[sdiy] Arpeggiator1 / Arduino UNO

[Nantonos]

Hello Rick,

Friday, April 10, 2015, 10:26:36 AM, you wrote:


> No idea, and I don't care :-) All I want is 12 discrete voltages per octave.

You mean that they are going into a quantizer, so you don't care about
accuracy as long as they are distinct?

> As far as I can tell, without actually measuring, the voltages are
> reached quick enough, and are repeatable.

Filtered PWM is a trade off between lots of ripple (but fast) and
little ripple (but slow and slewing). Without either a measured result
or a theoretical analysis of errors, the actual response is just
guesswork.


> On 10/04/2015 10:08, Roman Sowa wrote:
>> How does your 8+8 bit PWM DAC perform in terms of DNL at the MSB
>> boundary? I mean when for example it goes from 40FFh to 4100h, as well
>> 4000h to 3FFF.

I would be surprised if the ENOB is even as high as 12; probably more
like 10. Which is fine if it suits the purpose, but describing this as
"16 bit" is misleading for anyone else thinking of building it.


-- 
Best regards,
 Nantonos                            mailto:nantonos at epona.net