1-Ch, 1.8V, 24-bit L, 16-bit Rp, inductance to digital converter for high speed applications


Product details


Applications Metal proximity detection Number of input channels 1 Vs (Max) (V) 3.46 Vs (Min) (V) 1.71 Operating temperature range (C) -40 to 125 open-in-new Find other Inductive sensor AFEs

Package | Pins | Size

VSON (DRC) 10 9 mm² 3 x 3 open-in-new Find other Inductive sensor AFEs


  • Wide Operating Voltage Range: 1.8 V to 3.3 V
  • Sensor Frequency Range: 500 kHz to 10 MHz
  • RP Resolution: 16-Bit
  • L Resolution: 16- or 24-Bit
  • 180-kSPS Conversion Rate
  • Threshold Detection Functionality
  • 1% Part-to-Part Variation in RP Measurement
  • Supply Current:
    • 1.4-µA Shutdown mode
    • 135-µA Sleep mode
    • 1.9-mA Active Mode (no sensor connected)
  • Sub-Micron Distance Resolution Achievable
  • Remote Sensor Placement Isolating the LDC from Harsh Environments
  • Robust Against Environmental Interferences such as Oil, Water, Dirt, or Dust
  • Minimal External Components
  • Magnet-Free Operation
  • Operating Temperature: –40°C to +125°C
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The LDC1101 is a 1.8-V to 3.3-V, high-resolution inductance-to-digital converter for short-range, high-speed, contactless sensing of position, rotation, or motion, enabling reliable, accurate measurements even in the presence of dust or dirt, making it ideal for open or harsh environments.

The LDC1101 features dual inductive measurement cores, allowing for > 150 ksps 16-bit RP and L measurements simultaneous with a high-resolution L measurement which can sample at > 180 ksps with a resolution of up to 24 bits. The LDC1101 includes a threshold-compare function which can be dynamically updated while the device is running.

Inductive sensing technology enables precise measurement of linear/angular position, displacement, motion, compression, vibration, metal composition, and many other applications in markets including automotive, consumer, computer, industrial, medical, and communications. Inductive sensing offers better performance and reliability at lower cost than other, competing solutions.

The LDC1101 offers these benefits of inductive sensing in a small 3-mm × 3-mm 10-pin VSON package. The LDC1101 can be easily configured by a microcontroller using the 4-pin SPI™.

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Technical documentation

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Type Title Date
* Datasheet LDC1101 1.8-V High-Resolution, High-Speed Inductance-to-Digital Converter datasheet (Rev. D) Oct. 03, 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 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 article How to use the LDC calculations tool Nov. 10, 2016
Technical article Did you know inductive proximity sensing can be implemented with a single chip? Apr. 25, 2016
Application note Setting LDC1312/4, LDC1612/4, and LDC1101 Sensor Drive Configuration Apr. 05, 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 LDC1101EVM User's Guide May 29, 2015

Design & development

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

Hardware development

document-generic User guide
The LDC1101 evaluation module demonstrates inductive sensing technology to sense and measure the presence or position of a conductive target. The evaluation board includes an example PCB sensor coil that connects to the LDC1101. An MSP430 microcontroller is used to interface the LDC to a host (...)
  • Demonstrates LDC1101 operation with 1.8V
  • Multiple board perforations provide maximum evaluation and system design flexibility
  • Accompanying GUI for quick concept demonstration and data capture
  • Included detachable sample sensor coil
  • No additional components required for operation
  • Up to 183 ksps output data (...)

Software development

SNOC028F.ZIP (61513 KB)

Design tools & simulation

SNIM009.ZIP (50 KB) - IBIS Model
SLYC137F.ZIP (984 KB)

Reference designs

Inductive Proximity Switch BoosterPack Reference Design
TIDA-00563 The TIDA-00563 TI Design offers highly integrated complete analog front end (AFE) inductance-to-digital converters (LDCs) optimized for use in industrial proximity sensors for contactless and robust applications such as presence detection and event counting. Inductive sensing technology provides (...)
document-generic Schematic document-generic User guide
Inductive Linear Position Sensing Booster Pack Reference Design
TIDA-00460 Typical implementations of distance measurements use expensive rare-earth magnets. To lower overall system cost, this reference design walks through the implementation of industry’s first inductance-to-digital converters from TI for linear position sensing without the use of any expensive (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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VSON (DRC) 10 View options

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