[Icc-avr] Qry :AVR AVREF Value?

[AMS Solutions - GJ Laubscher]

Hi All,
Using a mega8 with the ADC enabled selecting AVREF= internal 2.56vdc -
 Sampling rate at 125k, which is within the 20-200khz as per atmel

-circuit -k

  Vcc=5v
    connected to
  AVCC via 10uH, 
      connected with a 100nF cap to GND (as per recomm atmel)
&
   external cap 100nF poly connected to Pin21 (AVREF) 

I meassure 2.605Vdc on AVREF.

   I expected to read 2.56Vdc......
.........Using  recently calibrated Fluke 77

I wonder whether this V-value on AVREF is in fact correct or should it have been 2.56V?
 Maybe FLuke out on low V?

hmmm...  maybe one of you guys have had the same experience or can point me to more reading/appl 
material.

I really appreciate your feedback!

Regards,
Gerhard Laubscher            
TeleFax : +27-21-557 0160    Mobile : 082 366 1950
email : amsol at amssolutions.co.za   website: http://www.amssolutions.co.za
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