The circuit of ICL7103A high precision digital voltmeter

Published:2011/5/20 0:17:00 Author:Borg | Keyword: high precision, digital voltmeter | From:SeekIC

The figure is a circuit of ICL7103A high precision digital voltmeter. This circuit is a 4.5 bit digital voltmeter circuit. ICL8052A contains reference voltage, but the voltage can't meet the minimum need of long stability, therefore, it needs to connect a reference power supply of high temperature stability from outside, the voltage is formed by LM3999. There are some problems to notice when we are assemble the circuit: the analog spot and digital spot are completely separated, there is only a ground connection near the circuit; and when we print the design of the circuit board, the digital signal induction to the analog is to be noticed.



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