Overview
The FDC2212DNTR, produced by Texas Instruments, is a 2-channel, 28-bit capacitance-to-digital converter designed for high-resolution 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 FDC2212 is optimized for high resolution, making it suitable for a variety of applications including proximity detection, gesture recognition, and remote liquid level sensing.
Key Specifications
| Parameter | Value |
|---|---|
| Package | WSON (DNT) with 12 pins |
| Operating Temperature Range | -40°C to 125°C |
| Number of Channels | 2, 4 |
| Resolution | Up to 28 bits |
| Maximum Output Rate (one active channel) | 4.08 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 |
| Power Consumption | Active: 2.1 mA, Low-power sleep mode: 35 µA, Shutdown: 200 nA |
| Interface | I2C |
Key Features
- EMI-resistant architecture: Ensures performance even in the presence of fluorescent light and other noise sources.
- High resolution: Up to 28 bits, making it suitable for precise sensing applications.
- Wide excitation frequency range: 10 kHz to 10 MHz, offering flexibility in system design.
- Low power consumption: Active mode at 2.1 mA, low-power sleep mode at 35 µA, and shutdown at 200 nA.
- I2C interface: Facilitates easy communication with microcontrollers and other devices.
- High rejection of out-of-band noise: Innovative narrow-band based architecture for high accuracy in sensing.
Applications
- Proximity sensing: Detecting the presence of objects without physical contact.
- Gesture recognition: Enabling devices to respond to user gestures.
- Liquid level sensing: Monitoring the level of various types of liquids, including conductive and non-conductive liquids.
- Remote sensing: Tracking environmental changes such as temperature and humidity.
Q & A
- What is the resolution of the FDC2212DNTR?
The FDC2212DNTR has a resolution of up to 28 bits.
- What is the maximum output rate of the FDC2212DNTR?
The maximum output rate for one active channel is 4.08 kSPS.
- What is the maximum input capacitance of the FDC2212DNTR?
The maximum input capacitance is 250 nF (at 10 kHz with 1 mH inductor).
- What is the sensor excitation frequency range of the FDC2212DNTR?
The sensor excitation frequency range is from 10 kHz to 10 MHz.
- What is the power consumption of the FDC2212DNTR in active mode?
The power consumption in active mode is 2.1 mA.
- What interface does the FDC2212DNTR use?
The FDC2212DNTR uses an I2C interface.
- What is the operating temperature range of the FDC2212DNTR?
The operating temperature range is from -40°C to 125°C.
- Is the FDC2212DNTR resistant to EMI?
Yes, the FDC2212DNTR has an EMI-resistant architecture.
- What are some common applications of the FDC2212DNTR?
Common applications include proximity sensing, gesture recognition, and liquid level sensing.
- How many channels does the FDC2212DNTR support?
The FDC2212DNTR supports 2 or 4 channels.
