Jinlong Machinery & Electronics
Model Number: CDM0834B004L
CDM0834B004L Double Magnet Coin Vibration Motor

8mm x 3.4mm | 3 V | Double Magnet Coin Vibration Motor

The CDM0834B004L is the smallest double magnet motor we manufacture. Unlike this motor, standard coin vibration motor (with brushes) are not noted for their fast rise and fall times and hence are not the best choice for haptic feedback applications. They incorporate a single magnet situated under the motors rotating voice coils / counter weight assembly, at the base of the coin motor. Our engineers recently discovered that by adding a second magnet above the voice coil / counter weight assembly, effectively sandwiching it between both magnets, many of the vibration motors performance characteristics dramatically improved.  Most notable is that this “Double Magnet”  design greatly improved the rise / fall times as well as the G force.  Power consumption is comparable to that of the single magnet design.

Model # Tech Type Rise Time Fall Time G force Current (mA) Vibration Frequency Driver IC Required
CDM0834B004L Double Magnet 35 50 1.40 48 167 NO
C0834B011F BRUSH 90 50 0.85 69 200 NO
G0832012 LRA 50 80 1.40 58 235 YES
W0825AB001G BRUSHLESS 70 90 1.00 54 250 NO

As can be seen from the table above, the rise / fall times are better than that of an LRA and there is no need for an external driver IC.  They can be driven with DC voltage and do not require an external driver IC.   Being a brush type motor, double magnet vibration motors have a lifetime of 100K cycles (min) which is not as good as that of a coin type LRA  (1000K cycles).    Pricing is slightly higher than that of a standard single magnet, brush type, coin vibration motor, but about 30% less than that of an LRA and even more so if you factor in the required driver IC for the LRA.   This motor is available with connector and custom lead lengths.

Summary Of Specifications
Technology Type: DOUBLE-MAGNET
Diameter (mm): 8.0
Thickness (mm): 3.4
Rated Voltage (Vdc): 3.0
Operating Voltage (Vdc): 2.5~3.5
Rated Current MAX (mA): 75
Typical Current (mA): 48
Rise Time (ms) MAX *: 35
Fall Time (ms) MAX *: 50
Rated Speed (rpm): 10000
Vibration Force (G): 1.40
* at 50% of Maximum G force
CDM0834B004L Double Magnet Coin Vibration Motor Mechanical Drawing

This part is not authorized for Life Supporting Devices
None of the products offered for sale by us are authorized for use in any device that:

  1. is surgically implanted into the body
  2. supports or sustains life, and whose failure to perform as per our specification,
    may result in serious injury or death of the user.

CDM0834B004L Double Magnet Coin Vibration Motor 04CDM0834B004L Double Magnet Coin Vibration Motor 05CDM0834B004L Double Magnet Coin Vibration Motor 06CDM0834B004L Double Magnet Coin Vibration Motor 07CDM0834B004L Double Magnet Coin Vibration Motor 08CDM0834B004L Double Magnet Coin Vibration Motor 09CDM0834B004L Double Magnet Coin Vibration Motor 10CDM0834B004L Double Magnet Coin Vibration Motor 11CDM0834B004L Double Magnet Coin Vibration Motor 13CDM0834B004L Double Magnet Coin Vibration Motor 14

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