PCA8886TS/Q900/1,1

Overview

The PCA8886TS/Q900/1,1 is a dual-channel capacitive proximity switch featuring patented digital processing and automatic calibration. It operates within a wide voltage range of 3 V to 9 V and supports input capacitance from 10 pF to 60 pF. The device includes two open-drain outputs configurable as push-button, toggle, or pulse modes. Designed for automotive applications, it complies with AEC-Q100 standards and functions across an ambient temperature range of -40 °C to +85 °C. Typical idle supply current is 6 µA, making it suitable for battery-powered systems.

Feature Summary

• Patented digital method for detecting static capacitance changes with continuous auto-calibration
• Configurable output switching modes including push-button, toggle, and pulse generation
• Integrated internal voltage regulator providing stable operation across wide input ranges
• Open-drain outputs capable of driving external loads or CMOS inputs directly

Applications

• Proximity detection in door locks and grips
• Switches for medical applications and dashboard controls
• Vandal-proof switches and transportation upholstery sensors
• Sanitary applications using standard metal parts as switches

Procurement Notes

Verify the specific ordering suffix /Q900/1,1 corresponds to the tape and reel delivery form when sourcing components. Confirm that the TSSOP16 package variant matches the required footprint for the target PCB design. Ensure compliance with ESD handling precautions during assembly to maintain device integrity.

Selection Notes

Select this component for applications requiring high sensitivity and long-distance sensing between the plate and IC. Consider the adjustable sampling rate via CCLIN to balance reaction time against power consumption. Verify that the total input capacitance, including cable effects, remains within the specified operational limits for optimal performance.

Part Context

This part belongs to NXP's family of capacitive proximity switches designed for robust environmental sensing. It utilizes EDISEN technology to distinguish dynamic user interactions from slow static capacitance drifts. The dual-channel architecture allows independent configuration for complex interface requirements in automotive and industrial settings.

Replacement Considerations

No direct public substitute part numbers are documented in the provided datasheet. Designers should evaluate other NXP capacitive touch solutions or generic proximity controllers if pin compatibility is not required.

FAQ

How does the PCA8886 handle slow changes in capacitance?

The device uses a closed-loop control system with an internal current sink to automatically compensate for slow changes in static capacitance, ensuring stable operation without false triggering.

What determines the pulse duration in pulse mode?

In pulse mode, the output activation time is determined by the capacitor connected to the TYPE pin, with a duration of approximately 2.5 ms per nanofarad of capacitance.

Can the sensing plate be connected remotely?

Yes, remote sensing plates can be connected directly to the IC or via a coaxial cable, allowing for significant distances between the sensor and the integrated circuit.