IQS227B00000000TSR

Overview

The IQS227B00000000TSR is a single-channel capacitive proximity and touch controller from the ProxSense series. It features an internal voltage regulator and reference capacitor, utilizing a charge transfer method for sensing. The device provides dedicated outputs for proximity (POUT) and touch (TOUT) events, supporting I2C data streaming. It operates within a supply voltage range of 1.8 V to 3.6 V and functions across a temperature range of -40°C to +85°C. Available in TSOT23-6, DFN-6, and WLCSP-8 packages, it includes Automatic Tuning Implementation (ATI) and user-selectable One Time Programmable (OTP) options for power modes and output configurations.

Feature Summary

• Automatic Tuning Implementation (ATI) for sense electrode optimization
• Dual digital outputs for distinct proximity and touch event detection
• Configurable One Time Programmable (OTP) settings for power modes and logic levels
• Integrated internal voltage regulator and reference capacitor

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm package type and configuration options. Ensure compatibility with system voltage requirements, as the IQS227B variant supports 1.8 V to 3.6 V. Confirm OTP programming needs prior to deployment, as these settings are permanent once written.

Selection Notes

Select this component for applications requiring single-channel capacitive sensing with minimal external components. Consider the IQS227D variant if the operating environment requires a higher supply voltage range of 2.4 V to 5.5 V. Evaluate package availability based on PCB space constraints, choosing between TSOT23-6, DFN-6, or WLCSP-8 formats.

Part Context

This part belongs to the Azoteq ProxSense IQS227/B/D series, designed for self-capacitive sensing applications. It serves as a low-power alternative to electromechanical switches, enabling features like Find-In-The-Dark activation and standby wake-up. The series emphasizes ease of integration through automatic tuning and flexible output configurations.

Replacement Considerations

Public confirmed substitute part numbers: None identified.