Low-power liquid crystal display 3 1/2 A-D converter circuit

Published:2011/6/3 20:53:00 Author:Fiona | Keyword: Low-power liquid crystal display | From:SeekIC

Circuit function This is a digital display type A-D converter.It is suitable for portable small measuring instrument. Because of the use of liquid crystal display andLow consumption, Full range display voltage is 1.999V. If the input voltage is greater than this value, it should be added a attenuator.The circuit is more used for measuring instrument.Its power source voltage is in positive and negative 5V. Circuit Work 3 1 / 2-bit A-D converter ICL7106 is a monolithic LSI that can directly drive liquid crystal display, is general Instrument IC and other companies have processed products. A - D convert way is ordinary double integral type, differential input circuit can input positive and negative about 1V phase voltage, the internal does automatic zero set. Circuit adjustment can only use VR1.



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