• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 50 subscribers
  • Views 1543 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Digital to Analog Converter for arbitrary waveform generation

Vinod VK
Prodigy 240 points

Other Parts Discussed in Thread: DAC5681, DAC5675, DAC5682Z

Is there any high speed DAC(200 MSPS) which supports arbitrary waveform generation.

For example, I can generate gaussian random noise in Matlab/Scilab and store these values in an SRAM connected with DAC and generate an analog waveform.

  • 0
    Prodigy 130 points

    Hello Vinod,

    I have been looking for DACs that can be used to generate arbitrary waveforms lately, as well.

    If you are looking for 200Msps sampling rate, you probably need to generated signals of up to 100MHz bandwidth. There are many options that Texas Instruments provide and you have to pick up one DAC depending on the resolution you need - 12,14, 16 bits, as well as the bandwidth of the signals and other specifics, too. Here is one 14 bit, 400Msps DAC - DAC5675. If you need faster - DAC5681 can be considered.

    Best regards,

    Andrey.

  • 0 in reply to Andrey Delev
    Prodigy 240 points

    Can I give the arbitrary waveforms (with sampling period information) through the GUI to the DAC EVM.

  • 0 in reply to Vinod VK
    TI__Guru* 83495 points

    Vinod,

    Pretty much all of our DACs can be used as an arb generator. You can visit our ti web to search for the DAC with most suitable input/output interface for your application

    http://www.ti.com/lsds/ti/data-converters/high-speed-dac-greater-10msps-products.page

    For input interface, we have CMOS, LVDS, and JESD. For 200MSPS, CMOS or LVDS should be sufficient. Our DAC output have either ground referenced (current source) or AVDD reference (current sink). You will need to decide based on the output signal chain bias. 

    Our DACs do no have build in memory for waveform storage. You will need to send the data from your FPGA/ASICs to our DACs. We have tools such as HSDCPRO, TSW1400, and the TSW14J56 to interface with our DAC EVMs for evaluation purposes.

    http://www.ti.com/tool/tsw1400evm

    http://www.ti.com/lit/ug/slwu087a/slwu087a.pdf

  • 0 in reply to Kang Hsia
    TI__Genius 12965 points

    Also just to add some more info - you can use the TSW3070EVM which demonstrates an active DC coupled interface for the DAC5682z.  This was intended as an example of the front end for an arbitrary waveform generator front end.

    The documentation refers to the obsolete TSW3100, but you can use the TSW1400 and HSDC Pro to replace the TSW3100.

    Ken