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The AUX out  of  ADF5901 and ADF4159

Question asked by Bebetter on May 9, 2017
Latest reply on May 10, 2017 by Bebetter



When I use the ADF5901 with ADF4159, I have some questions about how to connect the AUX/AUXB of ADF5901 to the RFINA/RFINB of ADF4159


a:  The output impedance of AUX/AUXB is 200 ohm (Page 4 in ADF5901 datasheet)but the input impedance of RFINA/RFINB look like High-Z

   (figure 19 in page12 in ADF4159 datasheet) and it has a 1.6V dc bias. So Can I connect them directly?


bIf I can connect the AUX/AUXB directly to RFINA/RFINB just like the demo board schematic of ADI, and how many impedance of the differential line(AUX/AUXB to RFINA/RFINB)?

200ohm? Or 100 ohm?


C:   Can you give me some parameters of Demo board of EV-RADAR-MMIC2?

The board type(R4350 or R4003 or others)

The reference layer thickness (10mil or 20mil or others)

The copper thickness at top layer(1oz or 0.5oz)

The differential line width and spacing( between the AUX/AUXB with RFINA/RFINB)


Look forward for your reply.