External Filtering at MAX34407 Sense Inputs. In applications where there is significant noise present on a monitored supply rail, it is recommended to use a small capacitor at the IN+ and IN- pin for each channel. Values of 0.1uF are usually sufficient. The MAX34407 evaluation kit provides a good design example for layout and placement of these capacitors, although they are not populated by default. Additionally, there are pads for series resistors to form a low pass filter with the capacitors, and these are populated with 0 Ohm resistors. Following the evaluation kit example by including the filter pads ensures that external filtering can be added easily to optimize final designs.