Hi Manohar , Thanks for sharing your timing. Please see my feedback and suggestion below. 1. Your A04 ADC is working as expected, it operates at 128ksps data rate , see the period of T highlighted on the /DRDY signal which is the output signal from the ADS131A04 ADC, it indicates the period time for a new available data is T=7.8us which indicates the data rate is 1/7.8us=128ksps. 2. Your microcontroller is missing to read the data from the A04 ADC , see the timing below. Your software code on your microcontroller creates too long delay (delay1, delay2 and delay3) for reading one conversion data, your microcontroller is taking T-real time to read one data which is much longer than the required time to retrieve the conversion data from the ADC, T. 3. In order to read the STATUS and the data of 4 channels, the pulse on the MOSI pin before reading the data is not needed. The ADC only requires SPI clocks to shift out the STATUS word and the conversion data. 4. You can also use CPOL=0 and CPHA=1 SPI configuration to communicate with the ADS131A04 ADC. BR, Dale
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