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AD8222ACPZ-RL Datasheet(PDF) 1 Page - Analog Devices |
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AD8222ACPZ-RL Datasheet(HTML) 1 Page - Analog Devices |
1 / 24 page Precision, Dual-Channel Instrumentation Amplifier AD8222 Rev. 0 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 ©2006 Analog Devices, Inc. All rights reserved. FEATURES Two channels in small 4 mm × 4 mm LFCSP Gain set with 1 resistor per amplifier (G = 1 to 10,000) Low noise 8 nV/√Hz @ 1 kHz 0.25 μV p-p (0.1 Hz to 10 Hz) High accuracy dc performance (B grade) 60 μV maximum input offset voltage 0.3 μV/°C maximum input offset drift 1.0 nA maximum input bias current 126 dB minimum CMRR (G = 100) Excellent ac performance 150 kHz bandwidth (G = 100) 13 μs settling time to 0.001% Differential output option (single channel) Fully specified Adjustable common-mode output Supply range: ±2.3 V to ±18 V APPLICATIONS Multichannel data acquisition for ECG and medical instrumentation Industrial process controls Wheatstone bridge sensors Differential drives for High resolution input ADCs Remote sensors FUNCTIONAL BLOCK DIAGRAM AD8222 1 2 3 4 12 11 10 9 56 7 8 13 14 15 16 –IN1 RG1 RG1 +IN1 –IN2 RG2 RG2 +IN2 Figure 1. 4mm × 4 mm LFCSP Table 1. In Amps and Differential Amplifier by Category High Performance Low Cost High Voltage Mil Grade Low Power Digital Prog Gain AD8221 AD82201 AD8222 AD85531 AD6231 AD628 AD629 AD620 AD621 AD524 AD526 AD624 AD6271 AD85551 AD85561 AD85571 1 Rail-to-rail output. GENERAL DESCRIPTION The AD8222 is a dual-channel, high performance instrumentation amplifier that requires only one external resistor per amplifier to set gains of 1 to 10,000. The AD8222 is the first dual-instrumentation amplifier in the small 4 mm × 4mm LFCSP. It requires the same board area as a typical single instrumentation amplifier. The smaller package allows a 2× increase in channel density and a lower cost per channel, all with no compromise in performance. The AD8222 can also be configured as a single-channel, differential output instrumentation amplifier. Differential outputs provide high noise immunity, which can be useful when the output signal must travel through a noisy environment, such as with remote sensors. The configuration can also be used to drive differential input ADCs. The AD8222 maintains a minimum CMRR of 80 dB to 4 kHz for all grades at G = 1. High CMRR over frequency allows the AD8222 to reject wideband interference and line harmonics, greatly simplifying filter requirements. The AD8222 also has a typical CMRR drift over temperature of just 0.07 μV/V/°C at G = 1. The AD8222 operates on both single and dual supplies and only requires 2.2 mA maximum supply current for both amplifiers. It is specified over the industrial temperature range of −40°C to +85°C and is fully RoHS compliant. For a single-channel version, see the AD8221. |
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