參數(shù)資料
型號(hào)： MMA2301DR2
廠商： Motorola, Inc.
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(yè)數(shù)： 5/7頁(yè)
文件大小： 140K
代理商： MMA2301DR2
Motorola Sensor Device Data
MMA2301D
5
BASIC CONNECTIONS
Pinout Description
Figure 3. SOIC Accelerometer with Recommended
Connection Diagram
Figure 4. 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 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 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
R
C
0.1
μ
F
P1
STATUS
M
A
C
C
C
0.1
μ
F
PCB Layout
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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