MXR7202ML MEMSIC, MXR7202ML Datasheet - Page 3

• Manufacturer Part Number: MXR7202ML
• Description: ACCELEROMETER, 2 AXIS, ±2G, LCC8
• Manufacturer: MEMSIC

Specifications of MXR7202ML

• No. Of Axes: 2
• Sensor Case Style: LCC
• No. Of Pins: 8
• Supply Voltage Range: 2.7V To 5.25V
• Operating Temperature Range: -40°C To +105°C
• Operating Temperature Max: 105°C
• Acceleration Range: ±2g
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Supply Voltage (V
Storage Temperature ……….…………-65°C to +150°C
Acceleration ……………………………………..50,000 g
*Stresses above those listed under Absolute Maximum Ratings may cause permanent
damage to the device. This is a stress rating only; the functional operation of the
device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
Pin Description: LCC-8 Package
Ordering Guide
Model
MXR7202GL
MXR7202GF
MXR7202ML
MXR7202MF
All parts are shipped in tape and reel packaging.
Caution:
Note: The MEMSIC logo’s arrow indicates the -X sensing
direction of the device. The +Y sensing direction is rotated 90°
away from the +X direction following the right-hand rule. Small
circle indicates pin one (1).
MEMSIC MXR7202G/M Rev.C
Pin
1
2
3
4
5
6
7
8
ESD (electrostatic discharge) sensitive device.
Name
NC
TP
COM
NC
NC
Yout
Xout
V
DD
Package Style
RoHS compliant
RoHS compliant
RoHS compliant
RoHS compliant
LCC8, Pb-free
LCC8, Pb-free
DD
)
Description
Do Not Connect
Connect to ground
Connect to ground
Do Not Connect
Do Not Connect
Y Channel Output
X Channel Output
2.7V to 5.25V
LCC8
LCC8
………………...-0.5 to +7.0V
Temperature Range
-40 to +105°C
-40 to +105°C
0 to 70°C
0 to 70°C
I/O
NC
NC
NC
O
O
I
I
I
Page 3 of 8
THEORY OF OPERATION
The MEMSIC device is a complete dual-axis acceleration
measurement system fabricated on a monolithic CMOS IC
process. The device operation is based on heat transfer by
natural convection and operates like other accelerometers
having a proof mass except it is a gas in the MEMSIC
sensor.
A single heat source, centered in the silicon chip is
suspended across a cavity. Equally spaced
aluminum/polysilicon thermopiles (groups of
thermocouples) are located equidistantly on all four sides of
the heat source (dual axis). Under zero acceleration, a
temperature gradient is symmetrical about the heat source,
so that the temperature is the same at all four thermopiles,
causing them to output the same voltage.
Acceleration in any direction will disturb the temperature
profile, due to free convection heat transfer, causing it to be
asymmetrical. The temperature, and hence voltage output
of the four thermopiles will then be different. The
differential voltage at the thermopile outputs is directly
proportional to the acceleration. There are two identical
acceleration signal paths on the accelerometer, one to
measure acceleration in the x-axis and one to measure
acceleration in the y-axis. Please visit the MEMSIC
website at www.memsic.com for a picture/graphic
description of the free convection heat transfer principle.
MXR7202G/M PIN DESCRIPTIONS
2
/26/2007