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 controlApplication• PDAs&...
APT7843: 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...
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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.