CAP1106-1-AIA-TR

Overview

The CAP1106-1-AIA-TR is a six-channel capacitive touch sensor IC from Microchip Technology, utilizing RightTouch technology. It operates on a 3V to 3.6V supply with typical standby current of 50µA and deep sleep current of 5µA. The device features programmable sensitivity, automatic recalibration, proximity detection, and multiple button pattern recognition. Communication is handled via SMBus/I2C at frequencies up to 400kHz. It is housed in a 10-pin 3mm x 3mm DFN package and supports an operating temperature range of -40°C to 125°C.

Feature Summary

• Six individual capacitive touch sensor inputs with programmable sensitivity and automatic recalibration capabilities.
• Supports enhanced sensor proximity detection and multiple button pattern recognition for simultaneous touch events.
• Low power operation with Deep Sleep state drawing 5µA typical current and Standby state monitoring active channels.
• SMBus/I2C compliant interface with configurable ALERT# interrupt output for host controller communication.

Applications

• Desktop and Notebook PCs
• LCD Monitors
• Consumer Electronics
• Appliances

Procurement Notes

Verify the specific suffix 'AIA' corresponds to the required RoHS compliance and tape/reel packaging configuration as defined by Microchip's product identification system. Confirm that the 10-pin DFN package dimensions align with your PCB footprint requirements. Ensure the host controller supports the SMBus or I2C protocols utilized by this component for proper integration.

Selection Notes

Select this component when a low channel count (six) capacitive touch solution is required. It is suitable for applications needing proximity detection and pattern recognition alongside standard touch input. Consider the 3mm x 3mm package size for space-constrained designs. Verify that the 3V to 3.6V supply voltage range matches your system's power rails before finalizing the selection.

Part Context

The CAP1106 belongs to Microchip's family of capacitive touch sensors incorporating RightTouch technology. This series provides scalable solutions for touch interfaces, ranging from simple keypads to complex multi-touch patterns. The CAP1106 specifically targets applications requiring a balance of low power consumption and advanced sensing features like proximity and noise immunity within a compact form factor.

Replacement Considerations

Consult Microchip documentation for direct pin-to-pin replacements or functional equivalents within the CAP11xx series. Verify compatibility regarding interface protocols and package dimensions if substituting with other capacitive touch controllers. Ensure any alternative part supports the required six-channel input count and low-power states.

FAQ

How does the CAP1106 handle environmental changes affecting touch sensitivity?

Each sensor input automatically recalibrates to compensate for gradual environmental changes, ensuring consistent performance over time without manual intervention.

What is the function of the ALERT# pin?

The ALERT# pin serves as an active low (or active high when configured) output that signals an interrupt event to the host controller when a touch is detected or other configured conditions are met.

Can the CAP1106 detect touches without physical contact?

Yes, the device includes circuitry for enhanced sensor proximity detection, allowing it to sense capacitance changes as an object approaches the sensor pad without physical contact.