KLT1C20DC6

[AK4185] AK4185 Low Power Touch Screen Controller with SPI™ Interface GENERAL DESCRIPTION The AK4185 is a 4-wire/ 5-wire resistive touch screen controller that incorporates 12bit SAR A/D converter. The AK4185 operates down to 1.6V supply voltage in order to connect a low voltage microprocessor. The AK4185 has both an automatic continuous measurement and a measurement data calculation function. The functions that normally require external processing, such as calculating the average screen input value, are processed by the AK4185. In addition, a new sequential mode achieves short coordinate measurement time while greatly reducing the microprocessor overhead. The AK4185 can detect the pressed screen location by performing two A/D conversions and it can also measure touch pressure. The AK4185 is the best fit for cellular phone, DSC, DVC, smart phone, or other portable devices. FEATURES 4-wire or 5-wire Touch Screen Interface SPITM Serial Interface 12bit SAR A/D Converter with S/H circuit Sampling Rate: 300Ksps Pen Pressure Measurement (4-wire) Continuous Read Function (External Clock Mode) Integrated Internal Osc (Sequence Mode) Integrated Median Averaging Filter Low Voltage Operation: VDD = 1.6V ~ 3.6V PENIRQN Buffer Output Low Power Consumption: 240μA at 1.8V Auto Power Down Package: 12pin CSP (1.96mm x 1.46mm, pitch 0.5mm) Software Compatible with AK4182A VDD „ „ „ „ „ „ „ „ „ „ „ „ „ „ XP/BR YP/TR XN/TL YN/BL IN/ WIPER TEMP Internal Osc CSN 4/5wire Touch Screen Drivers In...