GENERAL DESCRIPTION
The AK4160 is a low operating voltage and low power consumption 16-channel capacitive touch sensor. Maximum 8 channels out of the 16-channel can be configured to LED drive or GPIO. The AK4160 has a channel independent automatic correct function of environmental drifts for each sense input. It reduces false detection by continuous calibration of the internal reference value in the situation when the input capacitance of the touch switch is changed by the external factors such as hydrothermal conditions. The automatic initial setting function sets the charge current and charge time according to the size and the shape of a touch switch. The AK4160 can be configured via serial interfaces, it is suitable for mobile phones, PCs and home electric applications.

FEATURE
■ Up to 16 capacitive sensor inputs
■ Up to 8 general purpose inputs/outputs with PWM control for LED
■ Automatic initial setting function for the charge current and time
■ Independent automatic environmental drifts correct function for each
   sense terminal
■ Independent threshold configuration for each sense terminal
■ Selectable multi touch feature
■ Integrated Median Averaging Filter
■ Selectable 3 interrupt outputs that be able to use as GPIOs
■ Reset Input pin
■ I2C Serial Interface
■ 10 bit SAR A/D Converter with S/H circuit
■ Integrated Regulator
■ Low Power Consumption: Typ. 3.4uA
   (Sampling rate=512ms, 16ch Sensor input Active)
■ Power Down Current: Typ. 1.0uA
■ Low Power Operation: VDD = 1.71V ~ 3.6V
■ Operating Temperature: Ta = -40 ~ 85 °C
■ Package: 28pin QFN (4.0mm x 4.0mm, pitch 0.4mm)