Dual channel time‐to‐digital converter module with 10 ps resolution and 320 ns full scale range

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Abstract
A dual‐channel time‐to‐digital converter (TDC) module designed to accurately measure time intervals with 10 ps resolution, about 21 ps root‐mean‐square (rms) precision and 125 fs rms differential nonlinearity, over a 320 ns full scale range and up to 4 Mconv/s per channel is presented. The module can also operate the two channels in parallel, as a single TDC converter, in order to improve timing performance to about 15.3 ps rms. A USB 2.0 interface provides the power supply and allows fast data transfer to a computer, where a dedicated software interface handles measurement data and plots. Because of the excellent timing performance, compact dimensions and low power consumption, the dual‐channel TDC module is suitable for advanced multi‐channel time measurements at the picosecond level.