• RE: a question about direct digital down converter about ad6655

    The difference you are seeing is a side-effect of the actual frequencies used by the simulator to source the ADC model.  They are not exactly 27.2 MHz and 27.3 MHz as you've requested - they're more like 27.2034 MHz and 27.301 MHz.  The reason these…

  • RE: when I use the ad6655，how can I confirm the reference phase?

    hi，I want to know the difference between offset binary and two's complement in the output mode. How do I configure him? thanks

  • RE: Query about AD6655 DC Offset Adjustment

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …

  • AD6655 external spi configuartion problem

    I m trying n trying configuring ad6655 through spi externally,here i m using pic controller to send data,read back operation i tried was ok,but when i tried to write and divide output clock i could not configure it..
    i checked spi controller software output…

  • RE: AD6655 for a Narrowband CW RX (500Hz to 25KHz)

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …

  • I m trying to configure AD6655 by SPI,but it seems data writing doesnot occure..i m following datasheet, app note 877 also..but still failed..so kindly give me the spi code to write ad6655..

    I m trying to configure AD6655 by SPI,but it seems data writing doesnot occure..i m following datasheet, app note 877 also..but still failed..so kindly give me the spi code to write ad6655..

    my data array is given here..
      signal array1 : LUT_typ := (X…

  • Input configuration in AD6655 Evaluation Board

    Hello everybody,

    I want to use AD6655 EVB with a 130 MHz clock signal for sampling a 15MHz bandwidth signal centered around 400MHz. As I have read in the AD6655 datasheet (page nº30) several input configurations are recommended depending on the frequency…

  • RE: AD6649, AD6655, AD6544 eval board differences

    Hi Jacob,

    You can find the FPGA code here (AD6655 FPGA code) to use as an example (note AD6655 shares the FPGA code with the AD9640).  This is only for example so please note the disclaimer included in the zip file.

    Regards,

    Jonathan

  • AD6655, Spectral reversal


    Hi Jonathan,

    One more question about AD6655.

    "In the event of even Nyquist zone sampling, the half-band filter can be configured to provide a spectral reversal. Setting Bit 2 high in Address 0x103 enables the spectral reversal feature." this is from…

  • Connect ADSP-SC584 to AD6655 with SPI?

    AD6655 has a SPI port to program the internal registers, the port has 3 pins: SCLK, SDIO and CSB.

    According to datasheet of AD6655 and AN-877, the SDIO pin is used as both writing and reading, the SDO pin is omitted.

    But the SPI port of SC584 has  4…