TC7117ACKW713 [Microchip]

These devices are 3-1/2 digit CMOS ADCs that integrate all necessary components for a complete measurement system including seven-segment decoders, polarity and digit drivers, voltage reference, and clock circuit. The TC7116A drives LCD displays with a backplane driver, while the TC7117A drives common anode LED displays directly with 8mA drive current per segment. They feature a display hold function that freezes the reading indefinitely when HLDR is held high. The devices incorporate a precision low-drift internal reference, eliminate the need for zero adjustment potentiometer through auto-zero cycle, and provide true polarity indication for precision null applications. They offer high-impedance CMOS differential inputs (1012Ω) with low noise (15μV p-p) and low-power operation (10mW). The TC7116A/TC7117A reduce linearity error to less than 1 count and rollover error below ±1 count.