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AD8403 - 1k Part


We want to use the AD8403-1K part for my led current control application, We have few questions as below

1) I want to use VDD voltage as 3.3V, but LED Supply as the 5V between Ra and Rw, Can it be possible? Rb we will connect to the ground.

2) Can we set/reset all four resistors at a time?

3) What is the Tolerance of the resistor in each Channel?

4) What is the wattage of the resistor? How much current flow it can handle?

5) If we don't want to us the SHDN and RS pins we need to connect them to +3.3V correct?