FDC1004DSCT - Texas Instruments

FDC1004DSCT Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the FDC1004DSCT to minimize noise and ensure accurate measurements?
  A good PCB layout for the FDC1004DSCT involves keeping the analog and digital grounds separate, using a solid ground plane, and placing the device close to the capacitive sensor. Additionally, using a shielded cable and a low-pass filter can help reduce noise.
• How do I calibrate the FDC1004DSCT to ensure accurate capacitance measurements?
  Calibration involves connecting a known capacitance to the sensor and adjusting the internal offset and gain registers to match the expected value. The device also has a built-in calibration mode that can be used to simplify the process.
• What is the maximum frequency of the clock input that the FDC1004DSCT can handle?
  The FDC1004DSCT can handle clock frequencies up to 2 MHz, but the recommended frequency is 1 MHz to ensure accurate measurements and minimize power consumption.
• Can the FDC1004DSCT be used in a multi-channel configuration, and if so, how?
  Yes, the FDC1004DSCT can be used in a multi-channel configuration by connecting multiple devices to a single microcontroller and using the chip select (CS) pin to select the desired device. The devices can be connected in a daisy-chain configuration or using a multiplexer.
• What is the power consumption of the FDC1004DSCT, and are there any power-saving modes available?
  The FDC1004DSCT has a typical power consumption of 1.5 mA at 1 MHz clock frequency. The device has a power-down mode that can be used to reduce power consumption to less than 1 μA when not in use.