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OPA320: OPA320 max. sink current capability

Wei-Hao Chen (TW-FAE)
Expert 3260 points
Part Number: OPA320

Hi support team,

Could you please provide the maximum sink current capability at VOL across full temp range? Do we use output voltage swing to calculate the maximum sink current i.e. 

Many thanks.

Best Regards,

Wei-Hao

  • 0
    TI__Guru 67881 points

    Wei-Hao,

    The maximum sinking/sourcing current of any op amp is the short-circuit current and in case of OPA320 it is specified as typical +/-65mA - see below.

    Having said that, the swing to the rail is a function of the output current - the more current op amp sinks its swing to negative rail will be higher - see curves below.

    Just be aware that in order to force the op amp to sink current you must use a close-loop configuration and drive the output towards negative rail with the load connected to a voltage above negative rail (you may NOT use an open-loop configuration shown on your schematic above).