Document Number: MMA51xxKW
Freescale Semiconductor
Rev. 11, 08/2012
Data Sheet: Technical Data
Xtrinsic MMA51xxKW
PSI5 Inertial Sensor
MMA51xxKW
The MMA51xxKW family, a SafeAssure solution, includes the AKLV27 and PSI5
Version 1.3 compatible overdamped Z-axis satellite accelerometers.
Features Bottom View
60g to 480g Full-Scale Range
Selectable 400 Hz, 3-Pole, or 4-pole Low-Pass Filter
Single Pole High Pass Filter with Fast Startup and Output Rate Limiting
PSI5 Version 1.3 Compatible
PSI5-P10P-500/3L Compatible
Programmable Time Slots with 0.5 s Resolution
Selectable Baud Rate: 125 kBaud or 190.5 kBaud 16-PIN QFN
CASE 2086-01
Selectable Data Length: 8 or 10 bits
Selectable Error Detection: Even Parity, or 3-bit CRC
Optional Daisy Chain with External Low-Side Switch
Two-Wire Programming Mode
Top View
16 s Internal Sample Rate, with Interpolation to 1 s
Pb-Free 16-Pin QFN, 6 by 6 Package
Qualified AECQ100, Revision G, Grade 1 (-40C to +125C)
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Application Diagram
VV
V
BUF CE
V
V
BUF CC
R1
V
I
REG
DATA
R2
MMA51xx
V
REGA
C2
C3
C1
CS V
C4 C5 C6
SSA
V
SS
SCLK
V
SS
DO
R3
M1
Note: Pin names and references
BUS_SW
DI
may differ from PSI5 V1.3
Optional for
V
SS_OUT
PCM
pin names and references Daisy Chain
Figure 1. Application Diagram
External Component Recommendations
Ref Des Type Description Purpose
C1 Ceramic 2.2 nF, 10%, 50V minimum, X7R V Power Supply Decoupling and Signal Damping
CC
C3 Ceramic 470 pF, 10%, 50V minimum, X7R I Filtering and Signal Damping
DATA
C2 Ceramic 15 nF, 10%, 50V minimum, X7R V Power Supply Decoupling
CC
C4, C5, C6 Ceramic 1 F, 10%, 10V minimum, X7R Voltage Regulator Output Capacitor(s)
R1 General Purpose 82, 5%, 200 PPM V Filtering and Signal Damping
CC
R2 General Purpose 27, 5%, 200 PPM I Filtering and Signal Damping
DATA
R3 General Purpose 20 k, 5%, 200 PPM Gate Resistor for External Low-Side Daisy Chain FET
M1 N-Channel MOSFET Low-Side Daisy Chain Transistor
Device Orientation
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Z: 0g Z: 0g Z: 0g Z: +1g Z: -1g
Z: 0g
EARTH GROUND
Figure 2. Device Orientation Diagram
MMA51xxKW
Sensors
2 Freescale Semiconductor, Inc.
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