Can components on my Printed Circuit Board (PCB) bring some perturbation to onboard magnetic sensors?
Yes, Many components contain ferrous materials. Nickel plating is the most common culprit and is present on lead frames of integrated circuits and solder end caps of surface mount components. Other components such as power transistors may have packages with large amounts of iron in the heat spreading elements. Also beware of the location of NiCd (Nickel-Cadnium) batteries, and speaker/microphone elements using permanent magnets. A good rule of thumb to use is to keep adjacent components at least two end cap lengths away from the magnetic sensor components. This also applies to parts that may be placed on the opposite side of the printed circuit board. For example, a 0603 capacitor with its 30mil end caps should be at least 60mils away from the magnetic sensors.
Related Questions
- Is the implementation of EBG structures into printed circuit boards something that can be done with standard PCB design and assembly processes, or would a new tool set need to be developed?
- What is often cited as the most difficult frequency range to suppress noise at the printed circuit board (PCB) level?
- Can components on my Printed Circuit Board (PCB) bring some perturbation to onboard magnetic sensors?
