|
codingplanet
Mad Scientist
United Kingdom
195 Posts |
 Posted - Aug 13 2011 : 1:04:20 PM
|
Hi jnewman,
Yes, I am using Microchip's software USB stack. Interesting project there. Some similarities to mine.
Johnny, I have since spoken to a senior engineer at work about this (he specializes in instrumentation amps). He told me that the 0 - 3.3V specifies only the magnitude. The voltage can be in either direction. ie. It won't be a problem applying -6mV across the differential inputs. I also discovered by myself that the offset on the Vref pin will be added after the amplification stage.
I have used Altium at work, but only for drawing schematics. I found it intensely annoying. |
 |
|
USB contraption
