• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 46 subscribers
  • Views 788 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.

Picking an ADC chip for a 10 Mhz Ultrasound Transducer Application

Revathi Murthy
Prodigy 90 points
Other Parts Discussed in Thread: MSP430F5438, AFE5851, AFE5805, AFE5808, TX810

I'm interested in analyzing a 10 Mhz ultrasound transducer data (not to make an image; just to analyze the raw data) and I have a MSP430F5438 evaluation board, the HV748 Supertex ultrasound pulser and the MD0100 Tx/Rx Switch from Supertex.

I'm trying to figure out how to sample the 10 MHz data coming from the transducer. The ADC on the msp430 isn't fast enough; is there a different microcontroller (preferably a msp430 that I can put into the 100 pin eval board to substitute the MSP430F5438) whose ADC would be fast enough (I'd need a 50 ns sampling period max/ at least 20 MSPS)? Or should I get a separate ADC?

It seems the TI AFE5851 does have an ADC fast enough for my transducer, but it seems it'd require an additional deserializer to get data in a format that the MSP430F5438 could work with. And this deserializer seems to be 600 bucks for an evaluation model, which is way outside of my budget. What is a lower-cost solution for my problem?

Overall, I need an ADC/chip that can process a 10 Mhz signal and send it to my MSP430F5438 (or an alternate microcontroller), preferably without additional components in between. 

I think I've found a solution, but outside of TI: http://www.analog.com/en/analog-to-digital-converters/ad-converters/ad9272/products/product.html?ref=ASC-PR-313 the AD9272 which has variable gain, low noise amplifier, etc inside it as well..  Is there any TI product that's comparable?

It'd be great to get some feedback on whether I'm going in the right direction. Thank you!

Raven

  • 0
    TI__Expert 6320 points

    Raven,

    We can get back to you very soon on this, most likely today.  Let me do some research to make sure I point you in the right direction. I gather that your key concerns are

    >=20MSPS Sample Rate

    Low cost solution

    Simple solution (Do require a gain stage such as in the AFEs? Or just straight ADC?)

     

    In the meantime, I will point you to our medical imaging solutions page:

    http://www.ti.com/solution/ultrasound_system#Selection%20and%20Solution%20Guides

    Also,  Do you require a microcontroller with integrated ADC, or could it possibly be  a uC + an ADC?

     

    Thanks,

    Chuck Smyth

    Applications Engineer, TI Medical

     

     

     

  • 0
    TI__Expert 6320 points

    Raven,

    If it is a straight ADC that you are looking for, we have something hitting the market quite soon that might meet your needs and I can get you info on that soon if needed. However, it doesn't have a front end with an LNA-PGA-VCA.  If you are looking for something closer to the ad9272, I would point you to our

    12-bit AFE5805 Analog Front End for Ultrasound:     http://www.ti.com/product/afe5805

     or for more performance, the 14-bit AFE5808:   http://www.ti.com/product/afe5808

     

    However, all of our medical solutions output in the LVDS format, which requires some sort of deserializer like the TSW1250 EVM ($600).  I understand your cost aversion with this, but we might be able to work something out so that this is not stumbling block.

    Can you tell me more about your application? Is this for student or business? Is there production date that you are trying to meet?  

    Also, I want to make sure that you know we have a T/R switch solution that is integrated, the TX810: http://www.ti.com/product/tx810

     

    Thanks,

    Chuck Smyth