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MXA2500U

Ultra Low Noise, ±1 g Dual Axis Accelerometer with Analog Outputs

Unspecified 

MXA2500U SPECIFICATIONS (Measurements @ 25°C, Acceleration = 0 g unless otherwise noted; VDD, VDA = 5.0V

unless otherwise specified)

MXA2500U

Parameter

Conditions

Min

Typ

Max

Units

SENSOR INPUT

Measurement Range1

Each Axis

±1.0

g

Nonlinearity

Alignment Error2

Transverse Sensitivity3

Best fit straight line

0.5

1.0

% of FS

±1.0

degree

±2.0

%

SENSITIVITY

Each Axis

Sensitivity, Analog Outputs at pins

AOUTX and AOUTY6

Change over Temperature (uncompensated)4

∆ from 25°C, at –40°C

475

500

525

mV/g

+100

%

∆ from 25°C, at +105°C

-50

%

Change over Temperature (compensated) 4

∆ from 25°C, –40°C to +105°C

<3.0

%

ZERO g BIAS LEVEL

0 g Offset6

0 g Voltage6

0 g Offset over Temperature

Each Axis

∆ from 25°C

∆ from 25°C, based on 500mV/g

-0.1

0.00

+0.1

g

1.20

1.25

1.30

V

±0.75

mg/°C

±0.375

mV/°C

NOISE PERFORMANCE

Noise Density, rms

Without frequency compensation

0.2

0.4 mg/ Hz

FREQUENCY RESPONSE

3dB Bandwidth - uncompensated

3dB Bandwidth - compensated5

25

Hz

>160

Hz

TEMPERATURE OUTPUT

Tout Voltage

Sensitivity

1.23

1.25

1.27

V

4.6

5.0

5.4

mV/°C

VOLTAGE REFERENCE

VRef

Change over Temperature

Current Drive Capability

@2.7V-5.25V supply

Source

2.4

2.5

2.65

V

0.1

mV/°C

100

µA

SELF TEST

Continuous Voltage at AOUTX, AOUTY under

Failure

@5.0V Supply, output rails to

supply voltage

5.0

V

Continuous Voltage at AOUTX, AOUTY under

Failure

@2.7V Supply, output rails to

supply voltage

2.7

V

AOUTX and AOUTY OUTPUTS

Normal Output Range

@5.0V Supply

0.1

4.9

V

Current

@2.7V Supply

0.1

2.6

V

Source or sink, @ 2.7V-5.0V supply

100

µA

Turn-On Time

@5.0V Supply

@2.7V Supply

100

mS

40

mS

POWER SUPPLY

Operating Voltage Range

2.7

5.25

V

Supply Current

Supply Current6,7

@ 5.0V

@ 2.7V

3.0

3.6

4.2

mA

4.0

4.9

5.8

mA

TEMPERATURE RANGE

Operating Range

-40

+105

°C

NOTES

1 Guaranteed by measurement of initial offset and sensitivity.

2 Alignment error is specified as the angle between the true and indicated

axis of sensitivity.

3 Transverse sensitivity is the algebraic sum of the alignment and the

inherent sensitivity errors.

4 The sensitivity change over temperature for thermal accelerometers is

based on variations in heat transfer that are governed by the laws of

physics and it is highly consistent from device to device. Please refer to

the section in this data sheet titled “Compensation for the Change of

Sensitivity over Temperature” for more information.

5 External circuitry is required to extend the 3dB bandwidth. (ref.

Application Note: AN-00MX-003).

6 The device operates over a 2.7V to 5.25V supply range. Please note that

sensitivity and zero g bias level will be slightly different at 2.7V operation.

For devices to be operated at 2.7V/3.0V in production, they can be

trimmed at the factory specifically for this lower supply voltage operation,

in which case the sensitivity and zero g bias level specifications on this

page will be met. Please contact the factory for specially trimmed devices

for low supply voltage operation.

7 Note that the accelerometer has a constant heater power control circuit

thereby requiring higher supply current at lower operating voltage.

MEMSIC MXA2500U Rev A

Page 2 of 8

05/02

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