The customer uses ADS1115 to sample the differential voltage signal output by the pressure bridge. The customer uses the differential input mode. When switching from IN0 and IN1 input to IN2 and IN3 input acquisition, it is found that the switching interval between channels less than 1s will result in a very poor reading result. For the same peripheral, use a fixed resistance bridge and set different DRs, the output results will be different, and the repeated power on and power off results will also be different. If there is no switching and the data is collected slowly for 1s, the digital quantity is relatively stable. Once the acquisition frequency is increased, the sampling results may change from 1700 to more than 400, depending on the Data Rate. Can ADS1115 not switch too fast when switching input channels? What is the minimum delay time for switching between two channels? Is there any case of such multi-channel switching acquisition? In addition, help check whether there is a problem with the circuit. The equivalent internal resistance of the bridge is about 5K. The bridge supplies power with the same voltage as the VDD of ADS1115.
