LMP7702: Can a noise simulation of LMP7702 be run on TINA-TI?

Kazuya Nakai59

Guru 20750 points

Part Number: LMP7702
Other Parts Discussed in Thread: LMP7721, , TINA-TI

Hello guys,

One of my customers wants to run a circuit simulation of a transimpedance amplifier circuit for a photodiode with LMP7702 or LMP7721 using TI simulator, TINA-TI or PSPICE for TI.
Also they wants to run the following simulations.
1. noise simulation.
2. frequency-gain/phase
3.Input pulse signal response

Which simulator is better to run the above simulation?

Also If you know, please tell me any document which explain how to use the simulator for above simulations?

Your reply would be much appreciated.

Best regards,
Kazuya.

over 2 years ago

0 Michael Steffes over 2 years ago

Guru 48395 points

Well there is quite a bit out there, but a quick file search I find these older Zt files in TINA for the LMP7721 - I was testing a new model update at the time,

LMP7721 Zt Closed loop.TSC LMP7721 Zt LG input break.TSC

0 Michael Steffes over 2 years ago in reply to Michael Steffes

Guru 48395 points

Turns out I had done quite a lot of model testing on the 2019 model update, eventually found that updated model's input C was way too high which will mess up Zt simulations - the bottom of this file fixes that with external negative C allowed by TINA (not sure Pspice allows that), at the time I think I was doing quite a lot of Zt work, and having that input C in the model correctly is a critical need in that app.

7801.Testing the old against the new LMP7721 TINA models.docx