MMA1250KEG データシートの表示（PDF） - NXP Semiconductors.

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MMA1250KEG

Low G Micromachined Accelerometer

NXP Semiconductors. 

Table 2. Operating Characteristics

(Unless otherwise noted: –40°C ≤ TA ≤ +105°C, 4.75 ≤ VDD ≤ 5.25, Acceleration = 0g, Loaded output.(1))

Characteristic

Symbol

Min

Typ

Max

Unit

Operating Range(2)

Supply Voltage(3)

Supply Current

Operating Temperature Range

Acceleration Range

VDD

4.75

5.00

5.25

V

IDD

1.1

2.1

3.0

mA

TA

–40

—

+105

°C

gFS

—

5

—

g

Output Signal

Zero g (TA = 25°C, VDD = 5.0 V)(4)

Zero g (VDD = 5.0 V)

Sensitivity (TA = 25°C, VDD = 5.0 V)(5)

Sensitivity (VDD = 5.0 V)

Bandwidth Response

Nonlinearity

VOFF

VOFF

S

S

f-3dB

NLOUT

2.25

2.0

380

370

42.5

–1.0

2.5

2.75

V

2.5

3.0

V

400

420

mV/g

400

430.1

mV/g

50

57.5

Hz

—

+1.0

% FSO

Noise

RMS (0.1 Hz – 1.0 kHz)

Spectral Density (RMS, 0.1 Hz – 1.0 KHz)(6)

nRMS

—

nSD

—

2.0

4.0

mVrms

700

—

μg/ Hz

Self-Test

Output Response (VDD = 5.0 V)

Input Low

Input High

Input Loading(7)

Response Time(8)

Status(9), (10)

Output Low (Iload = 100 μA)

Output High (Iload = 100 μA)

ΔVST

1.0

1.25

1.5

V

VIL

VSS

—

0.3 VDD

V

VIH

0.7 VDD

—

VDD

V

IIN

–300

–125

–50

μA

tST

—

2.0

25

ms

VOL

—

—

0.4

V

VOH

VDD – 0.8

—

—

V

Output Stage Performance

Electrical Saturation Recovery Time(11)

Full Scale Output Range (IOUT = 200 μA)

Capacitive Load Drive(12)

Output Impedance

tDELAY

—

—

2.0

ms

VFSO

VSS + 0.25

—

VDD – 0.25

V

CL

—

—

100

pF

ZO

—

50

—

Ω

Mechanical Characteristics

Transverse Sensitivity(13)

VXZ,YZ

—

—

5.0

% FSO

1. For a loaded output the measurements are observed after an RC filter consisting of a 1 kΩ resistor and a 0.1 μF capacitor to ground.

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

3. Within the supply range of 4.75 and 5.25 volts, 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. 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 and for negative acceleration the output will decrease below VDD/2.

5. The device is calibrated at 3g. Sensitivity limits apply to 0Hz acceleration.

6. At clock frequency ≅70 kHz.

7. The digital input pin has an internal pull-down current source to prevent inadvertent self test initiation due to external board level leakages.

8. Time for the output to reach 90% of its final value after a self-test is initiated.

9. The Status pin output is not valid following power-up until at least one rising edge has been applied to the self-test pin. The Status pin is high

whenever the self-test input is high, as a means to check the connectivity of the self-test and Status pins in the application.

10. The Status pin output latches high if a Low Voltage Detection or Clock Frequency failure occurs, or the EPROM parity changes to odd. The

Status pin can be reset low if the self-test pin is pulsed with a high input for at least 100 μs, unless a fault condition continues to exist.

11. Time for amplifiers to recover after an acceleration signal causes them to saturate.

12. Preserves phase margin (60°) to guarantee output amplifier stability.

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

Sensors

Freescale Semiconductor

MMA1250KEG

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