STMPE811QTR – Integrated Circuit – STMicroelectronics

IC SCREEN CNTRL 12BIT 16QFN

STMPE811QTR – 4-Wire Resistive Touch Controller – STMicroelectronics
Experience precise touch input with the STMPE811QTR touch screen controller from STMicroelectronics. Designed for embedded systems requiring reliable human-machine interfaces, this IC delivers 12-bit resolution touch detection with ultra-low 500nA power consumption. Ideal for space-constrained designs, it simplifies integration while extending battery life in portable devices.

Key Features

Touchscreen Type: 4-Wire Resistive Interface
High Resolution: 12-bit ADC Precision
Ultra-Low Power: 500 nA Supply Current
Dual Interface: I2C and SPI Communication
Wide Voltage Range: 1.8V to 3.3V Operation
Robust Design: -40°C to +85°C Operating Temperature
Compact Footprint: 16-QFN (3x3mm) Surface-Mount Package

Technical Details
Part of STMicroelectronics’ S-Touch™ series, the STMPE811QTR integrates all necessary components for resistive touch sensing, including an internal voltage reference. Its 12-bit analog-to-digital converter ensures accurate touch coordinate reporting. The dual I2C/SPI interface provides design flexibility for microcontroller integration. Housed in a space-saving 16-QFN package (3x3mm), this IC meets industrial temperature requirements (-40°C to 85°C) for reliable performance in demanding environments.

Typical Applications

Industrial control panels and HMI systems
Portable medical monitoring devices
Automotive infotainment and dashboard displays
Consumer electronics (e.g., handheld instruments)
IoT devices with touch interfaces

About STMicroelectronics
STMicroelectronics is a global semiconductor leader with over 30 years of innovation in integrated circuits. Renowned for their commitment to quality, STMicroelectronics holds ISO/TS 16949 automotive certification and operates state-of-the-art manufacturing facilities worldwide. Their components are rigorously tested for reliability in industrial, automotive, and consumer applications.
The company invests heavily in R&D, holding thousands of patents for analog, power management, and sensor technologies. STMicroelectronics’ S-Touch™ product line represents industry-leading expertise in human-interface solutions, trusted by major electronics manufacturers for consistent performance and long-term supply chain stability.

About Touch Screen Controllers
Touch screen controllers translate physical touch inputs into digital signals for processing systems. As critical interface components, they determine response accuracy, power efficiency, and noise immunity in touch-enabled devices. Modern controllers like the STMPE811QTR integrate ADC converters, calibration logic, and communication interfaces to minimize external components.
These ICs enable intuitive user interactions across industries—from medical equipment requiring sterile operation to automotive systems needing vibration resistance. Selecting the right touch controller impacts product responsiveness, battery life, and environmental durability. The 4-wire resistive technology in this device offers cost-effective, pressure-sensitive detection suitable for most industrial and consumer applications.

Packaging Options
Available in Tape & Reel (TR) packaging for automated assembly processes. Contact PCX for reel quantities and custom packaging requests.

FAQs
Q: Is the STMPE811QTR compatible with 3.3V microcontrollers?
A: Yes, it operates from 1.8V to 3.3V, making it ideal for 3.3V systems.

Q: Can I use both I2C and SPI interfaces simultaneously?
A: No, the interface is configurable for either I2C or SPI operation.

Q: Does this IC support multi-touch detection?
A: No, this model is designed for single-touch input on 4-wire resistive screens.

Q: What’s the advantage of 12-bit resolution?
A: Higher resolution enables more precise touch coordinate detection for finer control.

Q: How does the ultra-low 500nA current benefit designs?
A: It significantly extends battery life in portable devices during standby/sleep modes.

Q: Can I get technical documentation for