Sensors

Freescale Semiconductor

3

MMA7330L

Table 2. Operating Characteristics

(1)

Characteristic

Symbol

Min

Typ

Max

Unit

Operating Temperature Range

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

g-Select: 0

g-Select: 1

2.2

—

—

-40

—

—

2.8

400

3

—

±4

±12

3.6

600

10

+85

—

—

V

μA

μA

°C

g

g

Output Signal

(5), (6)

4g

12g

Bandwidth Response

XY

Z

Output Impedance

1.316

—

289.5

75.2

—

—

—

—

1.4

±2.0

308

83.6

±0.03

400

300

32

1.484

—

326.5

91.9

—

—

—

—

V

mg/°C

mV/g

mV/g

%/°C

Hz

Hz

k

Ω

Self Test

Output Response

Input Low

Input High

Δg

STXY

Δg

STZ

+0.05

+0.8

-0.1

+1.0

—

—

—

+1.2

g

g

V

V

Noise

—

350

—

μg/

Control Timing

Sensing Element Resonant Frequency

XY

Z

Internal Sampling Frequency

—

—

—

—

—

—

1.0

0.5

2.0

6.0

3.4

11

2.0

2.0

5.0

—

—

—

ms

ms

ms

kHz

kHz

kHz

Output Stage Performance

—

V

-1.0

—

+1.0

%FSO

-5.0

—

+5.0

%

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

Ω resistor and an external 3.3nF capacitor

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

μF capacitor on V

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

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

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.

Hz