XMMA1000P データシートの表示（PDF） - Motorola => Freescale
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XMMA1000P Datasheet PDF : 8 Pages
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XMMA1000P XMMA2000W
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 axis)
Unpowered Acceleration (all axis)
Supply Voltage
Drop Test(1)
Storage Temperature Range
Gpd
500
g
Gupd
2000
g
VDD
–0.3 to +7.0
V
Ddrop
1.2
m
Tstg
– 40 to +105
°C
OPERATING RANGE (These limits define the range of operation for which the part will meet specification.)
Characteristic
Symbol
Min
Typ
Max
Unit
Supply Voltage(2)
VDD
4.75
5.0
5.25
V
Supply Current
IDD
1.0
4.0
5.0
mA
Operating Temperature Range
TA
– 40
—
+85
°C
NOTES:
1. Dropped onto concrete surface from any axis.
2. Within the supply range of 4.75 and 5.25 volts, the device operates as a fully calibrated linear accelerometer. Beyond these supply limits
the device may operate as a linear device but is not guaranteed to be in calibration.
ELECTRO STATIC DISCHARGE (ESD)
Due to the technological advancing semiconductor indus-
try, it has now become increasingly important for semicon-
ductor manufacturers, users of semiconductors and other
electronic components to fully understand the nature and
sources of ESD. More importantly, a thorough understanding
of its impact on quality and reliability must be understood.
Whereas the Motorola accelerometers contain internal
2kV ESD protection circuitry, extra precaution must be taken
by the user to protect the chip from ESD. A charge of over
2000 volts can accumulate on the human body or associated
Automated Test Equipment (ATE). A charge of this magni-
tude can alter the performance or cause failure of the chip.
When proper ESD precautions are followed the discharges
will not be detrimental to the chips performance.
FREQUENTLY ASKED QUESTIONS
Q. What is the g–cell?
A. The g–cell is the acceleration transducer within the accel-
erometer device. It is hermetically sealed at the wafer level to
ensure a contaminant free environment, resulting in superior
reliability performance.
Q. What does the output typically interface with?
A. The accelerometer device is designed to interface with an
analog to digital converter available on most microcontrol-
lers. The output has a 2.5 V DC offset, therefore positive and
negative acceleration is measurable.
Q. What is the orientation of the g–force in relation to the
output voltage?
A. The accelerometer responds to g forces perpendicular to
the plane of the package. For acceleration directed onto the
top of the package, the output voltage will increase above the
nominal 2.5 V. For acceleration directed away from the top of
the package, the output will decrease below 2.5 V. Refer to
the “Positive Acceleration Sensing Direction’’ diagram on
page 7.
Q. What is the resonant frequency of the g–cell?
A. The accelerometer’s g–cell is overdamped. The first reso-
nant mode of the package is 10 kHz for the DIP and 5 kHz for
the Wingback.
Q. What is ratiometricity?
A. Ratiometricity is the sensors ability to track changes in
supply voltage. This is a key feature when interfacing to a
microcontroller or an A/D converter. Ratiometricity allows for
system level cancellation of supply induced errors in the ana-
log to digital conversion process. Refer to the Special Fea-
tures section under the Principle of Operation for more
information.
Q. Is the accelerometer device sensitive to electrostatic
discharge (ESD)?
A. Yes . . . the SENSEON accelerometer should be handled
like other CMOS technology devices.
Q. Can the g–cell part “latch’’?
A. No, overrange stops have been designed into the g–cell
to prevent latching. (Latching is when the middle plate of the
g–cell sticks to either the upper or lower plate.)
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Motorola Sensor Device Data
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