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AD8224HACPZ-R7 Scheda tecnica(PDF) 1 Page - Analog Devices |
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AD8224HACPZ-R7 Scheda tecnica(HTML) 1 Page - Analog Devices |
1 / 28 page Precision, Dual-Channel, JFET Input, Rail-to-Rail Instrumentation Amplifier AD8224 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 ©2007–2010 Analog Devices, Inc. All rights reserved. FEATURES Two channels in a small 4 mm × 4 mm LFCSP Custom LFCSP package with hidden paddle Permits routing and vias underneath package Allows full bias current performance Low input currents 10 pA maximum input bias current (B Grade) 0.6 pA maximum input offset current (B Grade) High CMRR 100 dB CMRR (minimum), G = 10 (B Grade) 90 dB CMRR (minimum) to 10 kHz, G = 10 (B Grade) Excellent ac specifications and low power 1.5 MHz bandwidth (G = 1) 14 nV/√Hz input noise (1 kHz) Slew rate: 2 V/μs 750 μA quiescent current per amplifier Versatility Rail-to-rail output Input voltage range to below negative supply rail 4 kV ESD protection 4.5 V to 36 V single supply ±2.25 V to ±18 V dual supply Gain set with single resistor (G = 1 to 1000) APPLICATIONS Medical instrumentation Precision data acquisition Transducer interfaces Differential drives for high resolution input ADCs Remote sensors FUNCTIONAL BLOCK DIAGRAM AD8224 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. Table 1. In Amps and Difference Amplifiers by Category High Perform Low Cost High Voltage Mil Grade Low Power Digital Gain AD82201 AD85531 AD628 AD620 AD6271 AD82311 AD8221 AD6231 AD629 AD621 AD8250 AD8222 AD524 AD8251 AD526 AD85551 AD624 AD85561 AD85571 1 Rail-to-rail output. GENERAL DESCRIPTION The AD8224 is the first single-supply, JFET input instrumentation amplifier available in the space-saving 16-lead, 4 mm × 4 mm LFCSP. It requires the same board area as a typical single instrumentation amplifier yet doubles the channel density and offers a lower cost per channel without compromising performance. Designed to meet the needs of high performance, portable instrumentation, the AD8224 has a minimum common-mode rejection ratio (CMRR) of 86 dB at dc and a minimum CMRR of 80 dB at 10 kHz for G = 1. Maximum input bias current is 10 pA and typically remains below 300 pA over the entire industrial temperature range. Despite the JFET inputs, the AD8224 typically has a noise corner of only 10 Hz. With the proliferation of mixed-signal processing, the number of power supplies required in each system has grown. Designed to alleviate this problem, the AD8224 can operate on a ±18 V dual supply, as well as on a single +5 V supply. The device’s rail- to-rail output stage maximizes dynamic range on the low voltage supplies common in portable applications. Its ability to run on a single 5 V supply eliminates the need for higher voltage, dual supplies. The AD8224 draws 750 μA of quiescent current per amplifier, making it ideal for battery powered devices. In addition, the AD8224 can 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. For a single-channel version, use the AD8220. |
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