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Andy Neil
11/17/11 15:28
Read: 411 times

#184792 - No, that is not a requirement!
Responding to: Zeeshan Ashraf's previous message
Zeeshan Ashraf said:
What it mean is that i need (sic?)to use a 12-bit DAC

No, that is not your requirement - that is your current proposal to meet some requirement!

As an illustration, see this blog post by Dave Van Ess:

Dave Van Ess said:
When I am out showing off [my product] I will have customers draw out a schematic and ask if [my product] can do that. A schematic is a solution, not a definition. I end up asking just what are they trying to do. When they tell us We then figure out how to do it the [my product] way.

See: - last paragraph

Specifying numbers of bits here is, effectively, sketching a schematic - not defining the problem.

So, again, what is your actual requirement?

ie, what specific performance criteria does your system need to meet?

Or, to put it another way, why do you think you "need" (sic?)to use a 12-bit DAC?
Why, for example, could you not use an 8-bit DAC...?

List of 20 messages in thread
Multiple Analog Outputs.      Zeeshan Ashraf      11/17/11 08:14      
   Don't dismiss single DACs      Oliver Sedlacek      11/17/11 08:47      
   Resolution/precision      Per Westermark      11/17/11 09:03      
      RE: #184777 - Resolution/precision      Zeeshan Ashraf      11/17/11 10:49      
         But is 4k steps needed when you have play?        Per Westermark      11/17/11 11:22      
   not for commercial use      Erik Malund      11/17/11 09:57      
      RE: #184778 - not for commercial u      Zeeshan Ashraf      11/17/11 10:44      
         how else would you ...      Erik Malund      11/17/11 11:14      
            RE: #184782 - how else would you ...      Zeeshan Ashraf      11/17/11 11:25      
         Same-same      Per Westermark      11/17/11 11:27      
            RE: #184785 - Same-same      Zeeshan Ashraf      11/17/11 11:32      
               why do you think I said "high input impedance"?      Erik Malund      11/17/11 11:46      
      Similar stuff !      Zeeshan Ashraf      11/17/11 11:59      
   State the actual requirement!      Andy Neil      11/17/11 12:26      
      RE:#184789 - State the actual requirement!      Zeeshan Ashraf      11/17/11 14:16      
         Still no answer to "need"      Per Westermark      11/17/11 14:22      
         No, that is not a requirement!      Andy Neil      11/17/11 15:28      
            Very interesting how this always comes up      Justin Fontes      11/18/11 10:31      
            RE: #184792 - No, that is not a requirement!      Zeeshan Ashraf      11/19/11 16:48      
               Yes, bits matter      Per Westermark      11/19/11 17:03      

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