ADC12DJ5200-SP: Decoupling Analysis Questions

Daniel Sugimura

Prodigy 150 points

Part Number: ADC12DJ5200-SP

Does the package have any decoupling caps already built in? If so, do you have details you can provide?

I was wondering if you can provide the max frequency that we should analyze up to.

over 1 year ago

0 Eric Kleckner over 1 year ago

TI__Expert 6210 points

Hello Daniel,

Apologies for the delay, I am still looking into this question for, if you could give me until Wednesday 3/6/2024, that would be greatly appreciated.

Best,

Eric Kleckner

+1 Rob Reeder over 1 year ago in reply to Eric Kleckner

TI__Mastermind 41350 points

Hi Daniel,

This was confirmed, there are no on-chip caps internally of any kind.

Thanks,

Rob

0 Daniel Sugimura over 1 year ago

Prodigy 150 points

Thank you for the decoupling cap information. Do you have any input for the max frequency we should analyze the decoupling caps to?

+1 Rob Reeder over 1 year ago in reply to Daniel Sugimura

TI__Mastermind 41350 points

Hi Daniel,

I would look at this over your max input frequency, but decoupling in general will not really be effective past 500MHz, and even that is a stretch.

The best you can do, is to sandwich your internal pcb layer of the power and grounds together within 4mils or less. This will inherently build a capacitor which will be more effective at higher frequencies. You will get even more capacitance if you stackup allows for ground - power - ground, etc.

Regards,

Rob

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ADC12DJ5200-SP: Decoupling Analysis Questions