Analog Discovery 2/3/Pro for high-speed waveform averaging

[Oliver Kliebisch]

Hi,

I am considerering the Analog Discovery for the following application but from the datasheet I am unsure if it can perform this type of acquisition:

• I need one DAC-channel to generate a TTL trigger at 20 kHz
• Synchronous to this trigger one ADC channel should acquire the signal at full sampling rate and average at 20 kHz the raw signal (coherent averaging). The averaged signal should then be sent to waveforms/display for the user for further processing.

 

Is this possible with one of the Analog Discovery models? We own several Analog Discovery 2 but it I could only get "software averaging" to work, which is way to slow for our application. Also it is not an option to have a high speed transfer to a beefy PC to do the memory averaging on that hardware. It should be an embeddable solution.

 

Thanks!

[attila]

Hi @Oliver Kliebisch

The ADP3X50 has device memory for 128Mi ADC samples, allowing capture on up to 4 channels at up to 125MHz. Recently device buffering support was added, which can perform up to 32768 captures with less than 1us latency. The averaging still needs to be done in software. 

The Analog Discovery 1,2,3 has memory for 2x16-32Ki samples and it does not support multi device buffering. The latency between captures is limited by the transfer to the host. The capture rate can be up to about 4k/sec