Low_power_10_bit_A_D_converter

Published:2009/7/22 21:35:00 Author:Jessie | From:SeekIC

This crystal-controlled integrating A/D converter has a 60-ms conversion time, consumes only 460 μA from a 1.5-V supply, and maintains 10-bit accuracy over a 15°C to 35°C temperature range. To calibrate, apply 0.5000 V to the input and trim the 10-kΩ pot for exactly 1000 pulses out each time the convert-command line is pulsed. No zero trim is required. However, the Q3 inverted 1-mV saturation voltage limits zero resolution to 2 LSBs.



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