IQS7222B202QNR

Sensor And Detector Interfaces Overview

The IQS7222B202QNR is a ProxFusion sensor interface IC from Azoteq, designed for multi-button applications. It supports up to 20 mutual capacitive buttons or 8 self-capacitive buttons via an I2C interface. The device features configurable GPIOs and operates within a supply voltage range of 1.71V to 3.5V. In Normal Power mode with 20 active channels, typical current consumption is 631µA at a 16Hz report rate. Ultra-low power wake-up proximity modes draw approximately 10.4µA to 15.3µA depending on the channel configuration. The component is housed in a QFN20 package.

Sensor And Detector Interfaces Feature Summary

• Sensor fusion architecture with dual ProxFusion modules for rapid response
• Configurable support for mutual and self-capacitive sensing topologies
• Automated tuning implementation (ATI) with automatic re-tuning capabilities
• Programmable memory allowing auto-run from one-time programmable settings

Sensor And Detector Interfaces Applications

• Remote control user interfaces
• Home automation device controls
• Wireless speaker controls

Sensor And Detector Interfaces Procurement Notes

Verify the specific ordering suffix 'QNR' against the manufacturer's datasheet to confirm the QFN20 package variant and marking option. Ensure that the required external decoupling capacitors meet the equivalent series resistance specifications outlined in the electrical characteristics section. Confirm that the host system I2C bus timing aligns with the Fast Plus mode requirements.

Sensor And Detector Interfaces Selection Notes

Select this component when a high channel count is required for complex button arrays. The IQS7222B202QNR is suitable for designs needing flexible power management between normal operation and ultra-low power proximity wake-up states. Consider the QFN20 footprint constraints during PCB layout planning. Evaluate the need for distributed proximity sensing if battery life optimization is critical.

Sensor And Detector Interfaces Part Context

This part belongs to the Azoteq IQS7222B ProxFusion series, which integrates capacitive touch and proximity sensing into a single controller. The IQS7222B family provides a scalable solution for various input devices, offering both mutual and self-capacitance configurations. The QNR suffix specifically denotes the QFN20 package type available for this controller.

Sensor And Detector Interfaces Replacement Considerations

The IQS7222B201QNR is a documented alternative within the same series. Verify pin compatibility and register mapping before substitution. Other members of the IQS7222 family may offer different channel counts or package options.