41/2 Digit Lcd, Single-chip A/d Converter Corporation

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 cir- cuit requires only a few passive components and a reference to operate. It is ideal for high resolution hand-held digital multimeter applications. The performance of the ICL7129 has not been equaled before in a single chip A/D converter The successive integra- tion technique used in the ICL7129 results in accuracy better than 0.005% of full scale and resolution down to 10V/count. The ICL7129 drawing only 1mA from a 9V battery, is well suited for battery powered instruments. Provision has been made for the detection and indication of a LOW/BATTERY condition. Autoranging instruments CAN be made with the ICL7129 which provides overrange and underrange outputs and 10:1 range changing input. The ICL7129 instantly checks for continuity, giving both a visual indication and a Logic level output which CAN enable an external audible transducer. These features and the high performance of the ICL7129 make it an extremely versatile and accurate instrument-on-a-chip. By Intersil Corporation