ADS-117 12-Bit, 2MHz, Low-Power Sampling A/D Converters PRODUCT OVERVIEW DATEL's ADS-117 is a functionally complete, Total harmonic distortion (THD) and signal- 12-bit, 2MHz, sampling A/D converter. Its stan- to-noise ratio (including distortion) typically run dard, 24-pin, double-width DIP contains a fast- –78dB and 70dB, respectively, with full scale settling sample-hold amplifi er, a 12-bit subranging inputs up to 100kHz. The ADS-117 requires ±15V (two-step) A/D converter, a precision reference, and +5V power supplies and typically consumes three-state output register and all the timing and 1.6 Watts. Models are available for use in either control logic necessary to operate from a single commercial (0 to +70°C) or military (–55 to start convert pulse. Digital input and output levels +125°C) operating temperature ranges and are TTL. extended commerical (–40 to +85°C). FEATURES INPUT/OUTPUT CONNECTIONS PIN FUNCTION PIN FUNCTION „ 12-bit resolution 1 BIT 12 (LSB) 24 –15V Supply „ No missing codes 2 BIT 11 23 ANALOG GROUND „ 3 BIT 10 22 +15V SUPPLY 2MHz minimum throughput 4 BIT 9 21 +10V REFERENCE „ Functionally complete 5 BIT 8 20 BIPOLAR „ Small 24-pin DDIP 6 BIT 7 19 ANALOG INPUT 7 BIT 6 18 COMP BIN „ Low-power, 1.6 Watts 8 BIT 5 17 ENABLE (1-12) „ Three-state output buffers 9 BIT 4 16 START CONVERT „ Samples to Nyquist frequencies 10 BIT 3 15 EOC 11 BIT 2 14 DIGITAL GROUND 12 BIT 1 (MSB) 13 +5V SUPPLY BLOCK DIAGRAM 17 ENABLE (1-12) DAC 12 BIT 1 (MSB) REF +10V REF. 21 11 BIT 2 10 BIT 3 S2 9 BIT 4 FLASH 8 BIT 5 S/H ADC 7 BIT 6 S1 6 BIT 7 BUFFER 5 BIT 8 BIPOLAR 20 4 BIT 9 3 BIT 10 ANALOG INPUT 19 – 2 BIT 11 + 1 BIT 12 (LSB) COMP BIN 18 TIMING AND START CONVERT 16 CONTROL LOGIC EOC 15 13 14 22 23 24 +5V SUPPLY DIGITAL GROUND +15V SUPPLY ANALOG GROUND –15V SUPPLY Figure 1. ADS-117 Functional Block Diagram DATEL, Inc. 11 Cabot Boulevard, MansŢ eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com 25 Jun 2015 MDA_ADS-117.C01 Page 1 of 7 REGISTER REGISTER DIGITAL CORRECTION LOGIC 3-STATE OUTPUT REGISTER ADS-117 12-Bit, 2MHz, Low-Power Sampling A/D Converters ABSOLUTE MAXIMUM RATINGS DYNAMIC PERF. (cont) MIN. TYP. MAX. UNITS PARAMETERS LIMITS UNITS Input Bandwith (–3dB) +15V Supply (Pin 22) 0 to +16 Volts Small Signal (–20dB input) 8 10 — MHz –15V Supply (Pin 24) 0 to –16 Volts Large Signal (–0.5dB input) 7 9 — MHz +5V Supply (Pin 13) 0 to +6.0 Volts Feedthrough (1MHz) –72 –74 — dB Digital Inputs (Pin 16, 17, 18) –0.3 to +VDD +0.3 Volts SNR (wo/distortion, –0.5dB) Analog Input (Pin 19) –9 to +15 Volts dc to 100kHz Lead Temp. (10 seconds) +300 °C 0 to +70°C — 72 — dB –55 to +125°C / –45 to +85°C — 72 — dB 100kHz to 500kHz FUNCTIONAL SPECIFICATIONS 0 to +70°C 65 70 — dB (TA = +25°C, ±VCC = +15V, +VDD =+5V, 2MHz sampling rate, and a minimum 3 minute –55 to +125°C / –45 to +85°C 65 70 — dB warmup unless otherwise speciŢ ed.) 500kHz to 1MHz 0 to +70°C — 70 — dB ANALOG INPUTS MIN. TYP. MAX. UNITS –55 to +125°C / –45 to +85°C — 70 — dB Input Voltage Range ➀ SNR (and distort., –0.5dB) ➂ Bipolar — ±5 — Volts dc to 100kHz Unipolar — 0 to +10 — Volts 0 to +70°C — 70 — dB Input Impedence 4.5 5 — kΩ –55 to +125°C / –45 to +85°C — 69 — dB Input Capacitance — 6 15 pF 100kHz to 500kHz 0 to +70°C 64 70 — dB DIGITAL INPUTS –55 to +125°C / –45 to +85°C 62 69 — dB Logic Levels 500kHz to 1MHz Logic "1" +2.0 — — Volts 0 to +70°C — 69 — dB Logic "0" — — +0.8 Volts –55 to +125°C / –45 to +85°C — 69 — dB Logic Loading "1" — — +5 μA Two-tone Intermodulation Distortion Logic Loading "0" — — –600 μA (fin = 970kHz, 990kHz, PERFORMANCE fs = 2Mhz, –0.5dB) — –68 — dB Resolution 12 Bits Slew Rate — ±210 — V/μs No Missing Codes Effect. Aperture Delay Time — — 16 ns (12 Bits; fin = 1MHz) 0 to +70°C Overvoltage Recovery Time; 20% — — 500 ns Integral Non-Linearity S/H Acq. Time, (to ±0.01%) 0 to +70°C — ±1/2 ±3 LSB 0 to +70°C — 155 165 ns –55 to +125°C — ±1 ±4 LSB –55 to +125°C / –45 to +85°C — 165 190 ns Differential Non-Linearity Conversion Rate 2 — — MHz 0 to +70°C — ±1/2 ±0.95 LSB –55 to +125°C / –45 to +85°C — ±1 +1.5 LSB OUTPUTS Staight binary/Offset binary Full Scale Absolute Accuracy Output Coding Complementary binary (see Tech Note 1) Pin 18 High 0 to +70°C — ±0.13 ±0.44 %FSR Pin 18 Low Complementary offset binary –55 to +125°C / –45 to +85°C — ±0.25 ±0.73 %FSR Logic Level Unipolar/Bipolar Zero Error Logic "1" +2.4 — — Volts 0 to +70°C (see Tech Note 1) — ±0.07 ±0.38 %FSR Logic "0" — — +0.4 Volts –55 to +125°C / –45 to +85°C — ±0.22 ±0.73 %FSR Logic Loading "1" — — –160 μA Bipolar Offset Error Logic Loading "0" — — +6.4 mA 0 to +70°C (see Tech Note 1) — ±0.1 ±0.38 %FSR POWER REQUIREMENTS –55 to +125°C / –45 to +85°C — ±0.53 ±0.73 %FSR Power Supply Ranges ➃ Gain Error (see Tech Note 1) +15V Supply +14.25 +15.0 +15.75 Volts 0 to +70°C — ±0.1 ±0.38 % –15V Supply –14.25 –15.0 –15.75 Volts –55 to +125°C / –45 to +85°C — ±0.53 ±0.73 % +5V Supply +4.75 +5.0 +5.25 Volts Internal Reference Voltage Power Supply Current 0 to +70°C +9.97 +10.0 +10.03 Volts +15V Supply — +48 +64 mA –55 to +125°C / –45 to +85°C +9.95 — +10.05 Volts –15V Supply — –35 –50 mA External Current — — 1.5 mA +5V Supply — +75 +95 mA DYNAMIC PERFORMANCE Power Dissipation — 1.6 2.0 Watts Spurious Free Dynamic Range ( –0.5dB) ➁ Power Supply Rejection — — ±0.07 %FSR%V dc to 100kHz — –81 — dB 100kHz to 500kHz — –75 –70 dB 500kHz to 1MHz — –70 — dB ➂ Effective bits is equal to: Total Harm. Distort. (–0.5dB) dc to 100kHz — –78 — dB Full Scale Amplitude (SNR + Distortion) – 1.76 + 20 log 100kHz to 500kHz — –73 – 68 dB Actual Input Amplitude 500kHz to 1MHz — –71 — dB 6.02 ➀ See Table 1 also ➃ For ±12V, +5V operation, contact DATEL. ➁ Same specifi cations for in-band harmonics. DATEL, Inc. 11 Cabot Boulevard, MansŢ eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com 25 Jun 2015 MDA_ADS-117.C01 Page 2 of 7 ADS-117 12-Bit, 2MHz, Low-Power Sampling A/D Converters