Hello Stas, I took some measurements in the lab; below is the ADS127L18 sampling a 10kHz signal with 10% (1us) duty cycle and 0->1V amplitude. The ADS127L18 is sampling the waveform at 1.024Msps. Same plot as above but zoomed in around a single pulse: You can see how the digital filter takes about 4 samples to fully settle to the 1V step input. Below is with 1% duty cycle, or 1us pulse width. As you can see, the ADC is not integrating the signal, but attempting to recreate the signal and is not consistent amplitude due to the sampling window. If you do some searching, you can find a number of different analog integration circuits. Below is an application note from TI that also shows how to create an analog integrator using a standard OPAMP. https://www.ti.com/lit/an/sboa275b/sboa275b.pdf Regards, Keith
↧