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LDC1314RGHR

TILDC1314RGHR

Texas Instruments
Inductance-to-Digital Converter 12 b I2C 16-WQFN (4x4)
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Overview

The LDC1314RGHR is a 4-channel, 12-bit inductance-to-digital converter (LDC) designed for short-range contactless sensing of conductive targets. It utilizes LC resonators to detect changes in magnetic fields caused by the presence of metal, enabling high-resolution measurements of position, displacement, or material properties via an I2C interface.

Why Choose This Part

The device features four matched channels to support differential measurements for environmental and aging compensation, such as temperature drift. It offers excellent immunity to DC magnetic fields and operates with a wide sensor frequency range from 1 kHz to 10 MHz, providing flexibility in coil design.

Applications

Inductive Keypads
Creating robust, waterproof, and debris-resistant touch interfaces that detect button presses through metal or plastic overlays.
Axial and Linear Position Sensing
High-precision tracking of metal targets for industrial machinery, knobs, or slider controls.
Fluid Level Sensing
Non-contact measurement of liquid levels by detecting a conductive float inside a tank or container.
Metal Composition Detection
Differentiating between types of metal or detecting defects in metal foils based on eddy current variations.

Key Specifications

Type Inductance-to-Digital Converter
Mounting Type Surface Mount
Data Interface I2C
Package / Case 16-WFQFN Exposed Pad
Voltage - Supply 2.7V ~ 3.6V
Resolution (Bits) 12 b
Number of Channels 4
Operating Temperature -40degC ~ 125degC
Voltage Supply Source Single Supply
Supplier Device Package 16-WQFN (4x4)

Getting Started

To evaluate the sensor, use the LDC1314EVM evaluation module which connects to a PC via USB for data analysis. Engineers should design an LC resonator with a frequency between 1 kHz and 10 MHz and configure the device registers over I2C to match the expected sensor oscillation frequency.

Also Consider

LDC1614 TITexas Instruments - Higher resolution 28-bit version for applications requiring extreme precision in displacement sensing.