[ASAHI KASEI]
[AK4180]
AK4180
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
Low Power Consumption (250µA)
µ
Low Voltage Operation (2.7V - 3.6V)
Package
16pin TSSOP
Touch Screen Controller
General Description:
The AK4180 is a 4-wire touch screen controller that incorporates
a 12-bit 125kHz sampling SAR A/D converter. The AK4180 can
detect the pressed screen location by performing two A/D
conversions. In addition to location, the AK4180 also measures
touchscreen 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 AK4180 also has an on-chip temperature sensor.
XP
DCLK
CSN
YP
DIN
XN
Control
Logic
DOUT
BUSY
YN
IN1
Internal
VREF(2.5V)
VREF
IN2
VBAT
R1
AIN+
VREF+
VREF-
R2
12bit
ADC
AIN-
(SAR type)
PENIRQN
PEN
INTERRUPT
Temp.
Sensor
VCC
GND
Block Diagram
<MS0195-E-01>
1
2003/02
AKM [ ASAHI KASEI MICROSYSTEMS ]
