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SOT23封装、满摆幅、固定增益、放大/开环运算放大器

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主要特征

应用/用途

简化框图

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主要特征

  • GainAmp Family Provides Internal Precision Gain-Setting Resistors in SOT23 (MAX4174/5)
  • 0.1% Gain Accuracy (RF/RG) (MAX4174/5, MAX4274/5)
  • 54 Standard Gains Available (MAX4174/5, MAX4274/5)
  • Open-Loop Unity-Gain-Stable Op Amps (MAX4281/2/4)
  • Rail-to-Rail Outputs Drive 1kΩ Load
  • Internal VCC/2 Biasing (MAX4175/MAX4275)
  • +2.5V to +5.5V Single Supply
  • 300µA Supply Current
  • Up to 23MHz GBW Product
  • Fault-Protected Inputs Withstand ±17V
  • Stable with Capacitive Loads Up to 470pF with No Isolation Resistor

应用/用途

  • 蜂窝手机
  • 数码相机(DIGICAM)
  • 血糖表
  • GPS方案
  • 红外接收器,用于远端控制
  • 仪表、终端与条码读卡器
  • IP摄像机
  • 遥控钥匙
  • 低端电流检测放大器
  • MP3和便携式媒体播放器
  • 光电二极管前置放大器
  • 便携式仪表
  • 智能读卡器

描述

The MAX4174/MAX4175/MAX4274/MAX4275 GainAmp family combines a low-cost rail-to-rail op amp with precision internal gain-setting resistors and VCC/2 biasing. Factory-trimmed on-chip resistors decrease design size, cost, and layout, and provide 0.1% gain accuracy. Fixed inverting gains from -0.25V/V to -100V/V or noninverting gains from +1.25V/V to +101V/V are available. These devices operate from a single +2.5V to +5.5V supply and consume only 300µA. GainAmp amplifiers are optimally compensated for each gain version, achieving exceptional GBW products up to 23MHz (AV = +25V/V to +101V/V). High-voltage fault protection withstands µ17V at either input without excessive current draw.

Three versions are available in this amplifier family: single/dual/quad open-loop, unity-gain stable (MAX4281/MAX4282/MAX4284); single/dual fixed gain (MAX4174/MAX4274); and single/dual fixed gain plus internal VCC/2 bias at the noninverting input (MAX4175/MAX4275), which simplifies input biasing in single-supply designs. The input common-mode voltage range of the open-loop amplifiers extends from 150mV below the negative supply to within 1.2V of the positive supply. The outputs can swing rail-to-rail and drive a 1kΩ load while maintaining excellent DC accuracy. The amplifier is stable for capacitive loads up to 470pF.

简化框图

MAX4174、MAX4175、MAX4274、MAX4275、MAX4281、MAX4282、MAX4284:典型工作电路 MAX4174、MAX4175、MAX4274、MAX4275、MAX4281、MAX4282、MAX4284:典型工作电路 Zoom icon

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在Maxim的知识库中搜索技术问题的答案

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心