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DS280DF810: Custom Boost Values

Don Schelle
Expert 4150 points
Part Number: DS280DF810

Hello,

I have an application that would requires more than 9dB of boost, but less than 13dB of boost from the CTLE.    Table 42 in the programming guide gives some insight into the boost ranges in the auto adaptation algorithm:

We are operating the device in manual mode.    From the table the following values yield:

  • 0x00h ~= 9.2dB
  • 0x40h ~= 13.0dB

Given the nature of the 4 stage CTLE, I think that the following bit values are also valid:

  • 0x10h
  • 0x04h
  • 0x01h

What is the corresponding boost for each of these values?

Don

  • 0
    TI__Guru* 93670 points
    Hi Don,

    Here are the gain for the settings you noted:

    0x10h ~- 11.4dB
    0x04h ~= 10.8dB
    0x01h ~=10.4dB

    Please note these gain are for the EQ stages within the device. Therefor we should reduce this by insertion loss of the trace outside the device ( for example from signal source to the input pin of the device).

    Regards,,nasser