Description
The Intersil ICL7129 is a very high performance 41/2-digit, analog-to-digital converter that directly drives a multiplexed liquid crystal display. This single chip CMOS integrated circuit requires only a few passive components and a reference to operate. It is ideal for high resolution hand-held digital multimeter applications.

Features
• ±19,999 Count A/D Converter Accurate to ±4 Count
• 10µV Resolution on 200mV Scale
• 110dB CMRR
• Direct LCD Display Drive
• True Differential Input and Reference
• Low Power Consumption
• Decimal Point Drive Outputs
• Overrange and Underrange Outputs
• Low Battery Detection and Indication
• 10:1 Range Change Input