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AD795JRZ-REEL7 Datasheet(PDF) 1 Page - Analog Devices |
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AD795JRZ-REEL7 Datasheet(HTML) 1 Page - Analog Devices |
1 / 20 page Low Power, Low Noise Precision FET Op Amp AD795 Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2002–2009 Analog Devices, Inc. All rights reserved. FEATURES Low power replacement for Burr-Brown OPA111, OPA121 op amps Low noise 3.3 μV p-p maximum, 0.1 Hz to 10 Hz 11 nV/√Hz maximum at 10 kHz 0.6 fA/√Hz at 1 kHz High dc accuracy 500 μV maximum offset voltage 10 μV/°C maximum drift 2 pA maximum input bias current Low power: 1.5 mA maximum supply current APPLICATIONS Low noise photodiode preamps CT scanners Precision l-to-V converters CONNECTION DIAGRAM NC 1 –IN 2 +IN 3 –VS 4 NC 8 +VS 7 OUTPUT 6 NC 5 NC = NO CONNECT AD795 Figure 1. 8-Lead SOIC (R) Package GENERAL DESCRIPTION The AD795 is a low noise, precision, FET input operational amplifier. It offers both the low voltage noise and low offset drift of a bipolar input op amp and the very low bias current of a FET- input device. The 1014 Ω common-mode impedance insures that input bias current is essentially independent of common- mode voltage and supply voltage variations. The AD795 has both excellent dc performance and a guaranteed and tested maximum input voltage noise. It features 2 pA maximum input bias current and 500 μV maximum offset voltage, along with low supply current of 1.5 mA maximum. 1k 100 10 1 10 100 1k 10k FREQUENCY (Hz) Figure 2. Voltage Noise Spectral Density Furthermore, the AD795 features a guaranteed low input noise of 3.3 μV p-p (0.1 Hz to 10 Hz) and a 11 nV/√Hz maximum noise level at 10 kHz. The AD795 has a fully specified and tested input offset voltage drift of only 10 μV/°C maximum. The AD795 is useful for many high input impedance, low noise applications. The AD795 is rated over the commercial tempera- ture range of 0°C to +70°C. The AD795 is available in an 8-lead SOIC package. 50 40 30 20 10 0 –5 –4 –3 –2 –1 0 1 2 3 4 5 INPUT OFFSET VOLTAGE DRIFT (µV/°C) SAMPLE SIZE = 570 Figure 3. Typical Distribution of Average Input Offset Voltage Drift |
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