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Touch Screen Controller
The AK4181A is a 4-wire touch screen controller that incorporates a 12-bit 125kHz sampling SAR A/D converter. The AK4181A can detect the pressed screen location by performing two A/D conversions. In addition to location, the AK4181A also measures touch screen pressure. On-chip VREF can be utilized for two analog auxiliary inputs and battery monitoring, with the ability to measure voltages from 0V to 5V. The AK4181A also has an on-chip temperature sensor.
• Pen Pressure Measurement
• On-Chip Thermo Sensor
• Two Auxiliary Analog Inputs
• Direct Battery Measurement
• 4-wire I/F
• On-Chip Voltage Reference (2.5V)
• 12 bit SAR type A/D Converter with S/H circuit
• Low Power Consumption (250µA)
• Low Voltage Operation (2.7V - 3.6V)
• Package 16pin TSSOP
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