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DS90UB940N-Q1: DS90UB940N-Q1with Single channel LVDS input

Richard Yang1
Intellectual 1220 points
Part Number: DS90UB940N-Q1

Hi Team:


 This is a circuit used in the PAD devices, customer side just use a single channel LVDS from car's processor as the input of  DS90UB940N-Q1, the

deserializer's CSI output is with equipped by a MIPI switcher, can you help me to make a check for the circuit to see if this kind of connection is OK? thanks!

LVDS Single-end input.pdf
 

  • 0
    TI__Guru** 108360 points

    Hello Richard,

    I will review and provide my feeedback before the end of Next week.

  • 0 in reply to Hamzeh Jaradat
    TI__Guru** 108360 points

    Hello Richard,

    here is my review Feedback:

    - It looks like you are using Single-ended trace for using Coax cable! Please replace C1818 with a ~50nF instead of 100nF.
    - I can't see how I2C pins are connected! Please make sure to use a 2.2KΩ to 4.7KΩ pullup to 1.8V or 3.3V.
    - For all GPIO pins, as per d/s recommendation, If unused, tie to an external pulldown.
    - MODE_SEL1 is indicating Input Mode for STP but you are using Coax!!
    - BISTEN If unused, tie to an external pulldown.
    - BISTC If unused, tie to an external pulldown.
    - on All VDDxx pins, please make sure to use a 10nF to 100nF capacitor directly on each pin.
    - On VDDxx pins, please make sure you use FB as per d/s recommendation in figure 39.
    FB1-FB4: Z=120 ohm @ 100MHz
    FB5 and FB6: DCR<0.3 ohm; Z=1Kohm @ 100MHz