DP83822IF: looking for the equivalent circuit of the FX_TD and FX_RD

Sam Yang1

Prodigy 30 points

Part Number: DP83822IF

Hi,

Is it possible to provide the details of FX_TDP/M and FX_RDP/M? Like a interface equivalent circuit?

Is it like a common ADC and DAC interface?

It will be very helpful to design the connection to different fiber transceiver.

Best wishes,

Sam

over 5 years ago

0 Cecilia Reyes over 5 years ago

TI__Genius 9920 points

Hi Sam,

Our functional block diagram in the datasheet may help you with the internal circuitry at a high level.

Let me know if that clarifies it for you.

Thanks,

Cecilia

0 Sam Yang1 over 5 years ago in reply to Cecilia Reyes

Prodigy 30 points

Hi Cecelia,

The function block diagram is very helpful for understanding.

But for circuit design it is necessary to know the input/output impedance, voltage bias and level range, etc..

The fiber transceiver in our design is CML interface. Is it Ok if we use the connections in the diagram of your datasheets?

Thanks for your help.

Sam

0 Cecilia Reyes over 5 years ago in reply to Sam Yang1

TI__Genius 9920 points

Hi Sam,

Let me confirm if you can use the same specifications for fiber transceiver.

I can provide my feedback by EOD tuesday.

Thanks,

Cecilia

0 Cecilia Reyes over 5 years ago in reply to Cecilia Reyes

TI__Genius 9920 points

Hi Sam,

For circuit design you may refer to our fiber network. In fiber mode only capacitive coupling and pull up resistors are necessary for connection between the Fiber inputs of the PHY to the transceiver.

Thanks,

Cecilia

0 Sam Yang1 over 5 years ago in reply to Cecilia Reyes

Prodigy 30 points

Hi Cecilia,

We will build a test board to confirm soon.

Thanks for your reply.

Sam

0 Cecilia Reyes over 5 years ago in reply to Sam Yang1

TI__Genius 9920 points

Thank you for the update Sam please let us know the results once you test.

Thanks,

Cecilia

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DP83822IF: looking for the equivalent circuit of the FX_TD and FX_RD