General Description

The MAX125/MAX126 are high-speed, multichannel, 14-bit data-acquisition systems (DAS) with simultaneous track/holds (T/Hs). These devices contain a 14-bit, 3µs, successive-approximation analog-to-digital converter (ADC), a +2.5V reference, a buffered reference input, and a bank of four simultaneous-sampling T/H amplifiers that preserve the relative phase information of the sampled inputs. The MAX125/MAX126 have two multiplexed inputs for each T/H, allowing a total of eight inputs. In addition, the converter is overvoltage tolerant to ±17V; a fault condition on any channel will not harm the IC. Available input ranges are ±5V (MAX125) and ±2.5V (MAX126).

Features

♦ Four Simultaneous-Sampling T/H Amplifiers with Two Multiplexed Inputs (eight single-ended inputs total)

♦ 3µs Conversion Time per Channel

♦ Throughput: 250ksps (1 channel)

    142ksps (2 channels)

    100ksps (3 channels)

    76ksps (4 channels)

♦ Input Range: ±5V (MAX125)

                         ±2.5V (MAX126)

♦ Fault-Protected Input Multiplexer (±17V)

♦ ±5V Supplies

♦ Internal +2.5V or External Reference Operation

♦ Programmable On-Board Sequencer

♦ High-Speed Parallel DSP Interface

Applications

    Multiphase Motor Control

    Power-Grid Synchronization

    Power-Factor Monitoring

    Digital Signal Processing

    Vibration and Waveform Analysis