PHILIPS 8-Bit high-speed multiplying D/A converter DAC08 Series handbook
Contents
1. Output Current vs Output Voltage True and Complementary Output Output Voltage Compliance Fast Pulsed Reference Operation Operation ALL BITS ON 3 2 5 TA Tmin TO Tmax ur ad omA lout 24 VIN IOUT E V 2 15V V 5V IREp 2mA E 0 5V 2 0 1 0mA f 16 0 5mA 9 louT o IREF 1mA E 12 REF m 2 5mA 2 0mA IOUT o8 2 o 0 4 IREF 0 2mA Paa emranusen usn erem 00000000 11111111 o Tes 14 10 6 202 6 10 14 18 200ns division OUTPUT VOLTAGE V REQ 2000 R 1000 CC 0 T Full Scale Current vs Full Scale Settling Time LSB Switching Reference Current ALL BITS SWITCHED ON 5 0 BET FOR H Ki Tmin TO Tmax y_ 15v ALL BITS HIGH 2 4V Bits 24V E 4 0 WA 0 4V tc OUTPUT 1 2LSB je 3 3 0 0 SETTLING 1 2LSB 84A 5 LIMIT FOR IOUT d E 2 0 V 5V o I tp 10 a 50ns DIVISIOM 50ns DIVISIOM d IFS 2mA RL 1kO 1 2LSB 4pA2. Reference AMP Common Mode Range All Bits On Logic Input Current vs Input Voltage VtH Vic vs Temperature 3 2 a S TA MIN o TMAX gee M 32 1 8 lt x 24 16 E V 2 15V V 5V V 5V 5 6 0 S44 Z 2 0 u 12 2 IREE 2mA E Be 2 3 4 0 1 1 0 O12 E Jos 5 amp 50 6 g 0 8 IREF 1mA Z 20 92 2 l 0 2mA o 3 04 REF m e 0 2 och i 1 i f i i i o 0 0 14 10 6 202 6 10 14 18 12 8 4 0 4 8 12 16 50 0 50 100 150 V45 REFERENCE COMMON MODE VOLTAGE V LOGIC INPUT VOLTAGE V TEMPERATURE C POSITIVE COMMON MODE RANGE IS ALWAYS V 1 5V Output Voltage Compliance Bit Transfer Characteristics Power Supply Current vs V vs Temperature 20 14 12 T 8 T T T T T T T 16 P ALL BITS HIGH OR LOW lt IREF 2 0mA By ET L 12 E 19 amp W Shaded area indicates 5 x 6 B 8 permissible output voltage W og 2 5 d range for V 15V IREF 2 0mA gt 4 gt 4 For other V or IREF o6 a 5 5 B a 3 A LLI z 0 See Output Current vs Output a o Hx E Voltage curve on previous page 5 T 2 O 4 o B3 zod o B4 o o 8 M 50 0 50 100 150 B5 V POSITIVE POWER SUPPLY Vpc 12 12 8 4 0 4 8 12 16 50 0 50 100 150 LOGIC INPUT VOLTAGE V TEMPERATURE C NOTES B4 through Bg have identical transfer characteristics Bits are fully switched with less than 1 2LSB error at le
3. Logic input levels Low V High Logic input current Vic 0V Low Vin 10V to 0 8V 2 0 10 uA lH High Vin 2 0V to 18V 0 002 10 vs Loseinputswing Ve fo ef Ving Logic ieshoid range vev fo e s Reference bias curent ooo L LCS LESS TO alid Reference input sew rats O fof 59 f Power supply sensitivity Ingp 1mA PSSlrs Positive V 4 5 to 5 5V V 15V 0 0003 0 01 V 13 5 to 16 5V V 15V FS VS PSles Negative V 4 5 to 5 5V V 15V 0 002 0 01 V 13 5 to 16 5 V 15V Power supply current Positive Vs t5V IRer 1 0mMA Negative Positive Negative Vs 5V 15V Ingp 2 0mA Positive zt Negative Vs 15V IREF 2 0MA 5V IREF 1 0MA Power dissipation 5V 15V IREF 2 0MA 15V IREF 2 0MA ViL VIH l l l l l l August 31 1994 719 Philips Semiconductors Linear Products 8 Bit high speed multiplying D A converter AC ELECTRICAL CHARACTERISTICS DACOS8C SYMBOL PARAMETER TEST CONDITIONS To 1 2LSB all bits ts Settling time switched on or off Ta 25 C Product specification DACOS8 Series DACO8E DACO8H DACO8 DACO8A Propagation delay tPLH Low to High TA 25 C each bit tPuL High to Low All bits switched TEST CIRCUITS ns 35 35 REFERENCE DAC ACCURACY gt 0 006 Figure 1 Relative Accuracy Test Circuit Rf o ERROR OUTPUT M O uF L FOR SETTLING TIME MEASUREME
4. 0 1 0 2 0 3 0 40 50 IREF REFERENCE CURRENT mA LSB Propagation Delay vs IFS Reference Input Frequency Response 500 6 a 4 x 400 a 2 m E B 300 a 2 fe o 4 1 2 lt 200 w 6 R14 R15 1ko EB 1LSB 7 8u amp amp 9 R 5000 3 2 100 B 10t ALL BITS ON o LL 1LSB 78nA y 12 L VR15 0V LEAH d alLLl woa Bun a s OO 01 0 2 05 10 20 50 10 ooo O zt QUEE Er Mr E FREQUENCY MHz IFs OUTPUT FULL SCALE CURRENT mA NOTES Curve 1 CC 15pF VIN 2 0Vp p centered at 1 0V Curve 1 CC 15pF VIN 5mOVp p centered at 200mV Curve 1 CC 15pF ViN 100mOVp p centered at OV and applied through 50Q connected to Pin 14 2 0V applied to R44 August 31 1994 722 Philips Semiconductors Linear Products Product specification 8 Bit high speed multiplying D A converter DACOS Series TYPICAL PERFORMANCE CHARACTERISTICS Continued
