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Inductive sensor AFEs

Position detection of conductive targets with contactless magnet-free sensing

Achieve sub-micron resolution in position sensing applications with inductive sensor analog-front-ends (AFEs) and inductance-to-digital (LDC) converters that are immune to direct current (DC) magnetic fields and do not require magnets for operation. Our inductive sensor AFEs are reliable in harsh environments because of their contactless nature.

Interactive touch buttons

Design reliable contactless buttons that operate underwater and other harsh environments and in the presence of gloves with our inductive sensor AFEs offering high-accuracy and configurable force detection.

Event counting

Implement reliable, simple solutions for incremental encoder knobs and event counting of up to 300 events per second with our inductive sensor AFEs.

Metal proximity detection

Detect the presence of conductive materials with micrometer precision with our inductive sensor AFEs in proximity or position sensing applications.

Inductive sensor AFE product comparison

LDC1614

LDC1314

LDC3114-Q1

LDC2114

LDC0851

Primary application
Metal proximity detection
Metal proximity detection
Metal proximity detection or touch buttons
Touch buttons
Incremental encoder and event counting
Secondary application
Touch buttons
Touch buttons
no
no
Metal proximity detection
Resolution
28-bit
12-bit
24-bit (raw data)
12-bit (button)
12-bit
no

Output type
I2C
I2C
I2C or push-pull
I2C or push-pull
Push-pull
Features
Raw code digital output
Raw code digital output
Raw code digital output
MCU-less operation
Baseline-compensated output
Baseline-compensated output
MCU-less operation
Switch output
MCU-less operation
Automotive qualified
yes
yes
yes
no
no
Supply voltage
2.7 V to 3.6 V
2.7 V to 3.6 V
1.8 V
1.8 V
1.8 V to 3.3 V

Inductive sensor AFE design & development tools

Inductive touch stainless steel keypad

16-button keypad made from a single piece of 0.6-mm thick stainless steel metal.

Inductive sensing 32-position encoder knob using LDC0851

An inductive sensing based incremental encoder knob design can provide a robust and low-cost interface for control inputs.  It can reliably operate in environments that have dirt, moisture or oil which can cause issues for alternate sensing technologies. This solution requires no magnets.

LDCCOILEVM reference coil board evaluation module

With 19 unique types of PCB coils that range from long rectangular asymmetric coils to small circular coils that are 3 mm in diameter, the LDCCOILEVM is designed to provide maximum flexibility for system prototyping allowing experimentation with different coil sizes

Inductive sensor AFE technical resources

Build your expertise with TI Precision Labs - Inductive Sensing

TI Precision Labs is the electronics industry’s most comprehensive online classroom for analog engineers. This modular, on-demand curriculum includes hands-on training videos that combine theory and applied exercises to quickly bring you up to speed with inductive sensing design covering the basics of inductive sensing, key common applications and resources to get started on your design.

Use our inductive sensor calculator to find the optimal device configuration based on your system requirements.

Learn about the benefits of using inductive and capacitive sensing technology and our available design resources.

Read our device selection guide to determine the best device for your design.