The ADS981x features a PGA at every analog input channel. The PGA supports single-ended and differential inputs with a bipolar signal swing. Table 6-1 lists the supported analog input ranges. The analog input range can be configured independently for each channel by using the RANGE_CHx register fields in address 0xC2 and address 0xC3.

Each analog input channel features an antialiasing, low-pass filter (LPF) at the output of the PGA. Table 6-2 lists the various programmable LPF options available in the ADS981x corresponding to the analog input range. Figure 5-14 and Figure 5-15 illustrate the frequency responses for low-bandwidth and wide-bandwidth LPF configurations. The analog input bandwidth for the eight analog input channels can be can be selected using the ANA_BW[7:0] bits in address 0xC0 of register bank 1.