Title :
Integrated capacitive-sensor interface based on a multi-slope modulator
Author :
Nihtianov, Stoyan ; Yao Cheng
Author_Institution :
Electron. Instrum. Lab., Delft Univ. of Technol., Delft, Netherlands
Abstract :
This paper presents an energy-efficient capacitive sensor interface based on a multi-slope analog-to-digital converter (ADC). The interface utilizes precision resistor and time as references. By using a multi-slope analog-to-digital converter, the conversion time of this multi-slope modulator is reduced down to 50us. The counter works as a sinc filter to reduce the noise, which helps to achieve a resolution of 14.5 bits for 250 Hz signal bandwidth.
Keywords :
analogue-digital conversion; capacitive sensors; filters; modulators; resistors; ADC; bandwidth 250 Hz; energy-efficient integrated capacitive sensor interface; multislope analog-to-digital converter; multislope modulator; noise reduction; precision resistor; sinc filter; time 50 mus; word length 14.5 bit; Capacitors; Generators; Noise; Power demand; Resistors; Temperature measurement; Thermal stability; Capacitance-to-digital converter; multi-slope analog-to-digital converter; precision resistor; sinc filter;
Conference_Titel :
Industrial Technology (ICIT), 2013 IEEE International Conference on
Conference_Location :
Cape Town
Print_ISBN :
978-1-4673-4567-5
Electronic_ISBN :
978-1-4673-4568-2
DOI :
10.1109/ICIT.2013.6505802
