Product details

Applications Inductive touch buttons Number of input channels 4 Vs (max) (V) 1.89 Vs (min) (V) 1.71 Rating Catalog Operating temperature range (°C) -40 to 85
Applications Inductive touch buttons Number of input channels 4 Vs (max) (V) 1.89 Vs (min) (V) 1.71 Rating Catalog Operating temperature range (°C) -40 to 85
DSBGA (YFD) 16 3.24 mm² 1.8 x 1.8 TSSOP (PW) 16 32 mm² 5 x 6.4
  • Low Power Consumption:
    • One Button: 6 µA at 0.625 SPS
    • Two Buttons: 72 µA at 20 SPS
  • Configurable Button Scan Rates:
    • 0.625 SPS to 80 SPS
  • Force Level Measurement of Touch Buttons
  • Independent Channel Operation:
    • Two Channels for LDC2112
    • Four Channels for LDC2114
  • Integrated Algorithms to Enable:
    • Adjustable Force Threshold per Button
    • Environmental Shift Compensation
    • Simultaneous Button Press Detection
  • Supports Independent Operation without MCU
  • Robust EMI Performance:
    • Allows for CISPR 22 and CISPR 24 Compliance
  • Operating Voltage Range: 1.8 V ± 5%
  • Temperature Range: –40 °C to +85 °C
  • Interface:
    • I2C
    • Dedicated Logic Output per Channel
  • Low Power Consumption:
    • One Button: 6 µA at 0.625 SPS
    • Two Buttons: 72 µA at 20 SPS
  • Configurable Button Scan Rates:
    • 0.625 SPS to 80 SPS
  • Force Level Measurement of Touch Buttons
  • Independent Channel Operation:
    • Two Channels for LDC2112
    • Four Channels for LDC2114
  • Integrated Algorithms to Enable:
    • Adjustable Force Threshold per Button
    • Environmental Shift Compensation
    • Simultaneous Button Press Detection
  • Supports Independent Operation without MCU
  • Robust EMI Performance:
    • Allows for CISPR 22 and CISPR 24 Compliance
  • Operating Voltage Range: 1.8 V ± 5%
  • Temperature Range: –40 °C to +85 °C
  • Interface:
    • I2C
    • Dedicated Logic Output per Channel

Inductive sensing technology enables touch button design for human machine interface (HMI) on a wide variety of materials such as metal, glass, plastic, and wood, by measuring small deflections of conductive targets. The sensor for an inductive touch system is a coil that can be implemented on a small PCB located behind the panel and protected from the environment. Inductive sensing solution is insensitive to humidity or non-conductive contaminants such as oil and dirt. It is able to automatically correct for any deformation in the conductive targets.

The LDC2112/LDC2114 is a multi-channel low-noise inductance to digital converter with integrated algorithms to implement inductive touch applications. The device employs an innovative LC resonator that offers high rejection of noise and interference. The LDC2112/LDC2114 can reliably detect material deflections of less than 200 nm.

The LDC2112/LDC2114 includes an ultra-low power mode intended for power on/off buttons in battery powered applications.

The LDC2112/LDC2114 is available in a 16-pin DSBGA or TSSOP package. The 0.4 mm pitch DSBGA package has a very small 1.6 × 1.6 mm nominal body size with a maximum height of 0.4 mm. The 0.65 mm pitch TSSOP package has a 5.0 × 4.4 mm nominal body size with a maximum height of 1.2 mm.

Inductive sensing technology enables touch button design for human machine interface (HMI) on a wide variety of materials such as metal, glass, plastic, and wood, by measuring small deflections of conductive targets. The sensor for an inductive touch system is a coil that can be implemented on a small PCB located behind the panel and protected from the environment. Inductive sensing solution is insensitive to humidity or non-conductive contaminants such as oil and dirt. It is able to automatically correct for any deformation in the conductive targets.

The LDC2112/LDC2114 is a multi-channel low-noise inductance to digital converter with integrated algorithms to implement inductive touch applications. The device employs an innovative LC resonator that offers high rejection of noise and interference. The LDC2112/LDC2114 can reliably detect material deflections of less than 200 nm.

The LDC2112/LDC2114 includes an ultra-low power mode intended for power on/off buttons in battery powered applications.

The LDC2112/LDC2114 is available in a 16-pin DSBGA or TSSOP package. The 0.4 mm pitch DSBGA package has a very small 1.6 × 1.6 mm nominal body size with a maximum height of 0.4 mm. The 0.65 mm pitch TSSOP package has a 5.0 × 4.4 mm nominal body size with a maximum height of 1.2 mm.