FUNCTIONAL SPECIFICATIONS. CONT. PHYSICAL/ENVIRONMENTAL Operating Temp. Range, Case ADS-117MC 0 — +70 °C ADS-117ME –45 — +85 °C ADS-117MM, 883 –55 — +125 °C Storage Temperature Range –65 — +150 °C Thermal Impedance θjc — 3 — °C/W θca — 23 — °C/W Package Type 24-pin, metal-sealed, ceramic DDIP Weight 0.42 ounces (12 grams) TECHNICAL NOTES 1. Applications which are unaffected by endpoint errors or remove them is compatible with CMOS/TTL logic levels for those users desiring through software will use the typical connections shown in Figure 3. dynamic control of this function. Do not change COMP BIN status while Remove system errors or adjust the small initial errors of the ADS-117 EOC is high. to zero using the optional external circuitry shown in Figure 4. The 5. To enable the three-state outputs, connect ENABLE (pin 17) to a logic external adjustment circuit has no effect on the throughput rate. "0" (low). To disable, connect pin 17 to a logic "1" (high). 2. Always connect the analog and digital grounds to a ground plane 6. To meet the guaranteed conversion rate, a maximum start convert pulse beneath the converter for best performance. The analog and digital is specifi ed. A wider start convert pulse will result in slower conversion grounds are not connected to each other internally. rates. An initial start convert pulse is required before performing an 3. Bypass the analog and digital supplies and the +10V reference (pin 21) actual conversion after power-up to assure the sample-hold is in the to ground with 4.7μF, 25V tantalum electrolytic capacitors in parallel acquisition mode. with 0.1μF ceramic capacitors. Bypass the +10V reference (pin 21) to Figure 2 shows the relationship between the various input signals. The ANALOG GROUND (pin 23). timing shown applies over the operating temperature range and over 4. Obtain straight binary/offset binary output coding by tying COMP BIN the operating power supply range. (pin 18) to +5V or leaving it open. The device has an internal pull-up 7. Re-initiating the START CONVERT (pin 16) while EOC is a logic "1" (high) resistor on this pin. To obtain complementary binary or complementary will result in a new conversion sequence. offset binary output coding, tie pin 18 to ground. The pin 18 signal NN+1 START CONVERT 50ns typ., 30ns min., 60ns max. 10ns min. Acquisition Time 25ns max. INTERNAL S/H 165ns typ. Hold 170ns max. 10ns min. 60ns max. 17ns max. Conversion Time EOC 325ns typ. 35ns max. OUTPUT DATA N-1 VALID DATA N VALID DATA INVALID INVALID 350ns min. DATA DATA 150ns max. Note: Scale is approximately 25ns per division. Figure 2. ADS-117 Timing Diagram DATEL, Inc. 11 Cabot Boulevard, MansŢ eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com 25 Jun 2015 MDA_ADS-117.C01 Page 3 of 7 ADS-117 12-Bit, 2MHz, Low-Power Sampling A/D Converters ➀ R2 CALIBRATION PROCEDURE 1. Connect the converter per Figure 3, Figure 4, and Table 1 for the ap- +15V ➀ propriate