Hi Naser, Thanks for the data. There is clearly something else connected to MISO as there appears irregular spikes that are not corresponding to the CS of the devices shown. Can you provide a schematic of what is connected? As Tom has already stated, this is usually caused by a contention from another device. When the ADS1146 has CS high, the DOUT of the device goes to tri-state. As there are periods where the MISO line goes high when both CS are high, this would be from either another device driving the line, or there is a pull-up on the line. But as the MISO line also goes low when both CS are high, there must be something else connected. Whatever else is connected most likely is the cause of the issue being seen. Best regards, Bob B
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