MAX11800EWC+T

Overview

The MAX11800EWC+T is a low-power, ultra-small resistive touch-screen controller from Analog Devices/Maxim Integrated. It operates on a single supply of 1.70V to 3.6V and features a 12-bit SAR ADC with a multiplexer for interfacing with resistive touch panels. The device supports the SPI serial bus and includes digital preprocessing to reduce bus loading. It offers direct and autonomous operating modes, data tagging for measurement types, and automatic low-power transitions between conversions.

Feature Summary

• 12-Bit SAR ADC with X/Y coordinate and touch pressure measurement capabilities
• SPI serial interface supporting up to 25MHz clock speeds
• Autonomous mode with on-chip FIFO for automated scanning without host intervention
• Data tagging records measurement type (X, Y, Z1, Z2) and touch events

Applications

• Mobile communication devices
• PDAs and GPS receivers
• Personal navigation devices and media players
• Portable instruments and POS terminals
• Handheld games

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance and lead-free status as indicated by the '+' suffix. Check for automotive qualification if required, noting that standard versions differ from '/V' variants. Ensure compatibility with existing PCB footprints for the 12-pin WLP package.

Selection Notes

Select this model for applications requiring SPI connectivity; note that I2C variants are designated as MAX11801. Consider the 12-pin WLP package dimensions (1.6mm x 2.1mm) for space-constrained designs. Evaluate power consumption requirements against the specified 343µW at 1.7V. Ensure the application processor supports the necessary SPI timing and command structures for direct or autonomous modes.

Part Context

This component belongs to the MAX11800–MAX11803 family of low-power touch-screen controllers. The 'E' indicates an extended temperature range of -40°C to +85°C, while 'WLP' specifies the 12-pin Wafer-Level Package. The '+T' suffix denotes tape-and-reel packaging. Other family members include TQFN packages and I2C-compatible interfaces.

Replacement Considerations

Direct pin-to-pin replacements within the same package include other MAX1180x series parts with compatible interfaces. Verify interface compatibility: MAX11802 uses SPI like the MAX11800, whereas MAX11801/MAX11803 use I2C. Automotive qualified versions are available with the '/V' suffix.