3 V, Dual Sigma-Delta ADC with Auxiliary DAC Features:+3 V Supply Voltage Baseband Serial Port (BSPORT) Differential IRx and QRx Auxiliary D/A Converter Auxiliary Serial Port (ASPORT) On-Chip Voltage Reference Low Power 28-Lead TSSOP/28-Lead SOIC ADC Channels- Two 15-Bit Sigma-Delta A/D Converters- FIR Digit