The Renesas Electronics Intersil ICL7136 is a high performance, low power 31 /2 digit, A/D converter. Included are seven segment decoders, display drivers, a reference, and a clock. The ICL7136 is designed to interface with a liquid crystal display (LCD) and includes a multiplexed backplane drive. Low noise - less than 15μVP-P
On chip clock and reference
No additional active circuits required
Low Power