KIT3376MMA7361LC【PDF 3/11 页】KIT EVAL 3AXIS ANLG ACCELEROMETR

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Table 2. Operating Characteristics

Unless otherwise noted: -40°C < T A < 85°C, 2.2 V < V DD < 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

V DD

I DD

I DD

T A

2.2

—

—

-40

3.3

400

3

—

3.6

600

10

+85

V

μ A

μ A

°C

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

g-Select: 0

g-Select: 1

g FS

g FS

—

—

±1.5

±6.0

—

—

g

g

Output Signal

Zero-g (T A = 25°C, V DD = 3.3 V) (5), (6)

V OFF

XY

Z (7)

1.485

1.32

1.65

1.65

1.815

1.815

V

v

Zero-g (4)

V OFF , T A

-2.0

±0.5

+2.0

mg/°C

Sensitivity (T A = 25°C, V DD = 3.3 V)

1.5g

6g

Sensitivity (4)

S 1.5g

S 6g

S,T A

740

190.6

-0.0075

800

206

±0.002

860

221.5

+0.0075

mV/g

mV/g

%/°C

Bandwidth Response

XY

Z

Output Impedance

0g-Detect

f -3dBXY

f -3dBZ

Z O

0g detect

—

—

—

-0.4

400

300

32

0

—

—

—

+0.4

Hz

Hz

k Ω

g

Self Test

Output Response

X OUT , Y OUT

Z OUT

Input Low

Input High

Δ g STXY

Δ g STZ

V IL

V IH

+0.05

+0.8

V SS

0.7 V DD

-0.1

+1.0

—

—

—

+1.2

0.3 V DD

V DD

g

g

V

V

Noise

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

n PSD

—

350

—

μ g/ Hz

Control Timing

Power-Up Response Time (8)

Enable Response Time (9)

Self Test Response Time (10)

t RESPONSE

t ENABLE

t ST

—

—

—

1.0

0.5

2.0

2.0

2.0

5.0

ms

ms

ms

Sensing Element Resonant Frequency

XY

Z

Internal Sampling Frequency

f GCELLXY

f GCELLZ

f CLK

—

—

—

6.0

3.4

11

—

—

—

kHz

kHz

kHz

Output Stage Performance

Full-Scale Output Range (I OUT = 3 μA)

Nonlinearity, X OUT , Y OUT , Z OUT

Cross-Axis Sensitivity (11)

V FSO

NL OUT

V XY, XZ, YZ

V SS +0.1

-1.0

-5.0

—

—

—

V DD –0.1

+1.0

+5.0

V

%FSO

%

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 μ F capacitor on V DD - GND. The output sensor

bandwidth is determined by the Capacitor added on the output. f = 1/2 π * (32 x 10 3 ) * 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 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 V DD /2. For negative acceleration, the output will decrease below V DD /2.

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

7.Product performance will not exceed this minimum level, however measurement over time will not be equal to time zero measurements for this

specific parameter.

8. The response time between 10% of full scale V DD 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.

MMA7361LC

Sensors

Freescale Semiconductor

3

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