Low Power Touch Screen Controller
[AK4185]
AK4185
Low Power Touch Screen Controller with SPI™ Interface
GENERAL DESCRIPTION The AK4185 is a 4-wire/ 5-wire...
Description
[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/...
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