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OPA129PB Datasheet(PDF) 1 Page - Texas Instruments |
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OPA129PB Datasheet(HTML) 1 Page - Texas Instruments |
1 / 15 page Ultra-Low Bias Current Difet® OPERATIONAL AMPLIFIER FEATURES q ULTRA-LOW BIAS CURRENT: 100fA max q LOW OFFSET: 2mV max q LOW DRIFT: 10 µV/°C max q HIGH OPEN-LOOP GAIN: 94dB min q LOW NOISE: 15nV/ √Hz at 10kHz q PLASTIC DIP AND SO PACKAGES APPLICATIONS q PHOTODETECTOR PREAMPS q CHROMATOGRAPHY q ELECTROMETER AMPLIFIERS q MASS SPECTROMETERS q pH PROBE AMPLIFIERS q 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. +In Output 6 Noise-Free Cascode 7 5 V– V+ 30k Ω 30k Ω –In 3 2 Simplified Circuit 8 Substrate OPA 129 OPA129 OPA129 SBOS026A – JANUARY 1994 – REVISED APRIL 2007 www.ti.com PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 1994–2007, Texas Instruments Incorporated 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. All other trademarks are the property of their respective owners. |
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