S-TouchTM
Ultra-low-power solution for touch sensing
To address the rapidly growing market of low-power
touch user interface, ST has introduced S-Touch, a new range of touch sensor
controllers that offer simple and highly-efficient solutions
for capacitive and resistive touch-sensor functions in ultra small
packages.
S-Touch implements highly innovative signal processing techniques
for both capacitive and resistive technology to correctly detect,
process and pass the touch information to the CPU.
In addition, the sensor lines from the device to the
application's touch pads do not require any external RC (resistor
capacitor) networks which are typically required in other solutions,
resulting in a highly cost-competitive solution.
S-Touch resistive touchscreen controllers use a 4-wire resistive
methodology with built-in ADCs to offer both ease of design and greater
flexibility to touchscreen applications.
Capacitive S-Touch
controllers
S-Touch capacitive touchkey controllers use a hardwired finite
state machine approach with fully digital architecture. This results
in very low power consumption, five to ten times lower than the
conventional touch sensor solution, and ultra fast sampling time,
typically 2 ms. S-Touch capacitive touchkey controllers are suitable
for a wide range of touchkey sensing applications, such as keypads,
rotators or buttons.
