TY - GEN
T1 - A 2.2 fA/√Hz, 120 dB Dynamic Range, 12 GΩ Hybrid Readout Interface for Various Ionic Spectroscopy Applications
AU - Mostafa, Islam
AU - Korek, Eva Maria
AU - Brederlow, Ralf
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - This paper introduces an ultra-low noise continuous-time (CT) analog front-end (AFE) interface for ionic spectroscopy applications. The proposed readout technique combines magnitude/phase and lock-in architectures over a relatively wide frequency range, from 10 Hz to 100 kHz. This hybrid architecture enables the extension of the overall dynamic range (DR) to 120 dB. The presented AFE has a programmable transimpedance gain of 12 GΩ to cover various kinds of electrochemical impedance sensors. Moreover, the input-referred current noise reaches 2.2 fA/ Hz. This ensures a resolution of 125 fArms in a bandwidth of 2.5 kHz, which corresponds to the desired sensitivity of ionic sensing applications. The proposed readout architecture is implemented in 180 nm CMOS technology. It occupies an area of 0.7 m m2 with a total power consumption equals 3.9 mW from a 1.8 V supply voltage.
AB - This paper introduces an ultra-low noise continuous-time (CT) analog front-end (AFE) interface for ionic spectroscopy applications. The proposed readout technique combines magnitude/phase and lock-in architectures over a relatively wide frequency range, from 10 Hz to 100 kHz. This hybrid architecture enables the extension of the overall dynamic range (DR) to 120 dB. The presented AFE has a programmable transimpedance gain of 12 GΩ to cover various kinds of electrochemical impedance sensors. Moreover, the input-referred current noise reaches 2.2 fA/ Hz. This ensures a resolution of 125 fArms in a bandwidth of 2.5 kHz, which corresponds to the desired sensitivity of ionic sensing applications. The proposed readout architecture is implemented in 180 nm CMOS technology. It occupies an area of 0.7 m m2 with a total power consumption equals 3.9 mW from a 1.8 V supply voltage.
UR - http://www.scopus.com/inward/record.url?scp=85175245524&partnerID=8YFLogxK
U2 - 10.1109/ESSCIRC59616.2023.10268698
DO - 10.1109/ESSCIRC59616.2023.10268698
M3 - Conference contribution
AN - SCOPUS:85175245524
T3 - European Solid-State Circuits Conference
SP - 9
EP - 12
BT - ESSCIRC 2023 - IEEE 49th European Solid State Circuits Conference
PB - IEEE Computer Society
T2 - 49th IEEE European Solid State Circuits Conference, ESSCIRC 2023
Y2 - 11 September 2023 through 14 September 2023
ER -