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ADS-941 Datasheet(PDF) 1 Page - C&D Technologies |
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ADS-941 Datasheet(HTML) 1 Page - C&D Technologies |
1 / 6 page ® ® ADS-941 14-Bit, 1MHz Sampling A/D Converters FEATURES • 14-bit resolution • 1MHz minimum sampling rate • Functionally complete • Internal reference and sample/hold • No missing codes • Excellent performance • Full Nyquist-rate sampling • Small 32–pin DIP • Low power, 2.8 Watts GENERAL DESCRIPTION DATEL's ADS-941 is a functionally complete, 14-bit, 1MHz, sampling A/D converter. Its standard, 32-pin, triple-wide ceramic DIP contains a fast-settling sample/hold amplifier, a 14-bit subranging (two-pass) A/D converter, a precision reference, a three-state output register, and all the timing and control logic necessary to operate from a single start convert pulse. The ADS-941 is optimized for wideband frequency-domain applications and is fully FFT tested. Total harmonic distortion (THD) and signal-to-noise ratio (including distortion) typically run at –85dB and 80dB, respectively, with full-scale inputs up to 100kHz. The ADS-941 requires ±15V and +5V supplies and typically consumes 2.8 Watts. INPUT/OUTPUT CONNECTIONS 1 +10V REF. OUT 32 START CONVERT 2 BIPOLAR 31 BIT 1 OUT (MSB) 3 ANALOG INPUT 30 BIT 1 OUT (MSB) 4 SIGNAL GROUND 29 BIT 2 OUT 5 OFFSET ADJUST 28 BIT 3 OUT 6 ANALOG GROUND 27 BIT 4 OUT 7 OVERFLOW 26 BIT 5 OUT 8 CODING SELECT 25 BIT 6 OUT 9 ENABLE 24 BIT 7 OUT 10 +5V SUPPLY 23 BIT 8 OUT 11 DIGITAL GROUND 22 BIT 9 OUT 12 +15V SUPPLY 21 BIT 10 OUT 13 –15V SUPPLY 20 BIT 11 OUT 14 ANALOG GROUND 19 BIT 12 OUT 15 ANALOG GROUND 18 BIT 13 OUT 16 EOC 17 BIT 14 OUT (LSB) PIN FUNCTION PIN FUNCTION Figure 1. ADS-941 Functional Block Diagram REF 31 BIT 1 OUT (MSB) 30 BIT 1 OUT (MSB) 29 BIT 2 OUT 28 BIT 3 OUT 27 BIT 4 OUT 26 BIT 5 OUT 25 BIT 6 OUT 24 BIT 7 OUT 23 BIT 8 OUT 22 BIT 9 OUT 21 BIT 10 OUT 20 BIT 11 OUT 19 BIT 12 OUT 18 BIT 13 OUT 17 BIT 14 OUT (LSB) TIMING AND CONTROL LOGIC +10V REF. OUT 1 START CONVERT 32 EOC 16 DAC FLASH ADC BUFFER ANALOG INPUT 3 S2 S1 4 SIGNAL GROUND 11 DIGITAL GROUND 12 +15V SUPPLY S/H OFFSET CIRCUIT BIPOLAR 2 OFFSET ADJUST 5 10 +5V SUPPLY 6, 14, 15 ANALOG GROUND 8 CODING SELECT 13 –5V SUPPLY 9 ENABLE 7 OVERFLOW DATEL, Inc., 11 Cabot Boulevard, Mansfield, MA 02048-1151 (U.S.A.) • Tel: (508) 339-3000 Fax: (508) 339-6356 • For immediate assistance: (800) 233-2765 |
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