Description:

The NTE2055 is a high performance, low power, 3 1/2digit A/D converter combining both linear CMOS and digital CMOS circuits on a single monolithic IC. Available in a 24–Lead DIP type package, this device is designed to minimize use of external components. With two external resistors and two external capacitors, the system forms a dual slope A/D converter with automatic zero correction and automatic polarity. The NTE2055 is ratiometric and may be used over a full–scale range from 1.999V to 199.9mV. Systems using this device may operate over a wide range of power supply voltages for ease of use with batteries, or with standard 5V supplies. The output drive conforms with standard B–Series CMOS specifications and can drive a low–power Schottky TTL load.

Features:

Accuracy: ±0.05 of Reading ±1 Count

Two Voltage Ranges: 1.999V and 199.9mV

Up to 25 Conversions /s

Zin> 100MΩ

Auto–Polarity and Auto–Zero

Single Positive Voltage Reference

Standard B–Series CMOS Outputs: Drives One Low Power Schottky Load

Uses On–Chip System Clock, or External Clock

Wide Supply Range: e.g., ±4.5V to ±8.0V

Overrange and Underrange Signals Available

Operates in Auto Ranging Circuits

Operates with LED and LCD Displays

Low External Component Count

Chip Complexity: 1326 FETs