Overview
The FDC1004DGST, produced by Texas Instruments, is a high-resolution, 4-channel capacitance-to-digital converter designed for implementing capacitive sensing solutions. This device is particularly useful for applications requiring low-power, low-cost, and high-resolution contact-less sensing. Each channel of the FDC1004DGST has a full scale range of ±15 pF and can handle a sensor offset capacitance of up to 100 pF, making it versatile for various sensing tasks. The device features an I2C interface for easy integration with microcontrollers and is available in compact 10-pin WSON and VSSOP packages, making it suitable for space-constrained applications.
Key Specifications
| Parameter | Value |
|---|---|
| Input Range | ±15 pF |
| Measurement Resolution | 0.5 fF |
| Maximum Offset Capacitance | 100 pF |
| Programmable Output Rates | 100/200/400 S/s |
| Maximum Shield Load | 400 pF |
| Supply Voltage | 3.3 V |
| Operating Temperature Range | –40° to 125°C |
| Current Consumption (Active) | 750 µA |
| Current Consumption (Standby) | 29 µA |
| Interface | I2C |
| Number of Channels | 4 |
Key Features
- High-resolution capacitance-to-digital conversion with a measurement resolution of 0.5 fF.
- Four independent channels, each with a full scale range of ±15 pF and capable of handling up to 100 pF of sensor offset capacitance.
- Programmable output rates of 100, 200, and 400 samples per second.
- Shield drivers for sensor shields to reduce EMI interference and focus the sensing direction.
- Low power consumption with active current of 750 µA and standby current of 29 µA.
- I2C interface for easy communication with microcontrollers.
- Compact 10-pin WSON and VSSOP packages suitable for space-constrained applications.
Applications
The FDC1004DGST is versatile and can be applied to a variety of applications, including:
- Proximity sensing and gesture recognition.
- Material analysis.
- Remote liquid level sensing.
- Other contact-less sensing applications where high resolution and low power consumption are critical.
Q & A
- What is the FDC1004DGST used for?
The FDC1004DGST is used for implementing high-resolution capacitive sensing solutions in various applications.
- How many channels does the FDC1004DGST have?
The FDC1004DGST has four independent channels.
- What is the measurement resolution of the FDC1004DGST?
The measurement resolution is 0.5 fF.
- What are the programmable output rates of the FDC1004DGST?
The programmable output rates are 100, 200, and 400 samples per second.
- What is the maximum offset capacitance the FDC1004DGST can handle?
The maximum offset capacitance is 100 pF.
- What interface does the FDC1004DGST use for communication?
The FDC1004DGST uses an I2C interface.
- What are the package options for the FDC1004DGST?
The FDC1004DGST is available in 10-pin WSON and VSSOP packages.
- What is the operating temperature range of the FDC1004DGST?
The operating temperature range is –40° to 125°C.
- How much current does the FDC1004DGST consume in active and standby modes?
In active mode, it consumes 750 µA, and in standby mode, it consumes 29 µA.
- What are some common applications of the FDC1004DGST?
Common applications include proximity sensing, gesture recognition, material analysis, and remote liquid level sensing.
