MMA1212EG Freescale Semiconductor, MMA1212EG Datasheet - Page 5
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MMA1212EG
Manufacturer Part Number
MMA1212EG
Description
IC ACCELEROMETER Z AXIS 16-SOIC
Manufacturer
Freescale Semiconductor
Datasheet
1.MMA1212D.pdf
(10 pages)
Specifications of MMA1212EG
Axis
Z
Acceleration Range
±225g
Sensitivity
10mV/g
Voltage - Supply
4.75 V ~ 5.25 V
Output Type
Analog
Bandwidth
400Hz
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.300", 7.50mm Width)
Sensing Axis
Z
Acceleration
200 g
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Interface
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MMA1212EG
Manufacturer:
FREESCALE
Quantity:
20 000
Sensors
Freescale Semiconductor
Pinout Description
Table 3. Pin Descriptions
14 thru 16
9 thru 13
V
Pin No.
1 thru 3
DD
Figure 5. SOIC Accelerometer with Recommended
0.1 µF
4
5
6
7
8
C1
Logic
Input
STATUS
Pin Name
Trim pins
STATUS
V
V
N/C
N/C
N/C
V
OUT
V
ST
DD
V
V
SS
ST
—
OUT
—
SS
DD
4
8 V
7
Connection Diagram
V
ST
SS
DD
1
2
3
4
5
6
7
8
MMA1212D
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
V
OUT
16
15
14
13
12
11
10
Description
9
6
5
0.01 µF
1 kΩ
C2
R1
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
BASIC CONNECTIONS
STATUS
Output
Signal
PCB Layout
NOTES:
Figure 6. Recommended PCB Layout for Interfacing
1. Use a 0.1 µF capacitor on V
2. Physical coupling distance of the accelerometer to the
3. Place a ground plane beneath the accelerometer to
4. Use an RC filter of 1 kΩ and 0.01 µF on the output of
5. PCB layout of power and ground should not couple
6. Accelerometer and microcontroller should not be a
7. A/D sampling rate and any external power supply
STATUS
source.
microcontroller should be minimal.
reduce noise, the ground plane should be attached to
all of the open ended terminals shown in
the accelerometer to minimize clock noise (from the
switched capacitor filter circuit).
power supply noise.
high current path.
switching frequency should be selected such that they
do not interfere with the internal accelerometer
sampling frequency. This will prevent aliasing errors.
V
OUT
V
V
ST
DD
SS
Accelerometer to Microcontroller
C
Power Supply
0.1 µF
1 kΩ
R R
C
C
0.01 µF
0.1 µF
P1
P0
A/D In
V
RH
DD
to decouple the power
V
V
SS
DD
Figure
MMA1212D
C
0.1 µF
6.
5