Title :
Analysis of the dynamic SFDR property of high-accuracy current-steering D/A converters
Author :
Chen, Tao ; Gielen, Georges
Author_Institution :
ESAT-MICAS, Katholieke Univ., Leuven, Belgium
Abstract :
The SFDR property is one of the most important dynamic properties of a DAC. It is limited by the dynamic nonlinearity errors. For a current-steering DAC, one of the most important nonlinearity errors is the delay differences among the current sources. In this paper, a mathematical model is proposed that explains the impact of delay differences on the SFDR of a thermometic DAC. A formula with clear physical meaning is derived. Simulations show that the formula and behavior level simulations fit very well. These results are also consistent with measurement results from a real chip.
Keywords :
digital-analogue conversion; current-steering DAC; delay difference; dynamic SFDR property; mathematical model; nonlinearity error; thermometic DAC; Clocks; Delay effects; Distortion measurement; Frequency; Mathematical model; Nonlinear distortion; Performance analysis; Propulsion; Sampling methods; Semiconductor device measurement;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1205728
