MEMSIC MXD2020G/H/M/N Rev.G

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2/26/2007

Improved, Ultra Low Noise

±1.7 g Dual Axis Accelerometer

with Digital Outputs

MXD2020G/H

MXD2020M/N

FEATURES

Resolution better than 1 mg

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

17 Hz bandwidth expandable to >160 Hz

3.0V to 5.25V single supply continuous operation

Continuous self test

Independent axis programmability (special order)

Ultra low initial Zero-g Offset

APPLICATIONS

Automotive – Vehicle Security/Vehicle stability control/

Headlight Angle Control/Tilt Sensing

Security – Gas Line/Elevator/Fatigue Sensing

Information Appliances – Computer Peripherals/PDA’s/Cell

Phones

Internal

Oscillator

Sck

(optional)

CLK

Heater

Control

X axis

Y axis

Factory Adjust

Offset & Gain

Low Pass

Filter

Low Pass

Filter

Temperature

Sensor

Voltage

Reference

V

REF

D

OUTX

V

DD

V

DA

Gnd

2-AXIS

SENSOR

D

OUTY

T

OUT

Continous

Self Test

MXD2020G/H/M/N FUNCTIONAL BLOCK DIAGRAM

Gaming – Joystick/RF Interface/Menu Selection/Tilt Sensing

GPS

Consumer – LCD projectors, pedometers, blood pressure

Monitor, digital cameras

GENERAL DESCRIPTION

The MXD2020G/H/M/N is a 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 MXD2020G/H/M/N

measures acceleration with a full-scale range of

±1.7 g and

dynamic acceleration (e.g. vibration) and static acceleration

(e.g. gravity).

The MXD2020G/H/M/N 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 of 50,000

g, leading to significantly lower failure rate and lower loss

due to handling during assembly.

The MXD2020G/H/M/N provides two digital outputs that

are set to 50% duty cycle at zero g acceleration. The

outputs are digital with duty cycles (ratio of pulse width to

period) that are proportional to acceleration. The duty

cycle outputs can be directly interfaced to a micro-

processor.

The typical noise floor is 0.2 mg/ Hz allowing signals

below 1 mg to be resolved at 1 Hz bandwidth. The

MXD2020G/H/M/N is packaged in a hermetically sealed

LCC surface mount package (5 mm x 5 mm x 2 mm height)

70

°C(G/H) temperature range.

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