AD8641:  Low Power, Rail - to - Rail Output Precision JFET Amplifier in 5-lead SC70 and 8-lead SOIC lead-free packages

The AD8641/AD8642/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 ...More

AD8641:  Low Power, Rail - to - Rail Output Precision JFET Amplifier in 5-lead SC70 and 8-lead SOIC lead-free packages

Product Description

The AD8641/AD8642/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
  • Line-/battery-powered instruments
  • Photodiode amplifiers
  • Precision current sensing
  • Medical instrumentation
  • Industrial controls
  • Precision filters
  • Portable audio
  • ATE

    • Features

    • Low Supply Current: 250 µA max
    • Very Low Input Bias Current: 1 pA max
    • Low Offset Voltage: 750 µV max
    • Single-supply Operation: 5 V to 26 V
    • Dual-supply Operation: ±2.5 V to ±13 V
    • Rail-to-rail Output
    • Unity Gain Stable
    • No Phase Reversal
    • SC70 Package

    Diagrams

    • Enlarge
    • Symbols and Footprints
    AD8641 Diagram
    Pin Configuration Diagram for AD8641

    Specifications

    Vcc-Vee Supply (V) 5 to 26
    Iq per Amplifier (max) 290µA
    -3dB Bandwidth 3.5MHz
    Aol 103dB
    I out Capability 12mA
    Capacitive Load 500pF
    Slew Rate 3V/µs
    Vos 50µV
    Ib 0.25pA
    Features Rail-to-Rail,Single Supply
    Packages SC70,SOIC

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