Our new white paper—the third in our series addressing how digitalization and Industry 4.0 impact industrial sensors—unpacks why and how our engineers developed the new Quasi-DC (QDC™) conditioning circuit. Proven to improve both short- and long-term stability, signal-to-noise ratio, and EMC immunity, QDC™ signal conditioning enables us to develop extremely stable, reliable, and high-quality pressure transmitters.
From mobile hydraulic to industrial engine applications, Micro Electro-Mechanical System (MEMS) and Thinfilm piezoresistive Wheatstone bridge technology is widely used in pressure sensors—the measurement systems of which are often challenged by factors like zero-point drift, 1/f noise, and increasing restrictions around EMC and reliability.
The newly-designed Danfoss Quasi-DC (QDC™) conditioning circuit helps us achieve the utmost transmitter accuracy by minimizing the compensation effort using a mathematical high-order polynomial compensation—and reducing or even eliminating some of the part-to-part variations often associated with analog solutions.
In this white paper, we take a closer look at the challenges that drove our engineers to develop this new technology—and how QDC™ excitation is proven to boost the stability, reliability, and EMC immunity of industrial pressure transmitters.
Piezoresistive MEMS and Thinfilm pressure sensors
Challenges faced by MEMS and Thinfilm sensors
Danfoss patented QDC™ implementation
How QDC™ was tested and proven to deliver on quality and performance