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.

特性 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