MMA1270D Freescale Semiconductor, MMA1270D Datasheet - Page 5

• Manufacturer Part Number: MMA1270D
• Description: SENSOR ACCEL Z-AX +/-2.5G 16SOIC
• Manufacturer: Freescale Semiconductor
• Series: MMAr

Specifications of MMA1270D

• Axis: Z
• Acceleration Range: ±2.5g
• Sensitivity: 750 mV/g
• Voltage - Supply: 4.75 V ~ 5.25 V
• Output Type: Analog
• Bandwidth: 50Hz
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.50mm Width)
• Family Name: MMA1270
• 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): 105C
• Operating Temperature Classification: Industrial
• Product Height (mm): 3.3mm
• Mounting: Surface Mount
• Pin Count: 16
• Sensing Axis: Z
• Acceleration: 2.5 g
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• For Use With: RD1986MMA2260D - KIT SENSOR ACCEL MMA2260D TRIAX
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Interface: -
• Lead Free Status / Rohs Status: Not Compliant

14 thru 16
9 thru 13
Motorola Sensor Device Data
Pin No.
1 thru 3
Figure 5. SOIC Accelerometer with Recommended
4
5
6
7
8
Pin Name
Trim pins
STATUS
V
Figure 4. Pinout Description
V
V
V
ST
OUT
—
DD
SS
SS
BASIC CONNECTIONS
Connection Diagram
Redundant connections to the internal
Output voltage of the accelerometer.
Logic output pin used to indicate fault.
The power supply input.
The power supply ground.
Logic input pin used to initiate self–
Used for factory trim.
No internal connection.
V
test.
Leave unconnected.
Leave unconnected.
SS
and may be left unconnected.
Freescale Semiconductor, Inc.
For More Information On This Product,
Description
Go to: www.freescale.com
NOTES:
PCB Layout
Figure 6. Recommended PCB Layout for Interfacing
Use a 0.1 F capacitor on V
source.
Physical coupling distance of the accelerometer to the mi-
crocontroller should be minimal.
Place a ground plane beneath the accelerometer to reduce
noise, the ground plane should be attached to all internal
V
Use an RC filter of 1 k and 0.1 F on the output of the ac-
celerometer 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.
SS
terminals shown in Figure 4.
Accelerometer to Microcontroller
DD
to decouple the power
5