Application Note SBJA019 ε (a) fS 2fa max A fa max fS – fa max fS fS + fa max f (b) fS < 2 fa max fS – fa max fS fa max f ε JAJA016 WAS 2 fS (c) f fS 2fS 2fS (b) f fS fS X2 FIR (a) f ATT LPF A Digital fS f A Analog fS f Din Aout Conventional DAC DAC ∆Σ – ± – – ∞ – – – A fa max f fS fS – fa max Post LPF 3 (a) fS f (b) 4fS 6fS 2fS 8fS f (c) 8fS 2fS 4fS 6fS nfS f ATT = –p dB × 8 D.F ATT = –p dB ∆∑ Mo