IQS211B00000000DNR

Overview

The IQS211B00000000DNR 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 operates on a supply voltage of 1.764 V to 3.6 V and supports I²C or standalone configurations via One-Time Programmable (OTP) bits. Key electrical parameters include power consumption of 80 µA at 50 Hz response, 20 µA at 20 Hz response, and sub-2 µA in low-power mode. It supports sensor loads up to 60 pF for proximity and 120 pF for touch. The IQS211B offers improved temperature response compared to the IQS211A and is available in TSOT23-6, WLCSP-8, and DFN-6 packages with an operating range of -40°C to 85°C.

Feature Summary

• Integrated on-chip movement detection algorithm that forces activation upon detecting motion.
• Supports Automatic Tuning Implementation (ATI) for automated environmental compensation without MCU interaction.
• Configurable primary and secondary digital outputs allowing flexible interface modes including I²C, 1-Wire streaming, and standalone direct outputs.
• Internal Capacitor Implementation (ICI) minimizes external component requirements.

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 variant (TSOT23-6, WLCSP-8, or DFN-6) required for your design, as availability may vary by region. Confirm OTP programming status if pre-programmed settings are needed for production. Ensure the supplier provides genuine Azoteq components with proper traceability documentation to guarantee firmware version 0x02 compatibility.

Selection Notes

Select the IQS211B over the IQS211A when operation below -20°C is required, as the B variant supports -40°C to 85°C. Choose based on board space constraints: TSOT23-6 for standard surface mount, WLCSP-8 for minimal footprint, or DFN-6 for thermal performance. Verify that the application requires single-channel self-capacitance sensing rather than mutual capacitance for multi-touch matrices.

Part Context

This component belongs to the IQ Switch ProxSense series, designed for ultra-low power capacitive sensing. It shares identical firmware with the IQS211A but differs in hardware optimization for extended temperature ranges. The IQS211B is pin-compatible with older IQS127D/128 and IQS227AS/228AS families, facilitating drop-in replacements for legacy designs requiring enhanced thermal stability.

Replacement Considerations

The IQS211A is the direct functional equivalent with identical firmware but limited to -20°C to 85°C operation. For legacy upgrades, the IQS127D, IQS128, IQS227AS, and IQS228AS are pin-compatible alternatives, though output types and feature sets may differ. Verify that any substitute supports the required movement detection and low-power standby modes.