參數(shù)資料
型號： MMA3201DR2
廠商： MOTOROLA INC
元件分類： 模擬信號調(diào)理
英文描述： Surface Mount Micromachined Accelerometer
中文描述： SPECIALTY ANALOG CIRCUIT, PDSO20
封裝： SOIC-20
文件頁數(shù)： 5/8頁
文件大?。?/td> 172K
代理商： MMA3201DR2
Motorola Sensor Device Data
MMA3201D
5
BASIC CONNECTIONS
Pinout Description
Figure 3. SOIC Accelerometer with Recommended
Connection Diagram
PCB Layout
Figure 4. Recommended PCB Layout for Interfacing
Accelerometer to Microcontroller
NOTES:
Use a 0.1
μ
F capacitor on V
DD
to decouple the power
source.
Physical coupling distance of the accelerometer to the
microcontroller should be minimal.
Place a ground plane beneath the accelerometer to reduce
noise, the ground plane should be attached to all of the open
ended terminals shown in Figure 4.
Use an RC filter of 1 k
and 0.01
μ
F on the output of the
accelerometer to minimize clock noise (from the switched
capacitor filter circuit).
PCB layout of power and ground should not couple power
supply noise.
Accelerometer and microcontroller should not be a high
current path.
A/D sampling rate and any external power supply switching
frequency should be selected such that they do not interfere
with the internal accelerometer sampling frequency. This
will prevent aliasing errors.
Pin No.
1 thru 3
4
Pin Name
—
—
Description
Leave unconnected.
No internal connection. Leave
unconnected.
Logic input pin used to initiate
self-test.
Output voltage of the
accelerometer. X Direction.
Logic output pin to indicate
fault.
The power supply ground.
The power supply input.
Power supply input (Analog).
Output voltage of the
accelerometer. Y Direction.
Used for factory trim. Leave
unconnected.
No internal connection. Leave
unconnected.
Ground.
5
ST
6
X
OUT
7
STATUS
8
9
10
11
V
SS
V
DD
AV
DD
Y
OUT
12 thru 16
—
17 thru 19
—
20
GND
14
15
16
17
18
19
20
8
7
6
5
4
3
2
1
13
N/C
ST
X
OUT
STATUS
V
DD
AV
DD
GND
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
12
11
10
9
V
SS
Y
OUT
N/C
N/C
N/C
10
X
OUT
Y
OUT
MMA3201D
ST
V
DD
V
SS
R1
1 k
C2
0.01
μ
F
5
9
8
Logic
Input
V
DD
C1
0.1
μ
F
7
6
C3
0.01
μ
F
R2
1 k
AV
DD
11
Status
X Output
Signal
Y Output
Signal
P0
A/D In
A/D In
V
RH
V
SS
V
DD
ST
Y
OUT
V
SS
V
DD
0.01
μ
F
C
1 k
0.1
μ
F
0.1
μ
F
Power Supply
C
R
C
0.1
μ
F
P1
STATUS
X
OUT
R
0.01
μ
F
C
1 k
M
A
C
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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