AD7870AQ Datasheet PDF - ADI

GENERAL DESCRIPTION

●The AD7870/AD7875/AD7876 is a fast, complete, 12-bit A/D converter. It consists of a track/hold amplifier, 8 µs successive approximation ADC, 3 V buried Zener reference and versatile interface logic. The ADC features a self-contained internal clock which is laser trimmed to guarantee accurate control of conversion time. No external clock timing components are required; the on-chip clock may he overridden by an external clock if required.

●The parts offer a choice of three data output formats: a single, parallel, 12-bit word; two 8-bit bytes or serial data. Fast bus access times and standard control inputs ensure easy interfacing to modern microprocessors and digital signal processors.

●FEATURES

●  Complete Monolithic 12-Bit ADC with:

●     2 ms Track/Hold Amplifier

●     8 ms A/D Converter

●     On-Chip Reference

●     Laser-Trimmed Clock

●     Parallel, Byte and Serial Digital Interface

●  72 dB SNR at 10 kHz Input Frequency (AD7870, AD7875)

●  57 ns Data Access Time

●  Low Power: –60 mW typ

●  Variety of Input Ranges:

●     ±63 V for AD7870

●     0 V to ±5 V for AD7875

●     ±610 V for AD7876