AD8628WARZ-RL

AD8628WARZ-RL FEATURES

Lowest auto-zero amplifier noiseLow offset voltage: 1 µVInput offset drift: 0.002 µV/°CRail-to-rail input and output swing5 V single-supply operationHigh gain, CMRR, and PSRR: 130 dBVery low input bias current: 100 pA maximumLow supply current: 1.0 mAOverload recovery time: 50 µsNo external components requiredQualified for automotive applications

AD8628WARZ-RL GENERAL DESCRIPTION

This amplifier has ultralow offset, drift, and bias current.The AD8628/AD8629/AD8630 are wide bandwidth auto-zeroamplifiers featuring rail-to-rail input and output swing and lownoise. Operation is fully specified from 2.7 V to 5 V single supply(±1.35 V to ±2.5 V dual supply).The AD8628/AD8629/AD8630 provide benefits previouslyfound only in expensive auto-zeroing or chopper-stabilizedamplifiers. Using Analog Devices, Inc., topology, these zero-drift amplifiers combine low cost with high accuracy and lownoise. No external capacitor is required. In addition, the AD8628/AD8629/AD8630 greatly reduce the digital switching noisefound in most chopper-stabilized amplifiers.With an offset voltage of only 1 µV, drift of less than 0.005 μV/°C,and noise of only 0.5 µV p-p (0 Hz to 10 Hz), the AD8628/AD8629/AD8630 are suited for applications where errorsources cannot be tolerated. Position and pressure sensors,medical equipment, and strain gage amplifiers benefit greatlyfrom nearly zero drift over their operating temperature range.Many systems can take advantage of the rail-to-rail input andoutput swings provided by the AD8628/AD8629/AD8630 toreduce input biasing complexity and maximize SNR.

AD8628WARZ-RL APPLICATIONS

Automotive sensorsPressure and position sensorsStrain gage amplifiersMedical instrumentationThermocouple amplifiersPrecision current sensingPhotodiode amplifiers