• AD9833 vs AD9837 output peak to peak

    I have used AD9850, and the output signal looks good but the power consumption was high (76mAmp at 5V).

    I am now using AD9833 and AD9837; I was able to output sine wave with both AD9833 and AD9837 but seems that there is slight distortion.

    What I want…

  • AD9837

    When using the MSB out feature/function, what is the amplitude of the output pulse?  Is it CMOS levels?



  • AD9837 issue...


    I would like to ask a question about the following issues.

    - System

      ; AD9837 evk(Mclk 16Mhz) + control board + AD9837 SDZ(PC Tool)

      ; PC Tool setting  -> Freqreg = 3Mhz, Phase = 0,. Sleep option = Full Power UP, Iout Output = Sinusoidal, Sign Bit…

  • EVAL-AD9837


    Does the AD9837 eval board have a memory to recall the settings? Will it remember to output the frequency on power cycle? If not, can anyone suggest an alternative chip? 

    Also, what is the output power level of this DDS in KHz frequency range?


  • AD9837

    I programmed the AD9837 DDS with the following commands
    Why does the sinusoid generated have a frequency of about 975Hz?
    I have checked the FSYNC, SCLK and DATA line is correct.

    MCLK = 16MHz

  • AD9837 DC offset?

    What kind of DC offset does the 9837 have at the output?

    I don't see it in the data sheet, and I'd like to DC couple the output of the AD9837 to an op amp if I can.

    5V supply, maybe a gain of ... 7 or 8?

    Thank you.

  • AD9837 Phase issue


    I'm having an issue when measuring the phase using the AD9837.

    The AD9837 is running with an 8 MHz MCLK input.

    I configure the AD9837 in a loop like this:

    1. Reset (no sleep)
    2. Write FREQ0/1 19000 Hz
    3. Write PHASE0 = 0
    4. Disable reset, PSEL=PHASE0, FSEL…
  • AD9837 Triangular Waveform


    I'm planning to use AD9837 to generate triangular waveform. AD9837 output voltage is between 0.037V - 0.645V. I need 0 - 5V 250KHz triangular waveform. So, I will design a opamp circuitry (as below) to generate 0-5V triangular waveform. I searched…

  • AD9837 with PIC18F

    Hi, i need some help with programming AD9837. I need to generate frequences between 12050Hz - 20050Hz. MCLK=15MHz. I'm using PIC18F47J53 to program AD9837 and mikroC. I've written some functions for this, sometimes it looks that AD works well, but sometimes…

  • Noisy AD9837


    I made a breakout board for the AD9837 chip. I referred the open source Sparkfun hardware design and it worked. I also used the library created by sparkfun to program the chip using an arduino. The output seems to have some high frequency components…