TAC1020 and TAC1025 aa 7" Complete 10-Bit, 20 and 25 Msps Analog-To-Digital Converter Boards The TAC1020 and TAC1025 are A/D converter boards Applications complete with voltage reference, input amplifier, track/ . . hold, timing generator, and output registers. They are Medical Imaging Systems direct replacements for the Analog Devices MOD-1020 and = High Quality Video offer significant performance improvements while reducing Data Acquisition Systems power consumption by more than 50%. Based on TRWs TDC1020 10-bit flash A/D converter, the TAC1020 achieves a 20 Msps (Mega samples per second) conversion rate and the TAC1025 converts at 25 Msps. e Test Equipment Digital Communications Spectrum Analysis The TAC1020 has the exact timing and output Pin Assignments characteristics of the MOD-1020. The TAC1025 employs in Assig simple pipeline timing which results in a higher conversion Pin | Function Pin | Function rate. All outputs of the TAC 1020 are differential ECL a uae compatible and the output format is unsigned magnitude. 1 | GND 19 | Bits 2 | ENCODE 20 | Bit? Features 3 | ENCODE 21 | Bit? ; 4 | GND 22 | Bir Direct Replacement For MOD-1020 5 | Veg 23 | Bits 10-Bit Resolution 6 | N/C (See note 1.) 24 | Bits * 20 Msps Conversion Rate For TAC1020 7 | NC (See note 1.) 25 | Bits 25 Msps Conversion Rate For TAC1025 5 aN 7 ata Only Two Power Supplies Required: +5 And 5.2 Volts 10 | Ang a8 | Bit3 Power Consumption Reduced By More Than 50% 1 | Vec 29 | Bits e Adjustable Input Range And Offset 12 | GND 30 | Bit2 @ 500 Or 1kQ Input Impedance q 3 101.88) io arr ASB) . t t Complete With Voltage Reference And Track/Hold Stage 15 | BirT0 (LSB) 33 | Bit 1 (MSB) Bandwidth Greater Than 6OMHz 16 | Bitg 34 | DR Differential ECL Input And Outputs 17) Bits 35 | GND 18 | Bits 36 | DR Note: 1. 415V supplies are not required with the TAC1020 and TAC1025. For compatibility with the MOD-1020, pins 6 and 7 may be connected to +15 and -15 Volts without damage. 19 TRW LSI Products Inc. Phone: (619) 457-1000 TRW Inc. 1980 P.O. Box 2472 FAX: (619) 455-6314 40G06054 Rev. A-8/90 La Jolla, CA 92038 Printed in the U.S.A.TAC1020 and TAC1025 rr Functional Block Diagram, TAC1020 LN Ln LN eS Tl cS REGISTER] REGISTER] REGISTER] > REGISTER To Dy-1004. /) md / ECL 1-10-10 ENCODE > TIMING -___-_-> DR ay GENERATOR +} DF NCODE > Functional Block Diagram, TAC1025 REFERENCE, AIN 3 KO ADJUST Toc1020 AINI 10-87 FN Mm a= ae a > rast } REGISTER ro Dy-1001-10 1KQ Ain2 OFFSET ENCODE > |}___-_________ pr TIMING GENERATOR ENCODE >- > Di 20 TRW LS! Products Inc.TAC1020 and TAC1025 TACs | Functional Description General Information The TAC1020 and TAC1025 are complete Analog-to-Digital converter beards that are based upon TRW's TDC1020 monolithic flash converter integrated circuit. A wideband input amplifier, track/hold, voltage reference, timing and output circuits are included on the beards te make the TAC1020 and TAC1025 complete and very easy to use. The TAC1020 is rated at 20 Msps and has been designed to match the timing and output characteristics of the MOD- 1020 board. The TAC1025 achieves 25 Msps by using a simplified pipeline data output design. Analog Inputs The analog input to the TAC1020 and TAC1025 has an equivalent circuit