• Locked Locked
  • Replies 2 replies
  • Subscribers 46 subscribers
  • Views 1686 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.

ADS1278 + ADS1274 + DAC8734 full rate on Ethernet easy EVM board - interested?

Sebastian Osterfeld
Prodigy 40 points
Other Parts Discussed in Thread: ADS1274, ADS1278, DAC8734

Hello,

I previously tried some of the TI EVM boards but I was unhappy with the data transfer rates - acquire 1 second, then wait 20 seconds to get the data to the PC via USB. Not very useful.

I asked why there aren't any good solutions to hook up ADC EVMs via Ethernet. The answer was "there is no demand for such a thing".

Well, I completed a side project where I have put an ADS1278 + ADS1274 + DAC8734 on the same small EVM PCB, with a common clock and ref voltage source. The SPI data from the ADCs is aggregated with a Spartan6, and sent out over Ethernet with a Wiznet W5300 chip at full rate - 24 bits, 48kHz, 12 simultaneous channels. The data is sent out as UDP packets every 1ms, so latency is very low. Streaming only starts when a client connects to the EVM and requests data. Prior to that, the EVM sits idly by and broadcasts its presence every few seconds for easy discovery.

Meanwhile, the DAC8734 outputs 4 simultaneous waveforms from on-board non-volatile memory at 96kHz. The Spartan6 uses hardware multipliers to permit real-time volume modifications by UDP commands that the EVM receives.

This board has very low latency, real-time data streaming, low noise, and great reliability. Requires no USB drivers, and the UDP packets are easy to parse.

So my question is - is there some interest in an EVM like this? I am considering whether I should put some time into making this a kickstarter project or something similar. 

Feedback, please.

  • TI__Guru* 99325 points
    Sebastian,


    It looks like you've put in a lot of work in this project. While at TI, we generally will roll our own EVMs so that we can support a wide variety of devices, there might be others interested in your work. Posting a kickstarter project might be a good idea


    Joseph Wu
  • TI__Genius 10615 points
    Hi Sebastian,

    Following up on Joseph's comments, our EVMs are supposed to allow customers to quickly evaluate our devices.

    I work for the precision DAC group, so I can only speak about the DAC EVMs. While your solution will allow some customers to get information with a lower latency than an USB solution, others will not utilize the full capabilities of your design, while others will require even faster rates that can only be achieved via direct SPI or parallel interfaces. In other words, we have a large spectrum of customers that use our devices, sometimes for only their precision, sometimes their speed, or both. Our EVMs only attempts to attempt to showcase certain features of the device, while keeping the cost relatively low so the customer can more confidently start designing their own solution that is optimized for their particular application.