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Selection of high speed Processor and ADC for real-time application

Tariq Siddiqui
Expert 2270 points
Other Parts Discussed in Thread: OMAP-L138, OMAP-L137

Hi,

My application requires sampling and real-time processing of 3 analog signals with maximum frequency of 1 MHz. I need to sample with atleast 2 MSPS ADC to avoid aliasing. After sampling each channel one by one, DSP will compute FFT and later on further post-processing over the FFT data will be performed. This system is intend to work stand alone.

I am precisely looking for;

1. High speed DSP to process 1 MHz signal in real-time.

2. DSP with atleast 3 Timer to signal 3 ADCs in parallel.

2. 3 or more channel ADC card- easy to interface with the chosen DSP.

3. 8192 or higher N point FFT computation.

4. Larger SDRAM to process large amount of data.

5. Larger Flash OR MMC/SD card feature to save larger amount of processed data to be further analyzed on Matlab or other software.

6. WLAN connectivity to send processed data to some storage unit.

I would really appreciate your help in selecting the right processor for my application.

Regards,

Tariq Siddiqui

  • 0
    TI__Guru* 84110 points

    Tariq,

    Start with the OMAP-L138 and see how well it will meet your needs with the available features on the current boards and any add-ons you may find for it.

    Regards,
    RandyP

  • 0 in reply to RandyP
    Expert 2270 points

    Randy,

    Thanks for your input.

    I looked out OMAP-L138, seems to do the work but it is expensive device. In contrast, OMAP-L137 has kind of similar features and costing only $395.

    Should I not go for OMAP-L137 ?

    What kind of data acquisition evaluation module (EVM) are available for OMAP-L137/38 family ?

    Is it possible to interface any ADC made by TI, having 10 MHz sampling rate with OMAP family ?

    Regards,

    Tariq Siddiqui

  • 0 in reply to Tariq Siddiqui
    TI__Guru* 84110 points

    Tariq,

    Because I am aware of your situation outside of this forum, I can mention that in the OMAP-L138 list of development boards, there is a lower cost option for the Experimenter Board for members of the TI University Program.

    I have not done a detailed analysis using all of your criteria for this application, so I cannot say which of the various boards would be suitable or which of the many DSPs will be capable or not. The OMAP-L138 is what seemed to be the most likely to meet your requirements from the first post, but the included peripherals and the available add-on boards are not something that I know enough about to comment.

    Please look through the Applications section on the home page of TI.com to see what system block diagrams we have that might fit closely to your application. It does become a more difficult task when you add in the apparent requirement for using only low-cost retail development boards.

    If no one else jumps in with an exact solution for you, your next best option will be looking at a broader range of development boards and TI Partners who have products that are not listed on the Product Folder. Maybe some of those are listed in the TI Design Network section of TI.com.

    Regards,
    RandyP