ADS-937 16-Bit, 1MHz Sampling A/D Converters GENERAL DESCRIPTION INPUT/OUTPUT CONNECTIONS PIN FUNCTION PIN FUNCTION The low-cost ADS-937 is a 16-bit, 1MHz sampling A/D converter. This device accurately samples full-scale input 1 ANALOG INPUT 32 BIT 1 (MSB) signals up to Nyquist frequencies with no missing codes. 2 GROUND 31 BIT 2 This feature, combined with excellent signal-to-noise ratio 3 UNIPOLAR 30 BIT 3 (SNR) and total harmonic distortion (THD), makes the ADS- 4 OFFSET ADJUST 29 BIT 4 937 the ideal choice for both time-domain (CCD/medical 5 +5V REFERENCE OUT 28 BIT 5 imaging, scanners, process control) and frequency-domain 6 GAIN ADJUST 27 BIT 6 (radar, telecommunications, spectrum analysis) applications. 7 COMPENSATION 26 BIT 7 FEATURES Packaged in a 32-pin, side-brazed, metal-sealed, ceramic 8 -15V SUPPLY 25 BIT 8 „ TDIP, the functionally complete ADS-937 contains a 16-bit resolution 9 +15V SUPPLY 24 BIT 9 fastsettling sample-hold amplifi er, a subranging (two-pass) „ 1MHz sampling rate 10 +5V SUPPLY 23 BIT 10 A/D converter, an internal reference, timing/control logic, 11 -5V SUPPLY 22 BIT 11 „ No missing codes over full HI-REL temperature and error correction circuitry. Digital input and output levels 12 GROUND 21 BIT 12 range are TTL. The ADS-937 only requires the rising edge of the 13 GROUND 20 BIT 13 start convert pulse to operate. „ Very low power, 1.25 Watts 14 +5V SUPPLY 19 BIT 14 Requiring ±15V and ±5V supplies, the ADS-937 typically „ Small, 32-pin, side-brazed ceramic TDIP 15 EOC 18 BIT 15 dissipates 1.25 Watts. The device is offered with both 16 START CONVERT 17 BIT 16 (LSB) „ Edge-triggered bipolar (±5V) and unipolar (0 to –10V) analog input ranges. Models are available in commercial (0 to +70°C), industrial „ Excellent performance (–40 to +100°C), or HI-REL (–55 to +125°C) operating „ Ideal for both time and frequency-domain temperature ranges. A proprietary, auto-calibrating, error- applications correcting circuit enables the device to achieve specifi ed performance over the full military temperature range. „ Low cost BLOCK DIAGRAM UNIPOLAR 3 OFFSET ADJUST 4 32 BIT 1 (MSB) BUFFER 31 BIT 2 ANALOG INPUT 1 – FLASH 30 BIT 3 S/H ADC + 29 B4 IT 1 28 BIT 5 27 BIT 6 26 BIT 7 GAIN GAIN ADJUST 6 REF 25 BIT 8 CIRCUIT DA AC 24 BIT 9 Σ +5V REFERENCE OUT 5 23 BIT 10 22 BIT 11 COMPENSATION 7 21 BIT 12 20 BIT 13 FLASH ADC 19 BIT 14 2 AMP 18 BIT 15 17 BIT 16 (LSB) START CONVERT 16 TIMING AND CONTROL LOGIC EOC 15 10 11 2, 12 14 9 8 13 +5V ANALOG –5V ANALOG ANALOG +5V DIGITAL +15V –15V DIGITAL SUPPLY SUPPLY GROUND SUPPLY SUPPLY SUPPLY GROUND Figure 1. ADS-937 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 02 Oct 2015 MDA_ADS-937.B02 Page 1 of 8 DIGITAL CORRECTION LOGIC ADS-937 16-Bit, 1MHz Sampling A/D Converters ABSOLUTE MAXIMUM RATINGS PHYSICAL/ENVIRONMENTAL PARAMETERS LIMITS UNITS PARAMETERS MIN. TYP. MAX. UNITS 0 to +16 Volts +15V Supply (Pin 9) Operating Temp. Range, Case 0 to –16 Volts ADS-937MC, MC-C 0 — +70 °C –15V Supply (Pin 8) ADS-937ME, ME-C –40 — +100 °C 0 to +6 Volts +5V Supply (Pins 10, 14) ADS-937MM, MM-C –55 — +125 °C 0 to -6 Volts –5V Supply (Pin 11) ADS-937/883, 883-C –55 — +125 °C –0.3 to +VDD +0.3 Volts Digital Input (Pin 16) Thermal Impedance ±15 Volts Analog Input (Pin 1) Θjc — 5 — °C/Watt +300 °C Lead Temperature (10 seconds) Θca — 22 — °C/Watt –65 — +150 °C Storage Temperature Range FUNCTIONAL SPECIFICATIONS 32-pin, side-brazed, metal-sealed, ceramic TDIP Package Type (TA = +25°C, ±VCC = ±15V, +VDD = ±5V, 1MHz sampling rate, and a minimum 1 0.56 ounces (16 grams) Weight minute warm-up ➀ unless otherwise speciŢ ed.) +25°C 0 TO +70°C –55 TO +125°C ANALOG INPUT MIN. TYP. MAX. MIN. TYP. MAX. MIN. TYP. MAX. UNITS Input Voltage Range ➁ — ±5 — — ±5 — — ±5 — Volts Bipolar — 0 to -10 — — 0 to -10 — — 0 to -10 — Volts Unipolar —1— —1— —1— kΩ Input Resistance — 7 15 — 7 15 — 7 15 pF Input Capacitance DIGITAL INPUTS Logic Levels +2.0 — — +2.0 — — +2.0 — — Volts Logic "1" — — +0.8 — — +0.8 — — +0.8 Volts Logic "0" — — +20 — — +20 — — +20 μA Logic Loading "1" — — –20 — — –20 — — –20 μA Logic Loading "0" 20 500 — 20 500 — 20 500 — ns Start Convert Positive Pulse Width ➂ STATIC PERFORMANCE — 16 — — 16 — — 16 — Bits Resolution — ±0.75 — — ±1.5 — — ±2 — LSB Integral Nonlinearity –0.95 ±0.5 +1 –0.95 ±0.5 +1 –0.95 ±0.5 +1.5 LSB Differential Nonlinearity (fin = 10kHz) — ±0.1 ±0.25 — ±0.2 ±0.4 — ±0.25 ±0.5 %FSR Full Scale Absolute Accuracy — ±0.1 ±0.15 — ±0.1 ±0.25 — ±0.15 ±0.5 %FSR Bipolar Zero Error (Tech Note 2) — ±0.1 ±0.2 — ±0.15 ±0.3 — ±0.2 ±0.5 %FSR Bipolar Offset Error (Tech Note 2) — ±0.1 ±0.3 — ±0.25 ±0.5 — ±0.4 ±0.7 % Gain Error (Tech Note 2) — ±0.1 ±0.15 — ±0.1 ±0.25 — ±0.15 ±0.5 %FSR Unipolar Offset Error (Tech Note 2) 16 — — 16 — — 16 — — Bits No Missing Codes (fin = 10kHz) DYNAMIC PERFORMANCE Peak Harmonics (–0.5dB) — –90 -84 — –90 -84 — –88 -83 dB dc to 100kHz — –88 -81 — –88 -81 — –87 -80 dB 100kHz to 500kHz Total Harmonic Distortion (–0.5dB) — –87 -82 — –87 -82 — –86 -81 dB dc to 100kHz — –86 -81 — –86 -81 — –85 -80 dB 100kHz to 500kHz Signal-to-Noise Ratio (w/o distortion, –0.5dB) 85 88 — 85 88 — 84 87 — dB dc to 100kHz 84 87 — 84 87 — 83 87 — dB 100kHz to 500kHz Signal-to-Noise Ratio ➃ (& distortion, –0.5dB) 81 85 — 81 85 — 80 84 — dB dc to 100kHz 80 84 — 80 84 — 78 83 — dB 100kHz to 500kHz — 110 — — 110 — — 110 — μVrms Noise Two-Tone Intermodulation Distortion (fin = 100kHz, — –85 — — –85 — — –85 — dB 240kHz, fs = 1MHz, –0.5dB) Input Bandwidth (–3dB) — 4.5 — — 4.5 — — 4.5 — MHz Small Signal (–20dB input) —4— —4— —4— MHz Large Signal (–0.5dB input) —84— —84— —84— dB Feedthrough Rejection (fin = 500kHz) — ±33 — — ±33 — — ±33 — V/μs Slew Rate — +20 — — +20 — — +20 — ns Aperture Delay Time —5— —5— —5— ps rms Aperture Uncertainty S/H Acquisition Time — 260 300 — 260 300 — 260 300 ns ( to ±0.003%FSR, 10V step) — 500 1000 — 500 1000 — 500 1000 ns Overvoltage Recovery Time ➄ 1— —1— —1— — MHz A/D Conversion Rate DATEL, Inc. 11 Cabot Boulevard, MansŢ eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com 02 Oct 2015 MDA_ADS-937.B02 Page 2 of 8 ADS-937 16-Bit, 1MHz Sampling A/D Converters +25°C 0 TO +70°C –55 TO +125°C MIN. TYP. MAX. MIN. TYP. MAX. MIN. TYP. MAX. UNITS ANALOG OUTPUT Internal Reference Voltage +4.95 +5.0 +5.05 +4.95 +5.0 +5.05 +4.95 +5.0 +5.05 Volts Drift — ±30 — — ±30 — — ±30 — ppm/°C External Current — 1 — — 1 — — 1 — mA DIGITAL OUTPUTS Logic Levels Logic "1" +2.4 — — +2.4 — — +2.4 — — Volts Logic "0" — — +0.4 — — +0.4 — — +0.4 Volts Logic Loading "1" — — –4 — — –4 — — –4 mA Logic Loading "0" — — +4 — — +4 — — +4 mA Output Coding (Offset) Binary / Complementary (Offset) Binary POWER REQUIREMENTS Power Supply Ranges +15V Supply +14.5 +15.0 +15.5 +14.5 +15.0 +15.5 +14.5 +15.0 +15.5 Volts –15V Supply –14.5 –15.0 –15.5 –14.5 –15.0 –15.5 –14.5 –15.0 –15.5 Volts +5V Supply +4.75 +5.0 +5.25 +4.75 +5.0 +5.25 +4.75 +5.0 +5.25 Volts –5V Supply –4.75 –5.0 –5.25 –4.75 –5.0 –5.25 –4.75 –5.0 –5.25 Volts Power Supply Currents +15V Supply — +7 +11 — +7 +11 — +7 +11 mA –15V Supply — -8 -10 — -8 -10 — -8 -10 mA +5V Supply — +133 +145 — +133 +145 — +133 +145 mA -5V Supply — -72 -80 — -72 -80 — -72 -80 mA Power Dissipation — 1.25 1.4 — 1.25 1.4 — 1.25 1.4 Watts Power Supply Rejection — — ±0.01 — — ±0.01 — — ±0.01 %FSR/%V FOOTNOTES: ➀ All power supplies must be on before applying a start convert pulse. All ➃ Effective bits is equal to: Full Scale Amplitude supplies and the clock (START CONVERT) must be present during warm-up (SNR + Distortion) – 1.76 + 20 log Actual Input Amplitude periods. The device must be continuously converting during this time. 6.02 ➁ Contact DATEL for other input voltage ranges. ➂ A 1MHz clock with a 500nsec positive pulse width (50% duty cycle) is used ➄ This is the time required before the A/D output data is valid once the analog for all production testing. Any duty cycle may be used as long as a minimum input is back within the speciŢ ed range. positive pulse width of 20nsec is maintained. For applications requiring lower sampling rates, clock frequencies less than 1MHz may be used. TECHNICAL NOTES THERMAL REQUIREMENTS 1. Obtaining fully specifi ed performance from the ADS-937 requires All DATEL sampling A/D converters are fully characterized and specifi ed over careful attention to pc-card layout and power supply decoupling. The operating temperature (case) ranges of 0 to +70°C and –55 to +125°C. All device's ground pins are not connected to each other internally. For room-temperature (TA = +25°C) production testing is performed without the use optimal performance, tie all ground pins (2, 12 and 13) directly to a of heat sinks or forced-air cooling. Thermal impedance fi gures for each device large analog ground plane beneath the package. The device's +5V are listed in their respective specifi cation tables. These devices do not normally supply pins are not connected to each other internally and should be require heat sinks, however, standard precautionary design and layout procedures connected to a clean analog +5V supply. Bypass all power sup- should be used to ensure devices do not overheat. The ground and power planes plies and the +5V REFERENCE OUTPUT (pin 5) to ground with 4.7μF beneath the package, as well as all pcb signal runs to and from the device, tantalum capacitors in parallel with 0.1μF ceramic capacitors. Locate should be as heavy as