---------------------------------------------------------- XDP4000X-List Digest Archive --- Total Messages Posted Wed 02/18/04: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:57 AM - Re: XDP-4000x Toslink Input... (Brody Z) ________________________________ Message 1 _____________________________________ Time: 08:57:41 AM PST US From: "Brody Z" Subject: RE: XDP4000X-List: XDP-4000x Toslink Input... --> XDP4000X-List message posted by: "Brody Z" Yes, the CS4390 was a replacement for the CS4329. We don't know when the switch was made. ----Original Message Follows---- From: "Roland M" Subject: RE: XDP4000X-List: XDP-4000x Toslink Input... --> XDP4000X-List message posted by: "Roland M" >--> XDP4000X-List message posted by: "Brody Z" > > >2. DACs : 1998, crystal CS4329. Upgraded in 1999 to CS4390. >Oversampled, delta-sigma type converters. > >-Brody Zitterkopf > > Brody, nice research/discovery and explanation of those circuits! :) However I have one quick question regarging your "#2" (quoted above). When you say in 1998 they were using [Crystal Semiconductor] CS4329s and in 1999 they were using CS4390s, do you mean that the "1st Gen" XDP-4000X units used CS4329 D/As and then they changed them to CS4390s in the latter "2nd Gen?" units? I was just a little confused about that and how you have the dates and different D/As listed. Did you mean they used different D/As depending on the manufacture date/series of the 4000X or are you referring to two different products? (Was the CS4390 simply Crystal Semiconductor's replacement chip for a discontinued CS4329?) Roland M. Dream of owning a home? Find out how in the First-time Home Buying Guide.