RS8491 Femtoampere Input Bias Current Electrometer Amplifier
●The RS8491 is a femtoampere (10⁻¹⁵A) level input bias current operational amplifier suitable for use as an electrometer that also includes an integrated guard buffer. It has an operating voltage range of 5V to 25V, enabling it to operate in conventional 5V and 25V single supply systems as well as ±2.5V and ±12.5V dual supply systems.
●The integrated guard buffer isolates the input pins from leakage in the printed circuit board (PCB), minimizes board component count, and enables easy system design. The RS8491 is available in an industry-standard surface-mount 8-lead SOIC package with a unique pinout optimized to prevent signals from coupling between the sensitive input pins, the power supplies, and the output pin while enabling easy routing of the guard ring traces.
●The RS8491 also offers low offset voltage, low offset drift, and low voltage and current noise needed for the types of applications that require such low leakages. To maximize the dynamic range of the system, the RS8491 has a rail-to-rail output stage.
●The RS8491 is available in Green SOIC-8(SOP8) packages. It operates over an ambient temperature range of -40°C to +125°C.
■FEATURES:
●Low Input Bias Current:
◆±200fA (Max) at TA =25°C
●Low Offset Voltage: 54μV typical @5V supply
●Offset voltage drift: ±5μV/°C typical
●Integrated guard buffer with 400μV maximum offset
●Low voltage noise density: 14nV/√Hz at 10 kHz
●Wide bandwidth: 3.3MHz unity-gain crossover
●Supply voltage: 5V to 25V (±2.5V to ±12.5V)
●Operating temperature: -40°C to +125°C
●Micro SIZE PACKAGES: SOIC-8(SOP8)
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Femtoampere Input Bias Current Electrometer Amplifier 、 femtoampere (10⁻¹⁵A) level input bias current operational amplifier |
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[ electrometer ][ Laboratory ][ analytical instrumentation ][ spectrophotometers ][ chromatographs ][ mass spectrometers ][ potentiostatic coulometry ][ amperostatic coulometry ][ Instrumentation ][ picoammeters ][ coulombmeters ][ photodiodes ][ ion chambers ][ working electrode measurements ][ Chemical Sensors ][ Capacitive Sensors ] |
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Datasheet |
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Please see the document for details |
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SOIC-8;SOP8;SOIC |
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English Chinese Chinese and English Japanese |
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2023/11/29 |
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REV A.1 |
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1.8 MB |
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