 125 LOAD CURRENT mA TEMPERATURE C TPC 13 Output Voltage to Supply Rail vs Load Current TPC 16 Output Voltage Swing vs Temperature 2 67 Vs 27V 2 66 gt gt l I lt 255 8 a Vo 1mA LOAD gt gt E E 2 gt 2 64 E E gt gt o o 2 63 4 5 2 62 40 25 10 5 20 35 50 65 80 95 110 125 40 25 10 5 20 35 50
5. 9 5 a i a 2 ul n o E 9 2 o o 0 1k 10k 100k 1M 10M 100M 1k 10k 100k FREQUENCY Hz FREQUENCY Hz TPC 20 Closed Loop Gain vs Frequency TPC 23 Closed Loop Output Voltage Swing vs Frequency 200 Vg 5V Ta 25 C 180 Ay 100 40 160 m a 2 I 140 S Ay 10 S l 3 20 Z 120 a a 8 W 100 d Ay 21 z n 9 b 80 i 3 E 9 60 d 8 40 20 0 LL 1k 10k 100k 1M 10M 100M 100 1k 10k 100k 1M 10M FREQUENCY Hz FREQUENCY Hz TPC 21 Closed Loop Gain vs Frequency TPC 24 Output Impedance vs Frequency 8 REV D AD8601 AD8602 AD8604 200 Vs 5V 180 Er 25 C D 160 9 E i DA o y E Z 120 u a Ay 100 u DI D 100 Ay 10 21 E 80 2 Ay z1 a gt 60 D o u I 8 LI 40 2 20 20 0 40 100 1k 10k 100k 1M 10M 100 1k 10k 100k 1M 10M FREQUENCY Hz FREQUENCY Hz TPC 25 Output Impedance vs Frequency TPC 28 Power Supply Rejection Ratio vs Frequency 160 Vs 3V 1407 25 C a 120 RI 6 100 2 8 o 80 d i 60 2 8 S S 40 z z o o 9 20 8 T 0 20 40 0 1k 10k 100k 1M 10M 20M 10 100 1k FREQUENCY Hz CAPACITANCE pF TPC 26
6. The AD860x has excellent recovery time from overload condi tions The output recovers from the positive supply rail within 200 ns at all supply voltages Recovery from the negative rail is within 500 ns at 5 V supply decreasing to within 350 ns when the device is powered from 2 7 V Power On Time Power on time is i i table ag blica e supply voltage t e togg j e device to improvelba life astipowe 9 efisur s that the output of the amplifier will quickly settle to its final voltage improving the power up speed of the entire system Once the supply voltage reaches a minimum of 2 5 V the AD860x will settle to a valid output within 1 us This turn on response time is faster than many other precision amplifiers which can take tens or hundreds of microseconds for their outputs to settle Using the AD8602 in High Source Impedance Applications The CMOS rail to rail input structure of the AD860x allows these amplifiers to have very low input bias currents typically 0 2 pA This allows the AD860x to be used in any application that has a high source impedance or must use large value resis tances around the amplifier For example the photodiode amplifier circuit shown in Figure 3 reguires a low input bias current op amp to reduce output voltage error The AD8601 minimizes offset errors due to its low input bias current and low offset voltage The current through the photodiode is proportional to the inci dent light power on its surfac
7. 1 5 2 0 2 5 SUPPLY VOLTAGE V FREQUENCY kHz TPC 33 Supply Current per Amplifier vs Supply Voltage TPC 36 Voltage Noise Density vs Frequency 10 REV D AD8601 AD8602 AD8604 208 Vg 5V Ta 25 C 182 156 a 130 2 D 15 S 104 9 78 5 8 52 o gt 26 n 0 5 1 0 15 2 0 2 5 FREQUENCY kHz TIME 18 DIV TPC 37 Voltage Noise Density vs Freguency TPC 40 0 1 Hz to 10 Hz Input Voltage Noise Vs EN R 10kO E C 200pF Ta 25 C E x E 7 fi D ul a o z ul o lt e o gt 50 0mV DIV 200ns DIV 0 5 10 15 20 25 FREQUENCY kHz TPC 38 Voltage Noise Density vs Frequency TPC 41 Small Signal Transient Response Vs 2 7V R 10kQ C 200pF Ta 25 C gt i e y uh LR au Tet is LEE AN TITTI pg I ul H 2 P NI mi il il mi Hd k id E o gt 50 0mV DIV 200ns DIV TIME 1s DIV TPC 39 0 1 Hz to 10 Hz Input Voltage Noise TPC 42 Small Signal Transient Response REV D 11 AD8601 AD8602 AD8604 VOLTAGE 1 0V DIV VOLTAGE 500mV DIV VOLTAGE 1V DIV TPC 43 Large Signal Transient Response
