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LMK1D1204: IC CLK BUFFER 2:4 2GHZ

Pawan G
Prodigy 30 points
Part Number: LMK1D1204
Other Parts Discussed in Thread: LMX1205, LMK1C1102

Tool/software:

Hi

I am using LMK1D1204RGTR in one of the project, but it doesn't accept Analog signal or RF signal as input. 

Can you suggest other alternate part which accepts both Analog and RF signal as input (single end).

Regards

  • 0
    TI__Expert 8830 points

    Hi Pawan,

    If you are looking for an RF buffer, the recommended part would be the LMX1205.

    Thanks,

    Michael

  • 0 in reply to Michael Srinivasan
    Prodigy 30 points

    Hi Michael,

    I am using 160MHz Sine wave from external source, so i wanted to convert that 160MHz into differential signal and fed to my FPGA.

    Can you suggest any part?

    Thanks,

    Pawan 

  • 0 in reply to Pawan G
    TI__Expert 8830 points

    Hi Pawan,

    If you are converting the 160 MHz sine wave signal into a differential signal, the LMK1D should be capable (the slew rate should be high enough to drive the LMK1D). The performance of the device is highly dependent upon the input slew rate - if you want better performance, consider passing the 160 MHz sine wave through an LMK1C1102. It will square up the wave and you will have the output you desire.

    Thanks,

    Michael

  • 0 in reply to Michael Srinivasan
    Prodigy 30 points

    Hi Michael,

    I am using TLV3604DCKR, in the circuit now. Below is the circuit, input is 160MHz analog sine wave and output 160MHz differential signal.

    Can i give AC coupled input, please verify the circuit, AC coupling not mentioned in the datasheet.

    Thanks,

    Pawan

  • 0 in reply to Pawan G
    TI__Mastermind 29152 points

    Hi Pawan, 
    In theory yes, the LMK1D device allows for AC coupled input given we have a VAC_ref pin which can be used to set the common mode of this pins. 

    This eliminates the need for having a different supply for the termination pull up to VTT. 

    You cannot directly AC couple the input to the device though as there is no internal bias. 

    Technically you can directly input a SE signal to LMK1D and bias the unused input to VDD/2. 



    Best regards, 

    Vicente