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Technical documentation

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Type Title Date
* Data sheet LDC2112, LDC2114 Inductive Touch Solution for Low-Power HMI Button Applications datasheet (Rev. B) PDF | HTML 04 Apr 2017
Application note Inductive Touch System Design Guide for HMI Button Applications (Rev. A) PDF | HTML 13 Feb 2023
Application note Design Considerations for Inductive Touch Buttons for Human-to-Machine Interface (Rev. B) PDF | HTML 12 Apr 2022
Application note Replacing Mechanical Switches With Inductive Sensors PDF | HTML 08 Apr 2022
Application note Inductive Touch – Configuring LDC2114 and LDC3114 Touch-Button Sensitivity (Rev. B) PDF | HTML 28 Jul 2021
Application note LDC211x and LDC3114 Internal Algorithm Functionality (Rev. A) PDF | HTML 01 Jul 2021
Application note Common Inductive and Capacitive Sensing Applications (Rev. B) PDF | HTML 22 Jun 2021
Application brief Inductive Touch Buttons for Wearables (Rev. A) PDF | HTML 22 Jun 2021
Application note Simulate Inductive Sensors Using FEMM (Finite Element Method Magnetics) (Rev. A) PDF | HTML 16 Jun 2021
Application note LDC Device Selection Guide (Rev. D) PDF | HTML 15 Jun 2021
Application note Sensor Design for Inductive Sensing Applications Using LDC (Rev. C) PDF | HTML 21 May 2021
Application note LDC Target Design (Rev. B) PDF | HTML 13 May 2021
Technical article Selecting an airtight approach to water and dust proof buttons PDF | HTML 19 Jul 2018
Application note Resonance-Based Capacitive Sensing Using LDC2114 20 Sep 2017
EVM User's guide Inductive Touch Coil EVM (INx+COM) (Rev. A) 28 Jul 2017
Application note EMI Considerations for Inductive Sensing 22 Feb 2017
User guide LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter 14 Dec 2016
Technical article How to use the LDC calculations tool PDF | HTML 10 Nov 2016
Technical article Inductive sensing: target size matters PDF | HTML 16 Nov 2015
Application note Measuring Rp of an L-C Sensor for Inductive Sensing 01 Oct 2015
Technical article Inductive sensing: Meet the new multichannel LDCs PDF | HTML 27 Apr 2015

Design & development

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

Evaluation board

LDC2114EVM — LDC2114 1.8V 4-Channel Inductive Touch Evaluation Module

The LDC2114EVM (Evaluation Module) demonstrates the use of inductive sensing to detect a button press on a monolithic piece of metal.  The EVM can connect up to 4 buttons using the LDCTOUCHCOMCOILEVM or customized coils designed through Webench.  Button presses & levels of pressure (...)
User guide: PDF
Not available on TI.com
Evaluation board

LDCTOUCHCOMCOILEVM — Inductive Touch Sensor Coil Evaluation Board

The LDCTOUCHCOMCOILEVM is designed to provide maximum flexibility for system prototyping in inductive touch applications and allows experimentation with different coil sizes.  It includes 5 sets of different sized PCB coils with integrated spacers & perforations such that the coils can be (...)
User guide: PDF
Not available on TI.com
GUI for evaluation module (EVM)

