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ASAHI KASEI [AK4182]
AK4182
Features: 12 bit SAR type A/D Converter with S/H circuit Low Voltag...
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
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