AD8642

低功耗，轨到轨输出精密JFET放大器 Low Power, Rail-to-Rail Output Precision JFET Amplifier

Product Details

The AD8641//AD8643 are low power, precision JFET input amplifiers featuring extremely low input bias current and rail-to-rail output. The ability to swing nearly rail-to-rail at the input and rail-to-rail at the output enables designers to buffer CMOS DACs, ASICs, and other wide output swing devices in single-supply systems. The outputs remain stable with capacitive loads of more than 500 pF.

The AD8641/AD8642/AD8643 are suitable for applications utilizing multichannel boards that require low power to manage heat. Other applications include photodiodes, ATE reference level drivers, battery management, and industrial controls.

The AD8641/AD8642/AD8643 are fully specified over the extended industrial temperature range of –40°C to +125°C. The AD8641 is available in 5-lead SC70 and 8-lead SOIC lead-free packages. The AD8642 is available in 8-lead MSOP and 8-lead SOIC lead-free packages. The AD8643 is available in 14-lead SOIC and 16-lead, 3 mm × 3 mm, LFCSP lead-free packages.

**Applications**

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Line-/battery-powered instruments

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Photodiode amplifiers

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Precision current sensing

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Medical instrumentation

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Industrial controls

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Precision filters

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Portable audio

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ATE

### Features and Benefits

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Low Supply Current: 250 µA max

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Very Low Input Bias Current: 1 pA max

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Low Offset Voltage: 750 µV max

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Single-supply Operation: 5 V to 26 V

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Dual-supply Operation: ±2.5 V to ±13 V

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Rail-to-rail Output

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Unity Gain Stable

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No Phase Reversal