AFE4404EVM: How is the calibration?

user1558531

Part Number: AFE4404EVM

When I use calibration function, the data looks strange. The led1-amb is not equal to led1 minus amb, and it keep constant, which is not reasonable I think. Is there any tricky in it?

LED1-

over 7 years ago

0 Prabin Yadav over 7 years ago

TI__Genius 12575 points

Hi,

Can you try without calibration enabled to make sure that setup/AFEE4404/EVM is working as expected?

Regards,
Prabin

0 user1558531 over 7 years ago in reply to Prabin Yadav

Prodigy 70 points

I tried to power off the board and load the default settings. It worked normally and after I selected the calibration option it became unreasonable.

0 Prabin Yadav over 7 years ago in reply to user1558531

TI__Genius 12575 points

Hi,

This is expected because after you enable the calibration routine, the algorithm inside the EVM will take over the control.

Regards,
Prabin

0 user1558531 over 7 years ago in reply to Prabin Yadav

Prodigy 70 points

But how could LED-AMB to be constant?

0 Prabin Yadav over 7 years ago in reply to user1558531

TI__Genius 12575 points

Hi,

Did you check the calibration routine about how it handles LED-AMB data?

Regards,
Prabin

0 Matt Mendez over 7 years ago in reply to Prabin Yadav

TI__Intellectual 2885 points

Hi,

I will be closing this thread as it seems to have been resolved. If you have any further questions please make a new post. Thanks!

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AFE4404EVM: How is the calibration?