Low Pass Filter

I/O1 Xplained Pro features a first order low-pass filter with a cutoff frequency of ~2340Hz. It is realized with a 680Ω resistor and a 100nF capacitor. This filter can be used to filter a PWM generated signal which can be sampled with an ADC pin.

Table 1. Low Pass Filter Connections
Pin on EXT connector Silk screen marking
8 PWM
4 ADC
Parent topic: Peripherals