Overview
The Texas Instruments FDC2112DNTT is a highly integrated, 2-channel, 12-bit capacitance-to-digital converter designed for various capacitive sensing applications. This device is part of the FDC2x1x family, which employs an innovative narrow-band based architecture to offer high rejection of out-of-band noise while providing high resolution at high speed. The FDC2112DNTT is suitable for a wide range of applications, including proximity detection, gesture recognition, and remote liquid level sensing.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 2 |
| Resolution | Up to 12 bits (device), up to 28 bits (family) |
| Maximum Output Rates (one active channel) | 13.3 kSPS |
| Maximum Input Capacitance | 250 nF (at 10 kHz with 1 mH inductor) |
| Sensor Excitation Frequency | 10 kHz to 10 MHz |
| System Noise Floor | 0.3 fF at 100 SPS |
| Supply Voltage | 2.7 V to 3.6 V |
| Active Supply Current | 2.1 mA |
| Low-Power Sleep Mode | 35 µA |
| Shutdown Current | 200 nA |
| Interface | I2C |
| Temperature Range | –40°C to +125°C |
| Package Type | 12-pin WSON (DNT) |
Key Features
- EMI-Resistant Architecture: Provides high rejection of out-of-band noise, ensuring reliable performance even in noisy environments.
- High Resolution and Speed: Offers up to 12-bit resolution and a fast sample rate of up to 13.3 kSPS, making it suitable for applications with fast moving targets.
- Wide Excitation Frequency Range: Supports a frequency range of 10 kHz to 10 MHz, offering flexibility in system design and reliable sensing of conductive liquids.
- Low Power Consumption: Features active, sleep, and shutdown modes with low current consumption (2.1 mA active, 35 µA sleep, 200 nA shutdown).
- I2C Interface: Facilitates easy communication and integration with other components.
- Flexible Sensor Design: Allows any metal or conductor to be used as a sensor, enabling highly flexible system designs.
Applications
- Proximity Detection: Ideal for detecting the presence or absence of objects without physical contact.
- Gesture Recognition: Used in applications requiring the detection of hand or finger gestures.
- Remote Liquid Level Sensing: Suitable for sensing the level of various liquids, including conductive and non-conductive liquids.
- Industrial Automation: Applied in industrial settings for monitoring and controlling processes.
- Consumer Electronics: Used in a variety of consumer devices requiring capacitive sensing capabilities.
Q & A
- What is the FDC2112DNTT used for?
The FDC2112DNTT is used for various capacitive sensing applications, including proximity detection, gesture recognition, and remote liquid level sensing.
- How many channels does the FDC2112DNTT have?
The FDC2112DNTT has 2 channels.
- What is the resolution of the FDC2112DNTT?
The FDC2112DNTT has a resolution of up to 12 bits, though the FDC2x1x family can offer up to 28 bits.
- What is the maximum output rate of the FDC2112DNTT?
The maximum output rate of the FDC2112DNTT is 13.3 kSPS for one active channel.
- What is the maximum input capacitance of the FDC2112DNTT?
The maximum input capacitance is 250 nF at 10 kHz with a 1 mH inductor.
- What is the sensor excitation frequency range of the FDC2112DNTT?
The sensor excitation frequency range is from 10 kHz to 10 MHz.
- What is the system noise floor of the FDC2112DNTT?
The system noise floor is 0.3 fF at 100 SPS.
- What is the supply voltage range of the FDC2112DNTT?
The supply voltage range is from 2.7 V to 3.6 V.
- What are the power consumption modes of the FDC2112DNTT?
The device has active (2.1 mA), sleep (35 µA), and shutdown (200 nA) modes.
- What interface does the FDC2112DNTT use?
The FDC2112DNTT uses an I2C interface.
