User Guide

Note on using filtered PWM in Analog
Mode
If you are using a filtered PWM signal from a
microcontroller to generate the analog voltage, an R/C filter
with component values 10k ohms and at least .1uf is
recommended as shown in Figure 4.1. Using a larger value
filter capacitor such as 1uf or 10uf will result in smoother
motor operation, at a cost of slower transient response. A PWM frequency higher than 1000Hz is
recommended.
Figure 4.1: Filtered PWM