Capacitive-Based Liquid Level Sensing Sensor Reference Design
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

Description & Features

Technical documentation

Support & Training

Order Now

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Key Document


This TI Design with the use of the FDC1004EVM provides a robust and accurate capacitive-based liquid level sensing solution. TIDA-00317 demonstrates the sensor design and configuration setup to mitigate parasitic capacitance interference from the system environment.

  • Liquid level sensing using capacitive sensing technology
  • Reduces parasitic interference from the system environment
  • Rigid-flex circuit allows the sensors to be placed on various surface shapes
  • Liquid height resolution <1mm
  • Includes the environmental reference sensor to help compensate for environmental changes
  • Developed to be paried with the FDC1004EVM and FDC1004EVM GUI

See the Important Notice and Disclaimer covering reference designs and other TI resources.


Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Test Data

Get results faster with test and simulation data that's been verified.

Download Test Data

Design Files

Download ready-to-use system files to speed your design process. Get Viewer.

Download Design Files

TI Devices (2)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
FDC1004  4-Ch, 16-bit, capacitance to digital converter with active shield driver  Specialty sensors  Sample & Buy View Design Kits & Evaluation Modules
MSP430F5528  25 MHz MCU with 128KB Flash, 8KB SRAM, 12-bit ADC, comparator, DMA, UART/SPI/I2C, USB, HW multiplier  Microcontrollers (MCUs)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
FDC1004 Download Download
Download Download
MSP430F5528 Download Download
Download -
(ZQE) | 80 Download -

Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

Step 1: Download and install the free download.

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.

Technical documentation

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guide (1)
Title Type Size (KB) Date
PDF 942 05 Mar 2015
Design files (5)
Title Type Size (KB) Date
ZIP 1795 30 Jan 2015
PDF 141 30 Jan 2015
PDF 300 30 Jan 2015
PDF 183 30 Jan 2015
PDF 33 30 Jan 2015

Support & training

TI E2E™ forums with technical support from TI engineers

Search our extensive online knowledge base where millions of technical questions and answers are available 24/7.

Search answers from TI experts

Content is provided 'AS IS' by the respective TI and Community contributors and does not constitute TI specifications.
See terms of use.

If you have questions about quality, packaging, or ordering TI products visit our Support page.

Technical articles