8. D Grade Parameter Symbol Conditions Min Typ Max Min Typ Max Unit INPUT CHARACTERISTICS Offset Voltage AD8601 AD8602 Vos 0V lt Voms 1 3V 80 500 1 100 6 000 UN 40 C lt Ta lt 85 C 700 7 000 UV 40 C lt T4 lt 125 C 1 100 7 000 UV 0 V lt Vem lt 3 V 350 750 1 300 6 000 uV 40 C lt Ta 85 C 1 800 7 000 UV 40 C lt Ty lt 125 C 2 100 7 000 UV Offset Voltage AD8604 Vos Vem 0 V to 1 3 V 80 600 1 100 6 000 UN 40 C lt Ta lt 85 C 800 7 000 uV 40 C lt T lt 125 C 1 600 7 000 uV Vem 0 V to 3 0 V 350 800 1 300 6 000 uV 40 C lt Ta 85 C 2 200 7 000 UV 40 C lt Ty lt 125 C 2 400 7 000 UV Input Bias Current Ig 0 2 60 0 2 200 pA 40 C lt Ta lt 85 C 25 100 25 200 pA 40 C lt TA 125 C 150 1 000 150 1 000 pA Input Offset Current Ios 0 1 30 0 1 100 pA 40 C lt T4 85 C 50 100 pA 40 C lt T4 lt 125 C 500 500 pA Input Voltage Range 0 3 0 3 V Common Mode Rejection Ratio CMRR Vem 0Vto3V 68 83 52 65 dB Large Signal Voltage Gain Avo Vo 0 5 V to 2 5 V Ri 2kQ Veq 0V 30 100 20 60 V mV Offset Voltage Drift AVo 2 UVPC Output Voltagoffli Vou m A 2 92 l 2 2 V 40 C lt Ta 125 C 2 88 2 88 V Output Voltage Low Vor I 1 0mA 20 35 20 35 mV 40 C lt Ta lt 125 C 50 50 mV Output Current lour 30 30 mA Closed Loop Output Impedance Zour f 1 MHz Ay 1 12 12 Q POWER SUPPLY Power Supply Rejection Ratio PS
9. Ri 2 kQ Vom 0 V Offset Voltage Drift AVos AT 2 2 UV C OUTPUT CHARACTERISTICS Output Voltage High Vou IL 1 0 mA 4 025 4 975 4 025 4 975 V Ij 10mA 4 7 4 77 4 7 4 77 V 40 C lt Ta lt 125 C 4 6 4 6 V Output Voltage Low 15 30 mV 125 175 mV 250 mV Output Gurr A 50 mA Closed Li e 10 Q POWER SUPPL Power Supply Rejection Ratio PSRR Vs 2 7 V to 5 5 V 67 56 72 dB Supply Current Amplifier Isy Vo 20V 750 1 200 uA 40 C TA 125 C 1 500 1 500 uA DYNAMIC PERFORMANCE Slew Rate SR RL 2 kQ 6 6 V us Settling Time ts To 0 01 lt 1 0 lt 1 0 us Full Power Bandwidth BWp lt 1 Distortion 360 360 kHz Gain Bandwidth Product GBP 8 4 8 4 MHz Phase Margin Po 55 55 Degrees NOISE PERFORMANCE Voltage Noise Density En f 1 kHz 33 33 nV NHz e f 10 kHz 18 18 nV NHz Current Noise Density in f 1 kHz 0 05 0 05 pANHZ Specifications subject to change without notice REV D AD8601 AD8602 AD8604 dea EE cy Package Type at te Umi Input Voltage ecce te tea ie erue GND to Vs 5 Lead SOT 23 RT 230 92 C W Differential Input Voltage 6V 8 Lead SOIC R 158 43 C W Storage Temperature Range 8 Lead MSOP RM 210 45 CW R RM RT RU Packages 65 C to 150 C 14 Lead SOIC R 120 36 C W Operating Temperature Range 14 Lead TSSOP RU 180 35 C W AD8601 AD8602 AD8604 Junction Temperature Range R RM RT RU Packages Lead Temperature Range Soldering 60 sec ESD
