IQS227AS00000000TSR

Overview

The IQS227AS00000000TSR is a single-channel capacitive proximity and touch controller from the Azoteq ProxSense series. It features an internal voltage regulator and reference capacitor, providing dedicated outputs for proximity (POUT) and touch (TOUT) events. The device supports supply voltages of 1.8 V to 3.6 V or 2.4 V to 5.5 V depending on the specific variant, operating within a temperature range of -40°C to +85°C. Configuration is managed via One Time Programmable (OTP) options, allowing selection of power modes, output logic, and sensitivity thresholds.

Feature Summary

• Automatic Tuning Implementation (ATI) for sense electrode calibration
• Configurable output modes including Direct, Latch, and Toggle states
• Supports I2C data streaming option on TOUT and POUT pins
• Advanced on-chip digital signal processing with noise detection

Applications

• LCD, Plasma & LED TVs
• GSM cellular telephones for on-ear detection and touch keys
• LED flashlights or headlamps
• White goods and appliances
• Automotive door pocket lighting and electric window control

Procurement Notes

Verify the exact suffix configuration against the manufacturer's ordering guide to ensure correct package type and OTP settings. Confirm availability status as distribution channels may list limited stock or end-of-life notifications. Cross-reference the datasheet revision to validate pinout compatibility and electrical specifications before finalizing procurement orders.

Selection Notes

Select the appropriate voltage variant based on the system supply rails; the 'D' suffix typically indicates support for higher input voltages up to 5.5 V. Ensure the chosen package matches the PCB footprint requirements, such as TSOT-23-6 or DFN-6. Verify that the required output logic levels and streaming capabilities align with the target microcontroller interface constraints.

Part Context

This component belongs to the Azoteq IQS227B/D ProxSense family, designed for self-capacitive sensing applications. It serves as a low-power alternative to electromechanical switches in human interface devices. The series integrates charge transfer sensing technology to detect both proximity and touch events through a single sense electrode connection.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.