General Description

The MAX1422 3.3V, 12-bit analog-to-digital converter (ADC) features a fully differential input, pipelined, 12-stage ADC architecture with wideband track-and-hold (T/H) and digital error correction incorporating a fully-differential signal path. The MAX1422 is optimized for low power, high dynamic performance applications in imaging and digital communications. The converter operates from a single 3.3V supply, consuming only 137mW while delivering a 67dB (typ) signal-to-noise ratio (SNR) at a 5MHz input frequency and a 20Msps sampling frequency. The fully-differential input stage has a small signal -3dB bandwidth of 400MHz and may be operated with single-ended inputs.

Features

♦ Single 3.3V Power Supply

♦ 67dB SNR at fIN = 5MHz

♦ Internal 2.048V Precision Bandgap Reference

♦ Differential Wideband Input T/H Amplifier

♦ Power-Down Modes

    130mW (Reference Shutdown Mode)

    10µW (Shutdown Mode)

♦ Space-Saving 48-Pin TQFP Package

Applications

    Medical Ultrasound Imaging

    CCD Pixel Processing

    Data Acquisition

    Radar

    IF and Baseband Digitization