Product details

Applications Encoders/event counters, Inductive touch buttons, Metal proximity detection Number of input channels 2 Vs (max) (V) 3.6 Vs (min) (V) 2.7 Rating Catalog Operating temperature range (°C) -40 to 125
Applications Encoders/event counters, Inductive touch buttons, Metal proximity detection Number of input channels 2 Vs (max) (V) 3.6 Vs (min) (V) 2.7 Rating Catalog Operating temperature range (°C) -40 to 125
WSON (DNT) 12 16 mm² 4 x 4
  • Easy-to-Use – Minimal Configuration Required
  • Up to 4 Channels With Matched Sensor Drive
  • Multiple Channels Support Environmental and Aging Compensation
  • Remote Sensor Position of >20 cm Supports Operation In Harsh Environments
  • Pin-Compatible Medium and High-Resolution Options:
    • LDC1312/4: 2/4-ch 12-Bit LDC
    • LDC1612/4: 2/4-ch 28-Bit LDC
  • Sensing Range Beyond Two Coil Diameters
  • Supports Wide Sensor Frequency Range of 1 kHz to 10 MHz
  • Power Consumption:
    • 35 µA Low Power Sleep Mode
    • 200 nA Shutdown Mode
  • 2.7 V to 3.6 V Operation
  • Multiple Reference Clocking Options:
    • Included Internal Clock For Lower System Cost
    • Support for 40 MHz External Clock For Higher System performance
  • Immunity to DC Magnetic Fields and Magnets
  • Easy-to-Use – Minimal Configuration Required
  • Up to 4 Channels With Matched Sensor Drive
  • Multiple Channels Support Environmental and Aging Compensation
  • Remote Sensor Position of >20 cm Supports Operation In Harsh Environments
  • Pin-Compatible Medium and High-Resolution Options:
    • LDC1312/4: 2/4-ch 12-Bit LDC
    • LDC1612/4: 2/4-ch 28-Bit LDC
  • Sensing Range Beyond Two Coil Diameters
  • Supports Wide Sensor Frequency Range of 1 kHz to 10 MHz
  • Power Consumption:
    • 35 µA Low Power Sleep Mode
    • 200 nA Shutdown Mode
  • 2.7 V to 3.6 V Operation
  • Multiple Reference Clocking Options:
    • Included Internal Clock For Lower System Cost
    • Support for 40 MHz External Clock For Higher System performance
  • Immunity to DC Magnetic Fields and Magnets

The LDC1612 and LDC1614 are 2- and 4-channel, 28-bit inductance to digital converters (LDCs) for inductive sensing solutions. With multiple channels and support for remote sensing, the LDC1612 and LDC1614 enable the performance and reliability benefits of inductive sensing to be realized at minimal cost and power. The products are easy to use, only requiring that the sensor frequency be within 1 kHz and 10 MHz to begin sensing. The wide 1 kHz to 10 MHz sensor frequency range also enables use of very small PCB coils, further reducing sensing solution cost and size.

The high resolution channels allow for a much larger sensing range, maintaining good performance beyond two coil diameters. Well-matched channels allow for differential and ratiometric measurements, which enable designers to use one channel to compensate their sensing for environmental and aging conditions such as temperature, humidity, and mechanical drift.

Given their ease of use, low power, and low system cost these products enable designers to greatly improve performance, reliability, and flexibility over existing sensing solutions and to introduce brand new sensing capabilities to products in all markets, especially consumer and industrial applications.

These devices are easily configured via an I2C interface. The two-channel LDC1612 is available in a WSON-12 package and the four-channel LDC1614 is available in a WQFN-16 package.

The LDC1612 and LDC1614 are 2- and 4-channel, 28-bit inductance to digital converters (LDCs) for inductive sensing solutions. With multiple channels and support for remote sensing, the LDC1612 and LDC1614 enable the performance and reliability benefits of inductive sensing to be realized at minimal cost and power. The products are easy to use, only requiring that the sensor frequency be within 1 kHz and 10 MHz to begin sensing. The wide 1 kHz to 10 MHz sensor frequency range also enables use of very small PCB coils, further reducing sensing solution cost and size.

The high resolution channels allow for a much larger sensing range, maintaining good performance beyond two coil diameters. Well-matched channels allow for differential and ratiometric measurements, which enable designers to use one channel to compensate their sensing for environmental and aging conditions such as temperature, humidity, and mechanical drift.

Given their ease of use, low power, and low system cost these products enable designers to greatly improve performance, reliability, and flexibility over existing sensing solutions and to introduce brand new sensing capabilities to products in all markets, especially consumer and industrial applications.

These devices are easily configured via an I2C interface. The two-channel LDC1612 is available in a WSON-12 package and the four-channel LDC1614 is available in a WQFN-16 package.

