AK4181A Description
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.
AK4181A Key Features
- Sampling Frequency: 125kHz(max)
- 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