AK4160EN

Overview

The AK4160EN is a low operating voltage and low power consumption 16-channel capacitive touch sensor IC manufactured by Asahi Kasei Microdevices. It supports up to 8 channels configured as general-purpose inputs/outputs with PWM control for LED driving. The device features channel-independent automatic correction of environmental drifts, an automatic initial setting function for charge current and time, and selectable multi-touch capabilities. It includes an integrated median averaging filter, three interrupt outputs configurable as GPIOs, a reset input pin, and an I2C serial interface. Additionally, it incorporates a 10-bit SAR A/D converter with a sample-and-hold circuit and an internal regulator. Power consumption is typically 3.4uA at a sampling rate of 512ms with all 16 channels active, and the shutdown current is typically 1.0uA.

Feature Summary

• Channel-independent automatic environmental drift correction for each sense terminal
• Automatic initial setting function for optimal charge current and time configuration
• Integrated median averaging filter for noise reduction
• Configurable multi-touch feature with selectable exclusive update modes

Applications

• Mobile phones
• Personal computers
• Home electric applications

Procurement Notes

Verify the specific ordering suffix EN against official manufacturer documentation to confirm package type and temperature range compatibility. Ensure that the I2C address pins AD0 and AD1 are correctly hard-wired to match the desired slave address on the bus. Confirm that unused analog sense terminals are left open and digital GPIO pins are properly terminated to prevent floating states.

Selection Notes

Select this component when a low-power capacitive touch solution with flexible GPIO and LED drive capabilities is required. Consider the 28-pin QFN package dimensions and the need for external reference components such as the 47nF capacitor on VREG and the 100kΩ resistor on RREF. Evaluate the available channels against the required number of touch sensors and auxiliary GPIO functions.

Part Context

The AK4160EN belongs to the AK4160 series of capacitive touch sensor ICs from Asahi Kasei Microdevices. It is designed for applications requiring multiple touch inputs with minimal power consumption. The device integrates signal processing, calibration, and interface logic into a single chip, reducing the system complexity compared to discrete solutions.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided source material.