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Technical documentation

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Type Title Date
* Data sheet LDC1612, LDC1614 Multi-Channel 28-Bit Inductance to Digital Converter (LDC) for Inductive Sensing datasheet (Rev. A) PDF | HTML 25 Mar 2018
Application note Common Inductive and Capacitive Sensing Applications (Rev. B) 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
Application note LDC1612 LDC1614 Linear Position Sensing (Rev. A) 13 Nov 2019
Application note Configuring Inductive-to-Digital-Converters for Parallel Resistance (RP) Variati (Rev. B) 11 Nov 2019
Application note EMI Considerations for Inductive Sensing 22 Feb 2017
Technical article How you can use the LDC racetrack inductor designer tool PDF | HTML 29 Nov 2016
Technical article How to use the LDC calculations tool PDF | HTML 10 Nov 2016
Application note LDC1312, LDC1314, LDC1612, LDC1614 Sensor Status Monitoring 09 Oct 2016
EVM User's guide LDC131x and LDC161x EVM User’s Guide (Rev. A) 21 Sep 2016
Technical article Did you know inductive proximity sensing can be implemented with a single chip? PDF | HTML 25 Apr 2016
Application note Setting LDC1312/4, LDC1612/4, and LDC1101 Sensor Drive Configuration 05 Apr 2016
Application note Inductive Sensing Touch-On-Metal Buttons Design Guide PDF | HTML 30 Mar 2016
Technical article Inductive sensing: setting the sensor current-drive without a fancy impedance anal PDF | HTML 24 Mar 2016
Application note Power Reduction Techniques for the LDC131x/161x for Inductive Sensing PDF | HTML 18 Mar 2016
Technical article Inductive sensing: Are narrow-band LC sensors immune to DC magnetic fields? PDF | HTML 14 Mar 2016
Application note Optimizing L Measurement Resolution for the LDC161x and LDC1101 12 Feb 2016
Technical article Inductive sensing: rethink the button PDF | HTML 16 Dec 2015
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: How to design an inductive sensor with the new WEBENCH Coil Des PDF | HTML 19 Aug 2015
Technical article Inductive sensing: How to sense spring compression PDF | HTML 13 Jul 2015
Technical article Inductive sensing: Improve the ENOB of a multichannel LDC by 4 bits in 3 simple st PDF | HTML 24 Jun 2015
Technical article Inductive sensing: How far can I sense? PDF | HTML 17 Jun 2015
User guide LDC Reference Coils User’s Guide 14 May 2015
Technical article Inductive sensing: How to configure a multichannel LDC system - part 2 PDF | HTML 11 May 2015
Technical article Inductive sensing: How to configure a multichannel LDC system - part 1 PDF | HTML 04 May 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

LDC1612EVM — LDC1612 Evaluation Module for Inductance to Digital Converter with Sample PCB Coils

The LDC1612 Evaluation Module demonstrates the use of inductive sensing technology to sense and measure the presence, position or composition of a conductive target object. The module includes two example PCB sensor coils that connect to the two channels of the LDC1612. An MSP430 (...)

User guide: PDF
Not available on TI.com
Evaluation board

LDCCOILEVM — Reference Coil Board Evaluation Module

The LDCCOILEVM is designed to provide maximum flexibility for system prototyping and allow for experimentation with different coil sizes. It includes 19 unique types of PCB coils that range from long rectangular asymmetric coils to small circular coils 3mm in diameter. Every coil is separated by (...)

User guide: PDF
Not available on TI.com
Firmware

SNOC027 MSP430 Firmware Source Code for Multichannel LDC

Supported products & hardware

Supported products & hardware

Products
Inductive sensor AFEs
LDC1312 2-Ch, 12-bit, general purpose inductance to digital converter LDC1314 4-Ch, 12-bit, general purpose inductance to digital converter LDC1612 2-Ch, 28-bit, high-resolution Inductance to digital converter LDC1614 4-Ch, 28-bit, high-resolution Inductance to digital converter
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

LDC1612 IBIS MODEL

SNIM002.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
Reference designs

TIDA-00508 — 1-Degree Dial Reference Design Using the LDC1314 Inductance-to-Digital Converter

The LDC1314's unique inductive sensing capability is used to implement a contactless rotational position sensing solution that is accurate to 1 degree. It uses standard PCB technology and easily manufactured components to implement a low cost solution.

This reference design uses the LDC1314.  (...)

Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00314 — Touch on Metal Buttons With Integrated Haptic Feedback Reference Design

This reference design uses our inductance-to-digital converter technology to provide a high-precision method to sense button presses on a metal surface and our haptic drivers provide high-quality haptics feedback to the user. TIDA-00314 demonstrates techniques for system design, environmental (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00509 — 16-button Inductive Keypad Reference Design Using the LDC1314 Inductance-to-Digital Converter

The LDC1314's unique inductive sensing capability is used to implement a contactless, 16 button, multi-function keypad. It uses standard PCB technology and easily manufactured components to implement a low cost solution.

This reference design uses the LDC1314.  This reference design can also be (...)

Design guide: PDF
Schematic: PDF
Reference designs

TIDM-INDUCTIVELINEAR — ESI + LDC Inductive Linear Position Sensing Reference Design

Typical implementations of linear position measurements use expensive rare-earth magnets. To lower the overall system cost, this reference design describes the implementation of using the industry’s first inductance-to-digital converters (LDC) from TI for linear position sensing without the (...)
User guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
WSON (DNT) 12 Ultra Librarian

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