as shown in the Functional Block Diagram. Input impedances and voltage ranges are selected by using combinations of the two analog inputs, A\N1 and AIN2. A 1kQ input impedance with a 2 Volt peak-to-peak input range 1s available from either Aj or AIN2. A 500Q input impedance with a 1 Volt peak-to-peak input range Is achieved by connecting both input pins together. These inputs may also be used to sum two analog signals. The GAIN potentiometer affords a +25% adjustment to the input range. The analog input range is factory-adjusted for 40.5 Volts with input signals applied to Ajyyy and AlN? simultaneously. The OFFSET adjustment is factory- adjusted for 0.0 Volts. The OFFSET control has sufficient adjustment range to allow the board to be used with a unipolar input ranges of either polarity. The on-board reference voltages for the TAC1020 and TAC1025 are calibrated at the factory to optimize linearity. Fixed and variable resistors are used to set voltage levels. Changing these resistors is discouraged because AC and DC performance will degrade. TRW LS! Products Inc. Encode Command The ENCODE input to the TAC1020 and TAC1025 is differential 10K ECL-compatible with a 100Q input impedance between ENCODE and ENCODE (pins 2 and 3). The on-board track/hold goes into HOLD after the rising edge of ENCODE. In the TAC1020, the on-board timing generator then takes over the rest of the conversion cycle and data emerges from the outputs according to the Timing Diagram of the TAC1020. The TAC1025 is also controlled by the rising edge of ENCODE, but data progresses through the TAC1025 and emerges at its outputs synchronously with respect to ENCODE. The Timing Diagram of the TAC1025 shows the simple pipeline data flow. There are minimum pulse width requirements (tpyyH, tpyL) for the ENCODE signal for both TAC1020 and TAC1025. Outputs and Timing The outputs of the TAC1020 and TAC1025 are differential 10K ECL-compatibie, capable of driving 75 to 100Q loads connected from each data cutput to its complement. Data skew between bits is held to within 5 nanoseconds. The output data from the TAC10260 is valid at the falling edge of DR (pin 36). Data fram the TAC1025 is synchronous with respect to the rising edge of ENCODE. Power and Thermal Considerations The TAC1020 and TAC1025 operates from anly twe supply voltages, +5 and 5.2 Volts. The twa N/C terminals (pins 6 and 7) have no electrical connection to circuitry on the board. These pins are used for +15 and 15 Volt power supplies on the MOD-1020 board, but have no function on the TAC1020 and TAC1025. They may be connected to +15 Volt power supplies but no current will be drawn from the board. All power and ground pins must be connected. The TAC1020 and TAC1025 are rated for use at up ta 70C in stil] air. They may be used at temperatures up to 85C with 500 LFPM of moving air. 21TAC1020 and TAC1025 7 Itvy Board Interconnections Signal Signal Type Name Function Value Pin Power Vee +5 Volt Supply +5.0V "1 VEE ~.2 Volt Supply 5.2V 5 Ground GND Ground 0.0V 1,4,8,12,13,35 Inputs AIN1 Analog Input see text 9 AIN2 Analog Input see text 10 ENCODE Convert Clock ECL 2 ENCODE Convert Clack ECL 3 Outputs DR Data Ready ECL 36 DR Data Ready ECL 34 Bit i MSB ECL 33 Biti