MAX125 - 2x4通道、同时采样、14位DAS

MAX125是Maxim美信半导体公司的一款数据转换器和采样-保持电路产品，MAX125是2x4通道、同时采样、14位DAS，本站介绍了MAX125的封装应用图解、特点和优点、功能等，并给出了与MAX125相关的Maxim元器件型号供参考。

MAX125 - 2x4通道、同时采样、14位DAS - 数据转换器和采样-保持电路 - 首款14位、8通道、同时采样ADC，用于工业产品 - 美信半导体

产品概述

The MAX125/MAX126 are high-speed, multichannel,14-bit data-acquisition systems (DAS) with simultaneoustrack/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 amplifiersthat preserve the relative phase information of thesampled inputs. The MAX125/MAX126 have two multiplexedinputs for each T/H, allowing a total of eightinputs. In addition, the converter is overvoltage tolerantto ±17V; a fault condition on any channel will not harmthe IC. Available input ranges are ±5V (MAX125) and±2.5V (MAX126).

An on-board sequencer converts one to four channelsper active-low CONVST pulse. In the default mode, one T/H output(CH1A) is converted. An interrupt signal (active-low INT) is providedafter the last conversion is complete. Convert two,three, or four channels by reprogramming theMAX125/MAX126 through the bidirectional parallelinterface. Once programmed, the MAX125/MAX126continue to convert the specified number of channelsper active-low CONVST pulse until they are reprogrammed.The channels are converted sequentially, beginning withCH1. The INT signal always follows the end of the lastconversion in a conversion sequence. The ADC convertseach assigned channel in 3µs and stores theresult in an internal 14x4 RAM. Upon completion of theconversions, data can be accessed by applying successivepulses to the active-low RD pin. Four successive readsaccess four data words sequentially.

The parallel interface's data-access and bus-releasetiming specifications are compatible with most populardigital signal processors and 16-bit/32-bit microprocessors,so the MAX125/MAX126 conversion results can beaccessed without resorting to wait states.

关键特性

以下关键特性由Maxim美信半导体提供：

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

热门应用

数字信号处理(DSP)

多相电机控制

功率因数监视

电网同步

振动与波形分析

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