GENERAL DESCRIPTION

The AD7868 is a complete 12-bit I/O system containing a DAC and an ADC . The ADC is a successive approximation type with a track-and-hold amplifier having a combined throughput rate of 83 kHz. The DAC has an output buffer amplifier with a settling time of 3 µs to 12 bits. Temperature compensated 3 V buried Zener references provide precision references for the DAC and ADC.

FEATURES

Complete 12-Bit I/O System, Comprising:

12-Bit ADC with Track/Hold Amplifier

83 kHz Throughout Rate

72 dB SNR

12-Bit DAC with Output Amplifier

3 μs Settling Time

72 dB SNR

On-Chip Voltage Reference

Operates from 65 V Supplies

Low Power – 130 mW typ

Small 0.3 Wide DIP

APPLICATIONS

Digital Signal Processing

Speech Recognition and Synthesis

Spectrum Analysis

High Speed Modems

DSP Servo Control