or maybe laser trimming those resistors is now cheaper??
New discrete R2R Multibit 2 box from CEC
Using discrete R2R Ladder Multibit (from MSB), looks like they now know not to go bitstream (Delta Sigma) for the best d to a conversion.
As their previous model/s I believe they tried the far cheaper Delta Sigma route.
http://www.cec-international.com/
http://www.cec-international.com/images/fulls/06.jpg
Cheers George
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Side note, their web site is horrible. And I mean absolutely horrendous. And I do draw an inference to the product from a web site. And I'm not just speaking of the main link to their home page, I'm speaking of the product page itself http://www.cec-international.com/pages/s25.html |
Some nice reviews, for your reading pleasure. And the website doesn't worry me, you should see mine. http://www.cec-international.com/CEC-The%20Drive/PAGES/s22.html Cheers George |
In the earlier ones they used the now discontinued R2R ladder multibit Burr Brown PCM-1702’s and 1704’s, but as we know Burr Brown because of the high cost of manufacturing these Burr Brown stopped producing them. Like others CEC then went to the dark side and used far cheaper ESS Sabre (delta sigma, 1 bit, bitstream ) type chips. But it now looks like they and many other smart ones are having second thoughts and are going back to R2R ladder multibit again, but discrete this time from MSB, because there are no packaged versions R2R ladder from major dac chip manufacturers anymore. I don’t blame them as to me nothing can compare to well implemented R2R ladder Multibit dacs, especially not delta sigma based ones. Cheers George |
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