possible to help conduct heat away from the package. the bypass capacitors as close to the unit as possible. Tie a 47μF Electrically-insulating, thermally-conductive "pads" may be installed underneath capacitor between COMPENSATION (pin 7) and ground (See fi gure 2.). the package. Devices should be soldered to boards rather than "socketed", and of course, minimal air fl ow over the surface can greatly help reduce the package 2. The ADS-937 achieves its specifi ed accuracies without the need for temperature. external calibration. If required, the device's small initial offset and gain errors can be reduced to zero using the adjustment circuitry shown in Figure 2. When using this circuitry, or any similar offset and gain calibration hardware, make adjustments following warm-up. To avoid interaction, always adjust offset before gain. Float pins 4 and 6 if not using offset and gain adjust circuits. 3. Applying a start convert pulse while a conversion is in progress (EOC = logic "1") will initiate a new and inaccurate conversion cycle. Data for the interrupted and subsequent conversions will be invalid. DATEL, Inc. 11 Cabot Boulevard, MansŢ eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com 02 Oct 2015 MDA_ADS-937.B02 Page 3 of 8 ADS-937 16-Bit, 1MHz Sampling A/D Converters CALIBRATION PROCEDURE Connect the converter per Table 1 for the appropriate input voltage 3. For a bipolar input - Adjust the offset potentiometer until the output code range. Any offset/gain calibration procedures should not be imple- fl ickers equally between 1000 0000 0000 0000 and 0111 1111 1111 mented until the device is fully warmed up. To avoid interaction, adjust 1111. offset before gain. The ranges of adjustment for the circuits in Figure For a unipolar input - Adjust the offset potentiometer until all output bits 2 are guaranteed to compensate for the ADS-937's initial accuracy are 0's and the LSB fl ickers between 0 and 1. errors and may not be able to compensate for additional system errors. A/D converters are calibrated by positioning their digital outputs ex- GAIN ADJUST PROCEDURE actly on the transition point between two adjacent digital output codes. This is accomplished by connecting LED's to the digital outputs and 1. Apply –4.999771V to the ANALOG INPUT (pin 1) for bipolar gain adjust or performing adjustments until certain LED's "fl icker" equally between apply –9.999771V to pin 1 for unipolar gain adjust. on and off. Other approaches employ digital comparators or microcon- 2. For a unipolar input - Adjust the gain potentiometer until all output bits trollers to detect when the outputs change from one code to the next. are 1's and the LSB fl ickers between 1 and 0. For the ADS-937, offset adjusting is normally accomplished when the For a bipolar input - Adjust the gain potentiometer until all output bits are analog input is 0 minus ½LSB (–76.3μV). See Table 2 for the proper 1's and the LSB fl ickers between 1 and 0. bipolar and unipolar output coding. 