Tool/software:
Dear Expert
We have built a POC circuit between DS90UB949 and DS90UB948, and a single circuit is used between DS90UB949 and DS90UB948
Channel COAX connection, 949 motherboard as power supply terminal, PLCK frequency of 25MHz, corresponding link rate of 875Mb Mb/s, line
The maximum current is 800mA. The circuit diagram and POC circuit are attached. We are currently experiencing unstable connection issues
Question, please ask the following questions:
The total inductance of the POC circuit is 3.55uH (5 709nH inductors in series, model Coilcraft)
132-20L）， Is the inductance value of the inductor sufficient?
2. The AC coupling capacitors for Rin+of 948 and DOUT+of 949 are selected as 33nF, while Rin - of 948 and DOUT AC coupling of 949 are used
Is the selection of 15nF capacitor correct?
Does the routing between POC inductor and coaxial line need to meet a 50 ohm impedance?
Can the filtering capacitor in the POC section of terminal 949 and the filtering capacitor in the POC section of terminal 948 be configured the same? Regarding signal transmission
What impact does losing have? See attached file: POC circuit PNG (See attached file: Wiring Frame)
Figure PNG)
