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MEMSIC

MXC6245XU Datasheet Preview

MXC6245XU Datasheet

Dual Axis Accelerometer

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±2g Dual Axis Accelerometer with
I2C Interface and 1mg Resolution
FEATURES
High accuracy 2-axis accelerometer:
o 2g Full Scale Range
o 1 mg/LSB resolution
o 0.3 mg/C offset drift over
temperature
o 0.5% Sensitivity matching
o 12 Bit A/D Converter
o No sensor resonance
400kHz I2C Interface (1.8V compatible)
Small, 6-pin 3 x 3mm Ceramic LCC package
Operates from 2.7V to 5.5V Supply
High reliability Automotive Process and
Package
50,000g shock survivability
RoHS Compliant
Operates from -40C to +85C
MXC6245XU
APPLICATIONS
Car Navigation System
Projector Auto Keystone Correction
DSC horizontal position detect
Inclination sensing
General purpose accelerometer
DESCRIPTION
The MXC6245XU is a complete 2 axis accelerometer
system with 1mg resolution, very low 0g offset drift,
and excellent sensitivity matching. The internal status
of the sensor can be read via the I2C interface.
The MXC6245XU uses MEMSIC’s proprietary thermal
accelerometer technology. Because the sensing
element uses heated gas molecules instead of a
mechanical beam structure, the device is extremely
robust and reliable, with 50000g shock tolerance, no
possibility of “stiction,” virtually no mechanical
resonance, and very high accuracy over temperature.
This makes the device extremely well suited to harsh
or high-vibration environments, where other sensors
can exhibit false readings due to resonance or other
errors.
The MXC6245XU has built in orientation detection.
The device can be set to generate an interrupt if the
orientation of the device changes with respect to
gravity. See register $06 description for more detailed
information.
The MXC6245XU runs from a single 2.7V to 5.5V
supply over the industrial temperature range of -40 to
85C, and is packaged in a small 6-pin, 3 x 3 x 1 mm
ceramic
LCC
package.
Information furnished by MEMSIC is believed to be accurate and reliable.
However, no responsibility is assumed by MEMSIC for its use, or 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, MA 01810, USA
Tel: +1 978 738 0900
Fax: +1 978 738 0196
www.memsic.com
MEMSIC MXC6245AU Rev.C
Page 1 of 11
Formal release date: 11/16/2016




MEMSIC

MXC6245XU Datasheet Preview

MXC6245XU Datasheet

Dual Axis Accelerometer

No Preview Available !

SENSOR CHARACTERISTICS:
(TA=25C, VDD= 5V, unless otherwise specified. Typical values are specified at 25C)
Parameter
Conditions
Min Typ Max
Full Scale Range
Sensitivity
Zero-g Bias
Sensor Bandwidth
TA=25C
Temperature Drift (-40 to +85C)1
X/Y Matching over Temperature (-40 to +85C)1,4
TA=25C
Temperature Drift (-40 to +85C)1
(Note 2)
975
2
1024
±6
±0.3
±10
±0.1
11
1075
±8.5
±0.5
±30
±0.3
Input Referred Noise
Total RMS Noise, ODR = 100Hz
1.5
Resonance
(Note 3)
Undetectable
Note 1:
Note 2:
Note 3:
Note 4:
Established statistically at the average value 3 standard deviations from 30 pieces x 3 lot characterization data
The sensor has an inherent low pass filter characteristic, which is very effective in attenuating out of band vibration.
The thermal accelerometer sensors use heated gas molecules, and have no measurable resonance
Indicates how closely X and Y axis sensitivities change over temperature
Units
g
LSB/g
%
%
mg
mg/C
Hz
mg RMS
Hz
ELECTRICAL SPECIFICATIONS:
(TA=25C, VDD= 5V, unless otherwise specified. Typical values are specified at 25C)
Parameter
Conditions
Min Typ Max Units
Supply Voltage
2.7 5.5 V
Supply Current
Operating Mode
Sleep Mode
0.8 3
0.5 1
mA
uA
Operating Temperature
-40 85 C
A/D Sample Frequency (Fs)
100 kHz
Output Data Rate
100 Hz
Wake Time
(After exiting Sleep mode)
300 500
ms
Power On Time
(After Vdd Rising Edge)
300 500
ms
Power On Reset Threshold
0.8 1.2 1.6
V
VDD Rise Time
(Note 5)
8 ms
Note 5: Maximum allowable power supply rise time from 0.25V to 2.5V (minimum). Slower VDD rise time may cause erroneous data retrieval
from OTP memory at power-up
DIGITAL PARAMETERS (Note 6)
(TA=25C, VDD= 5V, unless otherwise specified. Typical values are specified at 25C)
Parameter
Conditions
Min Typ Max Units
Logic Input Low
SDA, SCK Inputs
0 0.3*VIO
V
Logic Input High
SDA, SCK Inputs
0.7*VIO VIO
V
Logic Output Low
SDA, INT, Sinking 0.5 mA (Note 7)
0.1*VIO
V
Logic Output High
INT, Sourcing 0.5 mA (Note 7)
0.9*VIO
1.1*VIO
Note 6:
Note 7:
VIO is automatically detected using a peak-hold circuit on the SCK pin. The SCK or SDA voltage should not remain in the LOW state for
more than 10ms.
The output driver is capable of sourcing and sinking much higher currents, but it is recommended to keep the load current below 0.5mA
to avoid thermal gradients which may affect the zero-g offset.
MEMSIC MXC6245AU Rev.C
Page 2 of 11
Formal release date: 11/16/2016


Part Number MXC6245XU
Description Dual Axis Accelerometer
Maker MEMSIC
Total Page 11 Pages
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