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ADS-EVAL4 Datasheet(PDF) 4 Page - C&D Technologies |
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ADS-EVAL4 Datasheet(HTML) 4 Page - C&D Technologies |
4 / 6 page ® ® ADS-941 4 Figure 3. ADS-941 Connection Diagram Figure 2. ADS-941 Timing Diagram Removing System Errors Use external potentiometers to remove system errors or to reduce the small initial errors to zero. Use a 100 Ω trimpot in series with the analog input for gain adjustment. Use a fixed 50 Ω resistor instead of the trimpot for operation without adjustment. Use a 20k Ω trimpot with the wiper tied to OFFSET ADJUST (pin 5) for zero/offset adjustment. Connect pin 5 to ANALOG GROUND (pin 6) for operation without zero/offset adjustment. ADS-941 20k Ω 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 7 16 BIT 1 (MSB) BIT 1 (MSB) BIT2 BIT 3 BIT 4 BIT 5 BIT 6 BIT 7 BIT 8 BIT 9 BIT 10 BIT 11 BIT 12 BIT 13 BIT 14 (LSB) OVERFLOW EOC ANALOG GROUND DIGITAL GROUND 0.1µF 4.7µF 0.1µF ENABLE 4.7µF +10V REF. OUT CODING SELECT 10 11 9 1 8 +5V –5V +5V OFFSET ADJUST 5 3 0.1µF 4.7µF 6, 14, 15 13 0.1µF 4.7µF 12 –15V +15V 32 START CONVERT ANALOG INPUT 100 Ω 2 BIPOLAR 4 SIGNAL GROUND ZERO/OFFSET ADJUST 0 to +10V GAIN ADJUST Scale is approximately 50ns per division. START CONVERT INTERNAL S/H N N+1 35ns max. EOC 10ns typ. Conversion Time 600ns typ. OUTPUT DATA DATA N VALID Hold DATA N-1 VALID 30ns max. 50ns min., 100ns max 350ns max. Aquisition Time INVALID DATA 600ns min. 400ns max. |
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