The AD1974 ADC Stop Band and Pass Band frequencies scale linearly with Fs,
according to the multiplier in the datasheet, Table 6. This holds true across
the entire range of sample rates, up to the 192 kHz upper limit.
@96KHz: Stop Band Frequency = 0.5625 * 96KHz = 54KHz
@192KHz: Stop Band Frequency = 0.5625 * 192KHz = 108KHz