• AD5781 NSD


    Please tell me how measure Output Noise Spectral Density for AD5781? What is test methodology? Thanks.

  • AD5781 THD

    The datasheet specifies Total Harmonic Distortion of 97dB typical (1KHz tone, 10KHz sample rate).

    I am having difficulty reproducing this on the Eval-AD5781.  What amplitude was the 1KHz tone?  Was this measurement collected from the Eval Board?  I am seeming…

  • AD5781 Daisy Chain

    需要设计多路DAC,AD5781原来资料上有关于daisy chain的说明,新版datasheet上删掉了,请问AD5781还能以daisy chain的方式连接吗?

  • AD5781 input timing


    My customer asks me below about AD5781.

    Please let me know your advice.


    When can we input signal ( SCLK) to AD5781 after power on ?

    We would like to know if we need some wait time after power on.



  • AD5781 Daisy Chain


    I noticed that the Daisy Chain was deleted from the new revison datasheet. Dose it means AD5781 absolutely can't support dasychain mode?

    I need multichannel 18bit DAC with only 1 SPI port. For the strict timing requirement and system performance…

  • AD5781 Readback mode


    Please let me know about minimum SCLK cycle time of  AD5781 at readaback mode.

    Datasheet says below at table4 timing characteristics.

    t1 = 28 ns min : SCLK cycle time

    t1= 60 ns min: SCLK cycle time (readback mode)

    In attached  readback mode timing…


    Hello,i have some question about AD5781-eval board.I wrote SPI code about AD5781, and then downloaded it to the evaluation board through FPGA.I set the signal  'LDAC'  on the evaluation board to 0,'RESET'to'1',and 'CLR' to…

  • AD5781 - not working


    I'm using the AD5781 for the first time, programming is done by ATE (something like FPGA, but more flexible).

    I'm not getting any vout, it's set to 0 constantly.

    Below is my schematics, and the signals driven to the chip.


  • Help on AD5781


    I've to make working an AD5781 with a Spartan 6 FPGA. I'd like to control it using a simple VHDL driver and not a hudge SPI one but the dac doesn't work. I put a part of my vhdl driver as you can take a look and tell me what's wrong. Thanks in…

  • AD5781: Combining 2 DAC outputs


    We want to use the AD5781 in our application, here the One DAC will be with reference of 1V and other DAC with 2V.

    And we want to combine the two outputs by shorting the outputs to get 3V output.

    So is it correct to short the outputs of two AD5781…