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ADXL180 Datasheet(PDF) 1 Page - Analog Devices |
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ADXL180 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 56 page  Configurable, High g, iMEMS Accelerometer ADXL180 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 ©2008 Analog Devices, Inc. All rights reserved. FEATURES Wide sensor range: 50 g to 500 g Adjustable filter bandwidth: 100 Hz to 800 Hz Configurable communication protocol 2-wire, current mode bus interface Selectable sensor data resolution: 8 bit or 10 bit Continuous auto-zero Fully differential sensor and interface circuitry High resistance to EMI/RFI Sensor self-test 5.0 V to 14.5 V operation 8 bits of user-defined OTP memory 32-bit electronic serial number Dual device per bus option APPLICATIONS Crash sensing GENERAL DESCRIPTION The ADXL180 iMEMS® accelerometer is a configurable, single axis, integrated satellite sensor that enables low cost solutions for front and side impact airbag applications. Acceleration data is sent to the control module via a digital 2-wire current loop interface bus. The communication protocol is programmable for compatibility with various automotive interface bus standards. The sensor g range is configurable to provide full-scale ranges from ±50 g to ±500 g. The sensor signal third-order, low-pass Bessel filter bandwidth is configurable at 100 Hz, 200 Hz, 400 Hz, and 800 Hz. The 10-bit analog-to-digital converter (ADC) allows either 8-bit or 10-bit acceleration data to be transmitted to the control module. Each part has a unique electronic serial number. The device is rated for operation from −40°C to +125°C and is available in a 5 mm × 5 mm LFCSP package. FUNCTIONAL BLOCK DIAGRAM VBN VDD ADXL180 VBP 3-POLE BESSEL FILTER TRIMS 10- BIT ADC VOLTAGE REGULATOR COMM INTERFACE SERIAL PORT STATE MACHINE SERIAL NUMBER SUPPLY MONITOR AUTO- ZERO SYNC DETECT PROGRAM INTERFACE CONFIGURATION DATA OTP FUSE ROM VBC SELF- TEST DIFF SENSOR MOD OSCILLATOR/ TIMING GENERATOR V/Q DEMOD AMP VCM REF VSCO VCM VSCI Figure 1. |
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