GENERAL DESCRIPTION

The AD7476/AD7477/AD74781 are, respectively, 12-bit, 10-bit, and 8-bit, high speed, low power, successive approximation ADCs. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 1 MSPS. Each part contains a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 6 MHz.

FEATURES

Fast throughput rate: 1 MSPS

Specified for VDD of 2.35 V to 5.25 V

Low power

3.6 mW at 1 MSPS with 3 V supplies

15 mW at 1 MSPS with 5 V supplies

Wide input bandwidth

70 dB SNR at 100 kHz input frequency

Flexible power/serial clock speed management

No pipeline delays

High speed serial interface

SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible

Standby mode: 1 μA maximum

6-lead SOT-23 package

APPLICATIONS

Battery-powered systems

Personal digital assistants

Medical instruments

Mobile communications

Instrumentation and control systems

Data acquisition systems

High speed modems

Optical sensors