MMA7331LC datasheet(3/11 Pages) FREESCALE

3 / 11 page

Sensors

Freescale Semiconductor

MMA7331LC

Table 2. Operating Characteristics

Unless otherwise noted: -40°C < TA < 85°C, 2.2 V < VDD < 3.6 V, Acceleration = 0g, Loaded output

(1)

Characteristic

Symbol

Min

Typ

Max

Unit

Operating Range(2)

Supply Voltage(3)

Supply Current(4)

Supply Current at Sleep Mode(4)

Operating Temperature Range

Acceleration Range, X-Axis, Y-Axis, Z-Axis

g-Select: 0

g-Select: 1

VDD

IDD

gFS

2.2

—

-40

—

2.8

400

—

±4

±9

3.6

600

+85

—

μA

°C

Output Signal

Zero g (TA = 25°C, VDD = 2.8 V)

(5), (6)

Zero g Temperature Coefficient(7)

Sensitivity (TA = 25°C, VDD = 2.8 V)

Sensitivity(4)

Bandwidth Response

Output Impedance

VOFF

TCO4g

TCO9g

S4g

S9g

S,TA

f-3dBXY

f-3dBZ

1.316

1.45

-2

-12

-7.9

-8.4

289.5

75.2

-0.0075

—

1.4

±0.5

-6.4

-0.9

308

83.6

±0.002

400

300

1.484

-0.6

5.2

8.5

326.5

91.9

+0.0075

—

mg/°C

mV/g

%/°C

Self Test

Output Response

XOUT, YOUT

ZOUT

Input Low

Input High

ΔgSTXY

ΔgSTZ

VIL

VIH

+0.05

+0.5

VSS

0.7 VDD

-0.1

+1.0

—

+1.2

0.3 VDD

VDD

Noise

Power Spectral Density RMS (0.1 Hz – 1 kHz)(4)

nPSD

—

350

—

μg/

Control Timing

Power-Up Response Time(8)

Enable Response Time(9)

Self Test Response Time(10)

Sensing Element Resonant Frequency

Internal Sampling Frequency

tRESPONSE

tENABLE

tST

fGCELLXY

fGCELLZ

fCLK

—

1.0

0.5

2.0

6.0

3.4

2.0

5.0

—

kHz

Output Stage Performance

Full-Scale Output Range (IOUT = 3 µA)

VFSO

VSS+0.1

—

VDD–0.1

Nonlinearity, XOUT, YOUT, ZOUT

NLOUT

-1.0

—

+1.0

%FSO

Cross-Axis Sensitivity(11)

VXY, XZ, YZ

-5.0

—

+5.0

1. For a loaded output, the measurements are observed after an RC filter consisting of an internal 32 k

Ω resistor and an external 3.3 nF capacitor

(recommended as a minimum to filter clock noise) on the analog output for each axis and a 0.1

μF capacitor on VDD - GND. The output sensor

bandwidth is determined by the Capacitor added on the output. f = 1/2

π * (32 x 103) * C. C = 3.3 nF corresponds to BW = 1507 Hz, which is the minimum

to filter out internal clock noise.

2. These limits define the range of operation for which the part will meet specification.

3. Within the supply range of 2.2 and 3.6 V, the device operates as a fully calibrated linear accelerometer. Beyond these supply limits the device may

operate as a linear device but is not guaranteed to be in calibration.

4. This value is measured with g-Select in 4g mode.

5. The device can measure both + and – acceleration. With no input acceleration the output is at midsupply. For positive acceleration the output will

increase above VDD/2. For negative acceleration, the output will decrease below VDD/2.

6. For optimal 0g offset performance, adhere to AN3484 and AN3447.

7. X, Y, Z = 0g

8. The response time between 10% of full scale VDD input voltage and 90% of the final operating output voltage.

9. The response time between 10% of full scale Sleep Mode input voltage and 90% of the final operating output voltage.

10. The response time between 10% of the full scale self test input voltage and 90% of the self test output voltage.

11. A measure of the device’s ability to reject an acceleration applied 90° from the true axis of sensitivity.

MMA7331LC 数据表(PDF) 3 Page - Freescale Semiconductor, Inc

MMA7331LC 数据表(HTML) 3 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11

数据表下载