Description
The MK712 Touch Screen Controller IC provides all the screen drive, A to D converter and control circuits to easily interface to 4-wire analog resistive touch screens.

Features
• Packaged in 28-pin SSOP (150 mil) or 28-pin SOIC (300 mil)
• Industrial (-30°C to +70°C) and commercial (0 to +70°C) and automotive (-35°C to +85°C) temperature ranges
• Available in Pb (lead) free
• Fully integrated, lowest power solution
• Low standby current of 0.5µA (typical) at 5.0 V
• Active current while converting less than 10 mA
• Resolves 350 dots/inch on 10.5” display
• Maximum speed of 197 points/second
• Ratio metric conversion may eliminate screen calibration
• Automatically wakes up and goes back to standby
• 3.3 V or 5 V supply
• 12 bit A/D converter
• Simplifies the writing of software for touch screens
• Extended temperature range available
• Capacitors are the only external components required
• Touch screen is directly driven - no external transistors are required
• Programmable conversion rate
• A to D Converter is monotonic
• Parallel interface