32-Position Manual Up/Down Control
Potentiometer
AD5228 Data Sheet
FEATURES FUNCTIONAL BLOCK DIAGRAM APPLICATIONS
Mechanical potentiometer and trimmer replacements
LCD backlight, contrast, and brightness controls
Digital volume control
Portable device-level adjustments
Electronic front panel-level controls
Programmable power supply GENERAL DESCRIPTION
The AD5228 is Analog Devices' latest 32-step-up/step-down
control digital potentiometer emulating mechanical potentiometer operation1. Its simple up/down control interface allows
manual control with just two external pushbutton tactile
switches. The AD5228 is designed with a built-in adaptive
debouncer that ignores invalid bounces due to contact bounce
commonly found in mechanical switches. The debouncer is
adaptive, accommodating a variety of pushbutton tactile
switches that generally have less than 10 ms of bounce time
during contact closures. When choosing the switch, the user
should consult the timing specification of the switch to ensure
its suitability in an AD5228 application. D
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