OPA607-Q1: PSpice model, simulations, saturation

Hi Cvetan,

can you please show a schematic?

Kai

Hello Kai,

Hi Cvetan,

works for me in TINA-TI:

cvetan_opa607.TSC

Maybe you should explicitely connect "V-" in your simulation to "signal ground"?

Kai

And with floating current source and shunt:

Kai

Hello Kai,

Thanks a lot for your work!

Obviously, the TINA model works and the simulations in TINA are successful.

I would still expect any comments and suggestions regarding the PSPICE model. Meanwhile I will check again.

Hi Cvetan,

have you tried to explicitely connect "V-" in your simulation to "signal ground"?

Another trick is to modify the circuit from using a single supply to bipolar supply voltages.

Kai

Hello dear Kai,

The "V-" net is connected to signal GND through a 100uOhm resistor, as TI is implementing in some of its application circuits for simulation.

Cvetan

Can you remove R2 and directly connect "V-" to "signal ground"? Would this help?

Kai

Hello Cvetan,

  Did Kai's suggestion fix the issue in PSpice?

Thank you,

Sima 

Hello Sima,

The Kai's suggestion did not fix the issue, the same simulation result.

Best regards,

Cvetan

Hello Cvetan,

  Thank you for trying the suggestion. I will recreate the circuit on my end, and update you on the results.

Best Regards,
Sima