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???
01/25/08 11:20
Modified:
  01/25/08 11:20

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#149943 - More details + missing detail from datasheet
Responding to: ???'s previous message
Oliver Sedlacek said:
If you can tell me the following, I can recommend something:
Supply voltage
Closed loop gain
Bandwidth
How close to the negative rail does the input go
How close to the positive rail does the input go
Bias current
Offset voltage
Offset voltage drift


Kai Klaas said:
...if an application demands input bias currents of less than 1pA. Usually you will need some protection schemes, which can heavily increase these currents. Also, if not the purest materials are used leakage across the board will be decades higher. You often can measure the moisture with such a board: The more moisture, the higher the surface leakage currents...
Ap, would you like to tell us what you want to build?
Kai


I am trying to figure out how to condition this
http://www.ist-ag.com/english/p...14smd.html

I dont get why the datasheet for TLC271 doesnt mention (Input impedance in differential / and common mode) for TLC271 , it says direct :

" High Input Impedance...10 raised to the power 12 Ohm.

http://focus.ti.com/docs/prod...lc271.html

AP





List of 26 messages in thread
TopicAuthorDate
Opamp datasheet Question            01/01/70 00:00      
   page 3            01/01/70 00:00      
      TLC 271            01/01/70 00:00      
   Use input bias current            01/01/70 00:00      
      Use input bias current            01/01/70 00:00      
         ?what application            01/01/70 00:00      
         More info?            01/01/70 00:00      
         so, you have left the "low cost" area            01/01/70 00:00      
         opa129            01/01/70 00:00      
         I find it always a bit funny...            01/01/70 00:00      
            It's like those high-res PC sound cards ...            01/01/70 00:00      
            More details + missing detail from datasheet            01/01/70 00:00      
               Frequency control in oscillator            01/01/70 00:00      
                  relaxation oscillator            01/01/70 00:00      
                     Ssshh..            01/01/70 00:00      
                        Ssshh..            01/01/70 00:00      
                           Ap you are at it again - not a flame            01/01/70 00:00      
                              progressive evolution            01/01/70 00:00      
               have you had a look at            01/01/70 00:00      
                  sensirion.com            01/01/70 00:00      
               Link and answer            01/01/70 00:00      
                  www.hygrosens.de            01/01/70 00:00      
                     It's a double CMOS555, e.g.TLC556            01/01/70 00:00      
   Another sensor and schematic using 555            01/01/70 00:00      
      Another sensor and schematic using 555            01/01/70 00:00      
         Price            01/01/70 00:00      

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