PGA281: how to determine values for different filters of the DAC stage at the frequency range is between 50KHz to 200KHz

Poh Kok Keng

Part Number: PGA281

hi,

Can you advice me how to determine values for different filters of the DAC stage for the frequency range between 50KHz to 200KHz on PGA281?

To better visualize, one proposed value of your filter design was 87pF, this value is very exotic and costs 100 times more than 82pF types …

Best regards,
kpk

0 kai klaas69 over 3 years ago

Guru 140200 points

Hi Poh Kok Keng,

where do you see 87pF? And what "DAC stage" do you mean?

Kai

0 Poh Kok Keng over 3 years ago in reply to kai klaas69

Genius 5122 points

hi Kai,

Sorry, let me gather more detail before i come back to you on this.

0 Luis Chioye over 3 years ago in reply to Poh Kok Keng

Hello KPK,

As Kai has mentioned, the question is not clear.

Please provide a schematic or diagram of the DAC stage you are referring to on the post above, as well as the filter schematic.

Also provide a detailed problem description and/or design requirements.

Thank you and Regards,

Luis

0 Poh Kok Keng over 3 years ago in reply to Luis Chioye

Genius 5122 points

hi Kai,

Can I send the file to you privately as it contain confidential info? Please provide the email.

Best Regards,

KPK

0 kai klaas69 over 3 years ago in reply to Poh Kok Keng

Guru 140200 points

Hi Poh Kok Keng,

as I'm not a TI's employee you might want to send it to Luis :-)

Kai

0 Luis Chioye over 3 years ago in reply to kai klaas69

Hi Poh Kok Keng,

I have received your request via private conversation,

I will continue the conversation via direct/private conversation.

Thank you and Regards,

Luis

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