[原创] Maxim MAX40242 20V低输入电流低噪音双运放解决方案

Maxim公司的MAX40242是20V低输入偏置电流低噪音双运算放大器,工作电压从2.7V到20V或双电源±1.35V到 ±10V,每路仅消耗静态度电流1.2mA,最大输入偏置电流2pA,输入噪音5nV/√Hz,带宽10MHz,转换速率8V/μs,主要用在化学传感器接口,光电二极管传感器接口,医用血氧仪,工业过程与控制和精密仪器.本文介绍了MAX40242主要优势和特性,典型应用电路以及评估板MAX40242 EVK主要特性,电路图,材料清单和PCB设计图.

The MAX40242 provides a combination of high voltage,low noise, low input bias current in a dual channel andfeatures rail-to-rail at the output.

This dual amplifier operates over a wide supply voltagerange from a single 2.7V to 20V supply or split ±1.35Vto ±10V supplies and consumes only 1.2mA quiescentsupply current per channel.

The MAX40242 is a unity-gain stable amplifier with again-bandwidth product of 10MHz. The device outputsdrive up to 200pF load capacitor without any externalisolation resistor compensation.

The MAX40242 is available in 8-thin wafer-levelpackages (WLPs) and is rated for operation over the-40℃ to +125℃ automotive temperature range.

MAX40242主要优势和特性:

●● 2.7V to 20V Single Supply or ±1.35V to ±10V DualSupplies
●● 2pA (Max) Input Bias Current
●● 5nV/√Hz Input Voltage Noise
●● 10MHz Bandwidth
●● 8V/μs Slew Rate
●● Rail-to-Rail Output..

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