MMA7368LR2 datasheet(3/11 Pages) FREESCALE

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Sensors

Freescale Semiconductor

MMA7368L

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

VDD

IDD

gFS

2.2

—

-40

—

3.3

400

—

±1.5

3.6

600

+85

—

μA

°C

Output Signal

Zero-g (TA = 25°C, VDD = 3.3 V)

(5), (6)

Zero-g(4)

Sensitivity (TA = 25°C, VDD = 3.3 V)

1.5g

Sensitivity(4)

Bandwidth Response

VOFF

VOFF, TA

S1.5g

S,TA

f-3dBXY

f-3dBZ

1.485

-2.0

740

-0.0075

—

1.65

±0.5

800

±0.002

400

300

1.815

+2.0

860

+0.0075

—

mg/°C

mV/g

%/°C

Self Test

Output Response

XOUT, YOUT

ZOUT

Input Low

Input High

ΔgSTXY

ΔgSTZ

VIL

VIH

-0.05

+0.8

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(7)

Enable Response Time(8)

Self Test Response Time(9)

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(10)

VXY, XZ, YZ

-5.0

—

+5.0

1. For a loaded output, the measurements are observed after an RC filter consisting of an internal resistor and an external 0.1uF 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.

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 1.5g 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. The response time between 10% of full scale VDD input voltage and 90% of the final operating output voltage.

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

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

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

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