IQS231B00000000TSR

Overview

The IQS231B00000000TSR is a single-channel self-capacitance controller designed for SAR applications, featuring proximity and touch detection. It operates on a supply voltage of 1.75V to 3.6V within an industrial temperature range of -40°C to +85°C. The device utilizes an I2C interface for configuration and data retrieval, housed in a TSOT-23-6 package. Key electrical parameters include a capacitive resolution down to 0.02fF and a maximum capacitive load capability of 120pF. It supports multiple sampling frequencies, including 30Hz, 100Hz, 8Hz, and 4Hz.

Feature Summary

• Integrates quick release detection to prevent false triggers from remaining objects.
• Supports standalone GPIO output or I2C interface with runtime switching capabilities.
• Features advanced temperature and interference compensation for high RF environments.
• Includes movement detection functionality for human presence sensing.

Applications

• Smartphone SAR user interface activation
• On-ear detection for audio devices
• Screen activation hold detection

Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to ensure correct OTP configuration and package type. Confirm that the component meets RoHS compliance requirements for your target market. Cross-reference the part number with official distributor catalogs to validate authenticity and current availability status before finalizing procurement orders.

Selection Notes

Select this model when a single-channel solution with low power consumption is required for SAR compliance. Ensure the design accommodates the TSOT-23-6 footprint and provides adequate decoupling capacitance on the VREG pin. Consider the I2C address settings if multiple sensors are present on the bus. Verify that the external sense electrode area aligns with the device's capacitive load limits.

Part Context

This component belongs to the Azoteq ProxSense series, specifically engineered for mobile device safety and interaction. It serves as a specialized sensor interface replacing discrete solutions, offering integrated calibration and state machine automation. The IQS231B variant provides improved thermal performance compared to its predecessor, ensuring stable operation across wider environmental conditions.

Replacement Considerations

The IQS231A is functionally compatible but lacks the enhanced temperature response of the IQS231B. Verify pin compatibility with existing TSOT-23-6 designs. No direct drop-in replacements are officially documented; consult Azoteq for alternative part numbers if form factor constraints differ.