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DAC3152: DVDD18

KAEDE KUDO
Expert 2700 points
Part Number: DAC3152

Hello,

My customer has a question about DAC3152.

[Q]
I have a question about DVDD18 of DAC 3152.

In the circuit diagram of the EVM,

+ 1.8 VD is supplied to DVDD18 of 15 pins and 33 pins,

+1.8 VDAC is supplied to the DVDD18 of 41 pin.

Should I separate the power supply according to the EVM circuit diagram?

Also, is there a different meaning for the 41 pin DVDD18?

Best Regards,

Kaede Kudo

  • 0
    TI__Guru* 91497 points

    Kaede,

    You can use the same supply for pins 15, 33 and 41. This also should be tied to pin 36 (VFUSE). There is not a different meaning for pin 41. If you are using a common regulator for all of the +1.8V inputs, I would isolate the two groups (pins 15, 33, 36, 41) and (pin 44) with ferrite beads as shown in the EVM schematic. Even though the EVM schematic used 3 ferrite beads, I think you can combine the +18VD with +1.8VDAC and get by using only two beads.

    Regards,

    Jim