2D Analog Resistive Touch
Legacy Analog Resistive Touch Solutions
Introduction to Resistive Touch
Analog resistive technology is popular because of its:
- Low-cost sensors
- Acceptance of finger, glove or stylus-pen inputs
- Overall ease of manufacturing and integration into applications
Suitable applications for analog resistive include:
- Mobile phones, industrial automation, retail point-of-sale, gaming/entertainment and automobile navigation systems
How Does Resistive Touch Work?
An analog resistive touch screen is comprised of two layers, the flex and the stable layer. These layers are coated with a thin electrically conductive coating of Indium Tin Oxide (ITO). These two layers are separated by the spacer layer. When touched, the flex layer comes in contact with the stable layer. The point of contact creates a voltage divider in the X and Y directions. This voltage is then used to find the relative position of the touch activation.
Selecting a Touch Sensor
There are three basic analog resistive sensor constructions:
- Most cost effective: 4-wire
- Most durable: 5-wire
- Most flexible: 8-wire
AR1000 Series Touch Controllers
- Turnkey touch solution
- Built-in decoding and advanced filtering
- Controller-driven calibration
- Low cost with few external components
- Universal 4-, 5- and 8-wire support
- Fast time to market
- Small footprint
- Low power
- SPI, I2C, UART support
Driver and Design Support
For support please contact the Microchip support ticket system.
Please contact Touch-Base to request an UPDD touchscreen driver installer for ongoing system maintenance or to align purchasing UPDD drivers.
You can also download seven-day trial drivers for AR1xxx controllers.