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Fabricante

MMA7455L

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

Freescale Semiconductor 

Table 3. Operating Characteristics

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

Characteristic

Symbol

Min

Typ

Max

Analog Supply Voltage

Standby/Operation Mode

Enable Bus Mode

Digital I/O Pins Supply Voltage(1)

Standby/Operation Mode

Enable Bus Mode

AVDD

2.4

2.8

3.6

AVDD

0

DVDD_IO

2.4

2.8

3.6

DVDD_IO

0

Supply Current Drain

Operation Mode

IDD

Pulse Detect Function Mode

IDD

Standby Mode (except data loading and I2C/SPI communication period)

IDD

Operating Temperature Range

TA

0g Output Signal (TA=25°C, AVDD = 2.8 V)

±2g range (25°C) 8-bit GLVL[1:0]= 0 1

±4g range (25°C) 8-bit GLVL[1:0]= 1 0

±8g range (25°C) 8-bit GLVL[1:0]= 0 0

±8g range (25°C) 10-bit

—

400

490

—

400

490

—

2.5

10

-40

25

85

-18

0

18

-10

0

10

-5

0

5

-18

0

18

Sensitivity (TA=25°C, AVDD = 2.8 V)

±2g range (25°C) 8-bit

±4g range (25°C) 8-bit

±8g range (25°C) 8-bit

±8g range (25°C) 10-bit

58

64

70

29

32

35

14.5

16

17.5

58

64

70

Self-Test Output Response

Zout

Temperature Compensation for Offset

Temperature Sensitivity for Offset

Input High Voltage

Input Low Voltage

Internal Clock Frequency (TA = 25°C, AVDD = 2.8 V)

ΔSTZ

TCO

TCS

VIH

VIL

tCLK

32

±3.5

±0.026

0.7 x DVDD

—

140

64

±0.5

±0.01

—

—

150

83

+3.5

+0.026

—

0.35 x DVDD

160

SPI Frequency

DVDD_IO < 2.4 V

DVDD_IO > 2.4 V

Bandwidth for Data Measurement (User Selectable)

DFBW 0

DFBW 1

—

4

—

—

8

—

—

62.5

—

—

125

—

Output Data Rate

Output Data Rate is 125 Hz when 62.5 bandwidth is selected.

Output Data rate is 250 Hz when 125 Hz bandwidth is selected.

—

125

—

—

250

—

Control Timing

Wait Time for I2C/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

—

—

20

fGCELLXY

—

6.0

—

fGCELLZ

—

3.4

—

-1

—

+1

Cross Axis Sensitivity

-5

—

+5

1. It is recommended to tie the analog and digital supply voltages together.

Unit

V

V

V

V

μA

μA

μA

°C

count

count

count

count

count/g

count/g

count/g

count/g

count

mg/°C

mg/°C

V

V

kHz

MHz

MHz

Hz

Hz

Hz

Hz

ms

ms

ms

ms

kHz

kHz

%FS

%

Sensors

Freescale Semiconductor

MMA7455L

7

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