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LMK1D2102: LMK1D2102RGTR

Jorge Grande
Prodigy 10 points
Part Number: LMK1D2102

Tool/software:

Good day. I am designing a main board PCB for a test bench, and I have a question regarding the LMK1D2102RGTR:

Can I control the enable signal from an ADIO PXIe instrument the way I show you in the attached image? I want it to be at GND by default with the pull-down resistor (all outputs disabled) and when I want to enable OUT0 and OUT1 the ADIO will put the signal "DIO_CLK_EN" at 3V3 (high).

Is that correct?

Thank you very much,

Jorge.

  • +1
    TI__Expert 8290 points

    Hi Jorge,

    This should work. If the default state of DIO_CLK_EN is at GND, then the device outputs will be powered down as expected. If it is a Hi-Z state, then the internal biasing of the enable pin will result in the voltage of the pin being held at ~0.03V (the external 4.7-kOhm pulldown resistor and the internal 320-kOhm pulldown resistor paired with the internal 500-kOhm pullup resistor will pull this pin below 0.3*VCC, which will mean is it read as a logic low). 

    Once DIO_CLK_EN is set to 3.3V, the outputs will be enabled. 

    Thanks,

    Michael

  • 0 in reply to Michael Srinivasan
    Prodigy 10 points

    Thank you very much for your support Michael. With people like you we will learn and become experienced professionals much more faster. 

    Have a nice day!