MMA7455LT datasheet(5/27 Pages) FREESCALE

5 / 27 page

Sensors

Freescale Semiconductor

MMA7455L

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

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

tsu

tru

trd

tst

fGCELLXY

fGCELLZ

6.0

3.4

kHz

Nonlinearity (2 g range)

-1

—

%FS

Cross Axis Sensitivity

-5

Table 3. Function Parameters for Detection

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

Characteristic

Symbol

Min

Typ

Max

Unit

Level Detection

Detection Threshold Range

Pulse Detection

Pulse detection range (Adjustable range)

0.5

127

Time step for pulse detection

0.5

Threshold range for pulses

Detection levels for threshold (5)

127

Levels

Latency timer (Adjustable range)

150

Time Window (Adjustable range)

250

Measurement bandwidth for detecting interrupt

600

Time step for latency timer and time window

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

Unit

MMA7455LT Datasheet(PDF) 5 Page - Freescale Semiconductor, Inc

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