5. 0V V 12V Logic input levels Low High Logic input current Vic 0V Low Vin 10V to 0 8V 2 0 10 2 0 li High Vin 2 0V to 18V 0 002 10 0 002 Power supply sensitivity IREF 1MA PSSlrs Positive V 4 5 to 5 5V V 15V 0 0003 0 01 V 13 5 to 16 5V V 15V FS VS PSles Negative V 4 5 to 5 5V V 15V 0 002 0 01 V 13 5 to 16 5 V 15V I cle gt 4 S e Ol 3 T Power supply current Positive l Negative l Positive 3 1 3 8 l Gui i Luca WIESE Positive 3 2 3 8 Negative fun 2 TEA ME 5V IReF 1 0MA 37 48 Power dissipation 45V 15V IREF 2 0MA 122 136 136 15V Iggp 2 0mA 156 174 174 T Vs t5V IReF 1 0MA Vit VIH Vs Vr is i ALN OLN oO ao 0 o August 31 1994 718 Philips Semiconductors Linear Products Product specification 8 Bit high speed multiplying D A converter DACOS Series DC ELECTRICAL CHARACTERISTICS Continued Pin 3 must be at least 3V more negative than the potential to which R15 is returned Voc 15V Inge 2 0mA Output characteristics refer to both lour and lour unless otherwise noted DACO8C E H TA 0 C to 70 C DACO8 08A Ta 55 C to 125 C Resolution Relative accuracy Over temperature range Dmeemay Tos Fms OCS Voc du v E neg 10 000 Rra P1525000 pss Fulscale summer kg E pe R44 Ry5 5 000kQ IEsR Full scale output current range Vrer t15 0V V 10V 2 1 mA Vngr 425 0V V 12V 4 2
6. MENDED FULL SCALE AND ZERO SCALE ADJUST Product specification DACOS8 Series VREF Oo m m o DAC 08 R4 1MQ V o Mn o V Rg 20kQ NOTES R4 low T C R3 R41 R2 R2 0 1 R4 to minimize pot contribution to full scale drift UNIPOLAR VOLTAGE OUTPUT FOR LOW IMPEDANCE OUTPUT 5kQ LOW T C DAC 08 o VOUT 0 TO 10V August 31 1994 726 Philips Semiconductors Linear Products 8 Bit high speed multiplying D A converter UNIPOLAR VOLTAGE OUTPUT FOR HIGH IMPEDANCE OUTPUT Product specification DACOS8 Series IR 2mA R IR 2mA R gt a Positive Output a Negative Output DAC 08 DAC 08 V 10V 5KQ 5KQ VOUT VOUT VOUT hd A hd AN i E VOUT BASIC BIPOLAR OUTPUT OPERATION OFFSET BINARY DAC 08 VOUT Bi B2 B3 B4 B5 B B7 Bg Vout Vout Positive full scale 1 1 1 1 1 1 1 1 9 920V 10 000 Positive FS 1LSB 1 1 1 1 1 1 1 0 9 840V 9 920 Zero scale 1LSB 1 0 0 0 0 0 0 1 0 080V 0 160 Zero scale 1 0 0 0 0 0 0 0 0 000 0 080 Zero scale 1LSB 0 1 1 1 1 1 1 1 0 080 0 000 Negative full scale 1LSB 0 0 0 0 0 0 0 1 9 920 9 840 Negative full scale 0 0 0 0 0 0 0 0 410 000 9 920 August 31 1994 727 Copyright Each Manufacturing Company All Datasheets cannot be modified without permiss
7. NT eo ALL BITS SWITCHED LOW TO HIGH CQ lt 25pF Figure 2 Transient Response and Settling Time 24v 14V e IN ay T PHL PLH 10NS USE Ry to GND p FOR TURN OFF SETTLING TIME MEASUREMENT RL 5000 0 tg 70ns TYPICAL TO 1 2 LSB TRANSIENT 9 Rp 500 RESPONSE Am PIN 4 TO GND tPHL August 31 1994 720 Philips Semiconductors Linear Products 8 Bit high speed multiplying D A converter TEST CIRCUITS Continued Product specification DACOS8 Series Vcc 2V NOTES See text for values of C Typical values of R14 R15 1k VREF 2 0V C 15pF Vj and apply to inputs A4 through Ag RIN y e IN REQ 2000 Rp WW zit 10 0 SCOPE di dV 90 RL d Ry at 2 0mA SLEWING TIME VEE z B Figure 3 Reference Current Slew Rate Measurement VREF cl DIGITAL INPUTS Vo OUTPUT RL The resistor tied to Pin 15 is to temperature compensate the bias current and may not be necessary for all applications and AN 1 if AN is at High Level AN 0 if AN is at Low Level At Ap Ag Ag Ag i A lo Ka 7 e 746 32 64 Tos B56 VREF where K g 14 Figure 4 Notation Definitions August 31 1994 721 Philips Semiconductors Linear Products Product specification 8 Bit high speed multiplying D A converter DACOS Series TYPICAL PERFORMANCE CHARACTERISTICS
