An 8-bit 80-Msample/s pipelined analog-to-digital converter with background calibration

An 8-bit 80-Msample/s pipelined analog-to-digital converter (ADC) uses monolithic background calibration to reduce the nonlinearity caused by interstage gain errors. Test results show that the ADC achieves a peak signal-to-noise-and-distortion ratio of 43.8 dB, a peak integral nonlinearity of 0.51 least significant bit (LSB), and a peak differential nonlinearity of 0.32 LSB with active background calibration. It dissipates 268 mW from a 3-V supply and occupies 10.3 mm(2) in a single-poly 0.5-mum CMOS technology.