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Part Number: TRF372017EVM
I have two questions regarding TRF372017EVM datasheet page 6 ( http://www.ti.com/lit/ug/slwu068a/slwu068a.pdf)
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In reply to RJ Hopper:
In reply to Mahir Arpadan:
Do you mind if I see the questions?
I apologize for my tongue-n-cheek responses...I was having a bit of fun since I did not see the questions in the original post. --RJH
No problem. Somehow two questions seem to disappear from my post, I noticed that, and I wondered how you had the answers ;)
Q1: Why are R2,R3,R10,R11 resistor values are 1uf(???) and SMA J3,J4,J9,J10 inputs are terminated with 0.1uF(C31,C32,C8,C9) caps(though they are DNI).
Q2.1: We would like to drive TRF372017 with a single-ended Quadrature only signal(from a 50 Ohm Arb. Wave. generator). How should i terminate Eval board.
Q2.2:In the final design we will drive TRF372017 single-endedly and quadrature only with AC coupled FMC144(DAC has 20mA full-scale current source in figure-9) module . Any suggestions terminating TRF372017 for this drive.
Thanks in advance
Somehow I'm having problems with non existing questions and this time figure lol.
Thank you for your detailed answers. Now I have a better understanding of this device.
For Q2.2 we will use 4DSP UM047 - FMC144 Module. The device is AC coupled(not DC coupled with DAC38J84) with 4:1 transforemer single-ended outputs. We plan to use DC blocking caps with internal Vcm generation.
As in your suggestion to use diffferential drive signals, we are evaluating a solution with another 1:4 center tapped transformer to transform single-ended signal to balanced differential signals. Hopfully this will work.
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