10. The 100 uF output coupling capacitors block dc cur rent and the 20 Q series resistors protect the amplifier from short circuits at the jack 5V AD1881 AC 97 NOTE ADDITIONAL PINS OMITTED FOR CLARITY U1 AD8602D Figure 8 A PC100 Compliant Line Output Amplifier SPICE Model The SPICE macro model for the AD860x amplifier is available and can be downloaded from the Analog Devices website at www analog com The model will accurately simulate a number of both dc and ac parameters including open loop gain bandwidth phase margin input voltage range output voltage swing versus output current slew rate input voltage noise CMRR PSRR and supply current versus supply voltage The model is optimized for performance at 27 C Although it will function at different temperatures it may lose accuracy with respect to the actual behavior of the AD860x 15 AD8601 AD8602 AD8604 OUTLINE DIMENSIONS 14 Lead Thin Shrink Small Outline Package TSSOP RU 14 Dimensions shown in millimeters 0 20 1 20 145MAX 022 wax 009 p C ars y 006 30 T fa nes j E l At 10 gt le 0 05 SEATING 0 45 ruta ue 0 19 PLANE ra id 0 15 MAX 0 50 SEATING 5 0 60 9 0 30 PLANE 0 0 45 COMPLIANT TO JEDEC STANDARDS MO 153AB 1 0 30 COMPLIANT TO JEDEC STANDARDS MO 178AA 14 Lead Standard Small Outline Package SOIC 8 Lead Mini Small Outline Package MS
11. This technology is scalab package opti OT 23 voltages th ed i The DigiTrim process 1s done at the factory and does not add additional pins to the amplifier All AD860x amplifiers are available in standard op amp pinouts making DigiTrim com pletely transparent to the user The AD860x can be used in any precision op amp application The input stage of the amplifier is a true rail to rail architecture allowing the input common mode voltage range of the op amp to extend to both positive and negative supply rails The voltage swing of the output stage is also rail to rail and is achieved by using an NMOS and PMOS transistor pair connected in a com mon source configuration The maximum output voltage swing is proportional to the output current and larger currents will limit how close the output voltage can get to the supply rail This is a characteristic of all rail to rail output amplifiers With 1 mA of output current the output voltage can reach within 20 mV of the positive rail and within 15 mV of the negative rail At light loads of 2100 kQ the output swings within 1 mV of the supplies The open loop gain of the AD860x is 80 dB typical with a load of 2 kQ Because of the rail to rail output configuration the gain of the output stage and the open loop gain of the amplifier are dependent on the load resistance Open loop gain will de crease with smaller load resistances Again this is a characteristic inherent to all rail to rail
12. Voltage vs Common Mode Voltage 24 SOIC Units 25 C 0 7 0 4 0 1 2 3 4 5 Ven V Figure 2 AD8602AR Input Offset Voltage vs Common Mode Voltage 300 SOIC Units 25 C E AD8601 AD8602 AD8604 Input Overvoltage Protection As with any semiconductor device if a condition could exist that would cause the input voltage to exceed the power supply the device s input overvoltage characteristic must be considered Excess input voltage will energize internal PN junctions in the AD860x allowing current to flow from the input to the supplies This input current will not damage the amplifier provided it is limited to 5 mA or less This can be ensured by placing a resis tor in series with the input For example if the input voltage could exceed the supply by 5 V the series resistor should be at least 5 V 5 mA 1 kQ With the input voltage within the supply rails a minimal amount of current is drawn into the inputs which in turn causes a negligible voltage drop across the series resistor Therefore adding the series resistor will not adversely affect circuit performance Overdrive Recovery Overdrive recovery is defined as the time it takes the output of an amplifier to come off the supply rail when recovering from an overload signal This is tested by placing the amplifier in a closed loop gain of 10 with an input square wave of 2 V p p while the amplifier is powered from either 5 V or 3 V
13. output amplifiers REV D ery offse 0 2 es gt 0 Rail to Rail Input Stage The input common mode voltage range of the AD860x extends to both positive and negative supply voltages This maximizes the usable voltage range of the amplifier an important feature for single supply and low voltage applications This rail to rail input range is achieved by using two input differential pairs one NMOS and one PMOS placed in parallel The NMOS pair is active at the upper end of the common mode voltage range and the PMOS pair is active at the lower end The NMOS and PMOS input stages are separately trimmed using DigiTrim to minimize the offset voltage in both differen tial pairs Both NMOS and PMOS input differential pairs are active in a 500 mV transition region when the input common mode voltage is between approximately 1 5 V and 1 V below the positive supply voltage Input offset voltage will shift slightly in this transition region as shown in TPCs 5 and 6 Common mode rejection ratio will also be slightly lower when the input common mode voltage is within this transition band Compared to the Burr Brown OPA2340 rail to rail input amplifier shown in Figure 1 the AD860x shown in Figure 2 exhibits lower offset voltage shift across the entire input common mode range including the transition region N j V 0 1 Y d Vem V Figure 1 Burr Brown OPA2340UR Input Offset
14. 65 80 95 110 125 TEMPERATURE C TEMPERATURE C TPC 14 Output Voltage Swing vs Temperature TPC 17 Output Voltage Swing vs Temperature 250 Vs 3V 100 RL NO LOAD Ta 25 C 200 80 gt o E 60 45 w 6 150 m 40 90 a E i 8 z 20 135 E gt 3 I E fo o 5 100 0 180 w a 7 5 f 8 20 E 50 40 60 0 40 25 10 5 20 35 50 65 80 95 110 125 1k 10k 100k 1M 10M 100M TEMPERATURE C FREQUENCY Hz TPC 15 Output Voltage Swing vs Temperature TPC 18 Open Loop Gain and Phase vs Frequency REV D 7 AD8601 AD8602 AD8604 GAIN dB 3 0 Vs 5V 100 R NO LOAD Ta 25 C sok 2 5 o a Vin 2 6V p p 60 45 A IN 5 2 0 Ry 2kO 40 20 8 Ta 25 C 1 S Ay 1 E Z 20 135 E E15 5 o 0 180 w 5 7 a lt 5 1 0 co amp o GN 0 5 60 0 1k 10k 100k 1M 10M 100M FREQUENCY Hz FREQUENCY Hz TPC 19 Open Loop Gain and Phase vs Frequency TPC 22 Closed Loop Output Voltage Swing vs Frequency m Vg 5V gt 2 Vin 4 9V p p z gt RL 2k0 Fi Ta 25 C a S ay t o
15. AD8604 For the high side monitor the monitor output voltage is Monitor Output R2 x Rsense XI put Rl L 3 Using the components shown the monitor output transfer func tion is 2 5 V A Using the AD8601 in Single Supply Mixed Signal Applications Single supply mixed signal applications requiring 10 or more bits of resolution demand both a minimum of distortion and a maximum range of voltage swing to optimize performance To ensure that the A D or D A converters achieve their best perfor mance an amplifier often must be used for buffering or signal conditioning The 750 uV maximum offset voltage of the AD8601 allows the amplifier to be used in 12 bit applications powered from a 3 V single supply and its rail to rail input and output ensure no signal clipping Figure 6 shows the AD8601 used as an input buffer amplifier to the AD7476 a 12 bit 1 MHz A D converter As with most A D converters total harmonic distortion THD increases with higher source impedances By using the AD8601 in a buffer configuration the low output impedance of the amplifier mini mizes THD while the high input impedance and low bias current of the op amp minimizes errors due to source impedance The 8 MHz gain bandwidth product of the AD8601 ensures no signal attenuation up to 500 kHz which is the maximum Nyquist frequency for the AD7476 AD7476 AD7477 SERIAL INTERFACE Figure 6 A Complete 3 V 12 Bit 1 MHz A D Conversion System Figure 7 demonstra
16. ANALOG DEVICES Precision CMOS Single Supply Rail to Rail Input Output Wideband Operational Amplifiers AD8601 AD8602 AD8604 FEATURES Low Offset Voltage 500 pV Max Single Supply Operation 2 7 V to 5 5 V Low Supply Current 750 pA Amplifier Wide Bandwidth 8 MHz Slew Rate 5 V s Low Distortion No Phase Reversal Low Input Currents Unity Gain Stable APPLICATIONS Current Sensing Barcode Scanners PA Controls Battery Powered Instrumentation Multipole Filters Sensors ASIC Input or Output Amplifiers Audio GENERAL DESCRIPTION use a new patented trimming technique that achieves superior performance without laser trimming All are fully specified to operate on a 3 V to 5 V single supply The combination of low offsets very low input bias currents and high speed make these amplifiers useful in a wide variety of applications Filters integrators diode amplifiers shunt current sensors and high impedance sensors all benefit from the combi nation of performance features Audio and other ac applications benefit from the wide bandwidth and low distortion For the most cost sensitive applications the D grades offer this ac per formance with lower dc precision at a lower price point Applications for these amplifiers include audio amplification for portable devices portable phone headsets bar code scanners portable instruments cellular PA controls and multipole filters The ability to swing rail to r
17. C to 125 C 14 Lead SOIC R 14 AD8604AR REEL7 40 C to 125 C 14 Lead SOIC R 14 AD8604DR 40 C to 125 C 14 Lead SOIC R 14 AD8604DR REEL 40 C to 125 C 14 Lead SOIC R 14 AD8604ARU 40 C to 125 C 14 Lead TSSOP RU 14 AD8604ARU REEL 40 C to 125 C 14 Lead TSSOP RU 14 AD8604DRU 40 C to 125 C 14 Lead TSSOP RU 14 AD8604DRU REEL 40 C to 125 C 14 Lead TSSOP RU 14 CAUTION ESD electrostatic discharge sensitive device Electrostatic charges as high as 4000 V readily accumulate on the human body and test eguipment and can discharge without detection Although the AD8601 AD8602 AD8604 features proprietary ESD protection circuitry permanent damage may occur on devices subjected to