參數(shù)資料
型號(hào)： MMA1250D
廠商： 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述： Low G Micromachined Accelerometer(小重力微電機(jī)加速計(jì))
中文描述： 低摹微加速度計(jì)（小重力微電機(jī)加速計(jì)）
文件頁數(shù)： 3/8頁
文件大?。?/td> 249K
代理商： MMA1250D
3
Motorola Sensor Device Data
OPERATING CHARACTERISTICS
(Unless otherwise noted: –40
°
C
T
A
+105
°
C, 4.75
V
DD
5.25, Acceleration = 0g, Loaded output
(1)
)
Characteristic
Symbol
Min
Typ
Max
Unit
Operating Range
(2)
Supply Voltage
(3)
Supply Current
Operating Temperature Range
Acceleration Range
V
DD
I
DD
T
A
g
FS
4.75
1.1
40
—
5.00
2.1
—
5
5.25
3.0
+105
—
V
mA
°
C
g
Output Signal
Zero g (T
A
= 25
°
C, V
DD
= 5.0 V)
(4)
Zero g (V
DD
= 5.0 V)
Sensitivity (T
A
= 25
°
C, V
DD
= 5.0 V)
(5)
Sensitivity (V
DD
= 5.0 V)
Bandwidth Response
Nonlinearity
V
OFF
V
OFF
S
S
f
–3dB
NL
OUT
2.25
2.0
380
370
42.5
1.0
2.5
2.5
400
400
50
—
2.75
3.0
420
430.1
57.5
+1.0
V
V
mV/g
mV/g
Hz
% FSO
Noise
RMS (0.1 Hz – 1.0 kHz)
Spectral Density (RMS, 0.1 Hz – 1.0 kHz)
(6)
n
RMS
n
SD
—
—
2.0
700
4.0
—
mVrms
μ
g/
√
Hz
Self–Test
Output Response (V
DD
= 5.0 V)
Input Low
Input High
Input Loading
(7)
Response Time
(8)
V
ST
V
IL
V
IH
I
IN
t
ST
1.0
V
SS
0.7 V
DD
50
—
1.25
—
—
125
10
1.5
0.3 V
DD
V
DD
300
25
V
V
V
μ
A
ms
Status
(12)(13)
Output Low (I
load
= 100
μ
A)
Output High (I
load
= –100
μ
A)
V
OL
V
OH
—
V
DD
0.8
—
—
0.4
—
V
V
Output Stage Performance
Electrical Saturation Recovery Time
(9)
Full Scale Output Range (I
OUT
= –200
μ
A)
Capacitive Load Drive
(10)
Output Impedance
t
DELAY
V
FSO
C
L
Z
O
—
V
SS
+0.25
—
—
—
—
—
50
2.0
V
DD
0.25
100
—
ms
V
pF
Mechanical Characteristics
Transverse Sensitivity
(11)
V
XZ,YZ
—
—
5.0
% FSO
NOTES:
1. For a loaded output the measurements are observed after an RC filter consisting of a 1 k
resistor and a 0.1
μ
F 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. The device can measure both + and
acceleration. With no input acceleration the output is at midsupply. For positive acceleration the output
will increase above V
DD
/2 and for negative acceleration the output will decrease below V
DD
/2.
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.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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