Time-to-digital converters (TDCs) are devices used to measure time intervals in the range of 1 nanosecond down to the picosecond range. The first time-to-digital converters were developed for scientific and research purposes. They were considered a combination of a time-to-analog (TAC) and analog-to-digital (ADC) converter.
The ACAM Time to Digital Converters are used in applications that were previously analog based. They offer much higher resolution and lower current consumption than their analog counterparts. This low current consumption makes these time to digital converters ideal for wireless applications.
Thanks to modern CMOS-technology it is possible to integrate fully digital time to digital converters into a single chip. The high precision of the time measurement - down to 14 ps - in combination with the large dynamic range (up to 30 Bit), the high stability over temperature and supply voltage and the possibilty of a low cost production thanks to the CMOS technology make them the first choice for industrial applications.