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ADS52J90: ADS52J90 ADC clock source

prateek hegde
Intellectual 380 points

Part Number: ADS52J90

HI,

 I am using ADS52J90 ADC. I have an OCXO which gives 60 MHz sine wave. 

i want to derive a square wave required for ADC clock from OCXO output

can anyone please suggest how to do this??

Thank you

  • 0
    TI__Genius 12025 points
    Hi Prateek,
    How are you?
    Thanks for using TI ADS52J90 device.
    We will look into your question and will reply to you soon.

    Thank you again!
    Have a nice day!

    Best regards,
    Chen
  • 0
    TI__Genius 12025 points

    Hi Prateek,

    How are you?

    Thanks for using TI ADS52J90 device.

    Please take a look at the ADS52J90 User's Guide

    inside coming with ADS52J90 schematics with it.

    There is one option with using external single clock input

    and connecting to a transformer to convert it into differential outputs

    to ADS52J90's clock input pins (CLKP and CLKM):

    Please take a look:

    Note: J55 connector (ADC_CLK) is connected to your OCXO output pin

    and ADC_CLKP_TXFMR is connected to ADS52J90's CLKP pin

    and ADC_CLKM_TXFMR is connected to ADS52J90's CLKM pin.

    Thank you for using ADS52J90 device!

    Best regards,

    Chen

  • 0 in reply to Chen Kung
    TI__Genius 12025 points
    Hi Prateek,
    How are you?
    Also ADS52J90 ADC input clock does not require its input to be square waves.
    We usually run its input clock using sine waves.
    Thank you for using ADS52J90 device.
    Have a nice day!

    Best regards,
    Chen
  • 0 in reply to Chen Kung
    Intellectual 380 points
    hi chen,
    can u please specify the current consumed by each voltage rails i.e AVDD_1.8 ,DVDD_1.8,DVDD_1.2
    so that i can calculate the power budget. and select the required DC to DC convereters.
    Thanks
  • 0 in reply to prateek hegde
    TI__Genius 12025 points

    Hi Prateek,

    How are you?

    According to the ADS52J90 data sheet of the power consumption estimation:

    When using LVDS mode:

    When using JESD mode:

    Please take a look.

    Thank you for using ADS52J90 device.

    Best regards,

    Chen