LDC1314 (ACTIVE)

4-channel, 12-bit Inductance-to-Digital Converter with I2C for Inductive Sensing

 

Description

The LDC1312 and LDC1314 are 2- and 4-channel, 12-bit inductance to digital converters (LDCs) for inductive sensing solutions. With multiple channels and support for remote sensing, the LDC1312 and LDC1314 enable the performance and reliability benefits of inductive sensing to be realized at minimal cost and power. The products are easy to use, only requiring that the sensor frequency be within 1 kHz and 10 MHz to begin sensing. The wide 1 kHz to 10 MHz sensor frequency range also enables use of very small PCB coils, further reducing sensing solution cost and size.

The LDC1312 and LDC1314 offer well-matched channels, which allow for differential and ratiometric measurements. This enables designers to use one channel to compensate their sensing for environmental and aging conditions such as temperature, humidity, and mechanical drift. Given their ease of use, low power, and low system cost these products enable designers to greatly improve on existing sensing solutions and to introduce brand new sensing capabilities to products in all markets, especially consumer and industrial applications. Inductive sensing offers better performance, reliability, and flexibility than competitive sensing technologies at lower system cost and power.

The LDC1312 and LDC1314 are easily configured via an I2C interface. The two-channel LDC1312 is available in a WSON-12 package and the four-channel LDC1314 is available in a WQFN-16 package.

Features

  • Easy-to-use – minimal configuration required
  • Measure up to 4 sensors with one IC
  • Multiple channels support environmental and aging
    compensation
  • Multi-channel remote sensing provideslowest system cost
  • Pin-compatible medium and high-resolution options
    • LDC1312/4: 2/4-ch 12-bit LDC
    • LDC1612/4: 2/4-ch 28-bit LDC
  • Supports wide sensor frequency range of 1kHz to 10MHz
  • Power consumption:
    • 35 µA Low Power Sleep Mode
    • 200 nA Shutdown Mode
  • 3.3V operation
  • Support internal or external reference clock
  • Immune to DC magnetic fields and magnets

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Parametrics Compare all products in Inductance to Digital Converters

 
# Input Channels
Interface
L (Inductance) Resolution (Bits)
Sensor Frequency (Hz)
Rp (Parallel Resonance Impedance) Resolution (Bits)
Operating Temperature Range (C)
Pin/Package
LDC1314 LDC1312 LDC1612 LDC1614
4    2    2    4   
I2C    I2C    I2C    I2C   
12    12    28    28   
1k to 10M    1k to 10M    1k to 10M    1k to 10M   
N/A    N/A    N/A    N/A   
-40 to 125    -40 to 125    -40 to 125    -40 to 125   
16WQFN    12WSON    12WSON    16WQFN   

Other qualified versions of LDC1314

Version Part Number Definition
Automotive LDC1314-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

WEBENCH® Designer LDC1314

 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