Tool/software:
Hi!
In the OPA549 Simulation (attached the screenshot as well as the simulation file), I get an error stating, "Pin OUT of Subcircuit U1 is in conflict with Pin OUT2 of subcircuit U1" (same for U2 as well).
The datasheet of OPA549 does say to short both the output pins and that is what I am doing in the schematic as well. So, why this error?
Also, how do I fix it? Do I have to worry about this error at all?
Regards,
Chetan.
Hi Chetan,
This error is purely SPICE related, you have correctly connected your outputs. In SPICE, the simulator considers OUT1 and OUT2 to be different nets, and requires that these netes not be shorted together. The easiest way to solve this problem involves installing a 0-Ohm resistor in series with one of the outputs. This allows the DC bias to check for shorts while allowing the outputs to electrically function in parallel (like the real device).
I have reworked your circuit with a few changes.
Note, the OPA549 cannot use +-60V, so I set your supplies to +-30V. I also removed the decoupling caps from the simulation as these do not have any impact on the TINA simulations unless you have trace inductance/trace resistance modeled. Please do include these caps in the real design though :). I like using Jumpers as well, it makes reading a schematic a bit easier.
Please reach out if you have any questions.
Best,
Jacob
