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User's Guide

SLOU402 – June 2015

DRV-ACC16-EVM Accelerometer User’s Guide

The DRV-ACC16-EVM is a three-axis accelerometer for use in lab acceleration or vibration testing of
haptic feedback systems. The accelerometer allows vibrations to be quantified making haptic feedback
evaluation, reporting, and comparisons easier.

This document contains instructions and general guidelines for using the DRV-ACC16-EVM and
measuring acceleration.

Features

Measure X, Y, and Z acceleration simultaneously using three independent analog outputs

Connect to oscilloscope for simple acceleration readings

Up to 16

g

peak

acceleration measurements

Small size and flex cable, minimize interference with natural motion of the system

Kit Contents

DRV-ACC16-EVM accelerometer board

Micro-USB cable for power

Texas Instruments Black Carrying and Storage Case

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SLOU402 – June 2015

DRV-ACC16-EVM Accelerometer User’s Guide

Submit Documentation Feedback

Copyright © 2015, Texas Instruments Incorporated

Summary of Contents for DRV-ACC16-EVM

Page 1: ...ACC16 EVM and measuring acceleration Features Measure X Y and Z acceleration simultaneously using three independent analog outputs Connect to oscilloscope for simple acceleration readings Up to 16 gpeak acceleration measurements Small size and flex cable minimize interference with natural motion of the system Kit Contents DRV ACC16 EVM accelerometer board Micro USB cable for power Texas Instrument...

Page 2: ... Z Axis Acceleration Measurement 8 12 Piezo Module 8 13 X Axis Acceleration Measurement 8 14 LRA Mounting Stack Up 9 15 Click and Release Effect 10 16 Ramp Up and Pulsing Effect 11 17 Screw Hole Footprint 11 18 DRV ACC16 EVM Schematic 12 19 DRV ACC16 EVM Top Overlay 13 20 DRV ACC16 EVM 13 21 DRV ACC16 EVM Top Layer 13 22 DRV ACC16 EVM Bottom Layer 13 23 DRV ACC16 EVM Bottom Solder 13 24 DRV ACC16 ...

Page 3: ...1 Required Equipment and Materials DRV ACC16 EVM accelerometer board Micro USB cable for power Oscilloscope for measuring voltage Adhesive transfer tape see Mounting Guidelines 1 2 Quick Start Connections Figure 1 Board Connections 1 Attach the small accelerometer board to the vibrating object 2 Connect an oscilloscope to test points X Y and or Z 3 Provide USB 5 V power 1 3 DRV ACC16 EVM Specifica...

Page 4: ...unting and measuring acceleration with the DRV ACC16 EVM 1 Attach the small accelerometer board to the surface of the vibrating object Use the 3M tape adhesive on the bottom of the board to attach it to the surface Figure 2 3M Tape on Backside of Figure 3 Attach Accelerometer to Vibrating DRV ACC16 EVM Object 2 Place the vibrating object on a soft surface such as packing foam bubble wrap silicone ...

Page 5: ...rce such as a computer or USB charger 5 AC couple the measurement channels on the oscilloscope and reduce the V div to 50 100 mV The V div may need to be adjusted later 6 As the object vibrates the acceleration should appear as a sine wave on the oscilloscope 7 Convert the voltage to units of gravity The conversion ratio is shown in Equation 1 57 mVpeak 1 gpeak 1 5 SLOU402 June 2015 DRV ACC16 EVM ...

Page 6: ...an be AC coupled to only show changes in acceleration This is recommended for measuring the acceleration of haptic systems Figure 5 AC Coupled Accelerometer To calculate the acceleration take the peak voltage of a single accelerometer output and divide by 57 mV Every 57 mV of peak voltage corresponds to 1 g of peak acceleration 2 Vpeak measured peak voltage on test point X Y or Z Figure 6 Accelero...

Page 7: ...by connecting to the Y and Z test points of the accelerometer The axis of vibration can often be found in the actuator datasheet if not the axis is usually easily determined by measuring all axes and finding the axis with the highest acceleration Below are example diagrams of ERM LRA and Piezo actuators and their axes of vibration NOTE Not all actuators will have these same axes of vibration 4 1 E...

Page 8: ...A Figure 11 Z Axis Acceleration Measurement 4 3 Piezo Figure 12 illustrates a piezo module A Piezo module is made using a thin piece of piezo a piezo bender a mass and a mechanical housing The piezo bender and mass will move side to side when a high voltage sine wave is applied to the module s input terminals Figure 12 Piezo Module Figure 13 X Axis Acceleration Measurement 8 DRV ACC16 EVM Accelero...

