GENERAL DESCRIPTION

The AD7734 is a high precision, high throughput analog front end. True 16-bit p-p resolution is achievable with a total conversion time of 500 µs (2 kHz channel switching), making it ideally suitable for high resolution multiplexing applications. The part can be configured via a simple digital interface, which allows users to balance the noise performance against data throughput up to a 15.4 kHz.

FEATURES

High resolution ADC

24 bits no missing codes

±0.0025 nonlinearity

Optimized for fast channel switching

18-bit p-p resolution (21 bits effective) at 500 Hz

16-bit p-p resolution (19 bits effective) at 2 kHz

14-bit p-p resolution (18 bits effective) at 15 kHz

On-chip per channel system calibration

4 single-ended analog inputs

Input ranges +5 V, ±5 V, +10 V, ±10 V

Overvoltage tolerant

Up to ±16.5 V not affecting adjacent channel

Up to ±50 V absolute maximum

3-wire serial interface

SPI™, QSPI™, MICROWIRE™, and DSP compatible

Schmitt trigger on logic inputs

Single-supply operation

5 V analog supply

3 V or 5 V digital supply

Package: 28-lead TSSOP

APPLICATIONS

PLCs/DCS

Multiplexing applications

Process control

Industrial instrumentation