whenever we use internal reference voltage of 2.56V in AVR (specifically mega8), does it depend on supply voltage? No probs for 5V Vcc but I want to run m8 on 3.7V & I am unsure if it would work. Datasheet just says:
The internal 2.56V reference is generated from the internal bandgap reference (VBG) through an internal amplifier.
Internal Voltage Reference is specified as (2.3, 2.56, 2.7) V (min,typ,max) but 2.3V under what Vref??
Above what threshold should I maintain Vcc so that Internal 2.56V is accurate?
I want my battery operated voltmeter to report accurate ADC conversions regardless of the dip in battery voltage. :roll: