AT42QT1070-MMHR

Product Overview

• Category: Capacitive Touch Sensor
• Use: This product is used for touch sensing applications in various electronic devices.
• Characteristics: The AT42QT1070-MMHR is a compact and highly sensitive capacitive touch sensor. It offers reliable touch detection with low power consumption.
• Package: The AT42QT1070-MMHR comes in a small 20-pin QFN package.
• Essence: The essence of this product lies in its ability to accurately detect touch inputs and provide a user-friendly interface for electronic devices.
• Packaging/Quantity: The AT42QT1070-MMHR is typically sold in reels containing 250 units.

Specifications

• Operating Voltage: 2.0V - 5.5V
• Number of Channels: 7
• Sensitivity Range: Adjustable
• Communication Interface: I2C
• Power Consumption: Low power mode available
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The AT42QT1070-MMHR has a total of 20 pins. Here is the detailed pin configuration:

1. VDD - Power supply voltage
2. SDA - I2C data line
3. SCL - I2C clock line
4. GND - Ground
5. CH0 - Touch channel 0
6. CH1 - Touch channel 1
7. CH2 - Touch channel 2
8. CH3 - Touch channel 3
9. CH4 - Touch channel 4
10. CH5 - Touch channel 5
11. CH6 - Touch channel 6
12. INT - Interrupt output
13. RST - Reset input
14. ADDR0 - I2C address selection bit 0
15. ADDR1 - I2C address selection bit 1
16. ADDR2 - I2C address selection bit 2
17. VSS - Ground
18. NC - No connection
19. NC - No connection
20. VDD - Power supply voltage

Functional Features

• Capacitive touch sensing with adjustable sensitivity.
• Automatic recalibration to compensate for environmental changes.
• Low power consumption for extended battery life.
• Interrupt output for efficient touch event handling.
• Multiple touch channels for versatile applications.

Advantages and Disadvantages

Advantages: - Highly sensitive touch detection. - Compact size for easy integration into various devices. - Low power consumption. - Adjustable sensitivity for different touch requirements. - Automatic recalibration for reliable performance.

Disadvantages: - Limited number of touch channels (7). - Requires I2C communication interface.

Working Principles

The AT42QT1070-MMHR utilizes capacitive sensing technology to detect touch inputs. It measures the change in capacitance when a conductive object, such as a finger, comes in contact with the touch channels. The sensor then converts this change into digital signals that can be processed by the connected microcontroller or system.

Detailed Application Field Plans

The AT42QT1070-MMHR is widely used in various electronic devices that require touch sensing capabilities. Some of the common application fields include:

1. Consumer Electronics: Smartphones, tablets, remote controls, gaming consoles, and home appliances.
2. Automotive: Touch-sensitive buttons and panels in car interiors.
3. Industrial Control Systems: Human-machine interfaces, control panels, and touch-enabled equipment.
4. Medical Devices: Touch-sensitive controls in medical equipment and devices.
5. Home Automation: Touch switches, dimmers, and control panels for smart homes.

Detailed and Complete Alternative Models

1. AT42QT1010: Similar capacitive touch sensor with 1 touch channel.
2. AT42QT2120: Capacitive touch controller with 12 touch channels and advanced features.
3. AT42QT2160: Capacitive touch controller with 16 touch channels and extended functionality.

These alternative models offer different touch channel configurations and additional features to suit specific application requirements.

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