MMA7368LR2 Freescale Semiconductor, MMA7368LR2 Datasheet - Page 5

• Manufacturer Part Number: MMA7368LR2
• Description: ACCELEROMETER 1.5G 3AXIS 14-LGA
• Manufacturer: Freescale Semiconductor

Specifications of MMA7368LR2

• Axis: X, Y, Z
• Acceleration Range: ±1.5g
• Sensitivity: 800mV/g
• Voltage - Supply: 2.2 V ~ 3.6 V
• Output Type: Analog
• Bandwidth: 400Hz - XY, 300Hz - Z
• Interface: Parallel
• Mounting Type: Surface Mount
• Package / Case: 14-LGA
• Sensing Axis: X, Y, Z
• Acceleration: 1.5 g
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 3. Pin Descriptions
Pin No.
Sensors
Freescale Semiconductor
Pin Descriptions
10
11
12
13
14
1
2
3
4
5
6
7
8
9
V DD
Figure 5. Accelerometer with Recommended
0.1 μF
Pin Name
Self Test
Logic
Input
Logic
Input
Sleep
X
Y
Z
V
N/C
V
N/C
N/C
N/C
NC
NC
NC
OUT
OUT
OUT
DD
SS
Figure 4. Pinout Description
X
Y
Z
Connection Diagram
V
13
N/C
V
OUT
OUT
OUT
DD
No internal connection
Leave unconnected
X direction output voltage
Y direction output voltage
Z direction output voltage
Power Supply Ground
Power Supply Input
Logic input pin to enable product or Sleep Mode
No internal connection
Leave unconnected
Leave unconnected
Leave unconnected
Unused for factory trim
Leave unconnected
Unused for factory trim
Leave unconnected
Input pin to initiate Self Test
Unused for factory trim
Leave unconnected
6
5
7
SS
Self Test
V DD
V SS
Sleep
Top View
MMA7368L
Sleep
N/C
X OUT
Y OUT
Z OUT
Description
Self Test
N/C
N/C
N/C
N/C
N/C
2
3
4
0.1 μF
0.1 μF
0.1 μF
BASIC CONNECTIONS
PCB Layout
NOTES:
Figure 6. Recommended PCB Layout for Interfacing
1. Use 0.1 µF capacitor on V
2. Physical coupling distance of the accelerometer to
3. Place a ground plane beneath the accelerometer to
4. Use a 0.1uF capacitor on the outputs of the
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
source.
the microcontroller should be minimal.
reduce noise, the ground plane should be attached to
all of the open ended terminals shown in
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 (11 kHz for the sampling
frequency). This will prevent aliasing errors.
Self Test
Sleep
X
Y
Z
V
V
OUT
OUT
OUT
DD
SS
Accelerometer to Microcontroller
POWER SUPPLY
C
C
C
C
DD
C
C
to decouple the power
A/D
A/D
A/D
V
P0
P1
RH
IN
IN
IN
MMA7368L
Figure
V
V
DD
SS
6.
C
C
5