Title :
A 14-bit D/A-converter with digital calibration
Author_Institution :
Nokia Res. Center, Helsinki
Abstract :
A 14-bit digitally calibrated segmented current-steering D/A-converter is presented. The 6-bit MSB-subconverter part of the DAC is formed by using two MSB arrays in parallel. The switching order of the MSB current sources is optimized with programmable mapping devices so that the current deviations of the current sources in the first array are compensated with their complementary errors in the second array. The implemented D/A-converter achieves 83.5dBc of SFDR with a 1.6MHz, -0.5dBFS signal and a clock rate of 100Msamples/s. With -0.3dBFS signal swing the calibrated DNL and INL are 0.9LSB and 1.5LSB, respectively. The DAC consumes less than 60mW at 1.2/2.5V power supply with the sample rate of 100MSPS. The silicon area of the DAC is 0.65mm2. The chip was fabricated in 0.13mum CMOS process
Keywords :
CMOS integrated circuits; constant current sources; digital-analogue conversion; 0.13 micron; 1.2 V; 1.6 MHz; 14 bit; 2.5 V; CMOS process; MSB arrays; current sources; current-steering converter; digital calibration; digital-analogue converter; programmable mapping devices; switching order; CMOS process; CMOS technology; Calibration; Clocks; Communication switching; Current measurement; Decoding; Linearity; Power supplies; Silicon;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1692534
