TIDA-00813, 2-GHz Complex Bandwidth DC-Coupled 14-bit Digitizer Reference Design

TIDA-00813, 2-GHz Complex Bandwidth DC-Coupled 14-bit Digitizer Reference Design. Modern high-speed data acquisition systems push for higher bandwidth while delivering state of the art performance. Next generations systems require instantaneous bandwidths beyond 1GHz to cover new emerging communications standards such as 802.11 ac and 5G. To achieve wider bandwidths a dual ADC is used as a complex (IQ) receiver in 0-IF type architecture. This design describes a 2GHz wide band digitizer consisting of a dual RF ADC driver and a dual channel, 14bit, 3Gsps ADC with the necessary analog filter network. This design captures 2GHz of frequency spectrum at RF first with a wide bandwidth IQ demodulator and then amplifies, filters and samples the two complex frequency bands at baseband, dc-1 GHz