IQS7211E002CSR

Overview

The IQS7211E002CSR is a capacitive touch and proximity trackpad controller from Azoteq's ProxSense series. It supports up to 13 external sensor pad connections in the QFN20 package, enabling configurations such as a 7x6 trackpad with single finger gesture support. The device operates on a supply voltage range of 1.8 V to 3.5 V and functions within an ambient temperature range of -40°C to +85°C. It features an I2C interface with IRQ/RDY capabilities up to Fast Plus mode (1 MHz). Key technical specifications include a coordinate report rate up to 100 Hz, two-finger tracking capability, and integrated automatic tuning for electrodes.

Feature Summary

• Supports self- and mutual-capacitive sensor configurations for display wake-up and flexible trackpad layouts.
• Includes an ultra-low power wake-up mechanism triggered by dedicated sensors or screen interaction.
• Features an integrated single finger gesture recognition engine and high-resolution coordinate outputs.
• Provides automatic sensor tuning and internal voltage regulation to maintain sensitivity without calibration.

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 WLCSP18 or QFN20 package variant and pre-programmed settings. Ensure the design accommodates the required I2C pull-up resistors and decoupling capacitors as specified in the reference schematic. Confirm that the host system voltage levels are compatible with the 1.8 V to 3.5 V operating range before integration.

Selection Notes

Select this component when a compact trackpad solution with gesture support is required for wearable or portable devices. The IQS7211E is suitable for designs needing automatic tuning to handle mechanical and temperature variations without production line calibration. Consider the available sensor pad count and package size relative to the PCB layout constraints and overlay material thickness requirements.

Part Context

The IQS7211E belongs to the IQ Switch ProxSense series, designed for versatile capacitive sensing applications. This series emphasizes low power consumption and high sensitivity, making it ideal for battery-operated devices. The IQS7211E specifically targets trackpad implementations, offering flexibility in channel configuration and gesture processing within a small footprint.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer for alternative components within the IQS7211E family or other Azoteq sensor interfaces if pin compatibility or feature sets differ.