Reg: Problem in Writing RDAC of AD5274 through I2C

Hello All,

I tried to change the RDAC Register value of AD5274BRMZ-20 (20K-Max) through I2C. But the resistance between the A & W pins is always constant to 9.25K(Mid Value).

I have sent the following Values through I2C.

Device Address : 0X2C (I have tried 2F also)

Command bits : 0001 (C3,C2,C1,C0)

Data: 0X3C

Attached the Image of the Waveforms. Could anyone let me know, where it went wrong.

Waveforms