Wide Operating Voltage Range: 1.8 V to 3.3 V
Sensor Frequency Range: 500 kHz to 10 MHz
R_P Resolution: 16-Bit
L Resolution: 16- or 24-Bit
180-kSPS Conversion Rate
Threshold Detection Functionality
1% Part-to-Part Variation in R_P 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

Wide Operating Voltage Range: 1.8 V to 3.3 V
Sensor Frequency Range: 500 kHz to 10 MHz
R_P Resolution: 16-Bit
L Resolution: 16- or 24-Bit
180-kSPS Conversion Rate
Threshold Detection Functionality
1% Part-to-Part Variation in R_P 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 R_P 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™.

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 R_P 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
*	Data sheet	LDC1101 1.8-V High-Resolution, High-Speed Inductance-to-Digital Converter datasheet (Rev. D)	03 Oct 2016
	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	EMI Considerations for Inductive Sensing	22 Feb 2017
	Technical article	How to use the LDC calculations tool	10 Nov 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	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	LDC1101EVM User's Guide	29 May 2015

Design & development

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

Evaluation board

LDC1101EVM — LDC1101 1.8V, High Resolution Inductance to Digital Converter Evaluation Module

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 (...)

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User guide

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GUI for evaluation module (EVM)

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

SNOC028F.ZIP (61513 KB)

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Simulation model

LDC1101 IBIS MODEL

SNIM009.ZIP (50 KB) - IBIS Model

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Calculation tool

Inductive Sensing Design Calculator Tool (Rev. G)

SLYC137G.ZIP (3737 KB)

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Reference designs

TIDA-00563 — Inductive Proximity Switch BoosterPack Reference Design

TIDA-00563 offers highly-integrated 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 reliable and accurate (...)

Reference designs

TIDA-00460 — Inductive Linear Position Sensing Booster Pack Reference Design

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 (...)