3. To confi rm proper operation of the device, vary the applied input voltage Gain adjusting is accomplished when the analog input is at nominal full to obtain the output coding listed in Table 2. scale minus 1½LSB's (–9.999771V for unipolar and –4.999771V for bipolar). ZERO/OFFSET ADJUST PROCEDURE Table 1. Setting Output Coding Selection (Pin 35) 1. Apply a train of pulses to the START CONVERT input (pin 16) so that the converter is continuously converting. INPUT VOLTAGE RANGE INPUT PIN TIE TOGETHER 2. For unipolar or bipolar zero/offset adjust, apply –76.3μV to the ANALOG ±5V Pin 1 Pins 2 and 3 INPUT (pin 1). 0 to -10V Pin 1 Pins 3 and 5 Table 2. Output Coding COMPLEMENTARY BINARY COMPLEMENTARY OFFSET BINARY OUTPUT CODING UNIPOLAR INPUT VOLTAGE INPUT RANGE BIPOLAR SCALE 0 to -10V ±5V SCALE MSB LSB MSB LSB –FS +1 LSB -9.999847 1111 1111 1111 1111 0000 0000 0000 0000 +4.999847 +FS -1 LSB –7/8 FS -8.750000 1110 0000 0000 0000 0001 1111 1111 1111 +3.750000 +3/4 FS –3/4 FS -7.500000 1100 0000 0000 0000 0011 1111 1111 1111 +2.500000 +1/2 FS –1/2 FS -5.000000 1000 0000 0000 0000 0111 1111 1111 1111 +0.000000 0 –1/4 FS -2.500000 0100 0000 0000 0000 1011 1111 1111 1111 -2.500000 –1/2 FS –1/8 FS -1.250000 0010 0000 0000 0000 1101 1111 1111 1111 -3.750000 –3/4 FS –1 LSB -0.000153 0000 0000 0000 0001 1111 1111 1111 1110 -4.999847 –FS +1 LSB 0 0.000000 0000 0000 0000 0000 1111 1111 1111 1111 -5.000000 –FS DATEL, Inc. 11 Cabot Boulevard, MansŢ eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com 02 Oct 2015 MDA_ADS-937.B02 Page 4 of 8 ADS-937 16-Bit, 1MHz Sampling A/D Converters Pin 5 (ADS-937) 20kΩ –15V +15V 10kΩ 6 15 4 GAIN EOC OFFSET 32 BIT 1 (MSB) ADJUST ADJUST 31 BIT 2 30 BIT 3 14 +5V DIGITAL 29 BIT 4 28 BIT 5 4.7μF 0.1μF 13 DIGITAL 27 BIT 6 GROUND 26 BIT 7 8 25 BIT 8 –15V 24 BIT 9 23 BIT 10 4.7μF 0.1μF 12 ANALOG GROUND 22 BIT 11 21 BIT 12 ADS-937 4.7μF 0.1μF 9 20 BIT 13 +15V 19 BIT 14 18 BIT 15 10 +5V ANALOG 17 BIT 16 (LSB) + 16 4.7μF 0.1μF ANALOG 2 START CONVERT GROUND + 47μF 7 COMPENSATION 4.7μF 0.1μF 11 + –5V ANALOG 1 ANALOG INPUT 5 +5V REF. OUT 3 UNIPOLAR 0.1μF 4.7μF Figure 2. Typical ADS-937 Connection Diagram N N+1 START 500ns typ. CONVERT 5ns typ. Acquisition Time INTERNAL S/H 740ns typ. 260ns typ. Hold 65ns typ. EOC Conversion Time 730ns typ. 20ns typ. Invalid Data 20ns OUTPUT Data N-1 Valid N Data N-2 Valid DATA 980ns typ. Scale is approximately 50ns per division. Note: Scale is approximately 50ns per division. Sampling Rate = 1MHz. Figure 3. ADS-937 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 02 Oct 2015 MDA_ADS-937.B02 Page 5 of 8 ++ ADS-937 16-Bit, 1MHz Sampling A/D Converters 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 –130 –140 –150 0 50 100 150 200 250 300 350 400 450 500 kHz kHz kHz kHz kHz kHz kHz kHz kHz kHz Frequency (fs = 1MHz, fin = 480kHz, Vin = – 0.5dB, 16,384-point FFT) Figure 4. FFT Analysis of ADS-937 0.63 – 0.50 Codes 0 65,536 65,536 0 Digital Output Code Figure 5. ADS-937 Histogram and Differential Nonlinearity DATEL, Inc. 11 Cabot Boulevard, MansŢ eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com 02 Oct 2015 MDA_ADS-937.B02 Page 6 of 8 Amplitude Relative to Full Scale (dB) Number of Occurrences DNL (LSB's) ADS-937 16-Bit, 1MHz Sampling A/D