[sdiy] Filter cut off DAC

[Roman Sowa]

I dare to disagree.
Back in the old days, when there was 12 or 16 bit DAC available, it was 
really 12 or 16 bit. I mean INL in range of 1-2LSB was very common, if 
not a rule.
It was hard to get any DAC at all, and they cost $30 to $300 so they 
better be good. Some of them were laser trimmed at wafer level so no 
wonder they were accurate and expensive.
Nowadays everybody makes DACs, because silicon process is well 
established and repeatable, good enough for excellent 8-bit linearity 
without any trimming. There are thousands of DAC, and most have 2-digits 
INL, like 64LSB is not so hard to find.

There are still DACs made today with 1LSB or better INL, but they 
usually cost 2-5 times more than other crappy DACs of the same 
bits-resolution.

All I'm saying old DACs are still better than a lot of new ones, but 
obviously it's easier to get DACs better than ever before if you pay the 
price.

Roman

W dniu 2018-05-22 o 11:01, paula at synth.net pisze:
> Cheater00 makes a good point.
> 
> Brian, would you care to give the INL and DNL figures for the 16bit DAC 
> used in 1981?
> I somehow suspect that these days a 12bit DAC, even a reasonably priced 
> one, would have a better INL and DNL than the DAC from 1981.
> 
> 
> On 2018-05-22 05:19, cheater00 cheater00 wrote:
>> Unless for the same price you get a really good and stable 12 bit DAC,
>> or a pretty crappy 16 bit DAC.
>>