A 28nm FDSOI 8192-point digital ASIC spectrometer from a Chisel generator

This work presents a Chisel ASIC spectrometer generator, which supports a wide array of applications through a modular and parameterized hierarchical design. Customizable features include filter coefficients, FFT bins, automatic pipelining, bitwidth selection with automatic bitwidth growth, and overall topology. An instance of the generator was selected, verified, and taped-out in a 28nm UTBB-FDSOI process to demonstrate its efficacy. Custom serial links bring high-speed data from a 3-bit external ADC to the digital spectrometer, which achieves a sample rate of 17 GS/s with an 8192-point FFT. Such a generator greatly simplifies ASIC spectrometer development, paving the way for future low-cost ASIC systems.