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  • DAC38RF89: There is near - end spurious in DAC38RF89 output

    Part Number: DAC38RF89 Other Parts Discussed in Thread: LMK04828 The DAC output is 1100MHz. There are spurious of 1M and 37.5M, respectively. The PLL configuration of the DAC is as follows：0x31 0x0400； 0x32 0x0508；0x33 0x2A24. The DAC clock is 200MHz of…
    • Answered

  • DAC38RF89: BALUNs DAC Layout

    Resolved
    Part Number: DAC38RF89 Hello, I'm Using the DAC38RF89I and wanted to know what is the best way to place the BALUN peripherals. For mechanical issues I can't use parts in the Print side (P.S) with thickness bigger then 0.3mm,　　 so the inductors could…
    • Resolved
    • Answered

  • DAC38RF89: PLL/VCO Jitter ＆VOUT Skew

    Resolved
    Part Number: DAC38RF89 Hi, Our customer have two questions. 1 Is there a spec for the output jitter of the internal PLL (including VCO)? Also, is there a way to calculate jitter? 2. If we set the same data for two outputs and start sending, Will there…
    • Resolved

  • DAC38RF89: When debugging, 204B interface instability issue

    TI Thinks Resolved
    Part Number: DAC38RF89 When debugging, everything works well when 204B interface channel rate is 10G. When a t 12G, the SYNC signal is occasionally pulled low, causing resynchronization. The other registers are unchanged, except for the corresponding modification…
    • Answered

  • DAC38RF89: DAC38RF89 - Current & Power

    Resolved
    Part Number: DAC38RF89 Hello, Some questions regarding the DAC38RF89 Currents: 1. In Figure 149 (Power Supply Scheme) The VDDDIG1 Current shown is 2.5A ; While in the "Electrical Characteristics - DC Specifications" (Section 7.5) The Max Current…
    • Resolved

  • DAC38RF89: data sequence of FPGA

    TI Thinks Resolved
    Part Number: DAC38RF89 HELLO, I use DAC38RF89 with the mode LMFSHd = 82380 1X，the FPGA is XC7K410T-2FFG900, NOW the link of jesd204b is ok, but the output of DAC wave form is incorrect ， so I doubt that the sequence of the data I arranged in FPGA endding…

  • RE: DAC38RF89: The output after DUC is symmetric with respect to NCO frequency。

    Yunlong, Set address 0x27 to 2222. Regards, Jim
    • Answered

  • DAC38RF89: SYSREF differential input

    Resolved
    Part Number: DAC38RF89 Is there a minimum defined for the differential input peak-to-peak voltage for the SYSREF?
    • Resolved

  • DAC38RF89: SYSREF INPUT, Fixed VOL Input Bias Setup for AC Coupled Network

    TI Thinks Resolved
    Part Number: DAC38RF89 Other Parts Discussed in Thread: LMK04828 , DAC38RF83 Hi, I am referencing section 7.4 on page 14 of this document: https://www.ti.com/lit/an/slaa696/slaa696.pdf?ts=1600379502443&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct…
    • Answered

  • DAC38RF89: Output summation block

    Resolved
    Part Number: DAC38RF89 Hi, In the section 8.3.20 of the datasheet, table 44,the outsum block perform rounding operation after addition. Why use bits[16:1] from the result when only one channel is added? Isn't it half the result？ I think that…
    • Resolved

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