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MXR2999E Datasheet Preview

MXR2999E Datasheet

Dual Axis Accelerometer

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MXR2999E pdf
Low Offset drift, ±0.5g Dual Axis
Accelerometer with Ratiometric Output
MXR2999E
FEATURES
Better than 1 mg resolution
Dual axis accelerometer fabricated on a monolithic CMOS IC
RoHS compliant
On-chip mixed mode signal processing
No moving parts
50,000 g shock survival rating
±0.4mg/°C offset drift over temperature
3V to 5.25V single supply continuous operation
Small (5mm x 5mm x 2mm) surface mount package
Continuous self test
Custom programmable specifications
Independently axis programmable axes (special order)
APPLICATIONS
Automotive – Vehicle Security/Active Suspension/ABS
Headlight Angle Control/Tilt Sensing
Security – Gas Line/Elevator/Fatigue Sensing
Office Equipment – Computer Peripherals/PDA/Cell
Phones/Digital Projectors
Gaming – Joystick/RF Interface/Menu Selection/Tilt Sensing
White Goods – Spin/Vibration Control
GENERAL DESCRIPTION
The MXR2999E is a low noise and low cost, dual axis
accelerometer fabricated on a standard, submicron CMOS
process. It is a complete sensing system with on-chip
mixed mode signal processing. The MXR2999E measures
acceleration with a full-scale range of ±0.5 g and a
sensitivity of 1000mV/g @5Vat 25°C. It can measure
both dynamic acceleration (e.g., vibration) and static
acceleration (e.g., gravity). The MXR2999E design is
based on heat convection and requires no solid proof mass.
This eliminates stiction and particle problems associated
with competitive devices and provides shock survival up to
50,000 g, leading to significantly lower failure rates and
lower loss due to handling during assembly.
Sck
(optional)
Internal
Oscillator
Temperature
Sensor
CLK
Heater
Control
Voltage
Reference
Continous
Self Test
X axis
Low Pass
Filter
Factory Adjust
Offset & Gain
2-AXIS
SENSOR
Y axis
VDD Gnd
Low Pass
Filter
VDA
TOUT
VREF
AOUTX
AOUTY
MXR2999E FUNCTIONAL BLOCK DIAGRAM
The MXR2999E provides two ratiometric analog outputs.
The typical noise floor is 0.2 mg/ Hz allowing signals
below 1mg to be resolved at 1 Hz bandwidth. The 3dB
rolloff of the device occurs at 17 Hz. The offset drift over
temperature is ±0.4mg/°C. The MXR2999E is available in
a small surface mount package (5mm x 5mm x 2mm). It is
hermetically sealed and is operational over a -40°C to
+105°C temperature range. It also contains an on-chip
temperature sensor and a bandgap voltage reference.
Due to the standard CMOS structure of the MXR2999E,
additional circuitry can easily be incorporated into custom
versions for high volume applications. Contact the factory
for more information.
Information furnished by MEMSIC is believed to be accurate and reliable.
However, no responsibility is assumed by MEMSIC for its use, nor for any
infringements of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or
patent rights of MEMSIC.
©MEMSIC, Inc.
One Technology Drive Suite 325,Andover MA01810,USA
Tel: +1 978 738 0900
Fax: +1 978 738 0196
www.memsic.com
MEMSIC MXR2999E Rev.G
Page 1 of 8
2/26/2007



MEMSIC
MEMSIC

MXR2999E Datasheet Preview

MXR2999E Datasheet

Dual Axis Accelerometer

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MXR2999E pdf
MXR2999E SPECIFICATIONS (Measurements @ 25°C, Acceleration = 0 g unless otherwise noted; VDD, VDA = 5.0V
unless otherwise specified)
Parameter
Conditions
SENSOR INPUT
Measurement Range1
Each Axis
Nonlinearity
Alignment Error2
Transverse Sensitivity3
Best fit straight line
SENSITIVITY
Each Axis
Sensitivity, Analog Outputs at pins
AOUTX and AOUTY
Change over Temperature (uncompensated)4
from 25°C, at –40°C
Change over Temperature (compensated) 4
from 25°C, at +105°C
from 25°C, –40°C to +105°C
ZERO g BIAS LEVEL
Each Axis
0 g Offset
0 g Voltage
0 g Offset over Temperature
from 25°C
from 25°C, based on 1000mV/g
NOISE PERFORMANCE
Noise Density, rms
Without frequency compensation
FREQUENCY RESPONSE
3dB Bandwidth - uncompensated
TEMPERATURE OUTPUT
Tout Voltage
Sensitivity
VOLTAGE REFERENCE OUTPUT
VRef output
Change over Temperature
@3.0V-5.25V supply
Current Drive Capability
Source
SELF TEST
Continuous Voltage at AOUTX, AOUTY under
Failure
Continuous Voltage at AOUTX, AOUTY under
Failure
@5.0V Supply, output rails to
supply voltage
@3.0V Supply, output rails to
supply voltage
AOUTX and AOUTY OUTPUTS
Normal Output Range
@5.0V Supply
Current
Source or sink, @ 3.0V-5.25V supply
Turn-On Time
@5.0V Supply
@3.0V Supply
POWER SUPPLY
Operating Voltage Range
Supply Current
@ 5.0V
Supply Current
@ 3.0V
TEMPERATURE RANGE
Operating Range
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.
MXR2999E
Min Typ Max
±0.5
0.5
±1.0
±2.0
1.0
Units
g
% of FS
degrees
%
950
1000
1050
mV/g
+120
%
-55 %
<3.0 %
-0.1 0.00 +0.1 g
2.40 2.50 2.60 V
±0.4 mg/°C
±0.4 mV/°C
0.2 0.4 mg/ Hz
15 17 19 Hz
1.15 1.25 1.35 V
4.6 5.0 5.4 mV/°K
2.4 2.5 2.65 V
0.1 mV/°C
100 µA
5.0 V
3.0 V
1.0 4.0 V
100 µA
160 mS
300 mS
3.0 5.25 V
2.7 3.8 4.1 mA
3.2 4.0 4.8 mA
-40
+105
°C
MEMSIC MXR2999E Rev.G
Page 2 of 8
2/26/2007


Part Number MXR2999E
Description Dual Axis Accelerometer
Maker MEMSIC
Total Page 8 Pages
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