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  • RE: ADS54J42: ADS54J42 SNR?

    Henry, Is this still an issue? If so and it is a custom board, can you send the schematic so we can take a look at it? Regards, Jim

  • ADS54J42: ADS54J42 JESD204B Design?

    TI Thinks Resolved
    Part Number: ADS54J42 DEARS. We are considering developing the ADS54J42. We only use 2-Lines of 4-Lines of JESD204B. How do you design a line that is not used when designing JESD204B? Do you design open or GND? Thank you.

  • ADS54J42: ADS54J42 SPI?

    Part Number: ADS54J42 Dears. We set the SPI timing as a datasheet. How do I know if SPI is working? Is there a register that can be checked? Thank you.

  • RE: ADS54J42: I want ads54j42 lmfs 1241 cfg reg file

    User, LMFS 1241 configuration file for ADS54J42 is attached. Regards, Jim ADS54J42_4x_dec_3Fs_16_1241.cfg

  • ADS54J42: ADS54J42 setup question?

    Part Number: ADS54J42 Dears. We are considering developing the ADS54J42. We are using JESD204B for the first time. We set it as follows. Sampling uses 276.48Mhz Bandwidth is 120M. Serdes uses four lines. LMFS is 4211. No decimation. What is the…
    • Answered

  • ADS54J42: Fs/4, Fs/2 Spurs

    Resolved
    Part Number: ADS54J42 Hello, My customer has a question. [Q] Is there a way to mitigate "Fs/4" spur and "Fs/2" spur ? [My understanding] These are spurs caused by DC offset mismatch, and it is correcting in DC offset correction block, so no…
    • Resolved
    • Answered

  • RE: ADS54J42: CTRL NYQUIST & NYQUIST ZONE setting

    Resolved
    Hi Jim, Thank you for your many supports. I will close this thread. Instead, I would like to continue resolving this issue with an email. I sent you email. Please confirm it. Thanks and Regards, Hiroshi Katsunaga
    • Answered

  • ADS54J42: Balun Transformer for Input

    Resolved
    Part Number: ADS54J42 Hello, My customer has a question about ADS54J42. [Q] You are using ADT1-1WT for input as single-ended to differential in EVM. Also you describe ADT1-1WT as an example for input balun. The characteristic impedance of ADT1…
    • Resolved
    • Answered

  • ADS54J42: NYQUIST ZONE & CTRL NYQUIST Register setting

    Resolved
    Part Number: ADS54J42 Hello, My customer has a question about ADS54J42. [Q1] Please tell me the proper setting for NYQUIST ZONE and CTRL NYQUIST. <Their configuration> * Input Frequency Range = 75MHz to 475MHz (this is narrow band signal) …
    • Resolved
    • Answered

  • ADS54J42: "Fs/4 +/- Fin" Spurs and "Fs/2 - Fin" Spur

    Resolved
    Part Number: ADS54J42 Hello, My customer has a question. [Q] Is there a way to mitigate "Fs/4+/-Fin" spurs and "Fs/2-Fin" spur ? [My understanding] These are spurs caused by gain mismatch and phase mismatch, but I don't think there is a way…
    • Resolved

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