General Description

The MAX1274/MAX1275 low-power, high-speed, serialoutput, 12-bit, analog-to-digital converters (ADCs) operate at up to 1.8Msps. These devices feature true-differential inputs, offering better noise immunity, distortion improvements, and a wider dynamic range over single-ended inputs. A standard SPI™/QSPI™/MICROWIRE™ interface provides the clock necessary for conversion. These devices easily interface with standard digital signal processor (DSP) synchronous serial interfaces.

Features

♦ 1.8Msps Sampling Rate

♦ Only 45mW (typ) Power Dissipation

♦ Only 1µA (max) Shutdown Current

♦ High-Speed, SPI-Compatible, 3-Wire Serial Interface

♦ 70dB S/(N + D) at 525kHz Input Frequency

♦ Internal True-Differential Track/Hold (T/H)

♦ External Reference

♦ No Pipeline Delays

♦ Small 12-Pin TQFN Package

Applications

    Data Acquisition

    Communications

    Bill Validation

    Portable Instruments

    Motor Control