IQS316-0-QFR

Overview

The IQS316-0-QFR is a multi-channel capacitive sensing controller from the Azoteq IQ Switch ProxSense series, designed for touch applications requiring up to 16 touch inputs. It integrates proximity detection across all keys, providing four additional PROX channel outputs. The device features an internal voltage regulator and Internal Capacitor Implementation (ICI), eliminating the need for external reference capacitors. It supports user-selectable I2C and SPI communication interfaces and operates within a supply voltage range of 2.85V to 5.5V. The controller includes advanced on-chip signal processing, Antenna Tuning Implementation (ATI), and low power modes consuming as little as 45uA.

Feature Summary

• Integrated ProxSense module with dedicated charging schemes for high sensitivity proximity detection
• Internal Capacitor Implementation (ICI) reduces external component count by removing the need for reference capacitors
• Antenna Tuning Implementation (ATI) allows adaptation to varying electrode capacitances without external components
• Dual communication interface support with selectable I2C and SPI protocols

Applications

• Office machines and digital cameras
• Keypads and personal media players
• High-end kitchen appliances and white goods
• Kiosk and POS terminals

Procurement Notes

Verify the specific suffix 'QFR' against the manufacturer's current datasheet revision to confirm package type and availability status. Cross-reference the part number with official distributor listings to ensure compatibility with existing design files. Confirm moisture sensitivity levels and storage requirements prior to procurement.

Selection Notes

Select this component for designs requiring distributed proximity sensing alongside standard touch inputs. Ensure the application environment benefits from the internal capacitor implementation to minimize bill of materials. Verify that the QFN32 package dimensions fit the PCB layout constraints and that the operating temperature range meets system specifications.

Part Context

The IQS316 belongs to the IQ Switch ProxSense series, which utilizes patented capacitive sensing technology for stability and noise immunity. This series is engineered for medium to high channel count applications, offering flexibility in channel configuration and advanced signal processing capabilities for robust performance in various consumer and industrial environments.

Replacement Considerations

Check for updated revisions within the IQS316 family or alternative models in the IQS7222 series if higher channel counts are required. Verify pin-to-pin compatibility if substituting with other Azoteq controllers. Consult the manufacturer for end-of-life notifications or recommended upgrades.