[AK4183]
AK4183
I
2
C Touch Screen Controller
GENERAL DESCRIPTION
The AK4183 is a 4-wire resistive touch screen controller that incorporates SAR type A/D converter. The
AK4183 operates down to 2.5V supply voltage in order to connect a low voltage drive processor. The
AK4183 can detect the pressed screen location by performing two A/D conversions. In addition to
location, the AK4183 also measures touch pressure. As the package size of 10 pin TMSOP is 4.0mm x
2.9mm this is much smaller than QFN and BGA package. AK4183 is the best fit for cellular phone, PDA,
or other portable devices.
FEATURES
12-bit SAR type A/D Converter with S/H circuit
Low Voltage Operation (2.5V
∼
3.6V)
I
2
C bus I/F Supports
(Standard mode 100 KHz, Fast mode 400 KHz)
4-wire resistive touch screen Interface
Pen Pressure Measurement
Auto Power Down
Continuous Read Operation
Low Power Consumption (91μA @Fast mode)
Package
10pin TMSOP
XP
SDA
YP
SCL
Control
Logic
CAD0
XN
YN
PENIRQN
VREF +
AIN+
AIN-
VREF-
12bit
ADC
(SAR type)
PEN
INTERRUPT
VCC
GND
MS0500-E-01
1
2008/12
AKM [ ASAHI KASEI MICROSYSTEMS ]
