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AD8235 Arkusz danych(PDF) 1 Page - Analog Devices |
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AD8235 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 20 page 40 μA Micropower Instrumentation Amplifier in WLCSP Package AD8235 Rev. 0 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 Inc. All rights reserved. ©2009 Analog Devices, FEATURES Low power 40 μA maximum supply current 6 nA shutdown current Low input currents 50 pA input bias current 25 pA input offset current High Common Mode Rejection Ratio (CMRR) 110 dB CMRR , G = 100 Space saving WLCSP package Zero input crossover distortion Versatile Rail-to-rail input and output Shutdown Gain set with single resistor (G = 5 to 200) AD8236: μSOIC package version of AD8235 APPLICATIONS Medical instrumentation Low-side current sense Portable electronics GENERAL DESCRIPTION The AD8235 is the smallest and lowest power instrumentation amplifier in the industry. It is available in a 1.5 mm × 2.2 mm wafer level chip scale package (WLCSP). The AD8235 draws a maximum quiescent current of 40 μA. In addition, it draws a maximum 500 nA of current during shutdown mode, making it an excellent instrumentation amplifier for battery powered, portable applications. The AD8235 can operate on supply voltages as low as 1.8 V. The input stage allows for wide rail-to-rail input voltage range without the crossover distortion, common in other designs. The rail-to- rail output enables easy interfacing to ADCs. The AD8235 is an excellent choice for signal conditioning. Its low input bias current of 50 pA and high CMRR of 110 dB (G = 100) offer tremendous value for its size and low power. It is specified over the extended industrial temperature range of −40°C to 125°C. CONNECTION DIAGRAM RG RG REF –IN +IN VOUT 210kΩ 210kΩ 52.5kΩ 52.5kΩ AD8235 C3 +VS RG –VS B3 A1 D1 ESD PROTECTION ESD PROTECTION A3 D3 B1 SDN A2 C1 NC B2 NC D2 ESD PROTECTION ESD PROTECTION ESD PROTECTION OP AMP A OP AMP B ESD PROTECTION TOP VIEW (BALL SIDE DOWN) Not to Scale Figure 1. PIN CONFIGURATION BALL A1 INDICATOR +VS –VS VOUT SDN –IN RG REF NC RG NC NC = NO CONNECT +IN 1 A B C D 23 Figure 2. 11-Ball WLCSP (CB-11-1) 1.0 2.0 4.0 3.0 0.5 1.5 3.5 2.5 0 OUTPUT VOLTAGE (V) 5.0 4.5 5.5 5.0 0.5 –0.5 1.5 2.0 3.0 4.0 4.5 0 1.0 2.5 3.5 G = 5 VS = 5V VREF = 2.5V G = 5 VS = 1.8V VREF = 0.9V Figure 3. Wide Common-Mode Voltage Range vs. Output Voltage |
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