DS90UB933-Q1: AC-coupling capacitor for coax application

K.Yaita

Part Number: DS90UB933-Q1

Hi Team,

The datasheet recommends C1=0.1uF and C2=0.047uF for coax application.
Could you tell me the background why C2 should be set approximately half capacitance value compared to C1?
Is C2=0.1uF problem?

Best Regards,
Yaita

over 6 years ago

0 Steven(Shenzhen) Shi over 6 years ago

TI__Mastermind 30515 points

Yaita,

for coax cable application, it is equal to single-end signal transmission, and it has one more cap. in the paired side (de-ser side), so the C1 value is double to make the diff. output pins have equivalent AC coupling cap.

rregards,

Steven

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DS90UB933-Q1: AC-coupling capacitor for coax application