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AD627BRZ-RL 데이터시트(PDF) 1 Page - Analog Devices |
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AD627BRZ-RL 데이터시트(HTML) 1 Page - Analog Devices |
1 / 24 page Micropower, Single- and Dual-Supply, Rail-to-Rail Instrumentation Amplifier AD627 Rev. D Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other 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 ©2007 Analog Devices, Inc. All rights reserved. FEATURES Micropower, 85 μA maximum supply current Wide power supply range (+2.2 V to ±18 V) Easy to use Gain set with one external resistor Gain range 5 (no resistor) to 1000 Higher performance than discrete designs Rail-to-rail output swing High accuracy dc performance 0.03% typical gain accuracy (G = +5) (AD627A) 10 ppm/°C typical gain drift (G = +5) 125 μV maximum input offset voltage (AD627B dual supply) 200 μV maximum input offset voltage (AD627A dual supply) 1 μV/°C maximum input offset voltage drift (AD627B) 3 μV/°C maximum input offset voltage drift (AD627A) 10 nA maximum input bias current Noise: 38 nV/√Hz RTI noise @ 1 kHz (G = +100) Excellent ac specifications AD627A: 77 dB minimum CMRR (G = +5) AD627B: 83 dB minimum CMRR (G = +5) 80 kHz bandwidth (G = +5) 135 μs settling time to 0.01% (G = +5, 5 V step) APPLICATIONS 4 to 20 mA loop-powered applications Low power medical instrumentation—ECG, EEG Transducer interfacing Thermocouple amplifiers Industrial process controls Low power data acquisition Portable battery-powered instruments FUNCTIONAL BLOCK DIAGRAM AD627 1 2 3 4 RG –IN +IN –VS RG +VS OUTPUT REF 8 7 6 5 Figure 1. 8-Lead PDIP (N) and SOIC_N (R) TRADITIONAL LOW POWER DISCRETE DESIGN AD627 100 90 80 70 60 50 40 30 20 10 0 1 10 100 FREQUENCY (Hz) 1k 10k Figure 2. CMRR vs. Frequency, ±5 VS, Gain = +5 GENERAL DESCRIPTION The AD627 is an integrated, micropower instrumentation amplifier that delivers rail-to-rail output swing on single and dual (+2.2 V to ±18 V) supplies. The AD627 provides excellent ac and dc specifications while operating at only 85 μA maximum. The AD627 offers superior flexibility by allowing the user to set the gain of the device with a single external resistor while con- forming to the 8-lead industry-standard pinout configuration. With no external resistor, the AD627 is configured for a gain of 5. With an external resistor, it can be set to a gain of up to 1000. A wide supply voltage range (+2.2 V to ±18 V) and micropower current consumption make the AD627 a perfect fit for a wide range of applications. Single-supply operation, low power consumption, and rail-to-rail output swing make the AD627 ideal for battery-powered applications. Its rail-to-rail output stage maximizes dynamic range when operating from low supply voltages. Dual-supply operation (±15 V) and low power consumption make the AD627 ideal for industrial applications, including 4 to 20 mA loop-powered systems. The AD627 does not compromise performance, unlike other micropower instrumentation amplifiers. Low voltage offset, offset drift, gain error, and gain drift minimize errors in the system. The AD627 also minimizes errors over frequency by providing excellent CMRR over frequency. Because the CMRR remains high up to 200 Hz, line noise and line harmonics are rejected. The AD627 provides superior performance, uses less circuit board area, and costs less than micropower discrete designs. |
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