Inductive sensor AFEs
Position detection of conductive targets with contactless magnet-free sensing
Design & development resources
Inductive Touch Stainless Steel Keypad Reference Design for Waterproof/Noise Immune HMI Applications
Inductive Sensing 32-Position Encoder Knob Reference Design using the LDC0851
Reference Coil Board Evaluation Module
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 (...)
Benefits of our inductive sensor AFEs
Interactive touch buttons
Design reliable contactless buttons that operate underwater and in other harsh environments in the presence of gloves with our inductive sensor AFEs.
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.
TI's inductive sensing advantages
Acheive simple, reliable and long-lasting touch-button solutions with inductive sensor AFEs
Benefits:
- The inductive coil's ability to detect various levels of force applied to the surface enables multilevel functionality.
- Less wear and tear on the button surfaces leads to a longer shelf life compared to traditional mechanical buttons.
- Reliable performance in debris-ridden environments.
- No cutouts, holes or moving parts.
- Responsive to gloved fingers.
Common Inductive and Capacitive Sensing Applications (Rev. B)
Inductive Touch System Design Guide for HMI Button Applications (Rev. A)
Inductive Touch Buttons for Wearables (Rev. A)
Use inductive sensor AFEs to detect increments and decrements in position
Benefits:
- No calibration required.
- Low cost.
- Dust and dirt resistant.
- Not affected by magnets.
- Can measure more than 300 events per second.
- Minimal microcontroller memory and instructions required.
Common Inductive and Capacitive Sensing Applications (Rev. B)
Sensor Design for Inductive Sensing Applications Using LDC (Rev. C)
Detect the strength, proximity and presence of metal with inductive sensor AFEs
- Can detect the presence and proximity of metal, the level of compression of a spring and measure the speed and position of a rotational system (like gear tooth counting, for example) to meet system needs
- Can detect the presence, strength and proximity of an external metal to prevent tampering
- Sensor is simply a PCB coil and the target is any metallic material, which enables smaller form factors and lower costs
- Has a sensing distance of up to 200% of coil diameter with LDC161x family to be able to acheive longer range sensing
Common Inductive and Capacitive Sensing Applications (Rev. B)
Inductive Sensing for LDC3114 Metal Proximity Detection
Gain immunity to external magnetic fields that could disrupt your system with inductive sensor AFEs
Benefits:
- Inherent immunity to broadband noise and targeted frequency ranges that fall outside the resonant frequency range.
- Internal electromagnetic interference (EMI) and deglitch filters prevent high-frequency signals from disrupting the circuitry after the sensors, increasing resiliency to EMI.
- The prevention of external magnetic fields from affecting device and system behavior acts as a safety feature.
EMI Considerations for Inductive Sensing
Electromagnetic Interference Testing Using the LDC3114
Featured products for external magnetic field immunity
High speed rotational position sensing
Benefits:
- Integrated analog front-end IC for contact-less, inductive position sensors for absolute rotary position from 0° to 360°
- High resolution and accuracy of ≤ 1 degree at rotational speeds up to 480,000 RPM
- Functional Safety-Compliant with LDC5072-Q1 with systematic and hardware capability up to ASIL C
- Supports operation in harsh environments; immune to stray magnetic fields, dirt, and contamination
- Extensive IC, sensor input, output, and supply pin diagnostics