Finger sensing with high offset level of Sensor Capacitance (100pF)
Anonymous
Not applicable
Jun 08, 2009
02:10 PM
- Subscribe to RSS Feed
- Mark as New
- Mark as Read
- Bookmark
- Subscribe
- Printer Friendly Page
- Report Inappropriate Content
Jun 08, 2009
02:10 PM
Answer:
Question: Can you recognize a finger and exclude other materials of the sensor with an offset level of 100pF?
Response: The CapSense User Module computes a signal called Baseline that tracks the average level of the raw counts. The Baseline provides a reference level that makes it easier to sense small change in
capacitance on top of a large level of fixed sensor capacitance. Although it is possible to sense changes with an offset level of 100pF, it is challenging and not recommended for a first design. The typical upper limit for sensor for a first design is in the range of 60-80pF.
Labels
Rate this article:
Contributors
-
This widget could not be displayed.Anonymous