Document Number: MMA81XXEG Freescale Semiconductor Rev 5, 04/2010 Technical Data Digital X-Axis or Z-Axis MMA81XXEG Accelerometer MMA82XXEG The MMA81XXEG (Z-axis) and MMA82XXEG/MMA82XXTEG (X-axis) are members of Freescales family of DSI 2.0-compatible accelerometers. These MMA82XXTEG devices incorporate digital signal processing for filtering, trim and data SERIES formatting. Features SINGLE-AXIS Available in 20g, 40g, 150g, and 250g (MMA82XXEG, X-axis), DSI 2.0 50g and 100g (MMA82XXTEG, X-axis) and 40g, 100g, 150g, and ACCELEROMETER 250g (MMA81XXEG, Z-axis). Additional g-ranges may be available upon request 80 customer-accessible OTP bits 10-bit digital data output from 8 to 10 bit DSI output 6.3 to 30 V supply voltage On-chip voltage regulator Internal self-test EG SUFFIX (Pb-free) 16-LEAD SOIC Minimal external component requirements CASE 475-01 RoHS compliant (-40 to +125C) 16-pin SOIC package Automotive AEC-Q100 qualified DSI 2.0 Compliant PIN CONNECTIONS Z-axis transducer is overdamped Typical Applications N/C116 V SS N/C215 V Crash detection (Airbag) SS C 314 BUSRTN REG Impact and vibration monitoring V /TEST413 BUSIN PP Shock detection. C 512 BUSOUT FIL D 611 H OUT CAP V /D 710 V GND IN SS CLK89 C REG 16-PIN SOIC PACKAGE Freescale Semiconductor, Inc., 2009, 2010. All rights reserved.ORDERING INFORMATION Device Name X-axis g-Level Z-axis g-Level Temperature Range SOIC 16 Package Packaging MMA8225EGR2 250 -40 to +125C 475-01 Tape & Reel MMA8225EG 250 -40 to +125C 475-01 Tubes MMA8215EGR2 150 -40 to +125C 475-01 Tape & Reel MMA8215EG 150 -40 to +125C 475-01 Tubes MMA8210TEGR2 100 -40 to +125C 475-01 Tape & Reel MMA8210TEG 100 -40 to +125C 475-01 Tubes MMA8205TEGR2 50 -40 to +125C 475-01 Tape & Reel MMA8205TEG 50 -40 to +125C 475-01 Tubes MMA8204EGR2 40 -40 to +125C 475-01 Tape & Reel MMA8204EG 40 -40 to +125C 475-01 Tubes MMA8202EGR2 20 -40 to +125C 475-01 Tape & Reel MMA8202EG 20 -40 to +125C 475-01 Tubes MMA8125EGR2 250 -40 to +125C 475-01 Tape & Reel MMA8125EG 250 -40 to +125C 475-01 Tubes MMA8115EGR2 150 -40 to +125C 475-01 Tape & Reel MMA8115EG 150 -40 to +125C 475-01 Tubes MMA8110EGR2 100 -40 to +125C 475-01 Tape & Reel MMA8110EG 100 -40 to +125C 475-01 Tubes MMA8104EGR2 40 -40 to +125C 475-01 Tape & Reel MMA8104EG 40 -40 to +125C 475-01 Tubes SECTION 1 GENERAL DESCRIPTION MMA81XXEG/MMA82XXEG/MMA82XXTEG family is a satellite accelerometer which is comprised of a single axis, variable ca- pacitance sensing element with a single channel interface IC. The interface IC converts the analog signal to a digital format which is transmitted in accordance with the DSI-2.0 specification. 1.1 OVERVIEW Signal conditioning begins with a Capacitance to Voltage conversion (C to V) followed by a 2-stage switched capacitor amplifier. This amplifier has adjustable offset and gain trimming and is followed by a low-pass switched capacitor filter with Bessel function. Offset and gain of the interface IC are trimmed during the manufacturing process. Following the filter the signal passes to the output stage. The output stage sensitivity incorporates temperature compensation. The output of the accelerometer signal conditioning is converted to a digital signal by an A/D converter. After this conversion the resultant digital word is converted to a serial data stream which may be transmitted via the DSI bus. Power for the device is derived from voltage applied to the BUSIN/BUSOUT and V pins. Bus voltage is rectified and applied to an external capacitor SS connected to the H pin. During data transmissions, the device operates from stored charge on the external capacitor. An CAP integrated regulator supplies fixed voltage to internal circuitry. A self-test voltage may be applied to the electrostatic deflection plate in the sensing element. Self-Test voltage is factory trimmed. Other support circuits include a bandgap voltage reference for the bias sources and the self-test voltage. A total of 128 bits of One-Time Programmable (OTP) memory, are provided for storage of factory trim data, serial number and device characteristics. Eighty OTP bits are available for customer programming. These eighty OTP bits may be programmed via the DSI Bus or through the serial test/trim interface. OTP integrity is verified through continuous parity checking. Separate parity bits are provided for factory and customer programmed data. In the event that a parity fault is detected, the reserved value of zero is transmitted in response to a Read Acceleration Data command. A block diagram illustrating the major elements of the device is shown in Figure 1-1. MMA81XXEG Sensors 2 Freescale Semiconductor