參數(shù)資料
型號(hào)： MMA1212D
廠商： MOTOROLA INC
元件分類： 模擬信號(hào)調(diào)理
英文描述： Surface Mount Micromachined Accelerometer
中文描述： SPECIALTY ANALOG CIRCUIT, PDSO16
封裝： SOIC-16
文件頁(yè)數(shù)： 5/8頁(yè)
文件大?。?/td> 161K
代理商： MMA1212D
Motorola Sensor Device Data
MMA1212D
5
BASIC CONNECTIONS
Pinout Description
Figure 4. SOIC Accelerometer with Recommended
Connection Diagram
Figure 5. 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 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.
Pin No.
1 thru 3
4
Pin Name
—
ST
Description
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.
5
V
OUT
6
STATUS
7
8
V
SS
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
MMA1211D
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
A
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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