MMA1220D Freescale Semiconductor, MMA1220D Datasheet - Page 5
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MMA1220D
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
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
Go to: www.freescale.com
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