White paper: Innovative pressure transmitter signal conditioning with Danfoss QDC™ excitation

Tuesday, August 16, 2022

Danfoss QDC™

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.

You’ll learn about:

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

Download the full white paper