MAX11800ETC+

Overview

The MAX11800ETC+ is a low-power, ultra-small resistive touch-screen controller manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single 1.7V to 3.6V supply 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 (X, Y, Z1, Z2) and touch events, and programmable touch-detect pullup resistors. Power consumption is 343µW at 1.7V and 34.4ksps. It is available in a 12-pin TQFN-EP package.

Feature Summary

• 12-Bit SAR ADC with Multiplexer
• SPI Serial Interface (MAX11800/MAX11802)
• Direct and Autonomous Operating Modes
• Data Tagging for Measurement and Touch Events
• Low-Power Operation (343µW at 1.7V)

Applications

• Mobile Communication Devices
• PDAs, GPS Receivers, Personal Navigation Devices, Media Players
• Portable Instruments
• POS Terminals
• Handheld Games

Procurement Notes

Verify the component's authenticity and check for RoHS compliance status. Confirm the package type is 12-TQFN-EP and ensure the temperature range matches the -40°C to +85°C specification. Cross-reference the part number with official manufacturer documentation to avoid counterfeit products.

Selection Notes

Select the MAX11800ETC+ when an SPI interface is required for resistive touch screens. Consider the autonomous mode for power-sensitive applications where the host processor needs to remain idle during touch detection. Ensure the system voltage falls within the 1.7V to 3.6V range and that the 12-pin TQFN package fits the PCB layout constraints.

Part Context

The MAX11800ETC+ belongs to the MAX11800–MAX11803 family of low-power touch-screen controllers. This series shares core functionalities such as the 12-bit SAR ADC and digital preprocessing but differs in communication interfaces. While the MAX11800 and MAX11802 support SPI, the MAX11801 and MAX11803 utilize I2C. All variants offer similar power-saving features and are designed for portable electronics.

Replacement Considerations

For systems requiring an I2C interface instead of SPI, consider the MAX11801ETC+. If automotive qualification (-40°C to +105°C) is needed, the MAX11800GTC/V+ is a suitable alternative within the same package.