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  • DAC38RF83: High Phase Noise of DAC38RF83 with external reference

    TI Thinks Resolved
    Part Number: DAC38RF83 Dear forum members, We do have the problem of high phase noise when using the DAC38RF83/ We would like to get information where root cause of the high the phase-noise could be. Environment: 1. Input ref of 2560Mhz to…

  • DAC38RF83: Current consumption

    Part Number: DAC38RF83 Hi all My question is about the -1.8V connected to the dac. I see almost zero current consumption in the -1.8V DC (I verified that the voltage actually gets to the DAC), and I can't see any output frequency. I have another DAC…
    • Answered

  • DAC38RF83: optimize the RBD value

    Resolved
    Part Number: DAC38RF83 Other Parts Discussed in Thread: LMK04828 , I use a dac38rf83 with LMK04828 as the JESD204B clock generator and Intel Arria10 FPGA as JESD204B TX. JESD204B parameters are LMFSHd = 44210, K=32(Dual DACs, 1 IQ pair per DAC, 2 lanes per…
    • Resolved
    • Answered

  • RE: DAC38RF83: Minimum delay for SPI

    Resolved
    Hi Jim The answer solved my questions. Thank you and regards Moti
    • Answered

  • DAC38RF83: Phase noise?

    Resolved
    Part Number: DAC38RF83 Other Parts Discussed in Thread: LMK04821 Hi, When the NCO is set to 767MHz, a signal of about 53dBc (like phase noise) is generated from the modulated signal in the range of about 10MHz centered on the modulated signal of about…
    • Resolved

  • DAC38RF83: Datasheet inquiry

    TI Thinks Resolved
    Part Number: DAC38RF83 Dear Team, My Customer would like to understand Table 4. SerDes PLL Modes Selection in datasheet. It connects MPY hex value to actual multiplier. The default MPY value is 00010100 - it is 0x14 in hex. There's no such value in this…
    • Answered

  • DAC38RF83: FIR filter coefficients

    Resolved
    Part Number: DAC38RF83 Hello, Is it possible to change the FIR filter coefficient values of the DAC38RF83, from those listed in Table 35 of the datasheet? I was hoping there might be some undocumented register(s) for doing this. We'd like to change…
    • Resolved

  • DAC38RF83: Auto-tune multiple DAC38RF83 devices ?

    Part Number: DAC38RF83 Dear Team, My customer is using multiple DAC38RF83 on board operating with their internal PLL. We’re trying to understand how we can cut the PLL auto tune time to the minimum ? If we know the device temperature , can we preset…
    • Answered

  • RE: DAC38RF83: tuning and baseband operation

    Resolved
    Hello Scott, I am adding some clarifications and distinctions to this thread in the case that it should be referenced in the future. To clarify the LP filter is better described as being maintained by the PFD and charge pump rather than being manipul…

  • DAC38RF83: SYSREF and no DAC output questions

    TI Thinks Resolved
    Part Number: DAC38RF83 What are the min and max Vcom for the DAC38RF38 SYSREF input? Datasheet only says 0.5V for typical. Also, what is the min Vi(dPP)? The datasheet only gives typ (800mv) and max(2000 mv). We are driving this with a signal that has…

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