MPXM2202AS datasheet(52/670 Pages) MOTOROLA

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MMA1201P MMA2200W

2–16

Motorola Sensor Device Data

www.motorola.com/semiconductors

MMA2200W

VDD

VSS

VOUT

OUTPUT

SIGNAL

1 k

Ω

0.01

µF

LOGIC

INPUT

VDD

0.1

µF

Figure 4. Wingback Accelerometer with

Recommended Connection Diagram

STATUS

Pinout Description for the DIP Package

N/C

VOUT

STATUS

VSS

VDD

N/C

Pin No.

Pin Name

Description

—

Leave unconnected or connect to

signal ground.

2 thru 3

—

No internal connection. Leave un-

connected.

Logic input pin to initiate self test.

VOUT

Output voltage

Status

Logic output pin to indicate fault.

VSS

Signal ground

VDD

Supply voltage (5 V)

9 thru 13

Trim Pins

Used for factory trim. Leave un-

connected.

14 thru 16

—

No internal connection. Leave un-

connected.

MMA1201P

VDD

VSS

VOUT

OUTPUT

SIGNAL

1 k

Ω

0.01

µF

LOGIC

INPUT

VDD

0.1

µF

Figure 5. DIP Accelerometer with Recommended

Connection Diagram

STATUS

PCB Layout

A/D IN

VRH

VSS

VDD

VOUT

VSS

VDD

0.01

µF

1 k

Ω

0.1

µF

C 0.1

µF

POWER SUPPLY

0.1

µF

Figure 6. Recommend PCB Layout for Interfacing

Accelerometer to Microcontroller

STATUS

NOTES:

• Use a 0.1 µF capacitor on VDD 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 4.

• Use an RC filter of 1 kΩ and 0.01 µF 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.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

MPXM2202AS Datasheet(PDF) 52 Page - Motorola, Inc

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