Data Sheet High Precision, Low-g, Digital Triaxial Accelerometer ADXL703 FEATURES GENERAL DESCRIPTION High performance, triaxial 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 Temperature compensated, high precision zero-g bias and sensitivity performance X-/Y-/Z-axis offset adjust Low quiescent current draw High linearity performance Qualified for automotive applications −40°C to +105°C temperature range The ADXL703 device is a high precision, triaxial accelerometer designed for electronic stability control and other high performance applications. A built in temperature compensation routine ensures sensitivity stability to better than ±3% across the entire temperature range. The ADXL703 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. APPLICATIONS 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. Vehicle dynamic control (VDC) Electronic stability program (ESP) Electronic chassis control Platform stabilization/leveling The ADXL703 is available in an SOIC package with an inverted paddle for improved EMI/RFI robustness. The ADXL703 operates at both 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 Σ-Δ MOD THIRD-ORDER SINC FILTER Σ-Δ MOD TEMP SENSOR Σ-Δ MOD SENSOR DRIVERS SELF TEST THIRD-ORDER SINC FILTER THIRD-ORDER SINC FILTER IIR FILTER CALIBRATION FORMAT CALIBRATION FORMAT BYPASS IIR FILTER BYPASS SCLK IIR FILTER CALIBRATION FORMAT BYPASS IIR FILTER CALIBRATION CAL COEFFICIENT GENERATION FORMAT CS MOSI MISO IOVDD MASTER DSP STATE MACHINE DSP TIMING GEN VDD MONITOR CLOCK ERROR FLAGS ERROR HANDLER POR ADXL703 DVDD CONTROL REGISTER OTP SERIAL NUMBER CONFIG TRIM COEFFICIENT VDD REG REFERENCE REGVDD AVDD REGGND IOGND VCM 12054-001 Z AFE THIRD-ORDER SINC FILTER SPI INTERFACE X/Y AFE Σ-Δ MOD Figure 1. For more information about the ADXL703, 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 is assumed by Analog Devices for its use, nor for any infringements of patents or 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 ©2014 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com ADXL703 Data Sheet NOTES ©2014 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D12054F-0-7/14(SpA) www.analog.com/ADXL703 Rev. SpA | Page 2 of 2