LDC1312-Q1

ACTIVE

2-Ch, 12-bit, general purpose automotive inductance to digital converter

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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

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1:–40°C to +125°C
      Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C5
  • Easy-to-use – Minimal Configuration Required
  • Measure up to 4 Sensors with One IC
  • Multiple Channels Support Environmental and
    Aging Compensation
  • Multi-Channel Remote Sensing Provides Lowest
    System Cost
  • Pin-Compatible Medium and High-resolution Options
    • LDC1312-Q1/LDC1314-Q1: 2/4-ch 12-bit LDC
    • LDC1612-Q1/LDC1614-Q1: 2/4-ch 28-bit LDC
  • Supports Wide Sensor Frequency Range of 1kHz
    to 10MHz
  • Power Consumption:
    • 35 µA Low Power Sleep Mode
    • 200 nA Shutdown Mode
  • 3.3V Operation
  • Support Internal or External Reference Clock
  • Immune to DC Magnetic Fields and Magnets
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Description

The LDC1312-Q1 and LDC1314-Q1 are 2- and 4-channel, 12-bit inductance to digital converters (LDCs) for inductive sensing solutions. With multiple channels and support for remote sensing, the LDC1312-Q1 and LDC1314-Q1 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 LDC1312-Q1 and LDC1314-Q1 offer well-matched channels, which allow for differential and ratiometric measurements. This enables 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 on existing sensing solutions and to introduce brand new sensing capabilities to products in all markets, especially consumer and industrial applications. Inductive sensing offers better performance, reliability, and flexibility than competitive sensing technologies at lower system cost and power.

The LDC1312-Q1 and LDC1314-Q1 are easily configured via an I2C interface. The two-channel LDC1312-Q1 is available in a WSON-12 package and the four-channel LDC1314-Q1 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 LDC1312-Q1, LDC1314-Q1 Multi-Channel 12-Bit Inductance to Digital Converter (LDC) for Inductive Sensing datasheet Apr. 29, 2016
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 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
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
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
Application note Power Reduction Techniques for the LDC131x/161x for Inductive Sensing Mar. 18, 2016
Application note Optimizing L Measurement Resolution for the LDC1312 and LDC1314 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 LDC1312 evaluation module demonstrates inductive sensing technology for sensing and measuring the presence of a conductive target. The evaluation module includes two example PCB sensor coils that connect to the four channels of the LDC1312, and an MSP430 microcontroller is used to interface the (...)

Features
  • Multiple board perforations provide maximum evaluation and system design flexibility
  • Includes example sensor coils for the different channels
  • Accompanying GUI for quick concept demonstration and data capture
  • EVM does not require additional components for operation, enabling rapid device evaluation
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

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

Design tools & simulation

SIMULATION MODEL Download
SNIM004.ZIP (26 KB) - IBIS Model
CALCULATION TOOL Download
SLYC137E.ZIP (3713 KB)

CAD/CAE symbols

Package Pins Download
WSON (DNT) 12 View options

Ordering & quality

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  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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