General Description

The MAX11800–MAX11803 low-power touch-screen controllers operate from a single supply of 1.70V to 3.6V, targeting power-sensitive applications such as handheld equipment. The devices contain 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 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

♦ 25MHz SPI Interface (MAX11800/MAX11802)

♦ 400kHz I2C Interface (MAX11801/MAX11803)

♦ 1.6mm x 2.1mm, 12-Pin WLP and 4mm x 4mm, 12-Pin TQFN

♦ Low-Power Operation 343µW at VDD= 1.7V, 34.4ksps 888µW at VDD= 3.3V, 34.4ksps

♦ ESD Protection ±4kV HBM ±8kV HBM (X+, X-, Y+, Y-) ±1kV CDM ±200V MM

Applications

    Mobile Communication Devices

    PDAs, GPS Receivers, Personal Navigation Devices, Media Players

    Portable Instruments

    POS Terminals

    Handheld Games

    Automotive Center Consoles