MSB ECL 32 Bit 2 ECL 30 Bit2 ECL 31 Bit 3 ECL 28 Bit3 ECL 29 Bit 4 ECL 27 Bit4 ECL 26 Bit 5 ECL 25 Bits ECL 24 Bit6 ECL 23 Bit ECL 22 Bit 7 ECL 20 Bit 7 ECL 21. Bit8 ECL 18 Bit 8 ECL 19 Bit 9 ECL 16 Bit9 ECL 17 Bit 10 LSB ECL 14 Bit 10 iSB ECL 15 NC Not Connected open 67 TRW LSI Products Inc.TAC1020 and TAC1025 menpnas Figure 1. Timing Diagram, TAC1020 1 tpwH pw Fs | TP SAMPLE SAMPLE SAMPLE N N+1 N+2 AN 4 S$ >? Gu | lwetgto | | | tno 7 <= o [\ J VIN sel tom be Figure 2. Timing Diagram, TAC1025 4 ~~ ssn anal | / SAMPLE SAMPLE conv/ SAMPLE N+1 N+2 | AN | 1 | > ae tsto | DATA DATA DATA D410 | N-2 N-1 N TRW LSI Products inc. 2TAC1020 and TAC1025 7 Imtvy Output Coding Table Dy eee Dio VIN MSB_ LSB >1.000 V ttt 1.000 V W40111111 0.998 V 1141111410 0.002 V 100000000 0.000 V ovata 0.002 V o1n1111110 ~0.998 V oo00000001 -1.000 V ooo0000000 Notes: 1. 2 Volt peak-to-peak input range, AjN1 or AiN2. 2. Voltages are at cade centers. Figure 3. ENCODE Input Equivalent Circuit ENCODE 4 100 ENCODE ha 5.11K 2V 24 Figure 4. Digital Output Equivalent Circuit Dy OUTPUT 510 10124 Dy OUTPUT TRW LSI Products inc.TAC1020 and TAC1025 aw Absolute maximum ratings (beyond which the board may be damaged)! Supply Voltages Vec.. -0.5 to +7.0V VEE +0.5 to -7.0V Input Voltages Vint VIN2 Vec to VEE ENCODE, ENCODE Vcc to VEE Digital Outputs Applied Voltage2 .. +0.5V to VEE Applied Currents ..... . .. OMA Short-circuit duration (single output to GND) ... 1sec Notes: 1. Absolute maximum ratings are limiting values applied individually while all other parameters are within specified operating conditions. Functional operation under any of these conditions is NOT implied. Device performance and reliability are guaranteed only if the Operating Conditions are not exceeded. 2. Applied voltage must be current limited to specified range. 3. Forcing voltage must be limited to specified range. 4. Current is specified as corventional current when flowing into the device. Operating conditions! Parameter Conditions Min Nom Max Unit Vcc Positive Supply Voltage 4.75 5.0 5.25 V VEE Negative Supply Voltage 5.0 6.2 6.5 V VIN Analog Input Voltage Range AIN1 = AIN2 40.5 V AIN1 or AIN2 H.0 V tpWL ENCODE Pulse Width, LOW 15 ns tPWH ENCODE Pulse Width, HIGH 10 ns ENCODE Signal Duty Cycle 70 % tRT ENCODE Pulse Rise Time 5 ns tFT ENCODE Pulse Fall Time 5 ns VIL Input Voltage, Logic LOW -7 V VIH Input Voltage, Logic HIGH -0.9 V RL Output Load Resistance Line-to-Line 75 Q Ta Ambient Temperature 0 70 C TRW LSI Products Inc. 23 ATAC1020 and TAC1025 a. Electrical characteristics! Parameter Conditions Min Typ Max Unit RIN Analog Input Resistance2 AIN1 = AIN2 495 500 505 Q AIN1 or AIN2 990 1000 1010 Q CIN Input Capacitance AIN1. AIN2 15 pF VoH Output Voltage, Lagic HIGH 75Q Line-to-Line -0.9 V VOL Output Voltage, Logic LOW 75Q Line-to-Line -17 V TAC1020 Ice Positive Supply Current2 800 1100 mA IEE Negative Supply Current2 750 1000 mA Pp Power Dissipation Vcc, VEE = Max 79 11.3W TAC1025 lec Positive Supply Current2 700 800 mA lEE Negative Supply Current2 825 900 mA Pp Power Dissipation Vcc. Vee = Max 78 9.2W Notes: 1. Unless otherwise specified, parameters are guaranteed for Ta = 0C to +70C, Voc = +5.0 Volts, VEE = 5.2 Volts. 2. Ta=25C only. 3. Factory potentiometer adjustment. Switching characteristics! Parameter Conditions Min Typ Max Unit tpo Data Output Delay Time2 CLoAD = 50pF 5 ns tR Digital Output Rise Time 5 ns tF Digital Output Fall Time 5 ns TAC1020 fs Maximum Conversion Rate Vec=Vee=Min 20 Msps tsTo Sampling Time Offset 3 5 7 ns tDRH Data Ready Pulse Width 20 Msps 22 25 28 ns TAC1025 fs Maximum Conversion Rate Vec=VEe=Min 25 Msps tsTO Sampling Time Offset 2 2.5 3 ns tDRH Data Ready Pulse Width 25 Msps V7 20 26 ns Notes: 1. Unless otherwise specified, parameters are guaranteed for Ta = 0C to +70C, Vcc = +5.0 Volts, VEE =5.2 Volts. 2. Ta = 25C only. 3. Factory potentiometer adjustment. 26 TRW LSI Products Inc.TAC1020 and TAC1025 a vw System performance characteristics! Parameter Conditions Min Nom Max Units LSB LSB Weight 1V Input Range 1 mV 2V Input Range 2 mV Etb Differential Linearity2 40.6 +H1.0 LSB ETc Linearity Tempco 5 ppm/C Eg Gain Error3 By %FS ATC Gain Tempco 150 ppm/c Vos Offset Voltage3 +15 mV TCOF Offset Tempco 100 ppm/C Eap Aperture Error 2 5 ps tTR Transient Response to .1%, FS step 20 ns tovR Overload Recovery to .1% 2xFS step 20 ns BW 3dB Input BW Fuil-Scale Input 60 MHz 40dBc Input 70 MHz TAC1020 SFDR Spurious Free Dynamic Range, fg = 20 Msps2 fin = 500kHz 64 68.9 dB fin = 5.0MHz 58 61.3 dB SINAD Signal-to-Noise and Distortion Ratio, fs = 20 Msps2 fin = S00KHz 55 58.1 dB fin = 5.0MHz 50 55.7 dB TAC1025 SFDR Spurious Free Dynamic Range, fg = 20 Msps2 fin = 500kHz 64 68.9 dB fi = 5.0MHz 53 60.7 dB fin = 10MHz 49 53.2 dB SINAD Signal-to-Noise and Distortion Ratio, fs = 20 Msps2 fin = 500kHz 55 58.2 dB fin = 5.0MHz 51 55.4 dB fIN = 10MHz 46 49.1 dB Notes: 1. Unless otherwise specified, parameters are guaranteed for Ta = 0C to +70C, Vcc = +5.0 Volts, Veg = 5.2 Volts. 2. Ta=25C only. 3. Factory potentiometer adjustment. TRW LSI Products Inc. 27TAC1020 and TAC1025 rd Figure 5. Mechanical Configuration COMPONENT AREA | 33 14 OQ OCOOODCODODNCOOOOCOCOON O 3.23 34 le as (115.3) ____, " a MAX _ i SIDE VIEW nose 002 14> sacha (1.016 + 0.05) (769 051) 0.2 (5.06) TO PIN 06152) son > ~ a 0215 (S06KTYF) > GO00000000 00 O 1 10 11 12 | s 8 7 oO hd z Sze s so 2 436 a O35 TOP VIEW 130 5 Ru OM x So = (5.34) TO HOLE CENTERLINES 8.25 >| 4.7 (119.4) (1.32) TO PIN CENTERLINES 5.0 (127) > 28 TRW LSI Products Inc.a TAC1020 and TAC1025 artwy Ordering Information Product Number Description Order Number TAC1020P3C 20 Msps A/D Converter Board TAC1020P3C TAC1025P3C 25 Msps A/D Converter Board TAC1025P3C All parameters in this specification are guaranteed by design, characterization, sample testing, or 100% testing, as appropriate. TRW reserves the right to make changes to products and specifications without notice. This information does not convey any license under patent rights of TRW LSI Products Inc., TRW inc., or others. Life Support Policy TRW LSI Products Inc. components are not designed for use in life support applications, wherein a failure or malfunction of the component can reasonably be expected to result in personal injury. The user of TRW LSI Products Inc. components in life support applications assumes all risk of such use and indemnifies TRW LSI Products Inc. and TAW inc. against all damages. TRW LSI Products Inc.