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AD823AARMZ-R7 Datenblatt(PDF) 1 Page - Analog Devices |
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AD823AARMZ-R7 Datenblatt(HTML) 1 Page - Analog Devices |
1 / 20 page Wide Supply Dual, 17 MHz, Rail-to-Rail FET Input Amplifier Data Sheet AD823A Rev. B 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 ©2012 Analog Devices, Inc. All rights reserved. FEATURES Single-supply operation Output swings rail-to-rail Input voltage range extends below ground Single-supply capability from 3 V to 36 V High load drive Capacitive load drive of 470 pF (G = +1, 25% overshoot) Linear output current of 40 mA, 0.5 V from supplies Excellent ac performance on 2.6 mA/amplifier −3 dB bandwidth of 17 MHz, G = +1 325 ns settling time to 0.01% (2 V step) Slew rate of 30 V/μs Low distortion: −108 dBc at 20 kHz (G = −1, RL = 2 kΩ) Good dc performance 700 μV maximum input offset voltage 1 μV/°C offset voltage drift 25 pA maximum input bias current Low noise: 14 nV/√Hz at 10 kHz No phase inversion with inputs to the supply rails APPLICATIONS Photodiode preamps Active filters 12-bit to 16-bit data acquisition systems Medical instrumentation Precision instrumentation GENERAL DESCRIPTION The AD823A is a dual precision, 17 MHz, JFET input op amp manufactured in the extra fast complementary bipolar (XFCB) process. The AD823A can operate from a single supply of 3 V to 36 V or from dual supplies of ±1.5 V to ±18 V. It has true single-supply capability with an input voltage range extending below ground in single-supply mode. Output voltage swing extends to within 20 mV of each rail for IOUT ≤ 100 μA, providing outstanding output dynamic range. It also has a linear output current of 40 mA, 0.5 V from the supply rails. An offset voltage of 700 μV maximum, an offset voltage drift of 1 μV/°C, and typical input bias currents of 0.3 pA provide dc precision with source impedances up to 1 GΩ. The AD823A provides 17 MHz, −3 dB bandwidth, and a 30 V/μs slew rate with a low supply current of only 2.6 mA per amplifier. It also provides low input voltage noise of 14 nV/√Hz and −108 dB SFDR at 20 kHz. The AD823A has low input capacitances (0.6 pF differ- ential and 1.3 pF common mode) and drives more than 500 pF of direct capacitive load as a follower. This lets the amplifier handle a wide range of load conditions. CONNECTION DIAGRAM AD823A OUT1 +IN2 –IN2 OUT2 +VS –IN1 +IN1 –VS 1 2 3 4 8 7 6 5 Figure 1. 8-Lead SOIC OUT1 1 –IN1 2 +IN1 3 –VS 4 +VS 8 OUT2 7 –IN2 6 +IN2 5 AD823A TOP VIEW (Not to Scale) Figure 2. 8-Lead MSOP 200µs/DIV 500mV/DIV 0V 3.0V 1.5V VS = 3V CL = 50pF G = +1 Figure 3. Output Swing, +VS = +3 V, G = +1 This combination of ac and dc performance, plus the outstanding load drive capability, results in an exceptionally versatile ampli- fier for applications such as ADC drivers, high speed active filters, and other low voltage, high dynamic range systems. The AD823A is available over the industrial temperature range of −40°C to +85°C and is offered in an 8-lead SOIC package and an 8-lead MSOP package. |
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