MMA7455L(2007) Просмотр технического описания (PDF) - Freescale Semiconductor

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MMA7455L
(Rev.:2007)

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

Freescale Semiconductor 

Table 2. Operating Characteristics (Continued)

Unless otherwise noted: –40°C < TA < 85°C, 2.4 V < AVDD < 3.6 V, Acceleration = 0g, Loaded output

Characteristic

Symbol

Min

Typ

Max

Control Timing

Wait Time for IIC/SPI ready after power on

Turn On Response Time (Standby to Normal Mode)

Turn Off Response Time (Normal to Standby Mode)

Self Test Response Time

Sensing Element Resonant Frequency

XY

Z

Nonlinearity (2 g range)

tsu

1

tru

20

trd

20

tst

fGCELLXY

6.0

fGCELLZ

3.4

-1

—

+1

Cross Axis Sensitivity

-5

+5

Unit

ms

ms

ms

ms

kHz

kHz

%FS

%

Table 3. Function Parameters for Detection

VL < VDD < VH; TL < TA < TH unless otherwise specified

Characteristic

Symbol

Min

Typ

Max

Level Detection

Detection Threshold Range

0

FS

Pulse Detection

Pulse detection range (Adjustable range)

0.5

127

Time step for pulse detection

0.5

Threshold range for pulses

0

FS

Detection levels for threshold (5)

127

Latency timer (Adjustable range)

1

150

Time Window (Adjustable range)

1

250

Measurement bandwidth for detecting interrupt

600

Time step for latency timer and time window

1

Note: The response time is between 10% of full scale Vdd input voltage and 90% of the final operating output voltage.

Unit

g

ms

ms

g

Levels

ms

ms

Hz

ms

Sensors

Freescale Semiconductor

MMA7455L

5

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