TY - GEN
T1 - A 4 nW 114 dB DR Electrochemical Sensing Interface IC with Digital-Intensive Regulation Loop
AU - Awan, Muhammad Asfandyar
AU - Farooq, Muhammad Haris
AU - Bermak, Amine
AU - Akram, Muhammad Abrar
AU - Wang, Bo
N1 - Publisher Copyright:
© 2026 IEEE.
PY - 2026/5/28
Y1 - 2026/5/28
N2 - This paper introduces an ultra-low-power amplifier-less front-end architecture for amperometric electrochemical sensing. The proposed architecture can simultaneously regulate the potential difference between the required electrodes and perform current readout for an electrochemical sensor. A dual-side potentiostat regulation loop comprising dynamic latched comparators in conjunction with digital loop filters and current-steering DACs is proposed, with its detailed operation discussed in this paper. Implemented in a standard 180 nm CMOS process, this design achieves a current measurement range of 114.3 dB. It can operate over a wide range of sampling frequencies FS (100 Hz ~ 100 MHz) and supply voltages (1 V ~ 1.8 V). The whole interface IC consumes only 3.50 nA current at 1.2 V supply at a clock frequency of 1-kHz.
AB - This paper introduces an ultra-low-power amplifier-less front-end architecture for amperometric electrochemical sensing. The proposed architecture can simultaneously regulate the potential difference between the required electrodes and perform current readout for an electrochemical sensor. A dual-side potentiostat regulation loop comprising dynamic latched comparators in conjunction with digital loop filters and current-steering DACs is proposed, with its detailed operation discussed in this paper. Implemented in a standard 180 nm CMOS process, this design achieves a current measurement range of 114.3 dB. It can operate over a wide range of sampling frequencies FS (100 Hz ~ 100 MHz) and supply voltages (1 V ~ 1.8 V). The whole interface IC consumes only 3.50 nA current at 1.2 V supply at a clock frequency of 1-kHz.
KW - Current readout
KW - electrochemical sensing
KW - low noise
KW - wide dynamic range
UR - https://www.scopus.com/pages/publications/105043504231
U2 - 10.1109/ISCAS66217.2026.11562290
DO - 10.1109/ISCAS66217.2026.11562290
M3 - Conference contribution
AN - SCOPUS:105043504231
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
SP - 4513
EP - 4517
BT - ISCAS 2026 - 2026 IEEE International Symposium on Circuits and Systems
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2026 IEEE International Symposium on Circuits and Systems, ISCAS 2026
Y2 - 24 May 2026 through 27 May 2026
ER -