I can't understand IIC address。
I use AD5121.
I don't know the meaning of the above two pictures
Here's what I wrote.
ADDR0 and ADDR1 are physical pins (check pin description section of the data sheet).
The combination of the logic states of these 2 pins will define the "device address" i2c frame you need to send to the device.
For example, if both pins are logic state = LOW, then you need to send 0101111 as your address.
Do you get ACK from the device? If yes then you are doing the right thing.
If vlogic=5v ， DIS=3.3V。 Can I set the chip to IIC mode?
I can not get ACK form the device。
You need at least 3.5V. Just tie DIS pin to VLOGIC.