A 1.2V Programmable ADC for a Multi-Mode Transceiver in 0.13μm CMOS

A flexible ADC for a multi-band and multi-mode transceiver is presented. It can be reconfigured between pipeline and DeltaSigma architectures for power optimum operation in WLAN/WiMAX and GSM/CDMA2000/WCDMA, respectively. A maximum dynamic range of 76 dB with less than 1 mW at 1.2 V supply was achieved using voltage scaling and closed-loop opamp design techniques. The prototype was built in 0.13 mum CMOS and the active die area is 0.43 mm
²
.