AFE5851: LOW_FREQUENCY_NOISE_SUPPRESSION and VGA gain.

Torleif Jensen

Part Number: AFE5851

Tool/software:

AFE5851 has a bit called LOW_FREQUENCY_NOISE_SUPPRESSION. What exactly does this bit do?

Also, the AFE has a -6dB to +31dB VGA, however, the input stage saturates at 1V and the ADC saturates at 2V, so what sense does any gain below +6dB make? Am I missing something here?

BR Torleif.

5 months ago

0 Sachin H K 5 months ago

TI__Expert 7685 points

Hi,

It is explained in datasheet .

0 Torleif Jensen 5 months ago in reply to Sachin H K

Prodigy 10 points

You may think so, but 2 persens here read it in different ways, this is why I ask for how it works instead of what effect it has.

Also, can you explain why the gain is as it is?

BR Torleif.

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AFE5851: LOW_FREQUENCY_NOISE_SUPPRESSION and VGA gain.