Converters Figure 6. ADS-937 Evaluation Board. DATEL, Inc. 11 Cabot Boulevard, MansŢ eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com 02 Oct 2015 MDA_ADS-937.B02 Page 7 of 8 C27 R2 OPT OPT +15V C22 C11 AIN SG2 OPT OPT R1 7 2 – P4 6 OPT AR1 OPT 3 SG3 AMPLIFIER + 4 C23 OPTION +5VD OPT C1 + 0.1uF 1 32 –15V (MSB) BIT1 AIN C12 SG1 20 SG4 2 BIT1 OPT 19 (MSB) 2 31 AGND BIT2 1D 1Q 34 33 18 BIT2 3 –15V 2D 2Q 32 31 3 30 R4 BIT3 BIT3 UNIPOLAR 4 17 1 "OFFSET ADJ." 2 20K 3D 3Q 30 29 C28 BIT4 JPR2 +15V 4 5 16 29 0.1uF 4Q 28 27 BIT4 4D OFFSET ADJ. 3 U1 BIT5 6 15 REF 5D 5Q 26 25 C4 5 28 C15 JPR2 BIT5 BIT6 REF. OUT 7 14 10uF 0.1uF 6D 6Q 24 23 BIT7 8 13 R5 6 27 "GAIN ADJ." BIT6 7D 7Q 22 21 GAIN ADJ 20K UUT BIT8 C25 9 12 C16 22uF 8D 8Q 20 19 + 7 26 0.1uF BIT7 1 COMP. 11 C5 0.1uF LE OC ADS-937 8 + 25 10 P1 BIT8 C14 22uF –15VA 74HCT573 –15V P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P2 P P2 P2 2 +5VD 26 25 N.C. C17 C6 9 24 BIT9 +15VA 10uF 0.1uF 24 23 C2 N.C. 0.1uF 10 23 20 +15V BIT10 2 22 21 N.C. +5VA 19 BIT9 +5VA 1D 1Q 18 17 C18 C7 20 19 3 18 BIT10 11 22 10uF 0.1uF C8 BIT11 2D 2Q 16 15 -5VA C19 BIT11 18 17 +5VD 0.1uF 4 17 10uF 3D 3Q 14 13 12 21 15 BIT12 16 C20 C9 AGND 5 BIT12 –5V 16 4D 4Q 12 11 10uF 0.1uF U2 14 13 + 6 BIT13 13 15 20 BIT13 5Q 10 9 DGND 5D BIT14 12 11 +5VD 7 14 6Q 8 7 6D C10 19 C21 14 BIT14 10 9 +5VD 8 13 BIT15 –15V 0.1uF 10uF 7D 7Q 6 5 8 7 9 12 (LSB) BIT16 15 18 BIT15 8D 8Q 4 3 EOC 6 5 +5VD JPR3 EOC +15V 1 11 LE OC 2 1 23 17 16 4 3 START CONVERT (LSB) BIT16 START R3 10 CONVERT C26 10 12 74HCT573 21 1 +5V 0.1uF 11 +5VD U3 R6 13 C24 + 51 14 8 10uF 4 6 C29 U3 + X1 5 10uF 71 9 C3 1 8 U3 P3 2 0.1uF 10 EXT CLK 14 1 U3 3 2 7 + + + + + + ADS-937 16-Bit, 1MHz Sampling A/D Converters 5000 4000 3000 2000 This histogram represents the typical 1000 peak-to- peak noise (including quantiza- tion noise) associated with the ADS-937. 0.00 Digital Output Code Figure 7. ADS-937 Grounded Input Histogram MECHANICAL DIMENSIONS INCHES (MM) 1.62 MAX. (41.15) Dimension Tolerances (unless otherwise indicated): 2 place decimal (.XX) ±0.010 (±0.254) 3 place decimal (.XXX) ±0.005 (±0.127) 0.92 MAX. Lead Material: Kovar Alloy (23.37) Lead Finish: 50 microinches (minimum) gold plating over 100 microinches (nominal) nickel plating 1.50 TYP (38.10) SEATING PLANE 0.220 TYP. 0.05 TYP. (6.86) (1.27) PIN 1 INDEX 0.010 TYP. (0.254) 0.05 TYP. 0.90 TYP. (1.27) (22.86) 0.175 TYP 0.018 TYP. (4.45) 0.100 TYP. (0.46) (2.54) 0.05 TYP. (1.27) ORDERING INFORMATION MODEL NUMBER OPERATING TEMPERATURE RANGE PACKAGE ROHS ACCESSORIES ADS-937MC 0 to +70°C TDIP No ADS-937MC-C 0 to +70°C TDIP Yes ADS-937ME -40 to +100°C TDIP No ADS-937ME-C -40 to +100°C TDIP Yes ADS-B937 Evaluation Board (without ADS937) ADS-937MM -55 to +125°C TDIP No ADS-937MM-C -55 to +125°C TDIP Yes ADS-937/883 -55 to +125°C TDIP No ADS-937-C/883 -55 to +125°C TDIP Yes Receptacles for PC board mounting can be ordered through AMP, Inc., Part # 3-331272-8 (Component Lead Socket), 32 required. For availabilty of MIL-STD-883 product, contact DATEL. 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 02 Oct 2015 MDA_ADS-937.B02 Page 8 of 8