|Applications||Replacement of mechanical buttons with capacitive inputs (both in consumer products or industrial instrumentation)|
|On-board modules||SEMTECH SX8633|
|Key Features||12 pins for connecting capacitive inputs, 8 GPIO pins|
|Key Benefits||Can be used for proximity sensing as well as capacitive buttons, Capable of sensing through overlay materials (up to 5mm thick)|
|Click board size||M (42.9 x 25.4 mm)|
The SX8633 IC has a 10 bit ADC and up to 100pF offset capacitance compensation at full sensitivity. This high resolution enable it to support a wide variety of touch pad sizes and shapes to be used with the click. An overlay material up to 5mm thick can also be used, simplifying integration.
The 8 GPIO pins on Cap Extend click can be used as LED drivers. An interesting application that combines capacitive sensing with LED drivers is to have LEDs that slowly fade in as a user’s finger approaches.
The LED fading effect can be initiated using the SX8633 autolight mode.