Product details

Applications Inductive touch buttons, Encoders/event counters, Metal proximity detection Number of input channels 2 Vs (Max) (V) 3.6 Vs (Min) (V) 2.7 Operating temperature range (C) -40 to 125
Applications Inductive touch buttons, Encoders/event counters, Metal proximity detection Number of input channels 2 Vs (Max) (V) 3.6 Vs (Min) (V) 2.7 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) 25 Mar 2018
Application note Common Inductive and Capacitive Sensing Applications (Rev. B) 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
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 29 Nov 2016
Technical article How to use the LDC calculations tool 10 Nov 2016
Application note LDC1312, LDC1314, LDC1612, LDC1614 Sensor Status Monitoring 09 Oct 2016
User 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? 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 30 Mar 2016
Technical article Inductive sensing: setting the sensor current-drive without a fancy impedance analyzer 24 Mar 2016
Application note Power Reduction Techniques for the LDC131x/161x for Inductive Sensing 18 Mar 2016
Application note Optimizing L Measurement Resolution for the LDC161x and LDC1101 12 Feb 2016
Application note Measuring Rp of an L-C Sensor for Inductive Sensing 01 Oct 2015
User guide LDC Reference Coils User’s Guide 14 May 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 (...)

In stock
Limit: 5
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 (...)

In stock
Limit: 5
GUI for evaluation module (EVM)

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

SNOC028F.ZIP (61513 KB)
Simulation model

LDC1612 IBIS MODEL

SNIM002.ZIP (26 KB) - IBIS Model
Calculation tool

Inductive Sensing Design Calculator Tool (Rev. G)

SLYC137G.ZIP (3737 KB)
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 (...)
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 (...)

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 (...)
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.  (...)

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WSON (DNT) 12 View options

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