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

• Fully integrated, lowest power solution

• Low standby current of 0.5µA (typical) at 5.0V

• Active current while converting less than 10 mA

• Resolves 350 dots/inch on 10.5” display

• Maximum speed of 197 points/second

• Ratiometric conversion may eliminate screen calibration

• Automatically wakes up and goes back to standby

• 3.3V or 5V 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

• See the MK715 for a serial interface