AK4182

www.DataSheet4U.com ASAHI KASEI [AK4182] AK4182 Features: „ 12 bit SAR type A/D Converter with S/H circuit „ Low Voltage Operation (VCC = 2.2V ∼ 3.6V) „ Low Voltage Digital I/F (1.5V ∼ VCC) „ 4-wire I/F „ Sampling Frequency: 125 kHz (max) „ On-Chip Voltage Reference (2.5V) „ Pen Pressure Measurement „ On-Chip Thermo Sensor „ Direct Battery Measurement „ Low Power Consumption (260µA) „ Package 16pin QFN Touch Screen Controller General Description: The AK4182 is a 4-wire resistive touch screen controller that incorporates a 12-bit 125 kHz sampling SAR type A/D converter. The AK4182 operates down to 2.2V supply voltage and supports digital I/O interface voltage from 1.5V to VCC in order to connect low voltage uP. The AK4182 can detect the pressed screen location by performing two A/D conversions. In addition to location, the AK4182 also measures touch screen pressure. On-chip VREF can be utilized for analog auxiliary input, temperature measurement and battery monitoring with the ability to measure voltage from 0V to 5V. The AK4182 also has an on-chip temperature sensor. The AK4182 is available in 16pin QFN thin package (0.75mm in height) and has the operating temperature range of -40°C to +85°C XP DCLK YP Level Shifter Control Logic CSN XN DOUT YN DIN IN VBAT R1 R2 VREF+ AIN+ AINVREF- BUSY Internal VREF(2.5V) IOVDD PENIRQN 12bit ADC (SAR type) PEN INTERRUPT Temp. Sensor VCC VREF GND Block Diagram MS0411-E-00 1 2005/08 DataSheet 4 U .com www.DataSheet4U....