IQS227D00000000DNR

Overview

The IQS227D00000000DNR is a single-channel capacitive proximity and touch controller from the Azoteq 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, configurable via One Time Programmable (OTP) options. It operates within a supply voltage range of 2.4 V to 5.5 V and supports an operating temperature range of -40°C to +85°C. The component is available in DFN-6 and TSOT23-6 packages.

Feature Summary

• Automatic Tuning Implementation (ATI) for automatic sense electrode tuning
• Configurable output modes including Active, Latch, and Toggle states
• Supports I2C data streaming option on TOUT and POUT pins
• Advanced on-chip digital signal processing with user-selectable power modes

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 specific ordering suffix against the manufacturer's datasheet to confirm package type and configuration settings. Ensure compatibility with the required supply voltage range of 2.4 V to 5.5 V for the IQS227D variant. Confirm OTP programming requirements if custom configurations are needed for the application.

Selection Notes

Select the IQS227D variant specifically when the system requires a supply voltage range of 2.4 V to 5.5 V, as opposed to the IQS227B which supports 1.8 V to 3.6 V. Consider the DFN-6 or TSOT23-6 package availability based on PCB space constraints. Evaluate the need for specific OTP configurations such as output logic or power modes during the design phase.

Part Context

The IQS227D is part of the IQ Switch ProxSense series, designed as a fully integrated self-capacitive sensor controller. It serves as a replacement for electromechanical switches in various human interface devices. The device integrates Automatic Tuning Implementation to track environmental changes and includes advanced filtering for noise detection.

Replacement Considerations

The IQS227B is a related variant within the same series but operates at a lower supply voltage (1.8 V to 3.6 V). Verify that the system power rail meets the 2.4 V minimum requirement for the IQS227D before considering substitution.