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OPA129TI/BBN/a5avaiUltra-Low Bias Current Difet OPERATIONAL AMPLIFIER
OPA129PTIN/a2avaiUltra-Low Bias Current Difet® Operational Amplifier
OPA129UBBN/a9avaiUltra-Low Bias Current Difet® Operational Amplifier
OPA129UBBBN/a211avaiUltra-Low Bias Current Difet® Operational Amplifier
OPA129UBN/a100avaiUltra-Low Bias Current Difet® Operational Amplifier
OPA129UBG4TI/BBN/a5avaiUltra-Low Bias Current Difet Operational Amplifier 8-SOIC -40 to 125
OPA129UE4BBN/a3avaiUltra-Low Bias Current Difet Operational Amplifier 8-SOIC -40 to 125


OPA129UB ,Ultra-Low Bias Current Difet® Operational AmplifierSPECIFICATIONSELECTRICALAt V = ±15V and T = +25°C, unless otherwise noted. Pin 8 connected to groun ..
OPA129UB ,Ultra-Low Bias Current Difet® Operational Amplifier(1)PACKAGE INFORMATIONABSOLUTE
OPA129UBG4 ,Ultra-Low Bias Current Difet Operational Amplifier 8-SOIC -40 to 125MAXIMUM RATINGSPRODUCT PACKAGE-LEAD PACKAGE DESIGNATORPower Supply Voltage ....... ±18VDifferential ..
OPA129UE4 ,Ultra-Low Bias Current Difet Operational Amplifier 8-SOIC -40 to 125.CONNECTION DIAGRAMTop View DIP/SOELECTROSTATICNC 1 8 SubstrateDISCHARGE SENSITIVITY–In 2 7 V+OPAAn ..
OPA130 ,Low Power, Precision FET-INPUT OPERATIONAL AMPLIFIERSFEATURESOPA130* LOW QUIESCENT CURRENT: 530µ A/ampOffset Trim 1 8 NC* LOW OFFSET VOLTAGE: 1mV max–In ..
OPA130UA ,Low Power, Precision FET-Input Operational AmplifiersELECTRICAL CHARACTERISTICSAt T = +25°C, V = ±15V, and R = 10kΩ , unless otherwise noted.A S LOPA130 ..
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OPA129-OPA129P-OPA129U-OPA129UB-OPA129UBG4-OPA129UE4
Ultra-Low Bias Current Difet Operational Amplifier 8-SOIC -40 to 125
Ultra-Low Bias Current Difet®
OPERATIONAL AMPLIFIER
FEA TURES
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 SO PACKAGES
APPLICA TIONS
PHOTODETECTOR PREAMPS CHROMATOGRAPHY ELECTROMETER AMPLIFIERS MASS SPECTROMETERS pH PROBE AMPLIFIERS ION GAGE MEASUREMENT
DESCRIPTION

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.
OPA129

SBOS026A – JANUARY 1994 – REVISED APRIL 2007
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Difet is a registered trademark of Texas Instruments.
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