ADI microblogging users @TaterLi : based on experience , using the Delta-Sigma 's ADC, after switching two or three results are not reliable , the use of SAR ADC is very good , but the SAR ADC was terribly expensive . Is it because the SAR without filter The establishment time ? Impossible .
ADI Expert Answer: The filter inside the Sigma-delta ADC requires additional setup time for channel switching, so what happens when the channel switches. The advantage of the Sigma-delta ADC is its high accuracy and is typically suitable for low speed / high precision signal acquisition. If there is a clear requirement for speed, sigma-delta can not be used, you can use SAR ADC. But ADC's newly released sigma-delta ADC AD7176 , 24 -bit, throughput can reach 250KSPS .
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