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SN65DP141: amplify the input signal's amplitude

Ken Zhang
Expert 3595 points
Part Number: SN65DP141

Tool/software:

Hi,

A account has below questions about SN65DP141, would you like kindly help to support them?

  1. Can the amplitude of the output signal at the OUTX port of SN65DP141 amplify the amplitude of the input signal, i.e. let VOUT_AMP=Gain*Vin_amp?
  2. For the same input signal (same Vin_amp), how should the SN65DP141 be configured in order to achieve maximum vout_amp amplitude? If the EQ_DC_GAIN=0DB, EQ_AC_GAIN=15DB, TX_DC_GAIN=6DB, the maximum VOUT_AMP output amplitude can be made (regardless of the output amplitude being limited by the IC), Right?

amplitude.pptx

  • 0
    TI__Mastermind 40110 points
    Ken Zhang said:
    Can the amplitude of the output signal at the OUTX port of SN65DP141 amplify the amplitude of the input signal, i.e. let VOUT_AMP=Gain*Vin_amp?

    This is theoretically possible, but the SN65DP141 and other linear redrivers are used to compensate for insertion loss of cables and interfaces rather than boost the signal. 

    Please have a look at the following app note: https://www.ti.com/lit/an/slla338/slla338.pdf?ts=1726684901168&ref_url=https%253A%252F%252Fwww.google.com%252F

    Ken Zhang said:
    For the same input signal (same Vin_amp), how should the SN65DP141 be configured in order to achieve maximum vout_amp amplitude? If the EQ_DC_GAIN=0DB, EQ_AC_GAIN=15DB, TX_DC_GAIN=6DB, the maximum VOUT_AMP output amplitude can be made (regardless of the output amplitude being limited by the IC), Right?

    The goal should be to compensate for the loss profile of the connectors, traces, and cables used. If you increase the EQ to the maximum this will result in the distortion of the signal rather than an increase in the swing. Please have a look at the following table for reference: