IQS227B00400008TSR
Overview
The IQS227B is a single-channel capacitive touch and proximity sensor designed for high-performance detection in space-constrained applications. It features an integrated LED driver and utilizes an I2C interface for configuration and data retrieval, supporting supply voltages from 1.8V to 3.6V. This sensor is particularly effective for implementing robust touch buttons or proximity-activated wake-up features while maintaining an ultra-low power footprint.
Why Choose This Part
The device excels in power efficiency, consuming as little as 2.5uA in its lowest power mode while still providing reliable detection. Its TSOT-23-6 package provides a small surface-mount footprint with a built-in LED driver, simplifying the Bill of Materials by removing the need for external transistor drivers for status indicators. The internal signal processing provides high sensitivity for proximity detection through thick overlays.
Applications
Key Specifications
Getting Started
To evaluate the IQS227B, connect the I2C bus to a microcontroller such as an ESP32 or STM32 and monitor the status registers for touch or proximity events. Use the Azoteq IQS227B evaluation kit and the associated configuration software to tune sensitivity thresholds and power modes. Ensure the electrode design follows Azoteq's layout guidelines for optimal parasitic capacitance management.
