High Precision, Low-g, Digital Z-Axis Accelerometer ADXL701 Data Sheet FEATURES GENERAL DESCRIPTION High performance, z-axis digital output accelerometer ±14.2 g full-scale range at 16-bit resolution (0.434 mg/LSB) 2 kHz output sample rate with optional data FIFOs Programmable filter response 20 Hz, 46 Hz, 92 Hz, 184 Hz Continuous electromechanical self test Additional key-on and on demand self test routines Z-axis offset adjust Low quiescent current draw High linearity performance Qualified for automotive applications −40°C to +105°C temperature range The ADXL701 device is a high precision, single z-axis accelerometer designed for vehicle rollover detection and other high performance applications. The ADXL701 provides offset stability to better than ±500 mg and sensitivity stability to better than 5% across the entire temperature range. The ADXL701 is designed with selectable −3 dB filter corner frequencies to satisfy a range of applications, and the 2 kHz output data rate allows sufficient oversampling of the acceleration information. The acceleration data output from the device is a true 16-bit word and is contained in a 32-bit SPI transaction. The SPI interface contains additional fault detection bits and data formatting bits designed to assist high reliability applications. SPI communications are compatible up to 8 MHz. The 16-bit acceleration data-word offers a resolution of 0.434 mg/LSB for the ±14.2 g full-scale range of the device. APPLICATIONS Vehicle rollover detection Platform stabilization/leveling The ADXL701 is available in an SOIC package with an inverted paddle for improved EMI/RFI robustness. The ADXL701 operates at nominal power supplies of 3.3 V and 5 V, and is specified to operate across the full automotive temperature range of −40°C to +105°C. FUNCTIONAL BLOCK DIAGRAM TEMP SENSOR Σ-Δ MOD SENSOR DRIVERS SELF TEST THIRD-ORDER SINC FILTER THIRD-ORDER SINC FILTER IIR FILTER CALIBRATION CS IIR FILTER DSP TIMING GEN CALIBRATION ERROR FLAGS ERROR HANDLER POR ADXL701 CAL COEFFICIENT GENERATION FORMAT OTP SERIAL NUMBER CONFIG TRIM COEFFICIENT MOSI MISO IOVDD DVDD CONTROL REGISTER MASTER DSP STATE MACHINE VDD MONITOR CLOCK SCLK FORMAT BYPASS VDD REG REFERENCE REGVDD AVDD REGGND IOGND VCM 12411-001 Σ-Δ MOD SPI INTERFACE Z AFE Figure 1. For more information about the ADXL701, please contact the Analog Devices, Inc., Customer Interaction Center at http://www.analog.com/en/content/technical_support_page/fca.html to connect with a technical support specialist. Rev. SpA Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility isassumed by Analog Devices for itsuse, nor for any infringementsofpatentsor other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2015 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com ADXL701 Data Sheet NOTES ©2015 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D12411F-0-11/15(SpA) www.analog.com/ADXL701 Rev. SpA | Page 2 of 2