Document Number: MMA685x Freescale Semiconductor Rev. 5, 03/2012 Data Sheet: Technical Data Single-Axis SPI Inertial Sensor MMA685x MMA685x, a SafeAssure solution, is a SPI-based, single-axis, medium-g, over- damped lateral accelerometer designed for use in automotive airbag systems. Features Bottom View 20g to 120g full-scale range 3.3V or 5V single supply operation SPI-compatible serial interface 10-bit digital signed or unsigned SPI data output Programmable arming functions 12 low-pass filter options, ranging from 50 Hz to 1000 Hz Optional offset cancellation with > 6s averaging period and < 0.25 LSB/s slew 16 LEAD QFN rate 6 mm by 6 mm Pb-Free 16-Pin QFN-6 by 6 Package CASE 2086-01 Referenced Documents Top View AECQ100, Revision G, dated May 14, 2007 (xxxxxxx xxxxxxx Application Diagram V CC V CS CS A CS D CS CC V SCLK SCLK1 SCLK2 SCLK REG V MOSI MOSI1 MOSI2 MOSI REGA MISO MISO MISO1 MISO2 C1 C2 C3 Main MCU Deployment IC MMA685x V SSA ARM DEPLOY EN V SS V /TEST PP Figure 1. Application Diagram Table 1. External Component Recommendations Ref Des Type Description Purpose C1 Ceramic 0.1 F, 10%, 10V Minimum, X7R V Power Supply Decoupling CC C2 Ceramic 1 F, 10%, 10V Minimum, X7R Voltage Regulator Output Capacitor (C ) REG C3 Ceramic 1 F, 10%, 10V Minimum, X7R Voltage Regulator Output Capacitor (C ) REGA Device Orientation xxxxxxx xxxxxxx X: 0g X: -1g X: 0g X: 0g X: 0g X: +1g EARTH GROUND Figure 2. Device Orientation Diagram MMA685x Sensors 2 Freescale Semiconductor, Inc. xxxxxxx xxxxxxx xxxxxxx xxxxxxx