AFE4400: Please review the schematic

Chase Jeong

Part Number: AFE4400

Dear TI experts,

My customer drew their first schematic with AFE4400. Could you review it?

And please check the questions below ;

1. They want to light green LED and photodiode on at the same time. Please guide me about software control.

2. They want to control the brightness of these 2 LEDs separately. Please also guide me about software control.

Best regards,

Chase

0 ChienChun Yang over 3 years ago

Hi,

Will try to get back to you around next Friday 8/11.

Thanks,

Chien

0 ChienChun Yang over 2 years ago in reply to ChienChun Yang

Hi,

Please compare the schematic with the EVM's schematic design.

E.g.

Blue mark - C36 might be optional, but it's okay to keep there for test and flexibility.

Red mark - please double check to improve. Are ANA_SUP and DIG_SUP sharing the same VDD? The noise from DIG_SUP may couple to the ANA_SUP.

In EVM, DIG_SUP and ANA_SUP are separated by some LC low pass filters -

Thanks

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