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I am working with DAC80504EVM and ADS8920BEVM-PKD from TI. I am trying to design a system which uses TMDSEVM6657EVM processor board to communicate with these converters via SPI.

However, I am trying to figure out how to synchronize the converters and I would really appreciate any suggestion or direction in research.

Here are the datasheets:

ADS8920B ADC - ADS8920BEVM-PKD
DAC80504EVM
TMS320C6657 DSP home page

Edit: I am building a system for 3D ultrasonic distance measurement. Three outputs of DAC would drive three transducers, which then transmit three signals. These signals would be received via hydrophone, which then sends signals to ADC. I want to transmit the signals, receive them and process in DSP. I would like to do matched filtering in order to compute time of arrival for every transmitted signal. That is why I am trying to figure out how to synchronize transmission and reception.

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  • \$\begingroup\$ why do you need synchronization? \$\endgroup\$ – DKNguyen Apr 11 '20 at 18:13
  • \$\begingroup\$ I am building a system for 3D ultrasonic distance measurement. Three outputs of DAC would drive three transducers which then transmit three signals. These signals would be received via hydrophone, which then sends signals to ADC. I want to transmit the signals, receive them and process in DSP. I would like to do matched filtering in order to compute time of arrival for every transmitted signal. That is why I am trying to figure out how to synchronize transmission and reception. \$\endgroup\$ – Deanna77 Apr 11 '20 at 18:50
  • \$\begingroup\$ Could you mux the adc to the dac line upon transmision so your adc knows when the dac started and then mux away to your receiver? it would be more convenient if you just had simultanous sampling adc so you could dedicate one channel to monitoring the dac. \$\endgroup\$ – DKNguyen Apr 11 '20 at 18:55
  • \$\begingroup\$ but is the latency and jitter between your spi,adc,and dac actually enough to matter? sound travels slowly \$\endgroup\$ – DKNguyen Apr 11 '20 at 19:02
  • \$\begingroup\$ To be honest, I am trying to understand the system, and I think I don't have enough knowledge about it now, that's why I wanted to get some ideas to get me started. At least so that I know in which way to think. \$\endgroup\$ – Deanna77 Apr 11 '20 at 19:52

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