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Document: Datasheet Date: 17-Jul-11 Model #: 1156 Product’s Page: www.sunrom.com/p-520.html

Acceleration/Vibration/Tilt Sensor – 3 Axis Accelerometer sensor can measure static(earth gravity) or dynamic acceleration in all three axis. Application of the sensor is in various fields and many applications can be developed using this sensor. Accelerometer sensor measures level of acceleration where it is mounted this enable us to measure acceleration/deceleration of object like car or robot, or tilt of a platform with respected to earth axis, or vibration produced by machines. Sensor provides 0G output which detect linear free fall. Sensitivity can be adjusted in two ranges. Acceleration is a vector force which has direction and measured in meters per second. Earth produces gravitational acceleration on all objects on earth. By monitoring the three axis acceleration one can measure the level of tilt of any platform.

Features • Simple to use • Analog output for each axis • +5V operation @1ma current • High Sensitivity (800mV/g @ 1.5g) • Selectable Sensitivity (+- 1.5g, +- 6g) • 0g detect for free fall detection • Robust design, high shock survivability • Low Cost

Applications • 3D Gaming: Tilt and Motion Sensing, Event Recorder • HDD MP3 Player: Freefall Detection • Laptop PC: Freefall Detection, Anti-Theft • Cell Phone: Image Stability, Text Scroll, Motion Dialing, E-Compass • Pedometer: Motion Sensing / PDA: Text Scroll • Navigation and Dead Reckoning: E-Compass Tilt Compensation • Robotics: Motion Sensing

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Specifications Board Supply Voltage +5 V DC Board has regulator IC to convert

+5V to 3.3V DC since sensor IC operates on 3.3V only

Operation Current 1 ma

Operating Temperature -40 to +85 deg Celsius

Zero G output voltage (X,Y,Z) 1.65V Idle output is VDD/2

So 3.3V/2=1.65V

Output on Sensitivity Range 1.5g

Output on Sensitivity Range 6g

800mV per g

200mV per g

The device can measure both + and – acceleration. With no input acceleration the output is at midsupply.

For positive acceleration the output will increase above 1.65V

For negative acceleration, the output will decrease below 1.65V

0g Detect +3.3V output on detect

+0V output on idle mode

Active High 3V signal on free fall

The sensor offers a 0g-Detect feature that provides a logic high signal when all three axes are at 0g. This feature enables the application of Linear Freefall protection if the signal is connected to an interrupt pin or a poled I/O pin on a microcontroller.

Sensitivity Select Selection between two sensitivities can be made by closing or opening the two pad contact on board. You can close the contact by soldering the two pads together. Factory supplied is open=1.5g (800mV/g) setting which is maximum sensitivity which should be suitable for most applications. Pad Sensitivity Output Voltage Open (Default Supplied) 1.5g 800mV per g Close (Shorted) 6g 200mV per g Sensitivity Select Pads

Sunrom Technologies Your Source for Embedded Systems Visit us at www.sunrom.com

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