MMA1210EGR2 Freescale, MMA1210EGR2 Datasheet - Page 5

• Manufacturer Part Number: MMA1210EGR2
• Manufacturer: Freescale

Specifications of MMA1210EGR2

• Family Name: MMA1210
• Package Type: SOIC
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.25V
• Operating Temperature (min): -40C
• Operating Temperature (max): 125C
• Operating Temperature Classification: Automotive
• Product Height (mm): 3.3mm
• Mounting: Surface Mount
• Pin Count: 16
• Lead Free Status / RoHS Status: Compliant

Sensors
Freescale Semiconductor
Pinout Description
Table 3. Pin Descriptions
V
Figure 5. SOIC Accelerometer with Recommended
14 thru 16
DD
Pin No.
9 thru 13
0.1 µF
1 thru 3
C1
4
5
6
7
8
Logic
Input
STATUS
V
V
N/C
N/C
N/C
V
OUT
ST
DD
SS
7
4
8 V
Pin Name
Trim pins
STATUS
Connection Diagram
V
ST
V
SS
V
V
DD
ST
—
OUT
—
DD
SS
1
2
3
4
5
6
7
8
MMA1210D
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
9
6
5
0.01 µF
1 kΩ
Description
R1
C2
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
SS
DD
Accelerometer to Microcontroller
C
Power Supply
0.1 µF
1 kΩ
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
MMA1210D
C
0.1 µF
6.
5