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DS90UB954-Q1: DS90UB933-Q1 + DS90UB954-Q1 Frequency Domain insertion loss/ return loss

Part Number: DS90UB954-Q1

Dear Sir,

We need your assistance to clarify about frequency domain insertion loss/ return loss.

Our application is 933+ 954 , we want to confirm the insertion loss and  return loss specification  of the FPD-LINK .

1.We check the table 227 of DS90UB954-Q1 specification ,  it defined value of RL & IL. That is only for UB954 or can be the standard specification for all serializer & deserializer ?

2. Table 227 of DS90UB954-Q1 specification seems just defined for PCB trace only.

We want to know the insertion loss limit value (max) from  DS90UB933 to DS90UB954  ( including TX PCB trace loss + connector loss+cable loss + connector loss + RX PCB trace loss)

In other words, about insertion we want to know the accepted decade value (max) from  TX (PCB trace) -->connector -->cable--> connector--> (PCB trace) RX

3. We want to the know the return loss limit value of TX (DS90UB933). 

4. If we need to inquiry the channel-Requirements-ADAS chipsets Limit line if TX+ RX are other different collocation.

Thank you.

  • Hello Daniel,

    1- You can use the listed IL and RL for both boards, SER and DES.

    2- The Total Transmission-Channel specs are as following:

     

    Frequency

    Limit

    Return loss, S11

      1 to 100 MHz

     -16dB

     

     0.1 to 1 GHz

    -9 + 7*log(f) dB

     

    1 to 2.1 GHz

    -9dB

     

     

     

    Insertion Loss, S21

    1MHz         

    -1.4dB

     

    5MHz

    -2.3dB

     

    10MHz

    -2.5dB

     

    50MHz         

    -3.5dB

     

    100MHz

    -4.5dB

     

    500 MHz

    -9.5dB

     

    1.0 GHz

    -14.0dB

     

    2.1 GHz

    -21.6dB

    3- As said above, you can use the same specs from the 954 or 934 datasheet.