high energy electrostatic discharges Therefore proper ESD precautions are recommended to avoid performance degradation or loss of functionality WARNING el SENSITIVE DEVICE REV D Typical Performance Characteristics AD8601 AD8602 AD8604 3 000 60 Vg 3V Vs 5V Ta 25 C TA 25 C TO 85 C 2 500 F Voy OV TO 3V 50 p 2 2 000 40 a a lt lt 1 500 30 E E E z Sj 1 000 S 20 o o 500 10 0 10 0 8 0 6 0 4 0 2 0 02 04 0 6 0 8 1 0 INPUT OFFSET VOLTAGE mV TCVOS pVC TPC 1 Input Offset Voltage Distribution TPC 4 Input Offset Voltage Drift Distribution Vs 5V Ta 25 C Vom OV TO 5V
18. Common Mode Rejection Ratio vs Frequency TPC 29 Small Signal Overshoot vs Load Capacitance 160 70 Vg 5V 140 Ta 25 C Vs 5V a 60 RL 00 120 L Ta 25 C I 5 100 50f Av o O o l 80 E E Bo E 60 E a 30 2 40 x T z o S 20 20 z a B E E JA B 10 E HOS 40 0 1k 10k 100k 1M 10M 20M 10 100 1k FREQUENCY Hz CAPACITANCE pF TPC 27 Common Mode Rejection Ratio vs Frequency TPC 30 Small Signal Overshoot vs Load Capacitance REV D 9 AD8601 AD8602 AD8604 12 1 0 0 8 0 6 THD N 0 4 0 2 SUPPLY CURRENT PER AMPLIFIER mA 0 40 25 10 5 20 35 50 65 80 95 110 125 0 100 1k 10k 20k TEMPERATURE C FREQUENCY Hz TPC 31 Supply Current per Amplifier vs Temperature TPC 34 Total Harmonic Distortion 4 Noise vs Frequency VOLTAGE NOISE DENSITY nV Hz SUPPLY CURRENT PER AMPLIFIER mA 040 25 10 5 20 35 50 e 80 95 110 125 0 5 10 15 20 25 TEMPERATURE C FREQUENCY kHz TPC 32 Supply Current per Amplifier vs Temperature TPC 35 Voltage Noise Density vs Frequency 0 8 lt 0 7 i E m gt ul i 0 6 i al gt E 05 3 g a 04 e 5 o o 0 3 z 3 g gt 0 2 5 o a gt 2 01 0 0 1 2 3 4 5 6 0 0 5 1 0
19. ENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN 16 REV 5 Lead Small Outline Transistor Package SOT 23 RT 5 Dimensions shown in millimeters E 2 90 BSC ee 4 5 4 1 60 BSC 2 80 BSC 6 40 144 rud PIN 1 0 95 BSC 130 La a AD8601 AD8602 AD8604 Revision History Location Page 11 03 Data Sheet changed from REV C to REV D Changes to BEATTURES i a ud dos ote ex d ea ree M esce eet itd ee D t e RI ead a a VAN oh 1 Changes to ORDERING GUIDE iii bii e ARE ie NEEN ENEE NEEN NENNEN ENEE EEN 4 3 03 Data Sheet changed from REV B to REV C Changes to FEATURES et wette DEP gel et SLVR KE RD eS dE aq ERR th gier ect 1 3 03 Data Sheet changed from REV A to REV B Change to FEATURES id ik iva esee aka taal a naa galat c i deed hd e 1 Change to FUNCTIONAL BLOCK DIAGRAMS 1 Change to TRE 39 A uos orbe X web I aA ed e Ven CR dire ene ed tt reb e ta 11 Changes to Figures LA 5 4 eue Vect RR a Endet cete ang alis d a taie ed een 14 Changes to Equations 2 and 3 0 nveeeneeeereveeeneeeeneeeenerreeen nene n eeees 14 15 Updated OUTLINE DIMENSIONS otre bbe Ay dA HORE ee dedu eati e Redes a t na Rasta Heb beaten d 16 ww BDI C com AD REV D 17 ww BOM C conf AL ww BOM C conf AL ww BDI C conf AD