8. Philip berniaoedl this Linear Products Product specification 8 Bit high speed multiplying D A converter DACOS Series DESCRIPTION The DACOS series of 8 bit monolithic multiplying Digital to Analog Converters provide very high speed performance coupled with low cost and outstanding applications flexibility Advanced circuit design achieves 70ns settling times with very low glitch and at low power consumption Monotonic multiplying performance is attained over a wide 20 to 1 reference current range Matching to within 1 LSB between reference and full scale currents eliminates the need for full scale trimming in most applications Direct interface to all popular logic families with full noise immunity is provided by the high swing adjustable threshold logic inputs Dual complementary outputs are provided increasing versatility and enabling differential operation to effectively double the peak to peak output swing True high voltage compliance outputs allow direct output voltage conversion and eliminate output op amps in many applications All DACO08 series models guarantee full 8 bit monotonicity and linearities as tight as 0 1 over the entire operating temperature range Device performance is essentially unchanged over the 4 5V to 18V power supply range with 37mW power consumption attainable at t5V supplies The compact size and low power consumption make the DACO8 attractive for portable and military aerospace applicati
9. S 75 lout NETWORK 1 5 CURRENT PIE 14 SWITCHES 2 OUT VREF V REF Ge REFERENCE AMPLIFIER ABSOLUTE MAXIMUM RATINGS WsVi2____ Diatalinputvotage a S Mic Legieihreshold conti OR S 50 Vie Vis Reference ampiiieringuis S veeo A Maximum power dissipation TA 25 C still air F package mW N package mW D package mW Tsoco TsoLp Lead soldering temperature 10sec max T Operating temperature range DACO8 DACO8A 55 to 4125 DACO8C E H 0 to 70 NOTES 1 Derate above 25 C at the following rates F package at 9 5mW C N package at 11 6mW C D package at 8 7mW C August 31 1994 717 Philips Semiconductors Linear Products Product specification 8 Bit high speed multiplying D A converter DACOS Series DC ELECTRICAL CHARACTERISTICS Pin 3 must be at least 3V more negative than the potential to which R45 is returned Voc 15V IREF 2 0mA Output characteristics refer to both lout and lour unless otherwise noted DACO8C E H Ta 0 C to 70 C DAC08 08A Ta 55 C to 125 C SYMBOL PARAMETER Resolution Monotonicity Relative accuracy Differential non linearity TCles Full scale tempco Voc Output voltage compliance Izs I 3 gt lesa Full scale current less Full scale symmetry lesa leso Zero scale current Se R44 R15 5 000kQ IEsR Full scale output current Vrer t15 0V V 10V range Vrer 25
10. ent may drift with temperature causing a change in the absolute accuracy of output current However the DACOS series has a very low full scale current drift over the operating temperature range The DACOS series is guaranteed accurate to within LSB at 25 C at a full scale output current of 1 992mA The relative accuracy test circuit is shown in Figure 1 The 12 bit converter is calibrated to a full scale output current of 1 99219mA then the DACOS full scale current is trimmed to the same value with R44 so that a zero value appears at the error amplifier output The counter is activated and the error band may be displayed on the oscilloscope detected by comparators or stored in a peak detector Two 8 bit D to A converters may not be used to construct a 16 bit accurate D to A converter 16 bit accuracy implies a total of part in 65 536 or 0 00076 which is much more accurate than the 0 19 specification of the DACOS8 series Monotonicity A monotonic converter is one which always provides analog output greater than or equal to the preceding value for a corresponding increment in the digital input code The DACOSG series is monotonic for all values of reference current above 0 5mA The recommended range for operation is a DC reference current between 0 5mA and 4 0mA Settling Time The worst case switching condition occurs when all bits are switched on which corresponds to a low to high transition for all input bits This time is
