MAX11850/MAX11851 MAX11850 MAX11851 -40NC 200VMM MAX11851ETL MAX11850ETM

Two-Touch, Capacitive Touch-Screen Controllers with TacTouchTM Haptic Trigger Output The MAX11850/MAX11851 is a low-power,

XX-XXXX; Rev 0; 5/10 Two-Touch, Capacitive Touch-Screen Controllers with TacTouchTM Haptic Trigger Output The MAX11850/MAX11851 MAX11850/MAX11851 is a low-power, projected capacitive touch-screen controller for use in power-sensitive applications such as handheld devices. Maxim's TacTouchK technology allows haptic feedback to be easily added to the devices. The parts return up to two sets of X, Y, and pressure data to support two-finger multitouch. The devices can be used stand-alone or in conjunction with Maxim's haptic controllers for a low-latency touch and haptics solution. The digital supply range (DVDD) is 1.7 to 1.9V. The analog supply range (AVDD) includes 2.7V to 3.6V, and the digital IO supply range (DVDDIO) is 1.7V to 3.6V. For systems using 1.8V digital supply, DVDD can be connected to DVDDIO, thus reducing board routing and bypass capacitors. The devices contain a multiplexer to interface with the capacitive sensors, analog front-end, ADC, and a serial interface for command and control communications. The 12-bit analog performance of the device provides superior sensitivity and dynamic range, allowing the devices to be mounted on flex or PCB. The devices are suitable for any two-layer or three-layer self-capacitance ITO touch screens. Background calibration allows for cancellation of environmental changes. The parts also contain a dedicated pin for suppression of high-noise events from cell-phone transmits bursts and LCD switching events. The MAX11850 MAX11850 provides support for up to 31 capacitive sensor inputs and the MAX11851 MAX11851 provides support for up to 25 capacitive sensor inputs. The MAX11850 MAX11850 has a SPIK interface and is available in a 48-pin TQFN. The MAX11851 MAX11851 has an I2C interface and is available in a 40-pin TQFN. The package types are specified over the -40NC -40NC to +85NC temperature range. Applications Mobile Communication Devices Features S Supports Self-Capacitance ITO Touch Screens Single and Two Touch S 31 Sensors (MAX11850 MAX11850) or 25 Sensors (MAX11851 MAX11851) ITO Touch Screens Up to 4.3in with 4.5mm ITO Grid Spacing ITO Touch Screens Up to 8.1in with 9.0mm ITO Grid Spacing S 12-Bit Analog Front-End Performance Superior Sensitivity and Dynamic Range Allows Mounting on Flex or PCB Compatible with Any Two-Layer or Three-Layer Self-Capacitance ITO Touch Screen S Scan Disable Pin Reject EMI Events Such as PA Burst and LCD Switching S Self-Calibration, Autodrift Compensation S User-Programmable Modes Scan Rate, Sampling Time, and Number of Samples Adjustable Low-Power Mode Response Time S TacTouch Trigger Output to Haptic Actuator Controller S Comprehensive Postprocessing Data Output Format (X, Y, Z, or Raw Data) User-Defined Touch-Detect Thresholds Region- and Pressure-Dependent Haptics Generation S Low-Power Operation at 3.0V S Available with Industry-Standard, 400kHz I2C Interface or 25MHz Slave-Mode SPI Interface with Active-Low Select S ESD Protection: ±4kV HBM, ±1kV CDM, ±200VMM 200VMM PDAs, GPS, Media Players Ordering Information Portable Instruments POS Terminals TEMP RANGE PINPACKAGE -40NC -40NC to +85NC 48 TQFN SPI MAX11851ETL MAX11851ETL+* TacTouch is a trademark of Maxim Integrated Products, Inc. SPI is a trademark of Motorola, Inc. PART MAX11850ETM MAX11850ETM+* Handheld Games -40NC -40NC to +85NC 40 TQFN I2C INTERFACE +Denotes lead(Pb)-free/RoHS-compliant package. *Future product-contact factory for availability. _ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. MAX11850/MAX11851 MAX11850/MAX11851 General Description Two-Touch, Capacitive Touch-Screen Controllers with TacTouchTM Haptic Trigger Output MAX11850 MAX11850 MAX11851 MAX11851 DVDD DVDD_IO AVDD DOUT REF CSB INTERNAL OSCILATOR AGND DIGITAL CONTROLLER SN25/SN31 SN25/SN31 MUX AFE CLK/SCL DIGITAL INTERFACE ADC DIN/SDA RESETB TIRQB SM2 SDISB SM1 GP0GP3 DGND Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products 25 Maxim is a registered trademark of Maxim Integrated Products, Inc. MAX11850/MAX11851 MAX11850/MAX11851 Block Diagram