Title :
Compact FPGA-based elaboration platform for wide-bandwidth electrochemical measurements
Author :
Carminati, Marco ; Rottigni, Angelo ; Alagna, Diego ; Ferrari, Giorgio ; Sampietro, Marco
Author_Institution :
Dipt. di Elettron. e Inf., Politec. di Milano, Milano, Italy
Abstract :
A novel mixed-signal generation, acquisition and elaboration motherboard for electrochemical sensing is presented. This compact USB-controlled instrument is based on a FPGA for fast real-time execution of multiple measurement families: amperometry, voltammetry and impedance spectroscopy in particular. A digital dual-phase lock-in demodulator based on an internal DDS/PLL has been embedded with a custom analog front-end to provide an extended frequency range up to 10MHz. The design and experimental characterization of the full instrument encompassing fast (14bit, 80MSa/s) and auxiliary precise (18bit, 100kSa/s) channels are here discussed.
Keywords :
amperometric sensors; chemical variables measurement; direct digital synthesis; field programmable gate arrays; peripheral interfaces; phase locked loops; voltammetry (chemical analysis); amperometry; compact FPGA-based elaboration platform; compact USB-controlled instrument; digital dual-phase lock-in demodulator; elaboration motherboard; electrochemical sensing; impedance spectroscopy; internal DDS-PLL; mixed-signal generation; voltammetry; wide-bandwidth electrochemical measurements; word length 14 bit; word length 18 bit; Bandwidth; Field programmable gate arrays; Impedance; Impedance measurement; Instruments; Low pass filters; Universal Serial Bus; USB potentiostat; digital lock-in; impedance spectroscopy;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC), 2012 IEEE International
Conference_Location :
Graz
Print_ISBN :
978-1-4577-1773-4
DOI :
10.1109/I2MTC.2012.6229507
