![]() ![]() This DAC is capable of generating high frequency excitation signals up to 200 kHz. ![]() The second excitation loop consists of a 12-bit DAC, referred to as the high speed DAC. This low power excitation loop is capable of generating signals from dc to 200 Hz. One output of the DAC controls the noninverting input of the potentiostat, and the other output controls the noninverting input of the transimpedance amplifier (TIA). ![]() The first excitation loop consists of an ultra low power, dual-output string, digital-to-analog converter (DAC), and a low power, low noise potentiostat. The AD5940/AD5941 consist of two high precision excitation loops and one common measurement channel, which enables a wide capability of measurements of the sensor under test. The AD5940/AD5941 is designed for electrochemical toxic gas sensing. The AD5940/AD5941 is designed for skin impedance and body impedance measurements, and works with the AD8233 AFE in a complete bioelectric or biopotential measurement system. The AD5940 and AD5941 are high precision, low power analog front ends (AFEs) designed for portable applications that require high precision, electrochemical-based measurement techniques, such as amperometric, voltammetric, or impedance measurements. ![]()
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