06004139

j

06004139 Seker\'ak, Martin Michaeli, Linus \v{S}aliga, J\'an Godla, Marek Dynamic dac testing by registration of the input code wordin equality when the dac output matches a reference signal. Acta Electrotech. Inform. 11, No. 3, 31-35 (2011). 2011 Faculty of Electrical Engineering and Informatics, Technical University of Ko\v sice, Ko\v sice; Versita, Warsaw EN digital to analog converter (DAC) dithering DNL INL comparator

doi:10.2478/v10198-011-0027-6

Summary: The characterization of high resolution Digital to Analog Converter (DAC) involves new problems caused by their high performance. This paper presents a new method for measuring the characteristics of high resolution DACs under dynamic condition. The main principle of the proposed method is the conversion of the DAC analog output voltage to a digital code. The one that is corresponding to the equality of the DAC output voltage and reference signal by using a fast comparator, a dithering DAC and an accurate dc voltmeter. The output of the comparator is used as the control signal to register the digital input code word of the DAC in a fast memory. After digital processing the registered record of digital code words is used to determine the Integral-nonlinearity (INL) and Differential-nonlinearity (DNL) of the DAC under test.