MMA1220D Freescale Semiconductor, MMA1220D Datasheet - Page 5

• Manufacturer Part Number: MMA1220D
• Description: SENS ACCEL Z-AXIS +-8G 16-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MMA1220D

• Axis: Z
• Acceleration Range: ±8g
• Sensitivity: 250mV/g
• Voltage - Supply: 4.75 V ~ 5.25 V
• Output Type: Analog
• Bandwidth: 250Hz
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.50mm Width)
• Family Name: MMA1220
• 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
• Sensing Axis: Z
• Acceleration: 8 g
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Interface: -
• Lead Free Status / Rohs Status: Not Compliant
• Other names: MMA1220DTR; MMA1220DTR

14 thru 16
9 thru 13
Motorola Sensor Device Data
Pin No.
V DD
1 thru 3
Figure 4. SOIC Accelerometer with Recommended
0.1 F
4
5
6
7
8
C1
LOGIC
INPUT
STATUS
V OUT
Pin Name
V DD
Trim pins
V SS
STATUS
N/C
N/C
N/C
ST
V OUT
V DD
V SS
V SS
ST
—
BASIC CONNECTIONS
4
8
7
Connection Diagram
Pinout Description
ST
V DD
V SS
1
2
3
4
5
6
7
8
MMA1220D
Redundant connections to the internal
Logic input pin used to initiate self–
Output voltage of the accelerometer.
Logic output pin used to indicate fault.
The power supply ground.
The power supply input.
Used for factory trim.
No internal connection.
V SS and may be left unconnected.
test.
Leave unconnected.
Leave unconnected.
V OUT
Freescale Semiconductor, Inc.
For More Information On This Product,
Description
16
15
14
13
12
10
11
9
6
5
0.01 F
C2
1 k
R1
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
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STATUS
OUTPUT
SIGNAL
NOTES:
PCB Layout
Figure 5. Recommended PCB Layout for Interfacing
Use a 0.1 F capacitor on V DD 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 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 inter-
fere with the internal accelerometer sampling frequency.
This will prevent aliasing errors.
STATUS
V OUT
V DD
V SS
ST
Accelerometer to Microcontroller
C 0.1 F
POWER SUPPLY
1 k
R
C
C
0.01 F
0.1 F
P1
P0
A/D IN
V RH
MMA1220D
V DD
V SS
C
0.1 F
5