TLV2771: Subcircuit TLV2771 used by X_U1 is undefined

Art Mecina

Part Number: TLV2771
Other Parts Discussed in Thread: TINA-TI, PSPICE-FOR-TI

Hello Guys,

Our customer have been trying to simulate the circuit on P Spice for TI from this link https://www.ti.com/product/TLV2771#design-development, however, whenever he try to run the simulation, the software reports "Subcircuit TLV2771 used by X_U1 is undefined".

What do you think could be the issue?

Thanks and regards,

Art

over 4 years ago

0 kai klaas69 over 4 years ago

Guru 140200 points

Hi Art,

works beautifully in TINA-TI

art_tlv2771.TSC

Kai

0 Caro Walter over 4 years ago in reply to kai klaas69

TI__Mastermind 22312 points

Thanks Kai!

Hey Art,

As Kai pointed out, the customer may use the TINA-TI model.

To debug the PSpice issue, is the customer using the model from ti.com? Or are they using the model from the integrated library inside of PSpice-for-TI?

If they are using the model from ti.com, are they following the 3rd Party import procedure? The error sounds like the customer did not configure the library within the simulation profile.

All the best,
Carolina

0 Art Mecina over 4 years ago in reply to Caro Walter

TI__Genius 16785 points

Hello Carolina,

Apologies for the late response as it took some time for the customer to get back to us on this.

They are using the PSpice model from TI.com. Below are the latest response from the customer:

"I have been trying to design the charge amplifier op amp on tina ti. However, I am not sure as to why I am not getting an amplification. I modelled the sensor as a voltage source in series with a capacitor (Which is the sensor's capacitance of 450pF) which also has a resonant frequency of 1MHz. I calculated the High frequency cut off to be 1MHz and the low cut to be 500kHz. The cable capacitance is 80pF. May you please double check the circuit for me or advise me on the way forward. I have attached the Tina TI file along with this."

Charge amplifier.TSC

Thanks and regards,

Art