TAA5212: THD+N and Noise performance

Ke Quan Tok

Intellectual 1130 points

Part Number: TAA5212

Tool/software:

Hi BU,

For TAA5212, if ADC differential input is set to 2vrms, what will the changes for THD+N and noise?

Thanks.

Regards,

John

1 month ago

0 Garret Godfrey 1 month ago

TI__Intellectual 2605 points

Hi John,

THD+N differential vs single-ended performance can be found on page 8-9 on the datasheet. Are you looking for something more specific here? The standard for measuring THD+N is to use a -1dBFS input, but the value -98dB from the data sheet is accepted as the full-scale differential THD+N.

Best,

Garret

0 Ke Quan Tok 1 month ago in reply to Garret Godfrey

TI__Intellectual 1130 points

Hi Garret,

Thank you.

Just to confirm, as long as the differential input AC signal voltage does not exceed 2 Vrms, then THD+N and SNR will maintain the spec as indicated in the datasheet right?

Regards,

John

0 Garret Godfrey 1 month ago in reply to Ke Quan Tok

TI__Intellectual 2605 points

Hi John,

The datasheet specs are only measured to fit the specific input described in the test conditions. Inputs that exceed differential 2Vrms will certainly degrade these specs, but inputs much smaller than full scale may as well.

Best,

Garret

0 Ke Quan Tok 1 month ago in reply to Garret Godfrey

TI__Intellectual 1130 points

Hi Garret,

Understood, thank you for your confirmation!

Regards,

John

0 Garret Godfrey 1 month ago in reply to Ke Quan Tok

TI__Intellectual 2605 points

You're welcome, John.

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TAA5212: THD+N and Noise performance