AD5940 & AD5941 Analog Front End (AFE)

Analog Devices AD5940 and AD5941 High Precision, Low Power, and Electrochemical Analog Front End (AFE) are designed for portable applications that require high precision, electrochemical-based measurement techniques. The AD5940 and AD5941 are capable of voltage, current, and impedance measurements and can be used to measure skin impedance, body impedance, and 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.