SNOC028 Sensing Solutions EVM GUI Tool v1.10.0

Supported products & hardware

Supported products & hardware

Products
Humidity sensors
HDC1000 Low Power, 3% Accuracy Digital Humidity Sensor with Integrated Temperature Sensor HDC1050 ±3% low-power, digital humidity sensor with temperature sensor HDC2010 2% RH ultra-small, low-power digital relative humidity sensor HDC2080 2% RH ultra-low-power digital relative humidity sensor, interrupt/DRDY
Inductive sensor AFEs
LDC1001-Q1 Automotive, 5V, grade-0, Inductance to Digital Converter LDC1041 1-Ch, 5V, 24-bit L, 8-bit Rp, inductance to digital converter LDC1051 1-Ch, 5V, 8-bit Rp, inductance to digital converter LDC1101 1-Ch, 1.8V, 24-bit L, 16-bit Rp, inductance to digital converter for high speed applications LDC1312 2-Ch, 12-bit, general purpose inductance to digital converter LDC1312-Q1 2-Ch, 12-bit, general purpose automotive inductance to digital converter LDC1314 4-Ch, 12-bit, general purpose inductance to digital converter LDC1314-Q1 4-Ch, 12-bit, general purpose automotive inductance to digital converter LDC1612 2-Ch, 28-bit, high-resolution Inductance to digital converter LDC1612-Q1 2-Ch, 28-bit, high-resolution automotive inductance to digital converter LDC1614 4-Ch, 28-bit, high-resolution Inductance to digital converter LDC1614-Q1 4-Ch, 28-bit, high-resolution automotive inductance to digital converter LDC2112 2-Ch inductance to digital converter with baseline tracking for low power touch buttons LDC2114 4-Ch inductance to digital converter with baseline tracking for low power touch buttons
Signal conditioners
FDC1004 4-channel 16-bit capacitance-to-digital converter with active shield driver for EMC protection FDC1004-Q1 Automotive, 4-channel 16-bit capacitance-to-digital converter with active shield driver for EMC FDC2112 2-Ch, 12-bit, capacitance to digital converter FDC2112-Q1 2-Ch, 12-bit, automotive capacitance to digital converter FDC2114 4-Ch, 12-bit, capacitance to digital converter FDC2114-Q1 4-Ch, 12-bit, automotive capacitance to digital converter FDC2212 2-Ch, 28-bit, capacitance to digital converter FDC2212-Q1 2-Ch, 28-bit, automotive capacitance to digital converter FDC2214 4-Ch, 28-bit, capacitance to digital converter FDC2214-Q1 4-Ch, 28-bit, automotive capacitance to digital converter
Hardware development
Evaluation board
FDC1004EVM FDC1004EVM - 4 Channel Capacitive to Digital Converter Evaluation Module FDC1004QEVM Automotive 4-Channel Capacitive to Digital Converter Evaluation Module FDC2114EVM FDC2114 with Two Capacitive Sensors Evaluation Module FDC2214EVM FDC2214 with Two Capacitive Sensors Evaluation Module HDC1010EVM HDC1010 Low Power Humidity and Temperature Sensor Evaluation Module HDC1080EVM HDC1080 low-power humidity and temperature sensor evaluation module HDC2010EVM HDC2010 Low Power Humidity and Temperature Sensor Evaluation Module HDC2080EVM HDC2080 Low Power Humidity and Temperature Sensor Evaluation Module LDC1000EVM LDC1000EVM - Evaluation Module for Inductance to Digital Converter with Sample PCB Coil LDC1312EVM LDC1312 Evaluation Module for Inductance to Digital Converter with Sample PCB Coils LDC1314EVM LDC1314 Evaluation Module for Inductance to Digital Converter with Sample PCB Coils LDC1612EVM LDC1612 Evaluation Module for Inductance to Digital Converter with Sample PCB Coils LDC1614EVM LDC1614 Evaluation Module for Inductance to Digital Converter with Sample PCB Coils LDC2114EVM LDC2114 1.8V 4-Channel Inductive Touch Evaluation Module
Simulation model

LDC2114 IBIS Model

SNOM611.ZIP (26 KB) - IBIS Model
Calculation tool

LDC-CALCULATOR-TOOLS Inductive Sensing Design Calculator Tool

The inductive sensing calculator tools provide two Excel spreadsheets to assist in the design process for inductive-to-digital converter (LDC) devices. These tools provide coil design assistance as well as some device-specific configurations.

Supported products & hardware

Supported products & hardware

Products
Inductive sensor AFEs
LDC0851 Differential inductive switch for MCU-less applications LDC1041 1-Ch, 5V, 24-bit L, 8-bit Rp, inductance to digital converter LDC1051 1-Ch, 5V, 8-bit Rp, inductance to digital converter LDC1101 1-Ch, 1.8V, 24-bit L, 16-bit Rp, inductance to digital converter for high speed applications LDC1312 2-Ch, 12-bit, general purpose inductance to digital converter LDC1312-Q1 2-Ch, 12-bit, general purpose automotive inductance to digital converter LDC1314 4-Ch, 12-bit, general purpose inductance to digital converter LDC1314-Q1 4-Ch, 12-bit, general purpose automotive inductance to digital converter LDC1612 2-Ch, 28-bit, high-resolution Inductance to digital converter LDC1612-Q1 2-Ch, 28-bit, high-resolution automotive inductance to digital converter LDC1614 4-Ch, 28-bit, high-resolution Inductance to digital converter LDC1614-Q1 4-Ch, 28-bit, high-resolution automotive inductance to digital converter LDC2112 2-Ch inductance to digital converter with baseline tracking for low power touch buttons LDC2114 4-Ch inductance to digital converter with baseline tracking for low power touch buttons LDC3114 4-channel inductance-to-digital converter for low-power proximity and touch-button sensing LDC3114-Q1 Automotive 4-channel inductance-to-digital converter for low-power proximity & touch-button sensing
Hardware development
Evaluation board
LDC0851EVM LDC0851EVM - High Accuracy Inductive Switch with Stacked Coils Evaluation Module LDC1614EVM LDC1614 Evaluation Module for Inductance to Digital Converter with Sample PCB Coils
Package Pins CAD symbols, footprints & 3D models
DSBGA (YFD) 16 Ultra Librarian
TSSOP (PW) 16 Ultra Librarian

Ordering & quality

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  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

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