Behavioral Modeling of a Programmable UWB/Bluetooth ADC

This paper presents the system level design of a programmable ADC that can cover the bandwidth-accuracy space of UWB and Bluetooth standards by employing a capacitive interpolation flash ADC and a sigma-delta ADC. The system level performance of the ADC architectures has been evaluated, and circuit level specifications have been established, considering the most critical circuit non-idealities. The behavioral simulation results show that the ADC can achieve 30 dB SINAD at 528 MSPS in UWB mode, and 86 dB SINAD at 1 MSPS in Bluetooth mode.