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AM26C31: How affects working with the max output current?

user4096925
Prodigy 20 points
Part Number: AM26C31

The datasheet says that the current output recomended is 20mA, but if you use the 100 ohm resistor terminator, the output current would be 50mA (working with +/- 5V). The max output current is 37.5mA per channel, so the differential voltage is lower than expected.

Can this working conditions affect the durability of the driver? It is working with 37.5mA output in each channel, not 20mA as the datasheet recommends.

  • 0
    TI__Guru 62910 points
    Operating at output currents slightly beyond 20 mA is not an issue. The reason 20 mA is listed as a recommended output current is because this is the test condition at which the output voltage levels are characterized. Exceeding this level will just result in lower output differential voltage magnitudes. You should be careful not to exceed the absolute maximum output current of 150 mA, though.

    Max
  • 0 in reply to Max Robertson
    Prodigy 20 points
    The component operate with output currents of 37.5mA per channel (4 x 37.5 mA = 150 mA). As you say, the component works with lower output differential voltage magnitudes; becouse of this is imposible to exceed the absolute maximun output current of 150mA.

    I use the four channels in the same working conditions so, the component is working at maximun output current of 150mA. When the component reaches the 37.5mA output current in a channel, it can't exceed this value and it generates the reduction of the differential voltage. It works well but I would like to know if this working conditions affects to the durability of the driver.
  • 0 in reply to user4096925
    TI__Guru 62910 points
    Operating under this condition will not affect the durability of the driver.

    Regards,
    Max