APT7843

APT7843 Touch Screen Controller Description The APT7843 Touch Screen Controller IC provides all the screen drive , A/D converter and control circuits to easily interface to 4 wire resistive touch screen. The IC continually monitors the screen waiting for a touch. When the screen touched , the IC performs A/D converter to determine the location of touch. Also , this device has 2 auxiliary input to A/D converter , allowing for the measurement of other inputs such as battery voltage. Features 16 pin SSOP or TSSOP Operates with four wire touch screen 8-bit or 12 bit A/D converter Ratiometric Conversion eliminates screen calibration 2 auxiliary analog inputs 4 wire serial interface Full power down control Applications www.DataSheet4U.com PDAs Handheld computer Touch-screen kiosks Pin Assignment +Vcc X+ Y+ XYGND IN3 IN4 1 2 3 4 5 6 7 8 16 15 14 13 12 DCLK CS DIN BUSY DOUT 11 PENIRQ 10 9 +Vcc VREF Order Information APT7843 Temp. Range Package Code Package Code N : SSOP Temp. Range I : - 40 to 85 ° C O : TSSOP ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. Copyright  ANPEC Electronics Corp. Rev. A.8 - Apr., 2002 1 www.anpec.com.tw APT7843 Block Diagram PENIRQ X+ XScreen Driver DCLK CS MUX 12 Bit or 8 Bit A/D Converter Serial Interface Y+ YIN3 IN4 VREF DIN DOUT BUSY Pin Descriptions PIN 1 ...