IQS231A-00000000-DNR

Overview

The IQS231A-00000000-DNR is a single-channel self-capacitance controller from the Azoteq ProxSense series, designed for SAR applications. It operates on a supply voltage of 1.764V to 3.6V and features an I2C interface alongside standalone GPIO options. The device utilizes charge-transfer technology with capacitive resolution down to 0.02fF and supports loads up to 120pF. Configuration is managed via OTP bits or I2C commands. It includes quick release detection, movement sensing, and advanced temperature compensation. The component is housed in a TSOT23-6 package.

Feature Summary

• Integrated SAR user interface with simple GPIO output
• Quick release detection to prevent false triggers
• Advanced temperature and interference compensation
• Standalone failsafe mode with heartbeat pulses

Applications

• SAR sensor implementations
• On-ear detection
• Hold detection for screen activation
• Movement sensing applications

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet revision to ensure pinout and configuration compatibility. Confirm that the DNR suffix corresponds to the intended tape and reel packaging requirements for your assembly line. Cross-reference the part number with the latest EOL notices to avoid procurement of obsolete stock.

Selection Notes

Select this component when a single-channel proximity solution with SAR compliance is required. Ensure the design accommodates the TSOT23-6 package dimensions. Verify that the application environment does not exceed the specified operating temperature range of -20°C to 85°C. Consider the I2C interface availability if dynamic configuration during runtime is necessary.

Part Context

This part belongs to the IQS231A/B ProxSense series, which focuses on ultra-low power capacitive sensing. The IQS231A variant specifically targets the -20°C to 85°C temperature range, distinguishing it from the IQS231B which offers extended low-temperature performance. Both share identical firmware but differ in hardware characteristics.

Replacement Considerations

The IQS231B serves as a hardware alternative with improved temperature response. Other ProxSense devices in the TSOT23-6 package are pin-compatible, though input voltage levels and pin functions may vary.