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DAC53608EVM: 5V VREF Option & GUI Composer Register Map Settings

Part Number: DAC53608EVM
Other Parts Discussed in Thread: DAC53608

Hi there, 

I'm Zeming, FAE at TI Japan. My customer is evaluating DAC53608 using the EVM.

According to the EVM user guide, VREF was set as 2.5V by default. He changed the jumper J7 of BOOSTXL board from 2-3 to 1-2 to select 5V VREF, but there was no output. Is 5V VREF available? If so, how to configure it?

Also, He used GUI Composer Register Map to configure output value following the EVM user guide, but output didn't change and always remained zero. Could you please tell me the correct steps to use Register Map?

Regards,

Zeming Kong

  • Hi,

    To configure the EVM to use 5V ref there are multiple methods.

    1. If EXT_VDD is given by user, then follow below settings

    J7 ---> position 1 & 2

    J6 ---> position 2 & 3 

    J3 ---> position 1 & 2

    2. If EXT_VDD is not given by user and VDD is the only available supply ( Normal EVM use case scenario), follow below settings

    J6 ---> position 1 & 2

    J3 ---> position 1 & 2

    Make sure VDD is 5V in this case (J9 position 1 & 2)

    Let me know after doing this, you are getting 5V reference on DAC.

    Regards,

    AK

  • Hi AK, 

    Thanks a lot for your reply. There seems to be no more problem for the 5V ref.

    And could your please explain how to use Register Map of the GUI Composer?

    We followed the user guide steps like below, 

    1. Turn to Deferred Mode

    2. Select a register and configure the output value

    3. Press WRITE REGISTER button

    Then output should show the same value as configured, but actually we got no output.

    Regards,

    Zeming

  • Hi,

    Can you outline the registers you wrote to get the DAC outputs?

    By default all DAC outputs will be in powered down state.  You need to write into DEVICE_CONFIG ( address 0x01h) register first to enable the DAC outputs.

    Then write into DAC_DATA register to get the desired outputs.

    Easy way to get the DAC outputs is go to DAC Quick Start page , and enable the toggle switches, automatically all the DAC's will be powered up.

    Also please note that DAC_DATA registers are write only in the software. GUI is written in such a way that, after DATA write, immediately read is issued. So for DATA register you may see all zeros. But DAC outputs update will happen irrespective of the read value. This is only for DATA registers.

     Also make sure the GUI is showing EVM is connected in the bottom left portion of the GUI.

    Let me know if you need more help here

    Regards,

    AK

  • Hi Ak,

    My customer told me that he could use 5V REF and Register Map properly now.

    I really appreciate your support!

    Regards,

    Zeming