Product details

Applications Inductive touch buttons Number of input channels 4 Vs (Max) (V) 1.89 Vs (Min) (V) 1.71 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 Operating temperature range (C) -40 to 85
DSBGA (YFD) 16 5 mm² 1.635 x 1.635 TSSOP (PW) 16 22 mm² 5 x 4.4
  • 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) 04 Apr 2017
Application note Design Considerations for Inductive Touch Buttons for Human-to-Machine Interface (Rev. B) 12 Apr 2022
Application note Replacing Mechanical Switches With Inductive Sensors 08 Apr 2022
Application note Inductive Touch – Configuring LDC2114 and LDC3114 Touch-Button Sensitivity (Rev. B) 28 Jul 2021
Application note LDC211x and LDC3114 Internal Algorithm Functionality (Rev. A) 01 Jul 2021
Application note Common Inductive and Capacitive Sensing Applications (Rev. B) 22 Jun 2021
Application note Inductive Touch Buttons for Wearables (Rev. A) 22 Jun 2021
Application note Simulate Inductive Sensors Using FEMM (Finite Element Method Magnetics) (Rev. A) 16 Jun 2021
Application note LDC Device Selection Guide (Rev. D) 15 Jun 2021
Application note Sensor Design for Inductive Sensing Applications Using LDC (Rev. C) 21 May 2021
Application note LDC Target Design (Rev. B) 13 May 2021
Technical article Selecting an airtight approach to water and dust proof buttons 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
Application note LDC2112/LDC2114 Inductive Touch System Design Guide 02 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 10 Nov 2016
Technical article Inductive sensing: target size matters 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 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 (...)
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 (...)
Not available on TI.com
GUI for evaluation module (EVM)

Sensing Solutions EVM GUI Tool v1.10.0 (Rev. F)

SNOC028F.ZIP (61513 KB)
lock = Requires export approval (1 minute)
Simulation model

LDC2114 IBIS Model

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

Inductive Sensing Design Calculator Tool (Rev. G)

SLYC137G.ZIP (3737 KB)
Package Pins Download
DSBGA (YFD) 16 View options
TSSOP (PW) 16 View options

Ordering & quality

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