Page 9: ...ion to compare actuator strengths run life tests or create haptic effects The best way to measure acceleration is to mount the actuator on a fixture that has similar mass to the final application We call this a haptic test fixture To do this 1 Create a test fixture that has a similar size and weight as the final application An aluminum or similar material block works well for most applications 2 P...

Page 10: ...ge waveform is the output voltage of the DRV2605L Figure 15 Click and Release Effect Equation 3 is the measured acceleration calculation for Figure 15 3 The peak to peak voltage of the accelerometer voltage waveform is divided by 2 to obtain the peak voltage and then divided by 57 mVp to calculate the acceleration 10 DRV ACC16 EVM Accelerometer User s Guide SLOU402 June 2015 Submit Documentation F...

Page 11: ...ternatively use the Math function to find the acceleration at each point in the graph automatically 8 Screw Hole Dimensions The accelerometer board can be mounted using the screw holes shown in Figure 17 Figure 17 is the screw hole mechanical footprint Figure 17 Screw Hole Footprint 11 SLOU402 June 2015 DRV ACC16 EVM Accelerometer User s Guide Submit Documentation Feedback Copyright 2015 Texas Ins...

Page 12: ...Board Sense Board 0 01µF C2 0 01µF C3 0 01µF C4 1 2 3 4 5 6 7 10 11 8 9 J1 ZX62 B 5PA 11 0 R2 0 1µF C1 GND GND GND X Y Z VDD USB 5V 5V Schematic Layout and Bill of Materials www ti com 9 Schematic Layout and Bill of Materials This section contains the schematic PCB layout and bill of materials 9 1 Schematic Figure 18 illustrates the DRV ACC16 EVM schematic Figure 18 DRV ACC16 EVM Schematic 12 DRV ...

Page 13: ...cuit board PCB layout Figure 19 DRV ACC16 EVM Top Overlay Figure 20 DRV ACC16 EVM Figure 21 DRV ACC16 EVM Top Layer Figure 22 DRV ACC16 EVM Bottom Layer Figure 23 DRV ACC16 EVM Bottom Solder 13 SLOU402 June 2015 DRV ACC16 EVM Accelerometer User s Guide Submit Documentation Feedback Copyright 2015 Texas Instruments Incorporated ...

Page 14: ...erials www ti com Figure 24 DRV ACC16 EVM Drill Drawing Figure 25 DRV ACC16 EVM Board Dimensions 14 DRV ACC16 EVM Accelerometer User s Guide SLOU402 June 2015 Submit Documentation Feedback Copyright 2015 Texas Instruments Incorporated ...

Page 15: ...ials Figure 25 illustrates the DRV ACC16 EVM fabrication drawing Figure 26 DRV ACC16 EVM Fabrication Drawing 15 SLOU402 June 2015 DRV ACC16 EVM Accelerometer User s Guide Submit Documentation Feedback Copyright 2015 Texas Instruments Incorporated ...

Page 16: ...C J1 1 Connector Receptacle Micro USB Type B R A Micro USB B ZX62 B 5PA 11 Hirose Electric Co Ltd Bottom Mount SMT receptacle LED1 1 Green LED Green SMD 1 6x0 8x0 8mm LTST C190GKT Lite On R1 1 1 50k RES 1 50k ohm 1 0 063W 0402 0402 CRCW04021K50FKED Vishay Dale R2 1 0 RES 0 5 0 063 W 0402 0402 ERJ 2GE0R00X Panasonic TP1 TP2 TP3 3 Black Test Point Multipurpose Black TH Black Multipurpose 5011 Keysto...

Page 17: ...ring the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repair such EVM or provide replacements Repaired EVMs shall be warranted for the remainder of the original warranty period Replaced EVMs shall be warranted for a new full ninety 90 day warranty period 3 ...

Page 18: ... by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated Antenna types not included in this list having a gain greater than the maximum gain indicated for that type are strictly prohibited for use with this device Concernant les EVMs avec antennes détachables Conformément à la rég...

Page 19: ... connecting any load to the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal operation even with the inputs and outputs kept within the specified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pass transistors cu...

Page 20: ...F REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE LOSS OF DATA OR BUSINESS INTERRUPTION NO CLAIM SUIT OR ACTION SHALL BE BROUGHT AGAINST TI MORE THAN ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED 8 2 Specific Limitations IN NO EVENT SHALL T...

Page 21: ...esponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failur...

Page 22: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments DRV ACC16 EVM ...

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