A range of low input bias current and monolithic “electrometer” operational amplifiers from Analog Devices. These op amps feature high input impedance and ultra-low input bias currents and are suitable for applications such as electrometer amplifiers, photodiode preamplifiers, pH electrode buffers and transimpedance amplifiers.
Feature
- Low input bias current
- ±20 fA maximum at TA = 25°C (guaranteed at production test)
- ±20 fA maximum at −40°C < TA < +85°C
- ±250 fA maximum at −40°C < TA < +125°C (guaranteed at production test)
- Low offset voltage: 50 μV maximum over specified CMRR range
- Offset voltage drift: ±0.13 μV/°C typical, ±0.5 μV/°C maximum
- Integrated guard buffer with 100 μV maximum offset
- Low voltage noise density: 14 nV/√Hz at 10 kHz
- Wide bandwidth: 2 MHz unity-gain crossover
- Supply voltage: 4.5 V to 16 V (±2.25 V to ±8 V)
- Operating temperature: −40°C to +125°C
- Long-term offset voltage drift (10,000 hours): 0.5 μV typical
- Temperature hysteresis: 1.5 μV typical
Applications
- Laboratory and analytical instrumentation: spectrophotometers, chromatographs, mass spectrometers, and potentiostatic and amperostatic coulometry
- Instrumentation: picoammeters and coulombmeters
- Transimpedance amplifier (TIA) for photodiodes, ion chambers, and working electrode measurements
- High impedance buffering for chemical sensors and capacitive sensors
(Picture: Pinout)
