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ADV7403 I2C Series 100 ohm Resistor

Category: Hardware
Product Number: ADV7403BSTZ-110

Hello All,

We are using ADV7403 in our design. I have design query related to I2C interface connections made in ADV7403 Eval Board Schematic.

100 ohms Series Resistor is used SDA and SCL lines of I2C. Please let us know the importance of usage of this resistor. Is 100 ohm Resistor Eval Board Requirement to interface with external board ?

We were planning to have 4K7 Pullup resistor on I2C lines(open drain) to connect with our FPGA. Please let us know.

Top Replies

  • FormerMember
+2 verified

A 100 Ohm series resistor is not needed.  Normally I'll drop a 10-22 Ohm resistor in that position although you can easily get rid of it.  The series resistor has 3 benefits in my opinion.

1) Provides…