Freescale Semiconductor, Inc.
OPERATING CHARACTERISTICS
(1)
5.25, Acceleration = 0g, Loaded output )
(Unless otherwise noted: –40°C
T
A
+105°C, 4.75
V
DD
Characteristic
Symbol
Min
Typ
Max
Unit
(2)
Operating Range
Supply Voltage
Supply Current
(3)
V
4.75
1.1
40
5.00
2.1
—
5.25
3.0
V
mA
°C
g
DD
I
DD
Operating Temperature Range
Acceleration Range
T
+105
—
A
g
—
5
FS
Output Signal
(4)
Zero g (T = 25°C, V
DD
= 5.0 V)
V
V
2.25
2.0
2.5
2.5
400
400
50
2.75
3.0
V
V
A
OFF
Zero g (V
= 5.0 V)
DD
Sensitivity (T = 25°C, V
OFF
S
(5)
= 5.0 V)
380
370
42.5
1.0
420
mV/g
mV/g
Hz
A
DD
= 5.0 V)
Sensitivity (V
S
430.1
57.5
+1.0
DD
Bandwidth Response
Nonlinearity
f
–3dB
NL
—
% FSO
OUT
Noise
RMS (0.1 Hz – 1.0 kHz)
n
—
—
2.0
4.0
—
mVrms
RMS
(6)
Spectral Density (RMS, 0.1 Hz – 1.0 kHz)
n
700
µg/√Hz
SD
Self–Test
Output Response (V
Input Low
= 5.0 V)
V
1.0
1.25
—
1.5
V
V
DD
ST
IL
V
V
0.3 V
DD
SS
0.7 V
Input High
V
IH
—
V
DD
V
DD
50
(7)
Input Loading
I
IN
125
10
300
µA
ms
(8)
Response Time
t
—
25
ST
(12)(13)
Status
Output Low (I
= 100 µA)
V
—
—
—
0.4
—
V
V
load
Output High (I
OL
= –100 µA)
V
OH
V
V
0.8
load
DD
Output Stage Performance
(9)
Electrical Saturation Recovery Time
t
—
—
—
—
50
2.0
ms
V
DELAY
Full Scale Output Range (I
= –200 µA)
V
FSO
+0.25
SS
—
V
0.25
OUT
DD
(10)
Capacitive Load Drive
Output Impedance
C
100
—
pF
Ω
L
Z
—
O
Mechanical Characteristics
(11)
Transverse Sensitivity
NOTES:
V
—
—
5.0
% FSO
XZ,YZ
1. For a loaded output the measurements are observed after an RC filter consisting of a 1 kΩ resistor and a 0.1 µF capacitor to ground.
2. These limits define the range of operation for which the part will meet specification.
3. 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.
4. Thedevicecanmeasureboth+and acceleration.Withnoinputaccelerationtheoutputisatmidsupply.Forpositiveaccelerationtheoutput
will increase above V /2 and for negative acceleration the output will decrease below V /2.
DD
DD
5. Sensitivity limits apply to 0 Hz acceleration.
6. At clock frequency
35 kHz.
7. The digital input pin has an internal pull–down current source to prevent inadvertent self test initiation due to external board level leakages.
8. Time for the output to reach 90% of its final value after a self–test is initiated.
9. Time for amplifiers to recover after an acceleration signal causing them to saturate.
10. Preserves phase margin (60°) to guarantee output amplifier stability.
11. A measure of the device’s ability to reject an acceleration applied 90° from the true axis of sensitivity.
12. The Status pin output is not valid following power–up until at least one rising edge has been applied to the self–test pin. The Status pin is
high whenever the self–test input is high.
13. The Status pin output latches high if the EPROM parity changes to odd. The Status pin can be reset by a rising edge on self–test, unless
a fault condition continues to exist.
2–26
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Motorola Sensor Device Data
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