• AD1939

    Q 

    Please clarify how the AD1939 decides between Standalone and SPI mode.

     

    A 

    As described in the Serial Control Port section on page 14 of the datasheet,
    powering up the AD1939 in Stand Alone mode puts the part in default mode with
    the exception…

  • About the board "SHARC Audio EZ-EXTENDER"

    Hi  ,

        Under the installation path of Examples in SHARC Audio EZ-EXTENDER，there is many examples just like

    21489 AD1939 C Block-Based Talkthru 192kHz

    21489 AD1939 C Sampled-Based Talkthru 192 kHz

    but the example of the "Sharc EZ-Extender_21489 AD1939…

  • Examples of SHARC Audio EZ-EXTENDER

    Hi  ,

        Under the installation path of Examples in SHARC Audio EZ-EXTENDER，there is many examples just like

    21489 AD1939 C Block-Based Talkthru 192kHz 

    21489 AD1939 C Sampled-Based Talkthru 192 kHz

    but the example of the "Sharc EZ-Extender_21489 AD1939…

  • RE: ADC/DAC and SPDIF

    Hi Jeyanthi,

    I have checked the example, but its not totally clear to me which registers have to be set or cleared to use the AD1939 in slave mode. Also the data sheet of the AD1939 could not answer my questions. Perhaps you can give me some assistance…

  • How to change AD acquisition on ADSP21489 to 480 samples per frame？

    In the ad1939.h,I can choice 256,384,512,768 samples per frame.Now i want to choice 480 samples per frame.How do I achieve it?

    The code in ad1939.h looks like this：

    The code in ad1939.h looks like this

  • AD1939 CODEC sample rate

    For the AD1939 CODEC, data sheet specifies sample rates of 128/176.4/192 kHz if you set control register to '10'.  We did that and are at 192 kHz.  How do we get 128 kHz instead ?  That's the ADC/DAC sample rate we really want.  Thanks.

  • RE: ADSP21469 EZ-Kit with Sigma Studio - Using and External ADC/DAC

    Hi J_Rucker_00,

    The changes that you make on the AD193x SigmaStudio GUI are actually getting updated on the AD1939 on the SHARC EZ-BOARD. Please note that, in this setup, USBi, SHARC and AD1939 are connected in a SPI broadcast mode where USBi is the…

  • RE: Is volume control in AD1939 analog or digital?

    Hi Mårten,

    The volume control in the AD1939 is digital. Please be aware that attenuating the DAC signal will degrade the DNR of the output. Please consider adjusting the signal level in your system outside the AD1939.

    Best regards,

    Coleman

  • AD1939 DAC output impedance

    Hello there,

    I am using the AD1939 to drive a differential buffer and would like to know what is the output impedance of the AD1939 in order to adjust my resistors properly. I tried the datasheet but this information is missing.

    Thank you,

    Fernando…

  • AD1939 BCLK in I2S mode

    Hi,

    I am trying to configure ADC and DAC of AD1939 codec in slave mode on 21469 EZ-Board with I2S mode and bit width of 16-bits. I am generating BCLK and LRCLK from external source (LRCLK @ 48000Hz and BCLK @ 2*16*48000=1.536MHz). But it is not working…