5V, High Resolution, Inductance to Digital Converter for Inductive Sensing Applications - LDC1000


5V, High Resolution, Inductance to Digital Converter for Inductive Sensing Applications


Inductive Sensing is a contact-less, short-range sensing technology that enables low-cost, high-resolution sensing of conductive targets in the presence of dust, dirt, oil, and moisture, making it extremely reliable in hostile environments. Using a coil which can be created on a PCB as a sensing element, the LDC1000 enables ultra-low cost system solutions.

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

The LDC1000 is the world’s first inductance-to-digital converter, offering the benefits of inductive sensing in a low-power, small-footprint solution. The product is available in a SON-16 package and offers several modes of operation. An SPI interface simplifies connection to an MCU.


  • Magnet-Free Operation
  • Sub-Micron Precision
  • Adjustable Sensing Range (through Coil Design)
  • Lower System Cost
  • Remote Sensor Placement (Decoupling the LDC
    from Harsh Environments)
  • High Durability (by Virtue of Contact-Less
  • Insensitivity to Environmental Interference
    (such as Dirt, Dust, Water, Oil)
  • Supply Voltage, Analog: 4.75 V to 5.25 V
  • Supply Voltage, IO: 1.8 V to 5.25 V
  • Supply Current (w/o LC Tank): 1.7 mA
  • Rp Resolution: 16-Bit
  • L Resolution: 24-Bit
  • LC Frequency Range: 5 kHz to 5 MHz

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Parametrics Compare all products in Inductance to Digital Converter

# Input Channels
Approx. Price (US$)
L (Inductance) Resolution (Bits)
Sensor Frequency (Hz)
Rp (Parallel Resonance Impedance) Resolution (Bits)
Operating Temperature Range (C)
LDC1000 LDC1000-Q1 LDC1041 LDC1312 LDC1314 LDC1612 LDC1614
1     1     1     2     4     2     4    
2.95 | 1ku     3.39 | 1ku     2.50 | 1ku     2.38 | 1ku     3.50 | 1ku     3.25 | 1ku     4.75 | 1ku    
SPI     SPI     SPI     I2C     I2C     I2C     I2C    
24     24     24     12     12     28     28    
5k to 5M     5k to 5M     5k to 5M     1k to 10M     1k to 10M     1k to 10M     1k to 10M    
16     16     8            
-40 to 125     -40 to 125
-40 to 150    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
16WSON     16TSSOP     16WSON     12WSON     16WQFN     12WSON     16WQFN    

Other qualified versions of LDC1000

Version Part Number Definition
Automotive LDC1000-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
Inductive Sensing Coil Designer
Use this tool to get started with inductive sensing coil design.
   Distance  (d)     cm   
   Resolution  (r)     μm   
   Diameter of Target  (td)     cm   
   Target Material  (tm)      
   Resolution based on    Rp  L   

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