For capacitive touch key applications, both QST and S-Touch
families of products offer the following benefits:
- full digital architecture and smart functions
- extremely tolerant to environmental changes
- advanced automatic calibration Adjacent “touched
key” determination mechanism
- low external component – small footprint
- low power consumption
- reliable technologies
- operating voltage: 1.8 - 5.5 V
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 The QST
family of products uses a pure digital, firmware-based solution
that implements Quantum's patented and field-proven charge-transfer
QProx™ capacitive technology. Key features are:
- QTouch™ technology for simple touch panels of up to
12 keys
- QMatrix™ technology for high key counts in small packages
- support for any combination of buttons, wheels and sliders
- advanced processing techniques such as drift compensation,
auto-calibration, and noise filtering
- adjacent key suppression (AKS™) to ensure maximum useability
and control integrity
- multifunction capabilities for contemporary user interfaces
 S-Touch's
finite state machine (FSM) architecture uses a dedicated and complete
IC approach with its own distinctive features for a fast time-to-market
solution.
- robust and sensitive capacitance detection engine based on
differential capacitance measurement
- design flexibility using configurable automatic impedance calibration,
adjustable touch variance and environmental variance for optimized
calibration
- direct user access to program the instruction sets and parameter
settings
- very fast IC sampling time (typically 2 ms) ensured by an optimized
FSM architecture
- innovative processing techniques to enhance user control:
- advanced data filtering (AFS)
- environmental tracking calibration (ETC)
- touch sensor solution with very low power consumption (typically
5 µA per key)
- ultra small packages for low key devices (QFN16 - 2.6 x 1.8
mm for 8 channels)
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Touch Sensor Families |
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