Brian Padalino wrote:
With trying to keep costs down, using the same AFE as the USRP seems like it isn't that good of an idea mainly due to the fact that it is built on old technology and costs so much.MAXIM makes a nice full duplex AFE that has a couple of slow-speed ADC and DACs as well for VCTCXO's, AGC, etc. It can be found here: http://www.maxim-ic.com/quick_view2.cfm/qv_pk/5163 10-bit resolution for the ADCs and DACs, and only a 45MSPS part, but for $16 in small quantities (less than $10 in higher) it should still be enough for plenty of bandwidth.
I was just going over the DBSRX schematic and realized there are a couple of "slow" ADC's and DAC's on the Analog devices part. I'm pretty sure the DAC's are used to control the AGC stages in the RFX series cards.
Philip
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