Hi,
I want to read ADC at high speed (Conversion Time=1.1ms) using DC742B Board and Linduino One Board. I connected the DC742B Board and the Linduino One Board with a ribbon cable. I uploaded the DC590B code on github into Linduino One Board. I applied it from the CH1 input of the DC742B Board by making a voltage divider (about 1Volt) with an 18K resistor and a 5K resistor. Then I was able to read this voltage with the QuikEval K114 interface. I read the SPI line of the LTC742B Board with the help of Logic Analyzer. When I selected the Conversion Time option on the QuikEval K114 interface as 36ms, 72ms and 145ms and read the SPI with the logic analyzer, I actually saw that the data was updated at these intervals. However, when I set the Conversion Time option down to less than 36ms (1.1ms, 2.3ms, 4.5ms, 9ms, 18ms), I saw that the data could not be updated at the selected intervals and the data was updated at variable intervals between 21ms-28ms, no matter which of these options is selected. What could be the cause of this problem?
The above figure shows the Logic Analyzer interface. Here Conversion Time=1.1ms. However, it is seen that the data intervals are around 23ms.
The figure above shows the QuikEval K114 interface.
Thank you.
