IEEE Journal of Solid-State Circuits vol:28 issue:6 pages:640-647
The design and measured performance of a two-stage third-order SIGMADELTA analog-to-digital (A/D) converter is described. The A/D converter achieves a 96-dB dynamic range and a maximum signal-to-noise-plus-distortion ratio (S/(N + D)) rms/rms of 93 dB with 320-kHz output rate and an oversampling ratio of 64. A novel analysis on the integrator gain error is presented. The modulator is realized in a 1.2-mum double-metal single-poly CMOS process with an active area of 1.6 mm2. This modulator operates from 5-V power supply and a single reference voltage.