CAP1114-1-EZK-TR

Overview

The CAP1114-1-EZK-TR is a multiple channel capacitive touch sensor and LED driver featuring fourteen individual capacitive touch sensor inputs with programmable sensitivity. It includes eleven low-side LED drivers capable of full-on/off, variable rate blinking, dimness controls, and breathing effects. The device operates on a 3.0V to 3.6V supply voltage with typical quiescent currents of 250µA in sleep mode and 4.5µA in deep sleep. It communicates via an SMBus 2.0 compliant interface and utilizes Right-Touch technology for automatic recalibration and proximity detection.

Feature Summary

• Integrates fourteen capacitive touch sensor inputs with automatic recalibration and slider acceleration detection capabilities.
• Includes eleven open-drain LED drivers supporting programmable blink, breathe, and dimness controls with button-to-LED linking.
• Features eight configurable GPIOs among the LED outputs and supports SMBus 2.0 communication for system parameter configuration.
• Provides multiple power states including Deep Sleep with wake-up functionality and low quiescent current consumption.

Applications

• Consumer Electronics
• Desktop and Notebook PCs
• LCD Monitors

Procurement Notes

Verify the specific ordering suffix -EZK-TR against the manufacturer's official documentation to confirm package type and temperature range. Ensure the host controller supports the required SMBus protocol timing and voltage levels compatible with the device's 5V tolerant pins. Confirm that the application design accounts for the necessary pull-up resistors on the SMBus lines as specified in the electrical characteristics.

Selection Notes

Select this component when designing systems requiring up to fourteen independent touch inputs combined with integrated LED indication. Consider the 32-pin QFN package dimensions for PCB layout constraints. Evaluate the power management requirements against the available sleep and deep sleep modes to optimize battery life in portable applications. Verify compatibility with the host processor's interrupt handling capabilities via the ALERT pin.

Part Context

The CAP1114 is part of Microchip's Right-Touch capacitive sensing family, designed to replace mechanical switches in modern electronic interfaces. It integrates advanced sensing algorithms to handle environmental variations and parasitic capacitance changes. The device simplifies user interface design by combining touch sensing and LED driving functions into a single chip, reducing overall component count and board space requirements.

Replacement Considerations

Consult the datasheet delta section for differences between the CAP1114 and the CAP1014 regarding register configurations and LED behavior updates. Verify functional equivalence if substituting with other Microchip capacitive touch controllers, ensuring interface compatibility and pinout alignment.

FAQ

What is the default slave address for the CAP1114-1 variant?

The CAP1114-1 responds to the factory-set slave address 0101_000xb.

How does the device handle automatic recalibration?

Each sensor contains automatic recalibration circuitry that compensates for design and parasitic variance in untouched capacitance, with a default recalibration interval of 8 seconds.

Can the LED drivers be used as general-purpose I/O?

Yes, eight of the eleven LED drivers can be configured as GPIOs, supporting both open-drain and push-pull operation modes.