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MMA3201DR2 데이터시트(PDF) 5 Page - Freescale Semiconductor, Inc

부품명 MMA3201DR2
상세설명  Surface Mount Micromachined Accelerometer
PDF  10 Pages
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제조업체  FREESCALE [Freescale Semiconductor, Inc]
홈페이지  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MMA3201DR2 데이터시트(HTML) 5 Page - Freescale Semiconductor, Inc

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Sensors
Freescale Semiconductor
5
MMA3201D
BASIC CONNECTIONS
Pinout Description
Figure 5. SOIC Accelerometer with Recommended
Connection Diagram
PCB Layout
Figure 6. Recommended PCB Layout for Interfacing
Accelerometer to Microcontroller
NOTES:
1. Use a 0.1
µF capacitor on VDD to decouple the power
source.
2. Physical coupling distance of the accelerometer to the
microcontroller should be minimal.
3. 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 6.
4. Use an RC filter of 1 k
Ω and 0.01 µF on the output of
the accelerometer to minimize clock noise (from the
switched capacitor filter circuit).
5. PCB layout of power and ground should not couple
power supply noise.
6. Accelerometer and microcontroller should not be a
high current path.
7. 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.
Pin Name
Description
1 thru 3
—
Leave unconnected.
4
—
No internal connection. Leave
unconnected.
5
ST
Logic input pin used to initiate self-test.
6XOUT
Output voltage of the accelerometer. X
Direction.
7
STATUS
Logic output pin to indicate fault.
8VSS
The power supply ground.
9VDD
The power supply input.
10
AVDD
Power supply input (Analog).
11
YOUT
Output voltage of the accelerometer. Y
Direction.
12 thru 16
—
Used for factory trim. Leave
unconnected.
17 thru 19
—
No internal connection. Leave
unconnected.
20
GND
Ground.
N/C
N/C
N/C
N/C
ST
XOUT
STATUS
VSS
VDD
AVDD
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
GND
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
YOUT
VDD
Logic
Input
C1
0.1
µF
5
9
10
8
ST
VDD
AVDD
VSS
YOUT
MMA3201D
7
6
11
STATUS
X Output
Signal
R1
1 k
Ω
C2
0.01
µF
R2
1 k
Ω
C3
0.01
µF
Y Output
Signal
XOUT
STATUS
ST
XOUT
YOUT
VSS
VDD
P1
P0
A/D In
A/D In
VRH
VSS
VDD
C 0.1 µF
C0.1
µF
Power Supply
C 0.1
µF
0.1
µF
0.1
µF
R
1 k
Ω
R
C
C
1 k
Ω



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