应用功能： The AD7745/AD7746 are a high resolution, ∑-Δ capacitance-to-digital converter(CDC).Thecapacitance to be measured is connected directly to the device inputs. The architecture fea-tures inherent high resolution (24-bit no missing codes, up to 21-bit effective resolution), high linearity (±0.01%), and high accuracy (±4 fF factory calibrated).
