OPA129UBE4 product image


Operational Amplifiers - Op Amps
Texas Instruments(texas)


The OPA129UBE4  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.


OPA129UBE4 Features


• Ultra-low bias current: 100fa max
• Low offset: 2mv max
• Low drift: 10mv/°c max
• High open-loop gain: 94db min
• Low noise: 15nv/öhz at 10khz
• Plastic dip and soic package


OPA129UBE4 Applications


• Photodetector preamp
• Chromatography
• Electrometer amplifiers
• Mass spectrometer
• Ph probe amplifier
• Ion gage measurement

Number of Channels1
Common Mode Rejection Ratio (Min)80 dB
Input Offset Voltage2 mV
Input Bias Current (Max)0.25 pA
Operating Supply Voltage+/- 5 V to +/- 18 V
Mounting StyleSMD/SMT
Package / CaseSOIC-8
Slew Rate2.5 V/us
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