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MAX11801EWC+T Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX11801EWC+T Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 / 56 page  General Description The MAX11800–MAX11803 low-power touch-screen con- trollers operate from a single supply of 1.70V to 3.6V, tar- geting 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. The MAX11800–MAX11803 include digital preprocessing of the touch-screen measurements, reducing bus loading and application-processor resource requirements. The included smart interrupt function generator greatly reduces the frequency of interrupt servicing to the devices. The MAX11800–MAX11803 enter low-power modes automatically between conversions to save power, making the devices ideal for portable applications. The MAX11800/MAX11801 offer two modes of operation: direct and autonomous. Direct mode allows the applica- tion processor to control all touch-screen controller activ- ity. Autonomous mode allows the MAX11800/MAX11801 to control touch-screen activity, thereby freeing the application processor to perform other functions. In autonomous mode, the devices periodically scan the touch screen for touch events without requiring host- processor intervention. This can be used to reduce sys- tem power consumption. An on-chip FIFO is used during autonomous mode to store results and increase effective data throughput and lower system power. The MAX11800–MAX11803 support data-tagging, which records the type of measurement performed; X, Y, Z1, or Z2, and the type of touch event; initial touch, continuing touch, or touch release. The MAX11800/MAX11802 support the SPI™ serial bus. The MAX11801/MAX11803 support the I2C serial bus. The MAX11800–MAX11803 are available in 12-pin TQFN and 12-pin WLP packages, and are specified over the -40°C to +85°C (extended) and -40°C to +105°C (auto- motive) temperature ranges. Applications 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 Low-Power, Ultra-Small Resistive Touch-Screen Controllers with I2C/SPI Interface ________________________________________________________________ Maxim Integrated Products 1 Ordering Information 19-4711; Rev 0; 7/09 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. PART TEMP RANGE PIN-PACKAGE MAX11800ETC+ -40°C to +85°C 12 TQFN-EP** MAX11800GTC/V+ -40°C to +105°C 12 TQFN-EP** MAX11800EWC+T* -40°C to +85°C 12 WLP MAX11801ETC+ -40°C to +85°C 12 TQFN-EP** MAX11801GTC/V+ -40°C to +105°C 12 TQFN-EP** MAX11801EWC+T* -40°C to +85°C 12 WLP MAX11802ETC+T -40°C to +85°C 12 TQFN-EP** MAX11802EWC+T* -40°C to +85°C 12 WLP MAX11803ETC+T -40°C to +85°C 12 TQFN-EP** MAX11803EWC+T* -40°C to +85°C 12 WLP Typical Operating Circuits and Pin Configurations appear at end of data sheet. * Future product—contact factory for availability. ** EP = Exposed pad. + Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. /V denotes an automotive qualified part. Mobile Communication Devices PDAs, GPS Receivers, Personal Navigation Devices, Media Players Portable Instruments POS Terminals Handheld Games Automotive Center Consoles SPI is a trademark of Motorola, Inc. † Patents pending. |
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