Single Axis SPI Inertial Sensor
Freescale Semiconductor Technical Data
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MMA685x Rev 1, 05/2010
Single Axis SPI Inertial Sensor
MMA...
Description
Freescale Semiconductor Technical Data
www.DataSheet4U.com
MMA685x Rev 1, 05/2010
Single Axis SPI Inertial Sensor
MMA685x is a SPI-based, single axis, medium-g, over-damped lateral accelerometer designed for use in automotive airbag systems. Features ±20g to ±120 g full-scale range 3.3 V or 5 V single supply operation SPI-compatible serial interface 10-bit digital signed or unsigned SPI data output Programmable arming functions Twelve low-pass filter options, ranging from 50 Hz to 1000 Hz Optional offset cancellation with > 6s averaging period and < 0.25 LSB/s slew rate Pb-Free 16-Pin QFN-6x6 Package SINGLE AXIS SPI INERTIAL SENSOR
MMA685x
Bottom View
Referenced Documents AEC-Q100, Revision G, dated May 14, 2007
16-PIN QFN CASE 1477-02
Top View
VSSA VSSA 12 CS 11 MOSI 10 SCLK 9 VCC 5 N/C 6 ARM/PCM 7 TEST/VPP 8 MISO N/C N/C
ORDERING INFORMATION
Device MMA6851QR2 MMA6852QR2 MMA6853QR2 MMA6854QR2 MMA6855QR2 MMA6856QR2 Axis X X X X X X Axis Range ±25g ±35g ±50g ±75g ±120g ±60g Shipping Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel
16 15 14 13 VREGA 1 VSS 2 VREG 3 VSS 4 17
PIN CONNECTIONS
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VCC
VCC VREG VREGA
CS SCLK MOSI MISO
CS_A SCLK1 MOSI1 MISO1
CS_D SCLK2 MOSI2 MISO2
CS SCLK MOSI MISO
C1
C2
C3
MMA685x
VSSA VSS
VPP/TEST ARM
Main MCU
Deployment IC
DEPLOY_EN
Figure 1. Application Diagram Table 1. External Component Recommendations
Re...
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