Re: [Discuss-gnuradio] SSRP website

[David Carr]

Chuck et all,

I chose the LTC1746 for a few reasons.  Firstly, its a 14 bit converter 
(originally I had been looking at 12 bit converters).  It seemed to me 
that if I was going to spend the time to develop a board it might as 
well be as high performance as I could reasonably make it.  14 bits 
seems to be about the highest you can go and still maintain tv-like 
bandwidth.  Maxim makes some high speed 15 bit converters but they only 
come in a MILF package which has no leads == no fun for hand assembly.  
I then stumbled across the '1746 while working on another project at 
work.  The '1746 comes in a SSOP package which is doable, has 14 bits of 
precision, decent sample rate and it seems to be designed so that I 
don't need THAT much extra stuff to use it.  That and the Linear rep 
gave me 6 of them for free to play with.  Fortunately, the design for 
the '1746 board will be fairly converter agnostic, so a little 
re-routing and quite a few devices should drop into the same basic 
layout.  Lastly, the SSRP is designed to be very modular so that nobody 
has to use a '1746 based board... and I've been looking awfully hard at 
Analog's 16/18bit 3Msps converter for another board down the road. 

Thanks for your interest,
-DC