OPA129 Datasheet PDF - TI

●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 current—the 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 traces—even 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.