FDC2112QDNTTQ1

Product Overview

Category

The FDC2112QDNTTQ1 belongs to the category of integrated circuits (ICs) and specifically falls under the sensor interface ICs.

Use

This product is primarily used for capacitive sensing applications, where it enables accurate and reliable touch and proximity sensing.

Characteristics

• High sensitivity: The FDC2112QDNTTQ1 offers high sensitivity, allowing it to detect even minute changes in capacitance.
• Low power consumption: It operates on low power, making it suitable for battery-powered devices.
• Digital output: The IC provides a digital output, simplifying integration with microcontrollers or other digital systems.
• Noise immunity: It features excellent noise immunity, ensuring reliable operation in noisy environments.

Package

The FDC2112QDNTTQ1 is available in a small form factor package, such as a 16-pin TSSOP (Thin Shrink Small Outline Package).

Essence

The essence of the FDC2112QDNTTQ1 lies in its ability to accurately measure capacitance changes, enabling touch and proximity sensing in various applications.

Packaging/Quantity

Typically, the FDC2112QDNTTQ1 is supplied in reels or tubes, with a quantity of around 2500 units per reel/tube.

Specifications

• Supply voltage: 2.7V to 3.6V
• Operating temperature range: -40°C to +85°C
• Capacitance measurement resolution: 28 bits
• I2C interface for communication
• Adjustable measurement rate
• On-chip temperature sensor

Detailed Pin Configuration

The FDC2112QDNTTQ1 has a total of 16 pins, which are assigned specific functions. The pin configuration is as follows:

1. VDD: Power supply voltage
2. GND: Ground reference
3. SDA: I2C data line
4. SCL: I2C clock line
5. ADDR: Address selection pin
6. INTB: Interrupt output
7. DRDYB: Data ready output
8. TEST: Test mode pin
9. NC: No connection
10. CIN0: Capacitive sensing input channel 0
11. CIN1: Capacitive sensing input channel 1
12. CIN2: Capacitive sensing input channel 2
13. CIN3: Capacitive sensing input channel 3
14. NC: No connection
15. NC: No connection
16. NC: No connection

Functional Features

• High-resolution capacitance measurement: The FDC2112QDNTTQ1 can measure capacitance changes with high precision, enabling accurate touch and proximity sensing.
• Adjustable measurement rate: The IC allows the user to adjust the measurement rate according to the application requirements.
• Temperature compensation: It incorporates an on-chip temperature sensor for compensating capacitance measurements based on temperature variations.
• I2C interface: The device utilizes the widely-used I2C communication protocol for easy integration with microcontrollers or other digital systems.

Advantages and Disadvantages

Advantages

• High sensitivity enables accurate touch and proximity sensing.
• Low power consumption makes it suitable for battery-powered devices.
• Digital output simplifies integration with digital systems.
• Excellent noise immunity ensures reliable operation in noisy environments.

Disadvantages

• Limited number of capacitive sensing channels (4 channels).
• Requires external components for proper operation.

Working Principles

The FDC2112QDNTTQ1 operates based on the principle of capacitance sensing. It measures the change in capacitance when an object comes into proximity with the capacitive sensing input channels. By accurately measuring these capacitance changes, it can detect touch or proximity events.

The IC utilizes an internal oscillator to generate an AC signal, which is applied to the capacitive sensing channels. The change in capacitance alters the frequency of the oscillator, and this frequency change is then converted into a digital value using an on-chip sigma-delta converter. The digital output represents the detected capacitance change, allowing for further processing or triggering appropriate actions.

Detailed Application Field Plans

The FDC2112QDNTTQ1 finds applications in various fields, including but not limited to:

1. Consumer electronics: Touch-sensitive buttons, sliders, and touchpads in smartphones, tablets, and laptops.
2. Automotive: Proximity detection for keyless entry systems, touch-sensitive controls in car interiors.
3. Industrial automation: Proximity sensing for human-machine interfaces, touch-sensitive control panels.
4. Medical devices: Capacitive touch interfaces for medical equipment, touch-sensitive switches.
5. Home appliances: Touch-sensitive controls for kitchen appliances, home automation systems.

Detailed and Complete Alternative Models

• FDC