Frequently Asked Question
Can I cascade, serialize, or parallel multiple digital potentiometers to get the resistance or resolution I need? My requirement is for a 250 Ω digital potentiometer with approximately 1 Ω/step. I plan to use four 1 kΩ AD8403 in parallel with each set to nominally the same value.
Yes, see the application note AN-582 "Resolution Enhancements of Digital Potentiometers with Multiple Devices."