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OPA2210: Maximum output source current when output voltage is less than 7.5V

Part Number: OPA2210
Other Parts Discussed in Thread: TINA-TI

Hi Team,

Could you please tell the maximum output current when the output voltage is less than 7.5V? Because the datasheet only has the curves when output is larger than 12V. 

From the picture, it can be seen that the smaller output voltage, the larger output current. Does it mean that if the output voltage is less than 7.5V, the output current is larger than 38mA?

Thanks and Best Regards!

Hao

  • Hi Hao,

    yes, the output current can be larger than 38mA. If the output voltage is 0V, finally, the "short-circuit current" will flow, which is 65mA, according to the datasheet.

    hao.TSC

    Kai

  • Hi Hao,

    To add to Kai's response, keep in mind that the short circuit current may not represent linear operation of the op amp, so distortion is possible. The claw curve you attached above represents the maximum available output swing of the op amp as more and more current is pulled from its output:  for example, at room temperature with a 50mA load on the output, the amplifier can only swing to ~2.5V of its positive supply. Since the OPA2210 SPICE model does model output swing vs. output current, this behavior can be simulated: 

      From this simulation, when sourcing ~54mA, the OPA2210 has a typical output swing of ~7.5V at room temperature on ±15V supplies.

    I am attaching my TINA-TI simulation file here if you would like to test this simulation.