Description:

The NTE2053 is a CMOS 8–bit successive approximation Analog to Digital converter in a 20–Lead DIP type package which uses a differential potentiometric ladder – similar to the 256R products. This device is designed to allow operation with the NSC800 and INS8080A derivative control bus, and TRI–STATE® output latches directly drive the data bus. These A/Ds appear like memory locations or I/O ports to the microprocessor and no interfacing logic is needed.

A new differential analog voltage input allows increasing the common–mode rejection and offsetting the analog zero input voltage value. In addition, the voltage reference input can be adjusted to allow encoding any similar analog voltage span to the full 8 bits of resolution.

Features:

• Compatible With 8080 MPU Derivatives – No Interfacing Logic Needed – Access Time: 135ns

• Easy Interface to all Microprocessors, or Operates “Stand Alone”

• Differential Analog Voltage Inputs

• Logic Inputs and Outputs Meet Both MOS and TTL Voltage Level Specifications

• Works With 2.5V (NTE952) Voltage Reference

• On–Chip Clock Generator

• 0V to 5V Analog Input Voltage Range with Single 5V Supply

• No Zero Adjust Required

• Operates Ratiometrically or with 5V, 2.5V, or Analog Span Adjusts Voltage Reference