IQS211B00000000TSR

Overview

The IQS211B00000000TSR is a single-channel self-capacitance proximity and touch controller from Azoteq’s ProxSense series. It features an integrated movement detection algorithm for long-term activation applications. The device supports standalone direct outputs or I2C configuration via OTP bits. It operates on a supply voltage of 1.764 V to 3.6 V with low power consumption ranging from sub-2 µA in LP mode to 80 µA at 50 Hz response. The IQS211B offers improved temperature response compared to the IQS211A, supporting a wider operating range of -40°C to 85°C. Available packages include TSOT23-6, WLCSP-8, and DFN-6.

Feature Summary

• Integrated on-chip movement detection algorithm for forced activation upon motion.
• Supports both standalone direct output modes and configurable I2C interfaces.
• Utilizes Automatic Tuning Implementation (ATI) for environmental compensation without MCU interaction.
• Offers multiple One-Time-Programmable (OTP) options for flexible configuration.

Applications

• Wearable devices requiring proximity-based wake-up
• Movement detection systems such as fitness trackers and anti-theft alarms
• White goods and home appliances with touch or proximity controls
• Human Interface Devices (HID) with gesture or presence sensing

Procurement Notes

Verify the specific package type (TSOT23-6, WLCSP-8, or DFN-6) required for your design, as availability varies by variant. Confirm that the -40°C to 85°C industrial temperature range meets your operational requirements. Ensure compatibility with existing I2C or standalone logic levels before integration. Check for any specific OTP programming needs if pre-configured settings are desired for production runs.

Selection Notes

Select the IQS211B over the IQS211A when operation below -20°C is required, as the B variant provides improved low-temperature performance. Choose between TSOT23-6, WLCSP-8, or DFN-6 based on board space constraints and mounting preferences. Consider the sensor load capacity; up to 60 pF is supported for proximity detection, while up to 120 pF is allowed for touch applications. Verify that the chosen interface mode (I2C vs. Standalone) aligns with the system's control architecture.

Part Context

The IQS211B is part of Azoteq’s IQ Switch ProxSense series, designed for ultra-low power capacitive sensing. It shares identical firmware with the IQS211A but differs in hardware optimization for better thermal stability. This component serves as a dedicated controller for proximity and touch functions, eliminating the need for complex external processing in simple activation scenarios.

Replacement Considerations

The IQS211B is pin-compatible with the IQS127D, IQS128, IQS227AS, IQS228AS, and IQS231A, though output types may differ. When replacing these parts, verify that the new movement detection and output configurations meet the original design's functional requirements. Ensure that the improved temperature range of the IQS211B does not introduce unintended behavior in previously stable environments.