參數(shù)資料
型號: MMA2301EGR2
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: Surface Mount Micromachined Accelerometer
中文描述: 表面貼裝微加速度計(jì)
文件頁數(shù): 5/10頁
文件大小: 275K
代理商: MMA2301EGR2
Sensors
Freescale Semiconductor
5
MMA2301D
BASIC CONNECTIONS
PINOUT DESCRIPTION
Figure 4. SOIC Accelerometer with Recommended
Connection Diagram
Figure 5. Recommend 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 5
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.
Table 3. Pin Descriptions
Pin No.
Pin Name
Description
1 thru 3
N/C
Leave unconnected.
4
ST
Logic input pin used to initiate self-
test.
5
V
OUT
Output voltage of the accelerometer.
6
STATUS
Logic output pin to indicate fault.
7
V
SS
The power supply ground.
8
V
DD
The power supply input.
9 thru 13
Trim pins
Used for factory trim. Leave
unconnected.
14 thru 16
No internal connection. Leave
unconnected.
10
11
12
13
14
15
16
9
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
8
7
6
5
4
3
2
1
N/C
N/C
N/C
ST
V
OUT
STATUS
V
DD
V
SS
MMA2301D
ST
V
DD
V
SS
V
OUT
Output
Signal
R1
1 k
5
C2
0.01
μ
F
4
8
7
Logic
Input
V
DD
C1
0.1
μ
F
6
Status
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
Power Supply
C
0.1
μ
F
P1
STATUS
M
A
C
C
C
0.1
μ
F
PCB Layout
R
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