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Product details

Parameters

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 open-in-new Find other Inductive sensor AFEs

Package | Pins | Size

WSON (DNT) 12 16 mm² 4 x 4 open-in-new Find other Inductive sensor AFEs

Features

  • 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

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Description

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

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet LDC1612, LDC1614 Multi-Channel 28-Bit Inductance to Digital Converter (LDC) for Inductive Sensing datasheet (Rev. A) Mar. 25, 2018
Application note Common Inductive and Capacitive Sensing Applications (Rev. A) Mar. 30, 2020
Application note Simulate Inductive Sensors Using FEMM (Finite Element Method Magnetics) Mar. 25, 2020
Application note LDC1612 LDC1614 Linear Position Sensing (Rev. A) Nov. 13, 2019
Application note Configuring Inductive-to-Digital-Converters for Parallel Resistance (RP) Variati (Rev. B) Nov. 11, 2019
Application note LDC Device Selection Guide (Rev. C) Nov. 11, 2019
Application note LDC Sensor Design (Rev. B) Nov. 08, 2019
Application note LDC1xxx LDC Target Design (Rev. A) May 09, 2017
Application note EMI Considerations for Inductive Sensing Feb. 22, 2017
Technical articles How you can use the LDC racetrack inductor designer tool Nov. 29, 2016
Application note LDC1312, LDC1314, LDC1612, LDC1614 Sensor Status Monitoring Oct. 09, 2016
User guide LDC131x and LDC161x EVM User’s Guide (Rev. A) Sep. 21, 2016
Technical articles Did you know inductive proximity sensing can be implemented with a single chip? Apr. 24, 2016
Application note Setting LDC1312/4, LDC1612/4, and LDC1101 Sensor Drive Configuration Apr. 05, 2016
Application note Inductive Sensing Touch-On-Metal Buttons Design Guide Mar. 30, 2016
Technical articles Inductive sensing: setting the sensor current-drive without a fancy impedance analyzer Mar. 24, 2016
Application note Power Reduction Techniques for the LDC131x/161x for Inductive Sensing Mar. 18, 2016
Technical articles Inductive sensing: Are narrow-band LC sensors immune to DC magnetic fields? Mar. 14, 2016
Application note Optimizing L Measurement Resolution for the LDC161x and LDC1101 Feb. 12, 2016
Application note Measuring Rp of an L-C Sensor for Inductive Sensing Oct. 01, 2015
User guide LDC Reference Coils User’s Guide May 14, 2015

Design & development

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

Hardware development

EVALUATION BOARD Download
99
Description

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 (...)

Features
  • Multiple board perforations: provide maximum evaluation and system design flexibility
  • Includes example sensor coils for the different channels
  • Operates via PC
  • Accompanying GUI for quick concept demonstration and data capture
  • EVM design accelerates prototyping of end application
EVALUATION BOARD Download
29
Description

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 (...)

Features
  • 19 different types of coils
  • Perforated edges to separate and use remotely
  • Smaller coils have extra pads for a series inductor

Software development

FIRMWARE Download
SNOC027.ZIP (882 KB)
GUI FOR EVALUATION MODULE (EVM) Download
SNOC028F.ZIP (61513 KB)

Design tools & simulation

SIMULATION MODEL Download
SNIM002.ZIP (26 KB) - IBIS Model
CALCULATION TOOL Download
SLYC137E.ZIP (3713 KB)

Reference designs

REFERENCE DESIGNS Download
Touch on Metal Buttons With Integrated Haptic Feedback Reference Design
TIDA-00314 This TI Design uses Texas Instruments' inductance-to-digital converter technology to provide a high-precision method to sense button presses on a metal surface and TI's Haptic Drivers provide high quality haptics feedback to the user. TIDA-00314 demonstrates techniques for system design (...)
document-generic Schematic
REFERENCE DESIGNS Download
16-button Inductive Keypad Reference Design Using the LDC1314 Inductance-to-Digital Converter
TIDA-00509 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 (...)

document-generic Schematic
REFERENCE DESIGNS Download
ESI + LDC Inductive Linear Position Sensing Reference Design
TIDM-INDUCTIVELINEAR — 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 (...)
document-generic Schematic
REFERENCE DESIGNS Download
1-Degree Dial Reference Design Using the LDC1314 Inductance-to-Digital Converter
TIDA-00508 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.  (...)

document-generic Schematic

CAD/CAE symbols

Package Pins Download
WSON (DNT) 12 View options

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