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MAX4281：SOT23封装、满摆幅、固定增益、放大/开环运算放大器

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.

关键特性 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

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

数据手册DataSheet

关键参数

技术资料

• Fixed-Gain Op Amps Simplify Filter Design

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