AD5940/AD5941 Analogue Front End

Analog Devices AD5940/AD5941 High-Precision, Low-Power, and Electrochemical Analogue Front End (AFE) is designed for portable applications that require high precision, electrochemical-based measurement techniques. The AD5940/AD5941 is capable of voltage, current, and impedance measurements and can be used to measure skin impedance, body impedance, and for electrochemical gas sensing. This device consists of two high-precision excitation loops and one common measurement channel that enables a wide capability of measurements of a sensor under test.