The OPA129 is an ultra-low bias current monolithic operational amplifier offered in an 8-pin PDIP and SO-8 package. Using advanced geometry dielectrically-isolated FET (
●_Difet_®
●) inputs, this monolithic amplifier achieves a high performance level.
●_
●Difet
●_ fabrication eliminates isolation-junction leakage currentthe main contributor to input bias current with conventional monolithic FETs. This reduces input bias current by a factor of 10 to 100. Very low input bias current can be achieved without resorting to small-geometry FETs or CMOS designs which can suffer from much larger offset voltage, voltage noise, drift, and poor power supply rejection.
●The OPA129 special pinout eliminates leakage current that occurs with other op amps. Pins 1 and 4 have no internal connection, allowing circuit board guard traceseven with the surface-mount package version.
●OPA129 is available in 8-pin DIP and SO packages, specified for operation from -40°C to +85°C.
● ULTRA-LOW BIAS CURRENT: 100fA max
● LOW OFFSET: 2mV max
● LOW DRIFT: 10µV/°C max
● HIGH OPEN-LOOP GAIN: 94dB min
● LOW NOISE: 15nV/Hz at 10kHz
● PLASTIC DIP and SOIC PACKAGE
● APPLICATIONS
● PHOTODETECTOR PREAMP
● CHROMATOGRAPHY
● ELECTROMETER AMPLIFIERS
● MASS SPECTROMETER
● pH PROBE AMPLIFIER
● ION GAGE MEASUREMENT
●Difet is a registered trademark of Texas Instruments.
●All other trademarks are the property of their respective owners.
