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DP83822H: Resistor on RBIAS

Part Number: DP83822H

Hi Team,

The datasheet says a 4.87k resistor must be connected to RBIAS pin.

1. Why a 4.87k resistor is required here? Can we replace it by a 4.7k resistor?

2. What's the function of this resistor? What's the internal circuit of it?

Best Regards,

Hao