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Ultrasound solutions TSW1400 + AFE58~, transmitting circuits

Younsu Kim
Prodigy 90 points

Other Parts Discussed in Thread: TX517

HI, 

 I am planning to buy an ultrasound front end solution. 

 I have read the TSW1400 documentation, and it supports external trigger and capture option. 

 Question 1. 

 If I use an ADC AFE58~ serise with TSW1400, is it possible to save more than 20khz repitition rate for 20~30us time window(~2k samples in 65MHz)? (Applying 20khz external trigger)?

 With USB 3.0, I think it is enough bandwidth to transfer such data. 

 Question 2. 

 I found Ti also have tx-sdk-v2 transmit solution. However, I found the power apply is very cumbersome (12 different voltages including +-50V). I dont think I have that many power supplies. Is there easier solution for transmitting?

Thanks. 

  • 0
    TI__Expert 6320 points

    Q1: Repeated transfer of data to the PC is not very good with this solution.  The on-board memory depth is about 1GB, so you can save a large amount of repeated frames and then transfer to the PC.  The overhead for the USB2.0 data transfer is too much for 20kHz.  We have a similar solution using the TSW14J56 (JESD204B) with the AFE58JD1x EVM.  This can transfer 4kSamples/ch frames at about 25Hz into a C-based environment where it can then be processed.  That means for every 40ms, you get a memory dump of 16 channels x 4kSamp x 14b. The TSW14J56 has USB3.0, as well. This is the best that we can currently do.

    Q2: We have a 1-2 channel 17-level device called the TX517, but it also requires a suite of  about 9 power supply rails.

    Thanks,

    Chuck Smyth

  • 0 in reply to Chuck Smyth
    Prodigy 90 points

    Thank you for your great answer, Chunk.

    I have more detailed questions on it. 

    1. The memory depth is 1GB. If I collect a single channel of 4k samples per each window, then the size would be 14bit * 4kSamp = 7kB per sample set. Therefore, I can write ~140k sample sets in 1GB memory and transfer to the PC after with provided software, is it right? After 1GB memory is fully written, the sampling process would be stopped by the software? 

     2. With TSW14J56 (JESD204B) with the AFE58JD1x EVM. If I save a sngle channel instread saving 16 channels, is it possible to get 16*25Hz = 400Hz memory dump with 1 channel * 4kSamp * 14b?

    Thank.

     

    Younsu Kim

  • 0 in reply to Chuck Smyth
    Prodigy 90 points
    I really want to know the functions that will be available with the product.

    Can I sample and process 4k 14bits data from 1 or 2 channels in around 1khz and transfer it via USB3 in real-time?
    If the overhead is not so big, I think it should be possible since the bandwidth of usb3 is very 5Gbit/s.

    Thanks.