QT1101-IS48G

Series:	QTouch™
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Buttons, Slider
Proximity Detection:	Yes
Number of Inputs:	Up to 10
LED Driver Channels:	--
Interface:	--
Resolution:	8 b
Voltage - Supply:	2.8 V ~ 5 V
Current - Supply:	4.5mA
Operating Temperature:	-40°C ~ 85°C
Package / Case:	48-SSOP (0.295", 7.50mm Width)
Supplier Device Package:	48-SSOP

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Introduction

The QT1101-IS48G is a dual channel, capacitive sensing IC with an integrated 8-bit analog-to-digital converter (ADC). It is designed to detect small changes in the capacitance of a connected device, such as a finger or a stylus. The QT1101-IS48G is an ultra-low power integrated circuit (IC) that can be used in a wide range of applications, including control systems, touch screens, and portable devices.

Application Field

The QT1101-IS48G is suitable for a variety of capacitive touch applications, including hand gesture control, touch screen interfaces, pointing devices, and buttons. It can also be used for more sophisticated tasks, such as capacitive sensing applications involving the detection of finger pressure, finger movement, force, and proximity. The QT1101-IS48G is also useful for intelligent navigation systems, security systems, and machine learning applications.

Working Principle

The QT1101-IS48G is a dual-channel capacitive sensing IC that integrates an 8-bit ADC, a reference voltage and an overload protection circuit. It works by measuring the capacitance across two channels, and then converting this information into digital signals. The capacitance between the two terminals is detected by both the ADC and the reference voltage.When a capacitive load is connected to the device, the change in capacitance is detected by the ADC and the reference voltage. The ADC then converts this information into digital signals, which allows the device to detect changes in capacitance as small as 2% of the full scale range. The reference voltage is used to eliminate any noise or unwanted signals, ensuring reliable and accurate readings.

Conclusion

The QT1101-IS48G is a dual-channel capacitive sensing IC that can be used for a variety of applications, including touch screens, hand gesture control, and security systems. It integrates an 8-bit ADC, a reference voltage, and an overload protection circuit to detect small changes in capacitance. The device is able to detect capacitive changes as small as 2% of full scale range, which makes it ideal for intelligent navigation systems, machine learning applications, and more.

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