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DAC8830: Difference Between Buffered output and Unbuffered output

Shinichi Inoue
Guru 19671 points
Part Number: DAC8830
Other Parts Discussed in Thread: DAC80501

Dear Specialists,

My customer is considering DAC8830.

They selected DAC8830 and wanted to introduce other DACs.

We selected DAC80501, then they has a question.  

DAC8830 is unbuffered output and DAC80501 is buffered output.

They'd like to know Pros and Cons between Buffered output and Unbuffered output.

I looked for the document and couldn't find it.

Could you please let me know about the difference. 

I appreciate your great help in advance.

Best regards,

Shinichi

  • 0
    TI__Mastermind 18546 points

    Hi,

    Generally speaking, it depends on the application in which you are intended to use the DAC.

    For example, in a buffered DAC, settling time will be higher because the buffer used internally to the DAC will have finite bandwidth ( in the order of few MHz at max). But for an unbuffered DAC, you can get very low settling time, since the buffer choice is completely depends on the end user. Customers can use high bandwidth amplifier and get very low settling time. This is useful in waveform generation applications.

    If your application is just setting some voltage or current, I would choose a cost optimized buffered DAC's.

    Another important aspect is noise, since the buffered DAC's have noise higher than their unbuffered counterpart since buffer is not integrated. Customers can choose external low noise amplifier and optimize their systems better.

    Hope you got an idea about buffered and unbuffered DAC's.

    Regards,

    AK

  • 0 in reply to Akhilesh K
    Guru 19671 points

    Hi AK,

    Thank you for your reply and advice.

    I'll share your information with the customer.

    If the customer has an additional question, I consult you agatin.

    I appreciate your great help and cooperation.

    Best regards,

    Shinichi