Keyless Entry Keypad Switch
Keyless Entry Keypad Switch
Stoneridge capacitive switch solutions use a change in capacitance from human touch to activate switch functions in all manner of keypad or push-button applications. Tru-Sense™ uses a dual electrode design and patented software algorithms coupled with single chip control ensure design flexibility and economies of scale for multi-switch applications. Stoneridge technology enables the switch to function reliably under adverse environmental conditions such as rain, ice, dirt, dust, chemicals and mechanical shock.
Features and benefits
- Self-calibrating algorithm – Allows switch activation from human touch in presence of changing dielectric environment (e.g. temperature/humidity/moisture)
- Adjacent key suppression
- Anti-Swipe Technology
- Temperature range: -40 to 85° C
- Non-contact – Requires no moving parts
- PCB based technology – depth of switch dependent on component height, surface geometry, connector location; PCB could be placed adjacent or remotely to capacitive traces
- Low current draw: ex. Quiescent 250uA / 4mA active
- Switch points are electrode/trace based versus multiple individual switches or capacitive chips
- Flexible substrate
- Environmental sealing – can be fully encapsulated or sandwiched between layers
- Allows use of multiple conductive materials for traces, e.g. clear conductive ink
Typical applications
Exterior
- Replace less durable mechanical and membrane switches for trunk release and passive entry door handles
- PIN Pad keyless entry pads
- Active badge/emblem switches
Interior
- Ignition switch (PIN Pad)
- Headlight switches
- Door panel mounted controls
- Overhead console
- Glove box button