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DS25BR150: open LVDS input

robert_2100
Prodigy 30 points
Part Number: DS25BR150

Hi

do i need some external pull up/down resistors if i have no driving output connected to the ds25br150 input?

thanks for your answers

br

  • 0
    TI__Mastermind 29635 points

    Hi Robert,

    The DS25BR150 does not have an internal mechanism to shut off the output when no signal is present on the input. The LVDS circuitry is relatively high gain so even the 30mV of noise will translate into relatively full swing output oscillations.  We recommend using a fail-safe bias in case there is no input provided to the DS25BR150 while the device is on. A fail-safe circuit looks similar to below:

    You can also find more information about Fail Safe Biasing in AN-1194: www.ti.com/.../snla051b.pdf

    Thanks,

    Michael