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???
04/10/11 16:07
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 		 #181802 - Also question if 8.5V is guaranteed lowest input.
Responding to: ???'s previous message
Mehdi said:
Per Westermark said:

If you start by subtracting 8.4V, you would have a signal between 0.1 and 0.6V that can then be scaled based on the range of the ADC. The scaling will also scale the DC error from the initial 8.4V subtraction.


8.4 V, For output swing of opamp?

For maximum precision, I would prefer an OP-amp with negative supply before having a rail-to-rail OP-amp. 0.1V gives some margin and also gives margin in case your estimated minimum of 8.5V isn't true.

List of 42 messages in thread
TopicAuthorDate
Signal Conditioning!            01/01/70 00:00      
   AC-coupling don't work to 0Hz and kills DC info            01/01/70 00:00      
      subtracting 8.4V            01/01/70 00:00      
         Also question if 8.5V is guaranteed lowest input.            01/01/70 00:00      
            Is Instrumentation Amplifier is good choise?            01/01/70 00:00      
               Instrumentation Amplifier or op-amp            01/01/70 00:00      
                  Thanks Erik            01/01/70 00:00      
   A scheme using the OP-27...            01/01/70 00:00      
      Kai,You are always Positive!            01/01/70 00:00      
      Another scheme...            01/01/70 00:00      
         Take care with OPA2743...            01/01/70 00:00      
            Thanks Again Kai            01/01/70 00:00      
         -5 Volt Supply            01/01/70 00:00      
            Again            01/01/70 00:00      
               Wrong            01/01/70 00:00      
                  No,only 2 questions!            01/01/70 00:00      
                     Two answers...            01/01/70 00:00      
                        Thank you very much dear Kai            01/01/70 00:00      
         a question?            01/01/70 00:00      
      Please Tell Me your Comments!            01/01/70 00:00      
         ?            01/01/70 00:00      
            Yes,kai            01/01/70 00:00      
               Differential signaling            01/01/70 00:00      
                  Some Questions!            01/01/70 00:00      
                     Precision            01/01/70 00:00      
                        Thanks Per,            01/01/70 00:00      
                     Some answers...            01/01/70 00:00      
                        factor of 4            01/01/70 00:00      
                           Don't forget the subtracting scheme!            01/01/70 00:00      
                        kindness            01/01/70 00:00      
                        Deduction!            01/01/70 00:00      
                           Correct            01/01/70 00:00      
                        nature of signal!            01/01/70 00:00      
                           I'm sorry?            01/01/70 00:00      
                              A bit more            01/01/70 00:00      
                                 This is your signal?            01/01/70 00:00      
                                    I have said this in the first post            01/01/70 00:00      
                                       Any link?            01/01/70 00:00      
                                          calibrating,            01/01/70 00:00      
                           Is there a datasheet in english?            01/01/70 00:00      
                              No,i have searched very much            01/01/70 00:00      
            DYNAMIC RESPONSE            01/01/70 00:00      

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