The TC7136/TC7136A are low power, 3-1/2 digit with liquid crystal display (LCD) drivers and analog-to-digital converters produced by Microchip Technology Inc. They have fast over range recovery, low temperature drift internal reference, zero reading with zero input, low noise, high resolution, low input leakage current, precision null detectors, high-impedance differential input, convenient 9V battery operation and low power dissipation.