MPXV5010GC6U datasheet(64/670 Pages) MOTOROLA

部品番号	MPXV5010GC6U

部品情報	Sensor

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メーカー	MOTOROLA [Motorola, Inc]

ホームページ	http://www.freescale.com

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64 / 670 page

MMA1250D

2–28

Motorola Sensor Device Data

www.motorola.com/semiconductors

BASIC CONNECTIONS

10

11

12

13

14

15

16

8

7

6

5

4

3

2

1

9

VSS

VOUT

STATUS

VDD

VSS

ST

N/C

Figure 4. Pinout Description

Pin No.

Pin Name

Description

1 thru 3

VSS

Redundant connections to the internal

VSS and may be left unconnected.

4

VOUT

Output voltage of the accelerometer.

5

STATUS

Logic output pin used to indicate fault.

6

VDD

The power supply input.

7

VSS

The power supply ground.

8

ST

Logic input pin used to initiate self–

test.

9 thru 13

Trim pins

Used for factory trim.

Leave unconnected.

14 thru 16

—

No internal connection.

Leave unconnected.

MMA1250D

ST

VDD

VSS

VOUT

OUTPUT

SIGNAL

R1

1 k

Ω

4

C2

0.1

µF

8

6

7

LOGIC

INPUT

VDD

C1

0.1

µF

Figure 5. SOIC Accelerometer with Recommended

Connection Diagram

STATUS

5

3

2

1

VSS

PCB Layout

P0

A/D IN

VRH

VSS

VDD

ST

VOUT

VSS

VDD

0.1

µF

C

1 k

Ω

0.1

µF

C 0.1

µF

POWER SUPPLY

C

R

C

0.1

µF

Figure 6. Recommended PCB Layout for Interfacing

Accelerometer to Microcontroller

P1

STATUS

NOTES:

• Use a 0.1 µF capacitor on VDD to decouple the power

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

VSS terminals shown in Figure 4.

• Use an RC filter of 1 kΩ and 0.1 µF 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.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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