AK4181A

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 (250A)
Low Voltage Operation (2.7V - 3.6V)
Package 16pin TSSOP


Pinout




Specifications

GND=0V (Note 1)

Parameter	Symbol	min	max	Units
Power Supplies	VCC	−0.3	6.0	V
Input Current, Any Pin Except Supplies	IIN	-	±10	mA
Input Voltage	VIN	-0.3	6.0(VCC+0.3)	V
Touch Panel Drive Current	IOUTDRV	-0.3	50	mA
Ambient Temperature (powered applied)	Ta	-20	70	°C
Storage Temperature	Tstg	-65	150	°C

Note 1.All voltages with respect to ground.


Description

The AK4181A is a 4-wire touch screen controller that incorporates a 12-bit 125kHz sampling SAR A/D converter.It 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. It also has an on-chip temperature sensor.