IQS227B00000000DNR

Overview

The IQS227B00000000DNR 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. The component is housed in a WLCSP-8 package.

Feature Summary

• Automatic Tuning Implementation (ATI) for self-calibration of sense electrodes
• Configurable output modes including Active, Latch, and Toggle states
• Supports I2C data streaming for direct digital interface communication
• User-selectable power modes via One Time Programmable (OTP) configuration

Applications

• On-ear detection and touch keys for GSM cellular telephones
• Proximity detection for backlighting activation in LCD and LED displays
• Wake-up triggers from standby mode in consumer electronics
• Find-In-The-Dark (FITD) applications for flashlights and headlamps

Procurement Notes

Verify the specific ordering suffix DNR against the manufacturer's current datasheet revision to confirm package type and pre-programmed OTP settings. Ensure compatibility with the required supply voltage range of 1.8 V to 3.6 V for the B-series variant. Confirm that the WLCSP-8 packaging aligns with your assembly capabilities and reflow profile requirements.

Selection Notes

Select this model when a single-channel solution with integrated automatic tuning is required. The IQS227B variant supports lower supply voltages compared to the IQS227D. Consider the WLCSP-8 package for space-constrained designs. Verify that the default or configured OTP settings meet the specific sensitivity and output logic requirements of the target application without needing post-production modification.

Part Context

This component belongs to the Azoteq IQS227 family of ProxSense controllers. It is designed as a low-power alternative to electromechanical switches. The device integrates analog sensing circuitry with digital signal processing to detect changes in capacitance on a single sense electrode, distinguishing between proximity and touch events based on configurable thresholds.

Replacement Considerations

The IQS227B00000000CSR is a comparable single-channel controller in the same series. Verify pinout compatibility between WLCSP-8 variants and ensure functional equivalence regarding I2C streaming and output configurations before substitution.