MMA7455L(2007) 查看數據表（PDF） - Freescale Semiconductor

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MMA7455L
(Rev.:2007)

±2g/±4g/±8g Three Axis Low-g Digital Output Accelerometer

Freescale Semiconductor 

SENSING DIRECTION AND OUTPUT RESPONSE

The following figure shows sensing direction and the

output response for 2g mode.

Top View

65 4 3 21

Direction of Earth's gravity field.*

7

14

8 9 10 11 12 13

XOUT @ 0g = $00

YOUT @ +1g = $3F

ZOUT @ 0g = $00

Side View

Top

Bottom

XOUT @ 0g = $00

YOUT @ 0g = $00

ZOUT @ +1g = $3F

Bottom

XOUT @ +1g = $3F

YOUT @ 0g = $00

ZOUT @ 0g = $00

13 12 11 10 9 8

14

7

1 234 56

XOUT @ -1g = $C1

YOUT @ 0g = $00

ZOUT @ 0g = $00

Top

XOUT @ 0g = $00

YOUT @ 0g = $00

ZOUT @ -1g = $C1

XOUT @ 0g = $00

YOUT @ -1g = $C1

ZOUT @ 0g = $00

* When positioned as shown, the Earth’s gravity will result in a positive 1g output.

Figure 18. Sensing Direction and Output Response at 2g Mode

Table 7. Acceleration vs. Output

FS Mode

2g Mode

4g Mode

8g Mode

Acceleration

-2g

-1g

0g

+1g

+2g

-4g

-1g

0g

+1g

+4g

-8g

-1g

0g

+1g

+8g

Output

$80

$C1

$00

$3F

$7F

$80

$E1

$00

$1F

$7F

$80

$F1

$00

$0F

$7F

Sensors

Freescale Semiconductor

MMA7455L

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