IQS231A-00000000-TSR

Overview

The IQS231A-00000000-TSR is a single-channel self-capacitance controller designed for SAR applications. It operates on a supply voltage of 1.764V to 3.6V and features an I2C interface alongside standalone GPIO outputs. The device supports sampling rates of 30Hz, 100Hz, 8Hz, and 4Hz. It offers capacitive resolution down to 0.02fF with a load capability up to 120pF. Configuration is managed via OTP bits or I2C commands. The component is housed in a TSOT-23-6 package.

Feature Summary

• Integrated quick release detection prevents false triggers from remaining objects
• Advanced temperature and interference compensation ensures stability in high-power RF environments
• Flexible operation modes allow switching between I2C configuration and standalone runtime output
• Built-in failsafe heartbeat pulses provide operational status indication

Applications

• SAR sensor implementations requiring specific absorption rate compliance
• Hold detection mechanisms for screen activation
• On-ear detection for audio devices
• Movement sensing for user interaction and anti-theft protection

Procurement Notes

Verify the exact ordering suffix against the manufacturer's current datasheet revision. Confirm that the TSOT-23-6 package matches your PCB footprint requirements. Ensure the supply voltage range aligns with your system design. Check for any specific OTP configurations required for your application before finalizing the order.

Selection Notes

Select this model when a single-channel proximity solution is needed for SAR qualification. Consider the IQS231B variant if extended low-temperature performance below -20°C is required. Evaluate the need for I2C communication versus standalone GPIO based on system complexity. Ensure external components meet the recommended capacitor values for ESD protection.

Part Context

This component belongs to the Azoteq ProxSense series, which specializes in capacitive touch and proximity sensing. The IQS231A/B family provides ultra-low power solutions for mobile and wearable devices. It integrates analog sensing engines with digital processing to automate environmental compensation without MCU intervention.

Replacement Considerations

The IQS231B shares identical firmware but offers improved hardware for lower temperature ranges. Pin compatibility exists within the same package type across ProxSense devices. Verify functional equivalence if substituting with other single-channel controllers.