The document introduces the features of TC7116A/TC7117A, including low temperature drift internal reference, display hold function, direct drive LCD or LED display, zero input zero reading, low noise stable display, 2V or 200mV full scale range (FSR), automatic zero cycle to eliminate the need for zero, adjustment potentiometer, true polarity indication, convenient 9V battery operation, high impedance CMOS differential inputs and low power operation.
This document describes the TC7116/A and TC7117/A 3‑1/2 digit CMOS analog‑to‑digital converters, including their features such as low temperature drift internal reference, display hold function, and low noise operation. It outlines typical applications like thermometry, bridge readouts, digital meters, and portable instrumentation.
Detailed sections cover electrical characteristics, pin function tables for various package types, analog section operation, and reference voltage handling. The datasheet also includes a device selection table, typical application circuits, and regulatory information.
| Zero Input Reading | 0 V |
|---|---|
| Full Scale Range | 200 mV or 2 V |
| Common Mode Rejection Ratio (CMRR) | 50 |
| Noise (Peak‑to‑Peak) | 15 µV |
| Input Leakage Current | 1–10 pA |
| Zero Reading Drift | 0.2 ppm/°C |
| Scale Factor Temperature Coefficient (TC7116/A) | 5 ppm/°C |
| Input Resistance (Pin 1) | 30–70 kΩ |
The devices support a full‑scale range of 200 mV or 2 V.
The input leakage current is between 1 pA and 10 pA.
The converter performs three conversions per second.
The scale‑factor temperature coefficient is 5 ppm/°C.