MAX11811ETP+T

Overview

The MAX11811ETP+T is a low-power, ultra-small resistive touch-screen controller with an integrated haptic driver. It operates from a single 1.7V to 3.6V supply and features a 12-bit SAR ADC for X/Y coordinate and pressure measurement. The device supports I2C serial communication at up to 400kHz and offers direct and autonomous operating modes. Autonomous mode utilizes an on-chip FIFO to reduce host processor intervention and system power consumption. It includes digital preprocessing, data tagging, and noise filtering capabilities. The component is housed in a 20-pin, 4mm x 4mm TQFN package and is specified over the extended industrial temperature range of -40°C to +85°C.

Feature Summary

• 12-Bit SAR ADC with 4-Wire Touch-Screen Interface
• Integrated Haptic Driver with PWM Output for Piezo Controllers
• Autonomous Mode with On-Chip FIFO for Reduced Bus Activity
• Low-Power Operation: 250µW at VDD = 1.7V, 34.4ksps

Applications

• Mobile Communication Devices
• PDA, GPS Receivers, Personal Navigation Devices, Media Players
• Digital Still Camera and Digital Video Camera
• POS Terminals and Financial Terminals
• Automotive Center Consoles

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm the manufacturer designation as Analog Devices Inc./Maxim Integrated. Ensure compatibility with the 20-TQFN (4x4) footprint during procurement planning.

Selection Notes

Select this component for applications requiring integrated resistive touch sensing and haptic feedback control within a small form factor. Choose the ETP+ variant for standard industrial temperature ranges (-40°C to +85°C). Consider the autonomous mode features if minimizing application processor load is a priority.

Part Context

This part belongs to the TacTouch family of touch-screen controllers. It integrates proximity sensing and motor haptic driving capabilities alongside standard touch functions. The ETP+ designation specifies the 20-pin TQFN package and industrial temperature rating, distinguishing it from automotive variants like the GTP/V+.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical specifications against potential alternatives before implementation.