4-Ch, 16-bit, capacitance to digital converter with active shield driver


Product details


Features Integrated shield drivers Operating temperature range (C) -40 to 125 Vs (Min) (V) 3 Interface type I2C Vs (Max) (V) 3.6 Resolution (Bits) 24 Rating Catalog open-in-new Find other Signal conditioners

Package | Pins | Size

VSSOP (DGS) 10 9 mm² 3 x 3 WSON (DSC) 10 9 mm² 3 x 3 open-in-new Find other Signal conditioners


  • 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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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.

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Technical documentation

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Type Title Date
* Data sheet FDC1004 4-Channel Capacitance-to-Digital Converter for Capacitive Sensing Solutions datasheet (Rev. B) Apr. 09, 2015
Application note FDC1004: Basics of Capacitive Sensing and Applications (Rev. A) Jun. 23, 2021
Application note Common Inductive and Capacitive Sensing Applications (Rev. B) Jun. 22, 2021
Application note Simulate Inductive Sensors Using FEMM (Finite Element Method Magnetics) (Rev. A) Jun. 16, 2021
Application note How to Calibrate FDC1004 for Liquid Level Sensing Applications Oct. 24, 2016
User guide FDC1004 User's Guide (Rev. C) Oct. 20, 2016
Technical article Capacitive sensing: simple algorithm for proximity sensing Nov. 23, 2015
Technical article Capacitive sensing: which architecture should you choose? Oct. 20, 2015
Application note Capacitive Sensing: Direct vs Remote Liquid Level Sensing Performance Analysis (Rev. A) Jul. 24, 2015
Technical article What are you sensing? A novel approach for capacitive-based liquid-level sensing Jun. 25, 2015
Application note Liquid Level Sensing with the Immersive Straw Approach Jun. 19, 2015
Application note Capacitive Proximity Sensing Using the FDC1004 (Rev. A) Apr. 26, 2015
Technical article What are you sensing? Active shielding for capacitive sensing, part 2 Feb. 25, 2015
Application note Capacitive Sensing: Ins and Outs of Active Shielding (Rev. A) Feb. 12, 2015
Application note Capacitive Sensing: Out-of-Phase Liquid Level Technique Jan. 27, 2015
User guide FDC1004 GUI User's Guide Jun. 27, 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The FDC1004 evaluation module is used to evaluate the FDC1004, 4-channel capacitive-to-digital converter. The evaluation modules features a breakable PCB composed of three sections: a USB to I²C converter based on the MSP430F5528 microcontroller, the FDC1004, and two sensor electrodes to demonstrate (...)

  • Multiple board perforations provide maximum evaluation and system design flexibility
  • EVM does not require additional components for operation, enabling rapid device evaluation
  • Accompanying GUI for quick concept demonstration and data capture

Software development

SNVC187A.ZIP (4172 KB)
SNOC028F.ZIP (61513 KB)

Design tools & simulation

SNAM168A.ZIP (13 KB) - IBIS Model

Reference designs

Backlight and Smart Lighting Control by Ambient Light and Proximity Sensor Reference Design
TIDA-00373 This system conserves power and extends backlight life by dynamically adjusting the backlight brightness relative to the environment's ambient light.  A capacitive proximity sensor wakes up the system when a user is close to save even more power.


Watch related videos about Sensing NOW.

document-generic Schematic
Capacitive-Based Liquid Level Sensing Sensor Reference Design
TIDA-00317 This reference design, which uses FDC1004EVM, provides robust and accurate capacitive-based liquid level sensing. TIDA-00317 demonstrates the sensor design and configuration setup to mitigate parasitic capacitance interference from the system environment.
document-generic Schematic
Automotive Capacitive Proximity Kick to Open Detection Reference Design
TIDA-00506 This reference design showcases proximity sensitivity using our FDC1004 evaluation module (EVM) for an automotive kick-to-open application within a plastic bumper. This design also showcases test results that include exposure to mud and water on the bumper to determine the impact of common (...)
document-generic Schematic document-generic User guide
Capacitive-Based Human Proximity Detection for System Wake-Up & Interrupt Reference Design
TIDA-00220 This reference design uses our capacitive-to-digital converter technology to provide a high-precision method to wake up systems when human interaction occurs. TIDA-00220 demonstrates techniques for an alternative sensor design, environmental compensation and electromagnetic interference protection.
document-generic Schematic

CAD/CAE symbols

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VSSOP (DGS) 10 View options
WSON (DSC) 10 View options

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