input range. Apply a pulse of 150 nanoseconds to the START R1 CONVERT input (pin 16) at a rate of 250kHz. This rate is chosen to SIGNAL To Pin19 reduce fl icker if LED’s are used on the outputs for calibration purposes. INPUT of ADS-117 5kΩ 2. Zero Adjustments 50Ω –15V GAIN Apply a precision voltage reference source between the amplifi er’s ADJUST analog input and ground. Adjust the output of the reference source per Table 2. For unipolar, adjust the zero trimming potentiometer so that 5kΩ 10kΩ the output code fl ickers equally between 0000 0000 0000 and 0000 ZERO/ 0000 0001 with the pin 18 tied high (straight binary) or between 1111 OFFSET ADJUST 1111 1111 and 1111 1111 1110 with the pin 18 tied low (complemen- tary binary). For values of R1 and R2 refer to Table 1. ➀ Figure 4. Optional Calibration Circuit For bipolar operation, adjust the potentiometer such that the code fl ick- ers equally between 1000 0000 0000 and 1000 0000 0001 with pin 18 tied high (offset binary) or between 0111 1111 1111 and 0111 1111 Table 1. Input Connections (using external calibration) 1110 with pin 18 tied low (complementary offset binary). INPUT RANGE R1 R2 UNIT 3. Full-Scale Adjustment 0 +10V, ±5 2 2 kΩ Set the output of the voltage reference used in step 2 to the value shown in Table 1. Adjust the gain trimming potentiometer so that the 0 to 5V, ±2.5V 2 6 kΩ output code fl ickers equally between 1111 1111 1110 and 1111 1111 0 to +2.5V, ±1.25V 2 14 kΩ 1111 for pin 18 tied high or between 0000 0000 0001 and 0000 0000 0000 for pin 18 tied low. Table 2. Zero and Gain Adjustments 4. To confi rm proper operation of the device, vary the precision reference ZERO ADJUST GAIN ADJUST voltage source to obtain the output coding listed in Table 3. INPUT RANGE +1/2 LSB RANGE 0 to +10V +1.22mV +9.9963V ±5V +1.22mV +4.9963V UNIPOLAR OPERATION 12 BIT 1 (MSB) 20 BIPOLAR INPUT 11 BIT 2 10 BIT 3 21 +10V REF. 9 BIT 4 + 8 BIT 5 0.1µF 4.7µF 7 BIT 6 6 BIT 7 5 BIT 8 –15V 24 4 BIT 9 ADS-117 4.7µF 3 BIT 10 0.1µF + 23 2 BIT 11 1 BIT 12 (LSB) 4.7µF 0.1µF + 15 EOC +15V 22 17 ENABLE (1-12) 16 START CONVERT 13 +5V + 19 ANALOG INPUT 4.7µF 0.1µF COMP BIN 18 +5V 14 NOTE: For unipolar operation, ground pin 20. For bipolar operation, connect pin 20 to pin 21. Always bypass pin 21 as shown for both unipolar and bipolar operation. Figure 3. ADS-117 Connection Diagram DATEL, Inc. 11 Cabot Boulevard, MansŢ eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com 25 Jun 2015 MDA_ADS-117.C01 Page 4 of 7 ADS-117 12-Bit, 2MHz, Low-Power Sampling A/D Converters Table 3. Output Coding STRAIGHT BIN. COMP. BINARY OUTPUT CODING UNIPOLAR INPUT RANGE INPUT RANGE BIPOLAR SCALE 0 to +10V ±5V SCALE MSB LSB MSB LSB +FS – 1 LSB +9.9976 1111 1111 1111 0000 0000 0000 +4.9976 +FS –1 LSB +7/8 FS +8.7500 1110 0000 0000 0001 1111 1111 +3.7500 +3/4FS +3/4 FS +7.5000 1100 0000 0000 0011 1111 1111 +2.5000 +1/2FS +1/2 FS +5.0000 1000 0000 0000 0111 1111 1111 0.0000 0 +1/4 FS +2.5000 0100 0000 0000 1011 1111 1111 –2.5000 –1/2FS +1/8 FS +1.2500 0010 0000 0000 1101 1111 1111 –3.7500 –3/4FS +1 LSB +0.0024 0000 0000 0001 1111 1111 1110 –4.9976 –FS+1LSB 0 0.0000 0000 0000 0000 1111 1111 1111 –5.0000 –FS OFF. BINARY COMP. OFF. BIN. 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 –130 –140 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Frequency (MHz) (fs = 2MHz, fin = 980kHz, Vin = –0.5dB, 4,096-point FFT) Figure 5. FFT Analysis of ADS-117 DATEL, Inc. 11 Cabot Boulevard, MansŢ eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com 25 Jun 2015 MDA_ADS-117.C01 Page 5 of 7 Amplitude Relative to Full Scale (dB) ADS-117 12-Bit, 2MHz, Low-Power Sampling A/D Converters MECHANICAL DIMENSIONS INCHES (mm) 1.31 MAX. TDIP PACKAGE (33.27) Dimension Tolerances (unless otherwise indicated): 2 place decimal (.XX) ±0.010 (±0.254) 3 place decimal (.XXX) ±0.005 (±0.127) 24 13 Lead Material: Kovar alloy 0.80 MAX. Lead Finish: 50 microinches (minimum) gold plating (20.32) over 100 microinches (nominal) nickel plating 112 0.100 TYP. (2.540) 1.100 (27.940) 0.235 MAX. (5.969) PIN 1 INDEX 0.200 MAX. (5.080) +0.002 0.010 –0.001 (0.254) 0.190 MAX. 0.100 0.100 (4.826) (2.540) (2.540) 0.600 ±0.010 SEATING (15.240) PLANE 0.040 0.018 ±0.002 0.025 (1.016) (0.457) (0.635) 1.31 MAX. (33.02) SMT PACKAGE Dimension Tolerances (unless otherwise indicated): 13 24 2 place decimal (.XX) ±0.010 (±0.254) 3 place decimal (.XXX) ±0.005 (±0.127) Lead Material: Kovar alloy 0.80 MAX. Lead Finish: 50 microinches (minimum) gold plating (20.32) over 100 microinches (nominal) nickel plating 1 12 0.020 TYP. 0.060 TYP. 0.015 (0.508) (1.524) 0.190 MAX. (0.381) (4.826) MAX. radius 0.130 TYP. PIN 1 for any pin (3.302) INDEX 0.100 (2.540) 0.020 0.010 TYP. (0.508) (0.254) 0.100 TYP. 0.040 (2.540) (1.016) DATEL, Inc. 11 Cabot Boulevard, MansŢ eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com 25 Jun 2015 MDA_ADS-117.C01 Page 6 of 7 ADS-117 12-Bit, 2MHz, Low-Power Sampling A/D Converters ORDERING GUIDE OPERATING MODEL NUMBER PACKAGE ROHS TEMPERATURE RANGE ADS-117MC 0 to +70°C TDIP No ADS-117MC-C 0 to +70°C TDIP Yes ADS-117ME -40to +100°C TDIP No ADS-117ME-C -40to +100°C TDIP Yes ADS-117MM -55to +125°C TDIP No ADS-117MM-C -55to +125°C TDIP Yes ADS-117/883 -55to +125°C TDIP No ADS-117-C/883 -55to +125°C TDIP Yes ADS-117GC 0 to +70°C SMT No ADS-117GC-C 0 to +70°C SMT Yes ADS-117GE -40to +100°C SMT No ADS-117GE-C -40to +100°C SMT Yes ADS-117GM -55to +125°C SMT No ADS-117GM-C -55to +125°C SMT Yes ADS-117G/883 -55to +125°C SMT No ADS-117G-C/883 -55to +125°C SMT Yes DATEL is a registered trademark of DATEL, Inc. DATEL, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of 11 Cabot Boulevard, MansŢ eld, MA 02048-1151 USA licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without notice. ITAR and ISO 9001/14001 REGISTERED © 2015 DATEL, Inc. www.datel.com • e-mail: help@datel.com 25 Jun 2015 MDA_ADS-117.C01 Page 7 of 7