30kSPS. TI's ADS1256 chip is a 24BIT delta-sigma ADC with a conversion speed of 30kSPS. Oversampling ADC, or noise shaping ADC, also called Delta-Sigma ADC. There are many names, and they basically consist of a difference circuit and an integral summation circuit to form a modulator, and then a digital filter is used to obtain an Nbit digital output.