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微功耗、SOT23封装、满摆幅、固定增益、放大和开环运算放大器

固定增益放大器,提高精度、节省空间

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主要特征

应用/用途

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主要特征

  • Internal Gain-Setting Resistors in SOT23 Packages (MAX4074/MAX4076)
  • 0.1% Gain Accuracy (RF/RG) (MAX4074/MAX4075)
  • 54 Standard Gains Available (MAX4074/MAX4075)
  • Open-Loop, Unity-Gain-Stable Op Amps (MAX4076/MAX4077/MAX4078)
  • Rail-to-Rail Outputs Drive 1kΩ Load
  • +2.5V to +5.5V Single Supply
  • 34µA Supply Current
  • Up to 4MHz GBW Product
  • Fault-Protected Inputs Withstand ±17V
  • 200pA (max) Input Bias Current
  • Stable with Capacitive Loads up to 100pF with No Isolation Resistor

应用/用途

  • 蜂窝手机
  • 无绳电话
  • 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
  • 便携式电池供电设备
  • 智能读卡器

描述

The MAX4074–MAX4078 GainAmp™ op amp family combines low-cost rail-to-rail op amps with precision internal gain-setting resistors. 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 just 34µA. GainAmp amplifiers are optimally compensated for each gain version, achieving gain bandwidth (GBW) products up to 4MHz (AV = +25V/V to +101V/V). High-voltage fault protection withstands ±17V at either input without damage or excessive current draw (MAX4074/MAX4075 only).

Two versions are available in this amplifier family. The MAX4076/MAX4077/MAX4078 are single/dual/quad open-loop, unity-gain-stable op amps, and the MAX4074/MAX4075 are single/dual fixed-gain op amps. 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 (MAX4074/MAX4075 only). The amplifiers are stable for capacitive loads up to 100pF.

For space-critical operations, the MAX4074/MAX4076 are available in space-saving SOT23-5 packages.

简化框图

MAX4074、MAX4075、MAX4076、MAX4077、MAX4078:典型工作电路 MAX4074、MAX4075、MAX4076、MAX4077、MAX4078:典型工作电路 Zoom icon

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