• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 46 subscribers
  • Views 1105 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DAC80501: Schematic review for 10V analog output

Tony Steinbock
Prodigy 180 points
Part Number: DAC80501

Hello TI-Team,

in an industrial application we need an 0..10 volt analog output. We designed the following schematic using the DAC80501. Could you please review the implementation of the cuicuit? Basically, the circuit was implemented close to the data sheet. The internal 2,5V reference voltage is used to generate an output voltage from the DAC in the range of 0..2,5V. Behind the DAC sacales an Opamp up to 10V. The following questions i have in addition:

- Is the bypass cap value C199 for the internal reference voltage okay?

- Is a bypass cap needed on V_out of the DAC?

- In general: is the application implementation correct? Is the circuit approach correct?

Thank you for your help.

  • 0
    TI__Mastermind 33888 points

    Hi Tony,

    One thing I notice is that you are setting REF-DIV to 0. The reference buffer needs sufficient headroom or else it will shut down. The 2.5V internal reference is right at the edge of the spec for a 5V supply. You may see issues there. I would set REF-DIV to 1 and BUFF-GAIN to 1 (gain of 2) to get your 2.5V output. 

    C199 is ok we recommend a minimum of 150nF in the datasheet. There is no need to add a bypass capacitor to the output. The rest of the circuit implementation looks ok to me. 

    Best,

    Katlynne Jones