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EQ0,EQ1 specification

user6366701
Prodigy 20 points
Part Number: DS25BR110
Other Parts Discussed in Thread: DS25BR150

Hi,

I have a question in the EQ0,1 specification.

1. Please let me know what the EQ function does.

   Is it a function that makes it possible to receive signals of smaller amplitude by amplifying the input amplitude?

2. Is the following figure correct?
 If a + -50 mV amplitude signal is received, the DS25BR110 can use the EQ function to amplify the amplitude and meet the specifications. DS25BR150 does not meet specifications.

3. Is it possible to connect DS25BR110 in series with a cable in between as shown below?

LVDS signal

 sensor ->cable -> DS25BR110 (without termination resister) -> cable ->DS25BR110 (without termination resister) -> other IC

Regards,
Sakai

  • 0
    TI__Mastermind 43795 points

    Hi Sakai,

    1. What does the EQ function do.

    (Answer):  The EQ function is designed to amplify only the high frequency components of a signal.  This is exactly the opposite of cables or PCB transmission lines which attenuate the high frequencies and pass the low frequencies.  There are many examples of EQ gain curves in Texas Instruments datasheets. 

    Here is a link to one of them (see page 10):  www.ti.com/.../ds160pr410.pdf

    2. If a + -50 mV amplitude signal is received, the DS25BR110 can use the EQ function to amplify the amplitude and meet the specifications. DS25BR150 does not meet specifications.

    (Answer):  If the maximum peak to peak input amplitude of the input signal is only 50mV, the signal is too small. 

    3. Is it possible to connect DS25BR110 in series with a cable in between as shown below?

    LVDS signal sensor ->cable -> DS25BR110 (without termination resister) -> cable ->DS25BR110 (without termination resister) -> other IC

    (Answer):  It is possible to connect two DS25BR110 devices in series at both ends of a cable.  However, we recommend and it is preferred to only have the DS25BR110 at the receiving end.

    Regards,

    Lee