General Description

The MAX11811 low-power touch-screen controller operates from a 1.7V to 3.6V single supply targeting powersensitive applications such as handheld equipment. The device contains a 12-bit SAR ADC and a multiplexer to interface with a resistive touch-screen panel. A digital serial interface provides communications.

Features

♦ 4-Wire Touch-Screen Interface

♦ X/Y Coordinate Measurement and Touch Pressure

   Measurement

♦ Ratiometric Measurement

♦ 12-Bit SAR ADC

♦ Single 1.7V to 3.6V Supply

♦ Two Operating Modes—Direct and Autonomous

♦ Data Tagging Provides Measurement and Touch

   Event Information

♦ Data Filtering Provides Noise Reduction

♦ Aperture Mode Provides Spatial Filtering

♦ Digital Processing Reduces Bus Activity and

   Interrupt Generation

♦ Programmable Touch-Detect Pullup Resistors

♦ Auto Power-Down Control for Low-Power

   Operation

♦ General-Purpose Current DAC Output

♦ General-Purpose Input

♦ Integrated Proximity Sensing System

♦ Integrated Motor Haptic Driver*

♦ PWM Output for MAX11835 Haptic Piezo

   Controller† (HPC)

♦ 400kHz I2C Interface

♦ 20-Pin, 4mm x 4mm TQFN

♦ Low-Power Operation

   250µW at VDD = 1.7V, 34.4ksps

♦ ESD Protection

   Q8kV HBM (X+, X-, Y+, Y-)

Applications

   Mobile Communication Devices

   PDA, GPS Receivers, Personal Navigation

   Devices, Media Players

   Digital Still Camera

   Digital Video Camera

   Digital Photo Frame

   POS Terminals and Financial Terminals

   Handheld Games

   Automotive Center Consoles