IQS7211E001CSR

Overview

The IQS7211E001CSR is a ProxSense capacitive touch and proximity trackpad controller by Azoteq. It supports up to 13 external sensor pad connections in the QFN20 package, enabling configurations such as a 7x6 trackpad with single finger gesture recognition. The device operates on a supply voltage of 1.71 V to 3.5 V and features an I2C interface supporting speeds up to 1 MHz. Key electrical parameters include a coordinate report rate of up to 100 Hz, ESD protection rated at ±4000 V (HBM), and current consumption ranging from 5 µA in Low Power 2 mode to 1500 µA in Active Mode. It includes automatic tuning, water immunity, and display interference avoidance.

Feature Summary

• Supports flexible self- and mutual-capacitive sensor configurations for display wake-up and trackpad applications.
• Features an integrated single finger gesture recognition engine and high-resolution coordinate outputs.
• Includes advanced DSP for minimizing display noise and auto-adjusting digital filters.
• Provides ultra-low power wake-up capabilities via dedicated sensors or screen tracking.

Applications

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

Procurement Notes

Verify the specific ordering suffix CSR against the manufacturer's datasheet to confirm the reel packaging configuration. Ensure the design accounts for the QFN20 thermal pad connection requirements. Confirm that the selected sensor pattern matches the supported channel combinations listed in the documentation.

Selection Notes

Select this component when a compact trackpad solution with gesture support is required. The QFN20 package offers 13 sensor connections, suitable for 7x6 layouts. Consider the operating voltage range and I2C interface compatibility with the host MCU. Evaluate power consumption profiles if battery life is a critical constraint.

Part Context

This part belongs to the IQ Switch ProxSense series, designed for versatile touch and proximity sensing. It integrates a CPU, sensing engines, and power management into a small footprint. The IQS7211E variant specifically targets applications needing gesture recognition alongside standard trackpad functionality.

Replacement Considerations

Check for other IQS7211E variants with different packages (e.g., WLCSP18) or pre-programmed settings. Verify pinout compatibility if substituting with other Azoteq controllers in the same family.

FAQ

What is the maximum number of fingers supported?

The IQS7211E supports up to 2 fingers tracking simultaneously.

Does the device require production line calibration?

No, the system automatically compensates for mechanical and temperature changes without requiring production line calibration.

What is the minimum display cover lens thickness?

The minimum thickness is 0.5 mm, with a maximum of 2-4 mm depending on design parameters.