DAC81408: POWER SUPPLY DESIGN (VCC & VSS PINS)

VJohn

Part Number: DAC81408

Tool/software:

Hi Team,

We are using DAC81408E in one of our design. The output of DAC, connecting to an Analog Input of Servo Drive, the range of input is +/-10V differential.
Can you please suggest a power device with minimum size.

In my design, currently I have 12V, 5V, 3.3V and 1.8V. So, mainly I need to generate -12V for analog input.
Please suggest a solution for this.

Thanks
Vjohn

2 months ago

0 Sanjay 2 months ago

TI__Intellectual 2750 points

Hi Vjohn,

Please refer to this reference design link "Optimized Power-Supply Circuit Solution for DAC81416 High-Voltage Output" for getting the -12V supply. In the document you can see the Rfb1/Rfb2 is been suggested for -24V, you can choose is appropriately to get the -12V power output.

Thanks,
Sanjay

0 VJohn 2 months ago in reply to Sanjay

Prodigy 65 points

Hi Sanjay,

Thanks for your kind information.

Can you please verify the attached schematic of the respective power design.

0 Sanjay 2 months ago in reply to VJohn

TI__Intellectual 2750 points

Hi Vjohn,

This looks okay. Please go ahead.

Thanks
Sanjay

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DAC81408: POWER SUPPLY DESIGN (VCC & VSS PINS)