GENERAL DESCRIPTION

The AD7738 is a high precision, high throughput analog front end. True 16-bit p-p resolution is achievable with a total conversion time of 117 µs (8.5 kHz channel switching), making it ideally suitable for high resolution multiplexing applications.

FEATURES

High Resolution ADC

24 Bits No Missing Codes

±0.0015 Nonlinearity

Optimized for Fast Channel Switching

18-Bits p-p Resolution (21 Bits Effective) at 500 Hz

16-Bits p-p Resolution (19 Bits Effective) at 8.5 kHz

15-Bits p-p Resolution (18 Bits Effective) at 15 kHz

On-Chip Per Channel System Calibration

Configurable Inputs

8 Single-Ended or 4 Fully Differential

Input Ranges

+625 mV, +1.25 V, +2.5 V, ±625 mV, ±1.25 V, ±2.5 V

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