A 10 bit 12.8 MS/s SAR analog-to-digital converter in a 250 nm SiGe BiCMOS technology

摘要

This paper presents a 10 bit 12.8 MS/s successive approximation register (SAR) analog-to-digital converter (ADC) implemented in a 250 nm SiGe BiCMOS technology. An energy-efficient switching algorithm with top-plate sampling is applied which reduces the total input capacitance by 50%. High-impedance inputs with emitter followers and internal reference voltage generation make it suitable for applications that require precise on-chip voltage monitoring.