IQS228AS-00000000-TSR

Overview

The IQS228AS-00000000-TSR is a single-channel self-capacitive touch and proximity sensor IC from the Azoteq ProxSense series. It features DYCAL™ intelligent hysteresis for drift compensation during prolonged activation. The device operates on a supply voltage of 1.8 V to 3.6 V with a low power mode consumption of 2.5 µA. It utilizes an Automatic Tuning Implementation (ATI) algorithm and supports I2C debug interfaces. The component is housed in a TSOT-23-6 package, measuring 3 mm x 1.7 mm x 1 mm, and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Intelligent hysteresis via DYCAL™ technology tracks environmental drift during extended touch states.
• Automatic Tuning Implementation (ATI) calibrates the sensor to the specific electrode configuration.
• Supports both 1-Wire data streaming and I2C debugging protocols.
• Configurable output logic allows selection between active high or active low modes.

Applications

• On-ear detection for mobile phones
• Proximity sensors for personal media players
• Human interface devices requiring touch feedback
• SAR detection for tablets
• Proximity activated backlighting systems

Procurement Notes

Verify the exact ordering suffix against the manufacturer's current datasheet revision. Confirm that the TSOT-23-6 package variant matches the design requirements. Ensure OTP programming settings align with the intended application logic before finalizing procurement orders.

Selection Notes

Select this model for applications requiring single-channel self-capacitive sensing with dynamic calibration capabilities. The IQS228B/D series supports supply voltages from 1.8 V to 3.6 V. Consider the TSOT-23-6 package for space-constrained designs requiring surface mount installation.

Part Context

This component belongs to the Azoteq IQ Switch ProxSense family, designed for capacitive sensing solutions. It shares architectural similarities with other IQS228 variants but differs in package options and specific OTP configurations. The series emphasizes low power consumption and robust performance in portable electronic devices.

Replacement Considerations

Direct replacements include other IQS228B/D variants with compatible packages. Verify pin compatibility and OTP settings when substituting. Consult the manufacturer for updated components if the current part reaches end-of-life status.