20. OP R 14 RM 8 Dimensions shown in millimeters and inches Dimensions shown in millimeters 8 75 0 3445 8 55 0 3366 4 00 0 1575 Ui 3 0 3 80 0 1496 1 7 0 2288 4 9 Wu BSC D Zei tai o 0 1 27 0 0500 1 75 0 0689 0 50 0 0197 x 45 0 25 0 0098 BSC 1 35 0 0531 gt F 0 25 0 0098 0 10 0 0039 n Y ot s ile COPLANARITY 221 0 0201 SEATING 0 25 0 0098 1 27 0 0500 0 15 1 10 MAX 0 10 0 31 0 0122 0 17 0 0067 0 40 0 0157 0 00 y T Kee 3 di 8 Ge ee COMPLIANT TO JEDEC STANDARDS MS 012AB a e 0 23 y o e n CONTROLLING DIMENSIONS ARE IN MILLIMETERS INCH DIMENSIONS l 0 08 IN PARENTHESES ARE ROUNDED OFF MILLIMETER EQUIVALENTS FOR COPLANARITY SEATING REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN 0 10 PLANE COMPLIANT TO JEDEC STANDARDS MO 187AA 8 Lead Standard Small Outline Package SOIC R 8 Dimensions shown in millimeters and inches 5 00 0 1968 MS CR 8 5 4 00 0 1574 6 20 0 2440 3 80 0 1497 jj a 5 80 0 2284 y Ho d 1 27 0 0500 0 50 0 0196 4 BSC 1 75 0 0688 Y 0 25 0 0099 0 25 0 0098 1 35 0 0532 0 10 0 0040 Y LAS ll 2 51 0 0201 KEE le COPLANARITY 531 0 0122 0 25 0 0098 0 1 27 0 0500 SEATING 0 31 0 0122 LLL 0 10 517 00067 0 40 0 0157 PLANE 0 17 0 0067 COMPLIANT TO JEDEC STANDARDS MS 012AA CONTROLLING DIMENSIONS ARE IN MILLIMETERS INCH DIMENSIONS IN PARENTHESES ARE ROUNDED OFF MILLIMETER EGUIVALENTS FOR REFER
21. RR Vs 2 7 V to 5 5 V 67 80 56 72 dB Supply Current Amplifier Isy Vo 0V 680 1 000 680 1 000 UA 40 C lt Ta lt 125 C 1 300 1 300 uA DYNAMIC PERFORMANCE Slew Rate SR Ry 2 kQ 5 2 5 2 V us Settling Time ts To 0 01 0 5 0 5 us Gain Bandwidth Product GBP 8 2 8 2 MHz Phase Margin Do 50 50 Degrees NOISE PERFORMANCE Voltage Noise Density En f 1 kHz 33 33 nV VHz e f 10 kHz 18 18 nV VHz Current Noise Density i 0 05 0 05 pA VHz For Vcm between 1 3 V and 1 8 V Vos may exceed specified value Specifications subject to change without notice 2 REV D AD8601 AD8602 AD8604 ELEGTRIGAL CHARACTERISTICS Vs 5 0 V Vem Vs 2 Ta 25 C unless otherwise noted A Grade D Grade Parameter Symbol Conditions Min Typ Max Min Typ Max Unit INPUT CHARACTERISTICS Offset Voltage AD8601 AD8602 Vos OV lt Vem lt 5 V 80 500 1 300 6 000 uV 40 C lt TA 125 C 1 300 7 000 UV Offset Voltage AD8604 Vos Vcm 70V to5 V 80 600 1 200 6 000 uV 40 C lt TA lt 125 C 1 700 7 000 UV Input Bias Current Ig 0 2 60 0 2 200 pA 40 C lt Ta lt 85 C 100 200 pA 40 C lt Ta lt 125 C 1 000 1 000 pA Input Offset Current Ios 0 1 30 0 1 100 pA 40 C lt Ta 85 C 6 50 6 100 pA 40 C lt Ta 125 C 25 500 25 500 pA Input Voltage Range 0 5 0 5 V Common Mode Rejection Ratio CMRR Vem 70V to5 V 74 89 56 67 dB Large Signal Voltage Gain Avo Vo 0 5 V to 4 5 V 30 80 20 60 V mV
22. ail at both the input and output enables designers to buffer CMOS ADCs DACs ASICs and other wide output swing devices in single supply systems REV D Information furnished by Analog Devices is believed to be accurate and reliable However no responsibility is assumed by Analog Devices for its use nor for any infringements of patents or other rights of third parties that may result from its use No license is granted by implication or otherwise under any patent or patent rights of Analog Devices Trademarks and registered trademarks are the property of their respective owners FUNCTIONAL BLOCK DIAGRAM 14 Lead TSSOP RU Suffix 5 Lead SOT 23 RT Suffix Lead MSOP RM Suffix The AD8601 AD8602 and AD8604 are specified over the extended industrial 40 C to 125 C temperature range The AD8601 single is available in the tiny 5 lead SOT 23 package The AD8602 dual is available in 8 lead MSOP and narrow SOIC surface mount packages The AD8604 quad is available in 14 lead TSSOP and narrow SOIC packages SOT MSOP and TSSOP versions are available in tape and reel only One Technology Way P O Box 9106 Norwood MA 02062 9106 U S A Tel 781 329 4700 www analog com Fax 781 326 8703 2003 Analog Devices Inc All rights reserved AD8601 AD8602 AD8604 SPECIFICATIONS ELECTRICAL CHARACTERISTICS Vs 3 V Vem Vs 2 Ta 25 C unless otherwise noted A Grade
