four-and-a half display voltage meter formed by the single-chip CMOS IC circuit

Published:2011/8/11 4:13:00 Author:John | Keyword: four-and-a half display voltage meter, single-chip, CMOS, IC | From:SeekIC

This is the four-and-a half display voltage meter composed of the ICL7129 monolithic CMOS IC. It is equipped with the multi-scan matrix (100Hz) LCD (liquid crystal display) digital device. It is especially for production of high-resolution pocket multimeter. It has the auto-zero function without the need for external capacitors. Only a 9V power supply (battery) is required. The current consumption is only 1mA and the changing speed is 2 times / second. Its direct input analog voltage range is ± 200 mA and its maximum bit resolution is 10μV. When the power supply voltage is lower than7.2V, the alarm and display functions can be identified.



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