GENERAL DESCRIPTION

The AD7476A/AD7477A/AD7478A are 12-bit, 10-bit, and 8-bit high speed, low power, successive-approximation ADCs, respectively. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 1 MSPS. The parts contain a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 13 MHz.

FEATURES

  Fast Throughput Rate: 1 MSPS

  Specified for VDD of 2.35 V to 5.25 V

  Low Power:

     3.6 mW Typ at 1 MSPS with 3 V Supplies

     12.5 mW Typ at 1 MSPS with 5 V Supplies

  Wide Input Bandwidth:

     71 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 Max

  6-Lead SC70 Package

  8-Lead MSOP Package

APPLICATIONS

  Battery-Powered Systems

     Personal Digital Assistants

     Medical Instruments

     Mobile Communications

  Instrumentation and Control Systems

  Data Acquisition Systems

  High Speed Modems

  Optical Sensors