Multichannel pressure gauge inspection circuit diagram

Published:2011/8/15 2:35:00 Author:Rebekka | Keyword: Multichannel pressure , gauge inspection | From:SeekIC

It uses more pieces of MAX1457 to match the monolithic A/D converter and single chip microcomputer to form the multi-channel pressure inspection instrument and the circuit diagram is shown as the chart. In the figure, it uses a piece of 8-1 analog switch CD4051 to receive 8-road sensor signals. The calibration coefficient of the each sensor is stored in 93C66. The output of the CD4051 connects with the ICL7135 4 1/2 bit monolithic A/D converter, then it uses the decoding driver (CD4511) and bit driver (MC1413) to drive 4 1/2 bit LED display. The 8051 single chip microcomputer decides one road sensor signal having completed A/d conversion by the DQS and BUSY signal output by ICL7135.



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