IQS7211E002QFR

Overview

The IQS7211E002QFR is a capacitive touch and proximity trackpad controller from Azoteq's ProxSense series, housed in a QFN20 package. It supports up to 13 external sensor pad connections with self- or mutual-capacitive configurations. The device features automatic tuning, low power proximity detection, and single finger gesture recognition. It operates on a supply voltage of 1.8 V to 3.5 V and communicates via an I2C interface supporting speeds up to 1 MHz. The component provides high-resolution coordinate outputs at rates up to 100 Hz and includes integrated noise filtering and water immunity features.

Feature Summary

• Supports flexible sensor configurations including self- and mutual-capacitive modes for display wake-up.
• Features ultra-low power wake-up capabilities using dedicated sensors or the main trackpad.
• Includes an integrated single finger gesture recognition engine and automatic sensor tuning.
• Provides high-resolution coordinate tracking with fast response rates and integrated touch size output.

Applications

• Fitness bands
• True Wireless Stereo (TWS) earbuds
• Game controller touch pads
• Headphones

Procurement Notes

Verify the specific ordering suffix 'QFR' corresponds to the QFN20 package variant when sourcing. Confirm that the pre-programmed settings align with the intended application requirements, as the device supports auto-run from programmed settings. Ensure compatibility with the required I2C bus speed and voltage levels during integration planning.

Selection Notes

Select this model for applications requiring a compact footprint with integrated gesture processing. The QFN20 package offers 13 sensor connections, suitable for smaller trackpad layouts. Consider the internal voltage regulator and automatic tuning features if minimizing external components and production calibration steps is a priority.

Part Context

This component belongs to the IQS7211E series within Azoteq's ProxSense portfolio. It is designed as a versatile solution for small form-factor devices needing reliable touch input. The series emphasizes low power consumption and ease of integration through automated tuning and pre-programmable memory options.

Replacement Considerations

Check for other variants in the IQS7211E family, such as those in WLCSP18 packages, if board space constraints differ. Verify pinout compatibility if substituting with other ProxSense controllers, as channel counts and package types vary across the series.

FAQ

What is the maximum number of fingers supported by the IQS7211E?

The IQS7211E supports up to 2 fingers tracking simultaneously.

Does the IQS7211E require production line calibration?

No, the system automatically compensates for mechanical and temperature changes, eliminating the need for production line calibration.

What is the maximum I2C clock frequency supported?

The device supports an I2C communication interface with speeds up to Fast Plus mode, which is 1 MHz.