參數(shù)資料
型號: MMA2202D
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: Surface Mount Micromachined Accelerometer(表面安裝微電機加速計)
中文描述: 表面貼裝微加速度計(表面安裝微電機加速計)
文件頁數(shù): 5/8頁
文件大?。?/td> 152K
代理商: MMA2202D
Motorola Sensor Device Data
MMA2202D
5
BASIC CONNECTIONS
Pinout Description
Figure 3. SOIC Accelerometer with Recommended
Connection Diagram
Figure 4. Recommended PCB Layout for Interfacing
Accelerometer to Microcontroller
NOTES:
Use a 0.1
μ
F capacitor on VDD 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
Pin Name
Description
No internal connection.
Leave unconnected.
Logic input pin used to
initiate self-test.
Output voltage of the
accelerometer.
Logic output pin to
indicate fault.
The power supply
ground.
The power supply input.
Used for factory trim.
Leave unconnected.
No internal connection.
Leave unconnected.
4
ST
5
V
OUT
6
STATUS
7
V
SS
8
V
DD
9 thru 13
Trim pins
14 thru 16
N/C
N/C
N/C
ST
V
OUT
STATUS
V
SS
V
DD
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
MMA2202D
ST
V
OUT
Output
Signal
R1
1 k
5
C2
0.01
μ
F
4
7
Logic
Input
V
DD
C1
0.1
μ
F
6
Status
8 V
DD
V
SS
P0
A/D In
V
RH
V
SS
V
DD
ST
V
OUT
V
SS
V
DD
0.01
μ
F
1 k
0
.1
μ
F
0.1
μ
F
Power Supply
0.1
μ
F
P1
Status
M
C
R
C
C
C
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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