Differential inductive switch for MCU-less applications
Product details
Parameters
Package | Pins | Size
Features
- Threshold tolerance: <1 % of coil diameter
- Temperature stable switching operation
- Average Supply Current: < 20 µA @ 10 sps
- Shutdown Supply Current: 140 nA
- Push-pull output
- Resistor Programmable Threshold
- Insensitive to DC Magnetic Fields
- Contactless Switching Operation
- Sample Rate up to 4 ksps
- Supply Voltage: 1.8 V – 3.3 V
- Operating Temperature Range: –40 to 125 °C
Description
The LDC0851 is a close range inductive switch ideal for contactless and robust applications such as presence detection, event counting, and simple buttons.
The switch is triggered when a conductive object comes within close proximity of the sensing coil. Hysteresis is included to ensure a reliable switching threshold immune to mechanical vibration. The differential implementation prevents false triggering over environmental factors such as temperature variation or humidity effects.
Inductive sensing technology provides reliable and accurate sensing even in the presence of dirt, oil, or moisture making it ideal for use in harsh or dirty environments. The solid state switching eliminates the failures due to reed, mechanical, or contact switching. Unlike competitive products, the LDC0851 does not require magnets, nor is it affected by DC magnetic fields.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The LDC0851 evaluation module demonstrates inductive sensing technology to accurately detect the presence of a conductive target passing a fixed threshold. The evaluation module includes a perforated and interchangeable 4-layer PCB where both the sensing coil and reference coil are stacted for (...)
Features
- 1.8V - 3.3 V operating voltage
- Includes a stacked coil for rapid prototyping
- Push/Pull output
- Adjustable switching distance threshold for evaluating a wide variety of use cases
- No GUI or MCU required
- Temperature and other environmental variation compensated by matching sense and reference coils
Design tools & simulation
Reference designs
Design files
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download TIDA-01377 BOM Files.zip (404KB) -
download TIDA-01377 Layer Plots.zip (462KB) -
download TIDA-01377 CAD Files.zip (422KB) -
download TIDA-01377 Gerber.zip (446KB)
Design files
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download TIDA-00851-LDC0851 BOM.pdf (90KB) -
download TIDA-00851-LDC0851 Assembly Drawing .pdf (169KB) -
download TIDA-00851-LDC0851 PCB.pdf (1161KB) -
download TIDA-00851-LDC0851 CAD Files.zip (825KB) -
download TIDA-00851-LDC0851 Gerber .zip (1114KB)
Design files
-
download TIDA-00828 BOM.pdf (215KB) -
download TIDA-00828 Assembly Drawing.pdf (178KB) -
download TIDA-00828 PCB.pdf (1195KB) -
download TIDA-00828 CAD Files.zip (554KB) -
download TIDA-00828 Gerber.zip (564KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
WSON (DSG) | 8 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
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