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If I had say a 100MHz DAC I can't just change the output from 0V to max V in 10ns, at least I think I remember you can't do that in real life. How do you understand what you can do from a datasheet? I feel like I remember reading about this once but I don't remember what it's called. I assume it's load dependent as well and I'm thinking of this in the context of having a 50 Ohm piece of coax connected to the output both source and end terminated.

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  • \$\begingroup\$ A 100MHz DAc could also mean a serial DAC with 100MHz clock speed so name devices and allow folk to help. \$\endgroup\$ – Andy aka Oct 15 '15 at 22:43
  • \$\begingroup\$ I don't have one in mind I thought this was a common limitation of all DAC, basically how far can you switch in a clock cycle. \$\endgroup\$ – confused Oct 15 '15 at 22:52
  • \$\begingroup\$ What do you specifically mean by "a 100MHz DAC"? \$\endgroup\$ – Andy aka Oct 15 '15 at 22:53
  • \$\begingroup\$ A DAC who's input sample clock is running at 100MHz, how about this for an example it's close to what I was thinking of. analog.com/media/en/technical-documentation/data-sheets/… \$\endgroup\$ – confused Oct 15 '15 at 22:56
  • \$\begingroup\$ Output settling time to 0.1% is 35ns for that DAC, Is that the data you are generically looking for? Output rise time (10% to 90%) is 2.5 ns. \$\endgroup\$ – Andy aka Oct 15 '15 at 23:02
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The word your looking for is slew rate. That is how fast you can change from one voltage to another. It is usually measured I'm V/ns. The DAC should have this is the data sheet.

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  • 2
    \$\begingroup\$ I think you mean "Slew" rate. \$\endgroup\$ – Kevin White Oct 16 '15 at 2:26

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