FDC1004 4 Channel Capacitance to Digital Converter for Capacitive Sensing (Cap Sensing) Solutions | TI.com

FDC1004 (ACTIVE)

4 Channel Capacitance to Digital Converter for Capacitive Sensing (Cap Sensing) Solutions

4 Channel Capacitance to Digital Converter for Capacitive Sensing (Cap Sensing) Solutions - FDC1004
 

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  • FDC2114  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   EMI-resistant architecture enables much better noise performance in proximity sensing and faster sample rates enables conductive liquid level sensing
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Description

Capacitive sensing with grounded capacitor sensors is a very low-power, low-cost, high-resolution contact-less sensing technique that can be applied to a variety of applications ranging from proximity sensing and gesture recognition to material analysis and remote liquid level sensing. The sensor in a capacitive sensing system is any metal or conductor, allowing for low cost and highly flexible system design.

The FDC1004 is a high-resolution, 4-channel capacitance-to-digital converter for implementing capacitive sensing solutions. Each channel has a full scale range of ±15 pF and can handle a sensor offset capacitance of up to 100 pF, which can be either programmed internally or can be an external capacitor for tracking environmental changes over time and temperature. The large offset capacitance capability allows for the use of remote sensors.

The FDC1004 also includes shield drivers for sensor shields, which can reduce EMI interference and help focus the sensing direction of a capacitive sensor. The small footprint of the FDC1004 allows for use in space-constrained applications. The FDC1004 is available in a 10-pin WSON and VSSOP package and features an I2C interface for interfacing to an MCU.

Features

  • 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
  • Temp Range: –40° to 125°C
  • Current Consumption:
    • Active: 750 µA
    • Standby: 29 µA
  • Interface: I2C
  • Number of Channels: 4

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Other qualified versions of FDC1004

Version Part Number Definition
Automotive FDC1004-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects