MAX1422 - 12位、20Msps、+3.3V、低功耗ADC，内置电压基准

MAX1422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，MAX1422是12位、20Msps、+3.3V、低功耗ADC，内置电压基准，本站介绍了MAX1422的封装应用图解、特点和优点、功能等，并给出了与MAX1422相关的Maxim元器件型号供参考。

MAX1422 - 12位、20Msps、+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 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-differentialsignal path. The MAX1422 is optimized for lowpower,high dynamic performance applications inimaging and digital communications. The converteroperates from a single 3.3V supply, consuming only137mW while delivering a 67dB (typ) signal-to-noiseratio (SNR) at a 5MHz input frequency and a 20Mspssampling frequency. The fully-differential input stagehas a small signal -3dB bandwidth of 400MHz and maybe operated with single-ended inputs.

An internal 2.048V precision bandgap reference setsthe ADCs full-scale range. A flexible reference structureaccommodates an internally or externally appliedbuffered or unbuffered reference for applicationsrequiring increased accuracy or a different input voltagerange.

In addition to low operating power, the MAX1422 featurestwo power-down modes, a reference power-down, and ashutdown mode. In reference power-down, the internalbandgap reference is deactivated, resulting in a 2mA(typ) supply current reduction. For idle periods, a fullshutdown mode is available to maximize power savings.

The MAX1422 provides parallel, offset binary, CMOS-compatiblethree-state outputs.

The MAX1422 is available in a 7mm x 7mm x 1.4mm,48-pin TQFP package and is specified over the commercial(0°C to +70°C) and extended industrial (-40°Cto +85°C) temperature ranges.

Pin-compatible higher-speed versions of the MAX1422are also available. Please refer to the MAX1421 datasheet for 40Msps and the MAX1420 data sheet for60Msps.

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

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

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

雷达

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