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AD623ARM-REEL Datasheet(PDF) 1 Page - Analog Devices |
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AD623ARM-REEL Datasheet(HTML) 1 Page - Analog Devices |
1 / 24 page Single-Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier AD623 Rev. D 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 ©1997–2008 Analog Devices, Inc. All rights reserved. FEATURES Easy to use Higher performance than discrete design Single-supply and dual-supply operation Rail-to-rail output swing Input voltage range extends 150 mV below ground (single supply) Low power, 550 μA maximum supply current Gain set with one external resistor Gain range: 1 (no resistor) to 1000 High accuracy dc performance 0.10% gain accuracy (G = 1) 0.35% gain accuracy (G > 1) 10 ppm maximum gain drift (G = 1) 200 μV maximum input offset voltage (AD623A) 2 μV/°C maximum input offset drift (AD623A) 100 μV maximum input offset voltage (AD623B) 1 μV/°C maximum input offset drift (AD623B) 25 nA maximum input bias current Noise: 35 nV/√Hz RTI noise @ 1 kHz (G = 1) Excellent ac specifications 90 dB minimum CMRR (G = 10); 70 dB minimum CMRR (G = 1) at 60 Hz, 1 kΩ source imbalance 800 kHz bandwidth (G = 1) 20 μs settling time to 0.01% (G = 10) APPLICATIONS Low power medical instrumentation Transducer interfaces Thermocouple amplifiers Industrial process controls Difference amplifiers Low power data acquisition GENERAL DESCRIPTION The AD623 is an integrated single-supply instrumentation amplifier that delivers rail-to-rail output swing on a 3 V to 12 V supply. The AD623 offers superior user flexibility by allowing single gain set resistor programming and by conforming to the 8-lead industry standard pinout configuration. With no external resistor, the AD623 is configured for unity gain (G = 1), and with an external resistor, the AD623 can be programmed for gains up to 1000. CONNECTION DIAGRAM 1 –RG 8 +RG 2 –IN 7 +VS 3 +IN 6 OUTPUT 4 –VS 5 REF AD623 TOP VIEW (Not to Scale) Figure 1. 8-Lead PDIP (N), SOIC (R), and MSOP (RM) Packages 120 30 40 50 60 70 80 90 100 110 1 10 100 1k 10k 100k FREQUENCY (Hz) ×1000 ×100 ×10 ×1 Figure 2. CMR vs. Frequency, 5 VS, 0 VS The AD623 holds errors to a minimum by providing superior ac CMRR that increases with increasing gain. Line noise, as well as line harmonics, are rejected because the CMRR remains constant up to 200 Hz. The AD623 has a wide input common- mode range and can amplify signals that have a common-mode voltage 150 mV below ground. Although the design of the AD623 was optimized to operate from a single supply, the AD623 still provides superior performance when operated from a dual voltage supply (±2.5 V to ±6.0 V). Low power consumption (1.5 mW at 3 V), wide supply voltage range, and rail-to-rail output swing make the AD623 ideal for battery-powered applications. The rail-to-rail output stage maximizes the dynamic range when operating from low supply voltages. The AD623 replaces discrete instrumentation amplifier designs and offers superior linearity, temperature stability, and reliability in a minimum of space. |
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