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Maxim产品 - MAX1421介绍

MAX1421 - 12位、40Msps、3.3V、低功耗ADC，内置电压基准

MAX1421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，MAX1421是12位、40Msps、3.3V、低功耗ADC，内置电压基准，本站介绍了MAX1421的封装应用图解、特点和优点、功能等，并给出了与MAX1421相关的Maxim元器件型号供参考。

MAX1421 - 12位、40Msps、3.3V、低功耗ADC，内置电压基准 - 数据转换器和采样-保持电路 - Maxim美信半导体高性能芯片品质 - 美信半导体

产品概述

The MAX1421 is a 3.3V, 12-bit analog-to-digital converter(ADC), featuring a fully-differential input,pipelined, 12-stage ADC architecture with widebandtrack-and-hold (T/H) and digital error correction incorporatinga fully-differential signal path. The MAX1421 isoptimized for low-power, high-dynamic performanceapplications in imaging and digital communications.The converter operates from a single 3.3V supply, consumingonly 188mW while delivering a typical signal-to-noiseratio (SNR) of 66dB at an input frequency of15MHz and a sampling frequency of 40Msps. The fully-differentialinput stage has a small signal -3dB bandwidthof 400MHz and may be operated withsingle-ended inputs.

An internal 2.048V precision bandgap reference setsthe full-scale range of the ADC. A flexible referencestructure accommodates an internal or externallyapplied buffered or unbuffered reference for applicationsrequiring increased accuracy or a different inputvoltage range.

In addition to low operating power, the MAX1421 featurestwo power-down modes, a reference power-downand a shutdown mode. In reference power-down, theinternal bandgap reference is deactivated, resulting ina typical 2mA supply current reduction. For idle periods,a full shutdown mode is available to maximizepower savings.

The MAX1421 provides parallel, offset binary, CMOS-compatiblethree-state outputs.

The MAX1421 is available in a 7mm x 7mm, 48-pinTQFP package, and is specified over the commercial(0°C to +70°C) and the extended industrial (-40°C to+85°C) temperature ranges.

Pin-compatible higher- and lower-speed versions of theMAX1421 are also available. Please refer to theMAX1420 data sheet for a frequency of 60Msps andthe MAX1422 data sheet for a frequency of 20Msps.

关键特性
  • 以下关键特性由Maxim美信半导体提供：
  • Single 3.3V Power Supply
  • 67dB SNR at fIN = 5MHz
  • 66dB SNR at fIN = 15MHz
  • Internal, 2.048V Precision Bandgap Reference
  • Differential, Wideband Input T/H Amplifier
  • Power-Down Modes
  • 180mW (Reference Shutdown Mode)
  • 10µW (Shutdown Mode)
  • Space-Saving 48-Pin TQFP Package
    • 热门应用
  • CCD像素处理
  • 数据采集
  • 中频与基带数字化
  • 医疗超声成像
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