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Coin Linear Vibration Motors (LRA’s) |
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Due to their fast Rise and Fall times, linear resonant actuators (LRA) vibration motors are an excellent choice for haptic / tactile feedback applications. Their simple internal construction offers high reliability and exceptionally long life when compared with brush type ERM coin vibration motors. It should be noted that LRA’s can not survive the high temperatures of a reflow oven and hence we do not offer a SMD reflow version. HERE to see a cross section of a typical LRA and HERE for a comparison of LRA’s vs. Brush Type Motors. LRA’s are unique in that they can be driven at very low voltage levels ( ~ 0.1 Vac ) with a current as low as 12 ma, allowing engineers to tailor the vibration level to the minimum required, thus extending the devices battery life. Usability studies should to be conducted to determine the minimum acceptable level of vibration G force for the application, and then the Haptic Driver IC programmed accordingly. Our coin shaped linear resonant actuators oscillate along the Z axis, perpendicular to the motors surface. This Z axis vibration efficiently transmits vibrations in wearable applications. In Hi-Rel applications, they are a viable alternative to brushless vibration motors as the only internal parts that are subjected to wear / failure are the springs. (continued below the table ) |
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Part Number  |
Old P/N | Image  |
Tech. Type |
Config. Type | Motor Size (mm) | Voltage | Current (mA) |
Response Time (ms) - 50% of power - w/o Haptic Driver |
Res. Freq (hz) |
Vibe Force (G) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dia | Thickness | Rated | Operating | Rated MAX |
Typical* Avg. |
Rise Time | Fall Time | |||||||
VG0640001D 
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G0640001D |
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LRA | 3 | 6.0 | 4.05 | 1.8 Vac | 0.5~1.8 Vac | 80 | 58 | 15 | 70 | 210 | 0.90 |
| VG0825001D | G0825001D |
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LRA | 1 | 8.0 | 2.5 | 1.2 Vac | 0.1~1.9 Vac | 60 | 48 | 50 | 50 | 240 | 0.75 |
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VG0825002D
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LRA | 7 | 8.0 | 2.65 | 1.2 Vac | 0.1~1.25 Vac | 60 | 48 | 50 | 50 | 240 | 0.75 | |
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VG0825003D
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LRA | 2 | 8.0 | 2.55 | 1.2 Vac | 0.1~1.25 Vac | 60 | 48 | 50 | 50 | 240 | 0.73 | |
| VG0832008 | G0832008 |
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LRA | 4 | 8.0 | 3.25 | 1.8 Vac | 0.1~1.85 Vac | 80 | 58 | 50 | 80 | 235 | 1.80 |
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VG0832009L
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LRA | 2 | 8.0 | 3.25 | 1.8 Vac | 0.1~1.85 Vac | 80 | 58 | 50 | 80 | 235 | 1.80 | |
| VG0832012 | G0832012 |
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LRA | 1 | 8.0 | 3.25 | 1.8 Vac | 0.1~1.85 Vac | 80 | 58 | 50 | 80 | 235 | 1.80 |
| VG0832013D | G0832013D |
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LRA | 1 | 8.0 | 3.25 | 1.8 Vac | 0.1~1.85 Vac | 80 | 58 | 50 | 80 | 235 | 1.80 |
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VG0832014L
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G0832014L |
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LRA | 2 | 8.0 | 3.25 | 1.8 Vac | 0.1~1.85 Vac | 80 | 58 | 50 | 80 | 235 | 1.80 |
| VG0832022D | G0832022D |
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LRA | 1 | 8.0 | 3.25 | 1.8 Vac | 0.1~1.85 Vac | 80 | 58 | 50 | 80 | 235 | 1.80 |
| VG0840001D | G0840001D |
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LRA | 3 | 8.0 | 4.05 | 2.0 Vac | 0.1~2.0 Vac | 90 | 68 | 12 | 55 | 170 | 1.80 |
| VG1040003D | G1040003D |
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LRA | 3 | 10.0 | 4.0 | 2.5 Vac | 0.1~2.5 Vac | 170 | 145 | 10 | 50 | 170 | 2.00 |
| VG2080001D |
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LRA | 4 | 20.0 | 8.0 | 1.8 Vac | 1.0~2.0 Vac | 200 | 170 | 20 | 60 | 130 | 1.60 | |
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The “typical current” is the average current from 20 motors selected at random from a given production lot. Copies of the test report showing the data collected for all 20 motors are available upon request. |
NOTES:
- Custom wire length are available for MOQ: 2K pcs
- We can add connectors for MOQ: 2K pcs
- Custom FPC’s are available for MOQ: 5K pcs.
- Tooling and design fees will apply for custom FPC’s
Unlike conventional brush type DC vibration motors, linear resonant actuators must be driven by an AC signal at the LRA’s resonant frequency. They can not be driven directly from a DC voltage source. The wire leads are typically different colors however the wires do not have polarity as the drive signal is AC , and not DC. A few companies make IC drivers for linear vibration motors that supply the correct drive signals and contain a library of haptic effects you can choose from. TI makes LRA drivers IC’s. TI makes an engineering evaluation board that uses the TI DRV2605L haptic driver IC. See below link for info:
http://www.digikey.com/en/product-highlight/t/texas-instruments/drv2605-haptic-driver
Unlike brush type ERM vibration motors, changing the amplitude of the drive voltage will only change the amplitude of the G force, not the frequency of vibration. Because of the LRA’s narrow band width / High-Q, applying a frequency above or below the resonant frequency of the LRA will result in the LRA producing a lower vibration amplitude or if far from the resonant frequency, none at all. Please note we not offer wide band LRA’s as well as LRA’s that operate on multiple resonant frequencies.
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