AT42QT1050-UUR

Product Overview

• Category: Capacitive Touch Sensor
• Use: This product is used for touch sensing applications in various electronic devices.
• Characteristics: The AT42QT1050-UUR is a high-performance capacitive touch sensor with advanced features such as proximity detection, adjustable sensitivity, and low power consumption.
• Package: The AT42QT1050-UUR comes in a compact 20-pin QFN package.
• Essence: The essence of this product lies in its ability to accurately detect touch inputs and provide reliable touch sensing solutions.
• Packaging/Quantity: The AT42QT1050-UUR is typically packaged in reels containing 250 units.

Specifications

• Operating Voltage: 2.5V to 5.5V
• Number of Channels: 5
• Sensing Method: Mutual Capacitance
• Proximity Detection Range: Up to 25mm
• Adjustable Sensitivity Levels: 16
• Power Consumption: Low power mode available
• Communication Interface: I2C
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The AT42QT1050-UUR has the following pin configuration:

1. VDD - Power Supply
2. SDA - I2C Serial Data
3. SCL - I2C Serial Clock
4. IRQ - Interrupt Request Output
5. CHG - Charge Time Programming Input
6. OUT1 - Channel 1 Output
7. OUT2 - Channel 2 Output
8. OUT3 - Channel 3 Output
9. OUT4 - Channel 4 Output
10. OUT5 - Channel 5 Output
11. GND - Ground
12. NC - No Connection
13. NC - No Connection
14. NC - No Connection
15. NC - No Connection
16. NC - No Connection
17. NC - No Connection
18. NC - No Connection
19. NC - No Connection
20. NC - No Connection

Functional Features

• Capacitive Touch Sensing: The AT42QT1050-UUR utilizes mutual capacitance sensing technology to detect touch inputs accurately.
• Proximity Detection: It can also detect the presence of objects in close proximity without direct contact.
• Adjustable Sensitivity: The sensitivity levels of the touch sensor can be adjusted to suit different applications and environments.
• Low Power Consumption: The device offers a low power mode, ensuring efficient power usage.
• I2C Interface: The AT42QT1050-UUR communicates with the host microcontroller using the I2C serial interface.
• Interrupt Output: The IRQ pin provides an interrupt signal to the microcontroller when a touch or proximity event occurs.

Advantages and Disadvantages

Advantages

• Accurate touch detection
• Proximity sensing capability
• Adjustable sensitivity for versatile applications
• Low power consumption
• Easy integration with I2C interface
• Compact package size

Disadvantages

• Limited number of channels (5)
• Requires external components for operation

Working Principles

The AT42QT1050-UUR operates based on the principle of mutual capacitance sensing. When a conductive object, such as a finger, approaches the touch sensor, it causes a change in the capacitance of the electrode. This change is detected by the sensor, which triggers a touch event. The device uses an internal charge-transfer mechanism to measure the capacitance and convert it into a digital signal. The I2C interface allows the microcontroller to communicate with the touch sensor and retrieve the touch data.

Detailed Application Field Plans

The AT42QT1050-UUR finds applications in various fields, including:

1. Consumer Electronics: Touch-sensitive buttons and sliders in smartphones, tablets, remote controls, and gaming consoles.
2. Home Appliances: Control panels for kitchen appliances, washing machines, air conditioners, and smart home devices.
3. Automotive: Touch-based infotainment systems, steering wheel controls, and interior lighting controls.
4. Industrial Equipment: Human-machine interfaces (HMIs) for industrial machinery, control panels, and touch-enabled switches.
5. Medical Devices: Touch-sensitive controls for medical equipment, patient monitoring systems, and diagnostic devices.

Detailed and Complete Alternative Models

1. AT42QT1010-UUR: A similar capacitive touch sensor with 1 channel and lower sensitivity levels.
2. AT42QT2120-UUR: A more advanced touch sensor with 12 channels and extended proximity detection range.
3. AT42QT2160-UUR: A high-performance touch controller with 16 channels and enhanced noise immunity.

These alternative models offer different features and specifications to cater to specific application requirements.

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