OPA1692: Bode plot(cut off freq = 100kHz)

Roy Chou1

Part Number: OPA1692

Tool/software:

Hi Team,

Below is our requirements and cut off frequency is around 00kHz

May you help use below TINA file to generate the AC model that we can simulate the bode plot? And may you help modify the component value to meet cut off frequency is around 100kHz?

I118 Tran.TSC

Thank you for your great support.

Regards,

Roy

6 months ago

0 Raymond Zhang1 6 months ago

TI__Guru* 77441 points

Hi Roy,

We had the reply in this thread below.

https://e2e.ti.com/support/audio-group/audio-internal/f/audio---internal-forum/1479207/opa1692-layout-review/5696568?tisearch=e2e-sitesearch&keymatch=opa1692#5696568

OPA1692_I118 -10.8dB step transient 03062025.TSC

Do you need to have different gain settings for the audio application?

Best,

Raymond

0 Roy Chou1 6 months ago in reply to Raymond Zhang1

TI__Genius 16140 points

Hi Raymond,

Yes, as above block diagram. There are two different gain.

I tried to simulate it. May you help check it?

0318_OPA_Simulation.pptx

Regards,

Roy

0 Raymond Zhang1 6 months ago in reply to Roy Chou1

TI__Guru* 77441 points

Hi Roy,

Here are the requirements.

The both audio BPFs should work. Currently both OPA1692 op amps are configured for differential input. If the cutoff frequency (-3dB) at 100kHz looks ok for the application, then this is acceptable.

This one is measured at -8.9dB differentially, which is close to -8.87dB.

It is not clear what does -2.85dB in single-ended mean. Please let me know.

Best,

Raymond

0 Raymond Zhang1 5 months ago in reply to Raymond Zhang1

TI__Guru* 77441 points

Hi Roy,

I am going to close this query, since I have not heard from you.

If you have other questions, please let me know.

Best,

Raymond

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OPA1692: Bode plot(cut off freq = 100kHz)