AFE882H1EVM: Information required for D6, D7, D8

ANURAG LOKHANDE

Intellectual 270 points

Part Number: AFE882H1EVM

Hi,

Why D6, D7, D8 considered bidirectional rather than unidirectional for positive type of input?

Regards,

Anurag

3 months ago

0 Paul_Frost 3 months ago

TI__Guru 56933 points

Anurag, we used those as the USB cable is exposed to "outside world" and felt that we wanted to ensure that EFT transients and other transients could be suppressed. In addition, we generally over-design our support circuits around our key device. In this case, we did not want to risk supporting customers on USB issues for our evaluation hardware that are not really found in the actual target application.

Thanks,

Paul

0 ANURAG LOKHANDE 3 months ago in reply to Paul_Frost

Intellectual 270 points

Hi, but it seems that for positive type input only, unidirectional clamping is good than bidirectional.

0 Erin Bowrie 3 months ago in reply to ANURAG LOKHANDE

TI__Genius 17440 points

Hi Anurag,

This is the recommended setup we were given from the FTDI controller's datasheet. You are free to replace these diodes (or remove them) if you desire.

Thanks,
Erin

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AFE882H1EVM: Information required for D6, D7, D8