OPA858: OPA858 model

Sonja Stacher

Prodigy 250 points

Part Number: OPA858
Other Parts Discussed in Thread: TINA-TI

Hello,

I am using TINA-TI for simulating my circuit and have a question regarding the OPA858 model.

Does the model include the inut capacitance or do I have to include it in my circuit using an additional capacitor?

Thank you in advance,

Sonja

over 6 years ago

0 Sima Jalaleddine over 6 years ago

TI__Mastermind 32485 points

Hello Sonja,

Just to clarify, would you be referring to the common-mode and differential input capacitance of the amplifier?

Thank you,

Sima

0 Sonja Stacher over 6 years ago in reply to Sima Jalaleddine

Prodigy 250 points

Yes, I am talking about those capacities.

Thanks,

Sonja

0 Michael Steffes over 6 years ago in reply to Sonja Stacher

Guru 48395 points

Morning Sonja,

Yes, those specified input C appear to be inthe TINA model, testing thus far shows this to be a very good model,

OPA858 model testing.docx

Extracted in this attached word file, from an earlier article, That June 2109 article lost the links in Planet Analog to expand the figures, so here is the pdf of the original,

Input Impedance Extraction and Application for High Speed Amplifiers May29.pdf

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OPA858: OPA858 model