MMA1254
Freescale Semiconductor
Rev 1, 06/2012
Data Sheet: Technical Data
Low-g
MMA1254
Micromachined Accelerometer
The MMA series of silicon capacitive, micromachined accelerometers feature
signal conditioning, a 2-pole low pass filter and temperature compensation.
Zero-g offset full scale span and filter cut-off are factory set and require no
external devices. A full system self-test capability verifies system functionality.
MMA1254: Z-AXIS SENSITIVITY
MICROMACHINED
Features
ACCELEROMETER
Integral Signal Conditioning
5g
Linear Output
2nd Order Bessel Filter
Calibrated Self-test
EPROM Parity Check Status
Transducer Hermetically Sealed at Wafer Level for Superior Reliability
Robust Design, High Shock Survivability
Qualified AECQ100, Rev. F Grade 2 (-40 C/ +105 C)
Typical Applications
Vibration Monitoring and Recording
Appliance Control
16-LEAD SOIC
Mechanical Bearing Monitoring
Pb-FREE
CASE 475-01
Computer Hard Drive Protection
Computer Mouse and Joysticks
Virtual Reality Input Devices
Sports Diagnostic Devices and Systems
ORDERING INFORMATION
Device Name Temperature Range Case No. Package
MMA1254EG 40to 105 C 475-01 SOIC-16
MMA1254EGR2 40to 105 C 475-01 SOIC-16, Tape & Reel
MMA1254KEG* 40to 105 C 475-01 SOIC-16
MMA1254KEGR2* 40to 105 C 475-01 SOIC-16, Tape & Reel
*Part number sourced from a different facility.
V
DD
Temp Comp V 16 N/C
1
G-Cell SS
Integrator Gain Filter V
OUT
and Gain
V 2 15 N/C
Sensor
SS
14
V 3 N/C
SS
13 N/C
V 4
OUT
12
ST STATUS 5 N/C
Control Logic &
Clock
Oscillator
Self-test V 11
6 N/C
DD
EPROM Trim Circuits
Generator
V
V 10
SS N/C
SS 7
ST 9
8 N/C
STATUS
Figure 2. Pin Connections
Figure 1. Simplified Accelerometer Functional Block Diagram
Freescale Semiconductor, Inc., 2012. All rights reserved.Table 1. Maximum Ratings
(Maximum ratings are the limits to which the device can be exposed without causing permanent damage.)
Rating Symbol Value Unit
Powered Acceleration (all axes) G 1500 g
pd
Unpowered Acceleration (all axes) G 2000 g
upd
Supply Voltage V 0.3 to +7.0 V
DD
(1)
Drop Test D 1.2 m
drop
Storage Temperature Range T 40 to +125 C
stg
1. Dropped onto concrete surface from any axis.
ELECTRO STATIC DISCHARGE (ESD)
WARNING: This device is sensitive to electrostatic
discharge.
Although the Freescale accelerometers contain internal performance or cause failure of the chip. When handling the
2 kV ESD protection circuitry, extra precaution must be taken accelerometer, proper ESD precautions should be followed
by the user to protect the chip from ESD. A charge of over to avoid exposing the device to discharges which may be
2000 volts can accumulate on the human body or associated detrimental to its performance.
test equipment. A charge of this magnitude can alter the
MMA1254
Sensors
2 Freescale Semiconductor