I want the DAC39J84 output converted to single ended SMA connector.
On the datasheet sec 7.3.28 and 7.3.29, it give two simple circuit for the DAC output single ended.
But on the evaluation board, it is using a 75 ohm balun (JTX-2-10TA+) followed by another Transmission line transformer (MABA-007159-000000).
1. Why use a 75 ohm balun in the evm board?
2. What are the benefit for the evaluation board configuration? Is the 2nd transformer mainly for balance the differential output using two SMAs? While I am only using single ended (1 SMA), I should not need that?
3. How would it compare with using the TCM-2-33WX (https://www.minicircuits.com/pdfs/TCM2-33WX+.pdf) reversely?
4. How about use a TCM4-19+ to convert the differential to single ended?
I am confused by all these different options and failed to analysis the pro and con for each of them.