SBAS813 June 2018 ADS8688AT
PRODUCTION DATA.
In order to mitigate the noise of the front-end amplifiers and gain resistors of the PGA, each analog input channel of the ADS8688AT features a second-order, antialiasing LPF at the output of the PGA. Figure 69 and Figure 70 show the magnitude and phase response of the analog antialiasing filter, respectively. For maximum performance, the –3-dB cutoff frequency for the antialiasing filter is typically set to 15 kHz. The performance of the filter is consistent across all input ranges supported by the ADC.