Enhanced fast digital integrator for magnetic measurements.

An enhanced Fast Digital Integrator (eFDI) was prototyped to satisfy the new requirements arising from current on-field exploitation of the previous Fast Digital Integrator in magnetic measurements for particle accelerators at CERN. In particular, the prototype achieves improved performance in terms of offset (5 ppm on 10 V fullscale), self-calibration accuracy (1 ppm of residual error), and data throughput (100 MB/s), by simultaneously preserving high-level signal-to-noise and distortion ratio (SINAD 105 dB at 10 Hz). In this paper, initially, the specifications, the design solutions, and the main features of the eFDI are illustrated. Then, the experimental results of the metrological characterization are compared with the CERN state-of-the-art integrator FDI performance in order to highlight the achieved improvements.