So recently I am experimenting with AVR's ADC, I found that I am not happy with the ADC reading, I mean the ADC reading is not bad, but I just want it better.
it makes me thinking: how good is a 10bit ADC in 8bit AVR compares to other general stand alone ADC?
is it about the same? better? worse?
I know it's hard to compare without given a specific chip. but I have no experience with other ADC chip either.
Hope I am not asking too much.
how good is a 10bit ADC in 8bit AVR compares to other general stand alone ADC?
I am not happy with the ADC reading, I mean the ADC reading is not bad, but I just want it better.
Hope I am not asking too much.
The main thing I am looking for is accurately :)
The main thing I am looking for is accurately
And then, it is not going to be the fault of the AVR's ADC. You can achieve near-10-bit results if:
-- The analog subsystem is squeaky-clean. No ripple or drift anywhere.
-- That is difficult in the real world, so oversampling and averaging will help.
-- Conversions must be made within specs. In particular, the signal must have enough drive, and the ADC clock must be slow enough.
So, answer the questions first, tell your setup, show some code, and the results.
A very similar discussion here:
https://www.avrfreaks.net/index.p...
If 10 bits isnt good enough, get a 12 or 14 or 16 bit a/d converter and read it from the spi.
More information is needed, for sure. In addition to what has already been said,
What does he mean when he says "accuracy" ?
How did he determine that the AVR ADC is not "accurate" ?
Does he have proper decoupling caps ?
What voltage reference does he use ?
What does his code look like ?
