Simple_fast_10_bit_A_D_converter

Published:2009/7/22 21:59:00 Author:Jessie | From:SeekIC

This circuit is especially useful where a large number of converters is required and all can be serviced by one clock. For a 0-2.5-V range, the analog input (EX) is applied to the 2.5-kΩ resistor. For a 0-to 10-V range, the 2.5-kΩ resistor is grounded and EX is applied to the 7.5-kΩ resistor. The 100-MHz clock pulse bursts that appear at the output are proportional to EX. For a 0- to 10-V input, 1024 pulses appear at full-scale, 512 pulses at 5.00 V etc. The circuit will hold ±1 LSB accuracy over 0°C to 70°C with an additional t1 LSB uncertainty. The 2-kΩ gain trim pot is adjusted for the desired output count.



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