The STMPE811, from STMicroelectronics (NYSE: STM), is a four-wire resistive touch screen controller. The controller IC offers autonomous functionality to minimize demands on the host processor. For embedded designers, this frees valuable CPU cycles to ease pressures on performance, power consumption and response times. The STMPE811 is the latest member of ST’s S-Touch range of touch-sensor controller solutions optimized for high sensitivity, high integration and low power consumption. The STMPE811 is priced at $0.95 in quantities of 10,000 pieces.
Built-in features include an internal 12-bit ADC for high resolution as well as 128 x 32-bit FIFO data buffers for smooth position tracking. There are also features for accurate position identification and a window-masking function to support multiple sense windows. Special low-power design features achieve active current below 1mA, idle current less than 1 microampere, and an ultra-low-power 150nA hibernation mode.
By combining these functions into a compact 3 x 3mm QFN-16 package, the STMPE811 saves footprint and extends battery lifetime in portable applications such as PDAs, mobile phones, GPS receivers, game consoles, and POS terminals.
More info: STMicroelectronics