11. ion This datasheet has been download from www AllDataSheet com 100 Free DataSheet Search Site Free Download No Register Fast Search System www AllDataSheet com
12. ons FEATURES 9 Fast settling output current 70ns Full scale current prematched to 1 LSB 9 Direct interface to TTL CMOS ECL HTL PMOS Relative accuracy to 0 1 maximum over temperature range High output compliance 10V to 18V True and complemented outputs Wide range multiplying capability 9 ow FS current drift 10ppm C Wide power supply range 4 5V to 18V 9 ow power consumption 37mW at 5V APPLICATIONS 9 8 bit 1us A to D converters 9 Servo motor and pen drivers August 31 1994 716 PIN CONFIGURATIONS F N Packages VLC COMP lo VREF v VREF lo V B4 MSB Bg LSB B2 B7 B3 Bg B4 B5 TOP VIEW D Package V Bg LSB VREF B7 Bg B5 VREF COMPEN VLC B4 B3 B2 B4 MSB TOP VIEW NOTE 1 SO and non standard pinouts Waveform generators Audio encoders and attenuators Analog meter drivers Programmable power supplies CRT display drivers High speed modems Other applications where low cost high speed and complete in put output versatility are required Programmable gain and attenuation Analog Digital multiplication 853 0045 13721 Philips Semiconductors Linear Products Product specification 8 Bit high speed multiplying D A converter DACOS Series ORDERING INFORMATION DESCRIPTION TEMPERATURE RANGE ORDERCODE owes BLOCK DIAGRAM 4 BIA
13. ss than 100mV from actual threshold These switching points are guaranteed to lie between 0 8 and 2 0V over the operating temperature range VLC 0 0V Maximum Reference Input Frequency vs Compensation Capacitor Value Power Supply Current vs V Power Supply Current vs Temperature 10 000 t 9 BITS MAY BE HIGH OR LOW Te ARA EERE LI TUIS x BITS MAY BE HIGH OR LOW a a REE 5 V T5V l m hd 6 wi hc es 1 000 E Rs F 2 5 I WITH IREF 1mA 25 IREF 2 0mA o P ee De o ix 24 t gt x z I WITH IREF 0 2mA ae E 5 3 35 rTrmrr1 us o V 15V l 100 oc 2 2 ui l oc Lu Z o4 4 o o 00 40 80 12 16 20 o V NEGATIVE POWER SUPPLY VpC PE S uae cra 10 TEMPERATURE C 1 10 100 1000 Cc pF August 31 1994 723 Philips Semiconductors Linear Products 8 Bit high speed multiplying D A converter TYPICAL APPLICATION VREF OPTIONAL RESISTOR FFSET FOR O INPUTS gt gt 4 e ov 4 L9 NOTES REQ Rin I Rp Typical Values RIN 5kQ VIN 10V Pulsed Referenced Operation FUNCTIONAL DESCRIPTION Reference Amplifier Drive and Compensation The reference amplifier input current must always flow into Pin 14 regardless of the setup method or reference supply voltage polarity Connections for a positive reference voltage are shown in Figure 1 The reference voltage source supplies the full reference current For bipolar reference signals as in the mul
14. tiplying mode R45 can be tied to a negative voltage corresponding to the minimum input level R45 may be eliminated with only a small sacrifice in accuracy and temperature drift The compensation capacitor value must be increased as R44 value is increased This is in order to maintain proper phase margin For R44 values of 1 0 2 5 and 5 0kO minimum capacitor values are 15 37 and 75pF respectively The capacitor may be tied to either Vee or ground but using Veg increases negative supply rejection Fluctuations in the negative supply have more effect on accuracy than