23. e The 4 7 MQ resistor converts this current into a voltage with the output of the AD8601 increasing at 4 7 V UA The feedback capacitor reduces excess noise at higher frequencies by limiting the bandwidth of the circuit to 1 BW 43 MAG 1 Using a 10 pF feedback capacitor limits the bandwidth to approxi mately 3 3 kHz 14 10pF OPTIONAL 4 7M0 D1 Vour A7VipA A AD8601 Figure 3 Amplifier Photodiode Circuit High and Low Side Precision Current Monitoring Because of its low input bias current and low offset voltage the AD860x can be used for precision current monitoring The true rail to rail input feature of the AD860x allows the amplifier to monitor current on either high side or low side Using both amplifiers in an AD8602 provides a simple method for monitoring both current supplv and return paths for load or fault detec tion Figures 4 and 5 demonstrate both circuits MONITOR O OUTPUT 12 AD8602 or RSENSE IL 0 10 gt 3v V 2N3905 MONITOR OUTPUT Figure 5 A High Side Current Monitor Voltage drop is created across the 0 1 Q resistor that is propor tional to the load current This voltage appears at the inverting input of the amplifier due to the feedback correction around the op amp This creates a current through R1 which in turn pulls current through R2 For the low side monitor the monitor output voltage is given by Monitor Output 3V e x Sia x 2 REV D AD8601 AD8602
24. tes how the AD8601 can be used as an output buffer for the DAC for driving heavy resistive loads The AD5320 is a 12 bit D A converter that can be used with clock frequen cies up to 30 MHz and signal frequencies up to 930 kHz The rail to rail output of the AD8601 allows it to swing within 100 mV of the positive supply rail while sourcing 1 mA of current The total current drawn from the circuit is less than 1 mA or 3 mW from a 3 V single supply 3v Vour OV TO 3 0V TTTI AD8601 in v 3 WIRE SERIAL INTERFACE Figure 7 Using the AD8601 as a DAC Output Buffer to Drive Heavv Loads REV D The AD8601 AD7476 and AD5320 are all available in space saving SOT 23 packages PC100 Compliance for Computer Audio Applications Because of its low distortion and rail to rail input and output the AD860x is an excellent choice for low cost single supply audio applications ranging from microphone amplification to line output buffering TPC 34 shows the total harmonic distor tion plus noise THD N figures for the AD860x In unity gain the amplifier has a typical THD N of 0 004 or 86 dB even with a load resistance of 600 2 This is compliant with the PC100 specification requirements for audio in both portable and desktop computers Figure 8 shows how an AD8602 can be interfaced with an AC 97 codec to drive the line output Here the AD8602 is used as a unity gain buffer from the left and right outputs of the AC 97 codec
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ANALOG DEVICES AD8601/AD8602/AD8604 handbook