MAX11800ETC+T

Overview

The MAX11800ETC+T is a low-power resistive touch-screen controller manufactured by Analog Devices Inc./Maxim Integrated. It integrates a 12-bit SAR ADC and multiplexer to interface with 4-wire resistive panels, operating from a single 1.7V to 3.6V supply. The device supports SPI serial communication and features digital preprocessing to reduce bus loading. It includes autonomous and direct operation modes, data tagging for measurement context, and programmable touch-detect pullup resistors. Power consumption is specified at 343µW at 1.7V and 34.4ksps. The component is housed in a 12-pin TQFN package with an exposed pad.

Feature Summary

• 12-Bit SAR ADC with integrated multiplexer for X/Y coordinate and pressure measurements
• 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 event status

Applications

• Mobile communication devices
• PDAs, GPS receivers, and personal navigation devices
• Portable instruments and POS terminals
• Handheld games and automotive center consoles

Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging and the '+' suffix confirms lead-free/RoHS compliance. Confirm the 'ETC' designation corresponds to the -40°C to +85°C temperature range and 12-pin TQFN-EP package. Check current availability as this series may be subject to discontinuation notices.

Selection Notes

Select the MAX11800 variant specifically for SPI interface requirements; other family members like MAX11801 use I2C. Ensure the application requires 4-wire resistive panel support rather than capacitive sensing. Verify that the 1.7V to 3.6V supply range aligns with the system power architecture.

Part Context

This part belongs to the MAX11800–MAX11803 family of ultra-small resistive touch-screen controllers. The MAX11800ETC+T is distinguished by its SPI interface and TQFN packaging. Other variants in the family include MAX11801/03 with I2C interfaces and MAX11800GTC/V+ for automotive temperature ranges.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.