do any changes in the positive supply A negative reference voltage may be used if R44 is grounded and the reference voltage is applied to R45 as shown A high input impedance is the main advantage of this method The negative reference voltage must be at least 3 0V above the Veg supply Bipolar input signals may be handled by connecting R44 to a positive reference voltage equal to the peak positive input level at Pin 15 When using a DC reference voltage capacitive bypass to ground is recommended The 5 0V logic supply is not recommended as a reference voltage but if a well regulated 5 0V supply which drives logic is to be used as the reference R44 should be formed of two series resistors with the junction of the two resistors bypassed with 0 1uF to ground For reference voltages greater than 5 0V a clamp diode is recommended between Pin 14 and ground If Pin 14 is dri
15. typically 70ns for settling to within LSB for 8 bit accuracy This time applies when Rj 5000 and Co 25pF The slowest single switch is the least significant bit which typically turns on and settles in 65ns In applications where the DAC functions in a positive going ramp mode the worst case condition does not occur and settling times less than 70ns may be realized Extra care must be taken in board layout since this usually is the dominant factor in satisfactory test results when measuring settling time Short leads 100uF supply bypassing for low frequencies minimum scope lead length and avoidance of ground loops are all mandatory Philips Semiconductors Linear Products Product specification 8 Bit high speed multiplying D A converter DACOS Series SETTLING TIME AND PROPAGATION DELAY Vg 15V VIN e p VADJ Q4 Ri 100002 R2 10000 VOUT a AS 4 2 vor UV E b Z R3 2 5000 Do C4 he oT Vg 15V NOTES Dy Do IN6263 or equivalent D3 IN914 or equivalent C4 2 0 01uF Co C3 O 1uF Q4 2N3904 C4 C5 15pF and includes all probe and fixturing capacitance BASIC DAC08 CONFIGURATION 5 6 7 8 9 10 11 12 lt LOW T C DAC 08 NOTES VREF 255 Ipse 256 js lA I 1 for all logic states RREF Oo Oo FS August 31 1994 725 Philips Semiconductors Linear Products 8 Bit high speed multiplying D A converter RECOM
16. ven by a high impedance such as a transistor current Source none of the above compensation methods applies and the amplifier must be heavily compensated decreasing the overall bandwidth Output Voltage Range The voltage at Pin 4 must always be at least 4 5V more positive than the voltage of the negative supply Pin 3 when the reference current August 31 1994 Product specification DACOS8 Series is 2mA or less and at least 8V more positive than the negative supply when the reference current is between 2mA and 4mA This is necessary to avoid saturation of the output transistors which would cause serious accuracy degradation Output Current Range Any time the full scale current exceeds 2mA the negative supply must be at least 8V more negative than the output voltage This is due to the increased internal voltage drops between the negative supply and the outputs with higher reference currents Accuracy Absolute accuracy is the measure of each output current level with respect to its intended value and is dependent upon relative accuracy full scale accuracy and full scale current drift Relative accuracy is the measure of each output current level as a fraction of the full scale current after zero scale current has been nulled out The relative accuracy of the DACOSG series is essentially constant over the operating temperature range due to the excellent temperature tracking of the monolithic resistor ladder The reference curr
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PHILIPS 8 Bit high speed multiplying D/A converter DAC08 Series handbook