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LDC1101DRCR

TILDC1101DRCR

Texas Instruments
Inductance-to-Digital Converter 24 b 180k SPI 10-VSON (3x3)
Active5,235 in stock

Overview

The LDC1101DRCR is a high-resolution inductance-to-digital converter designed for short-range high-speed inductive sensing applications. It translates the inductance of a sensing coil into a digital output via SPI, enabling precise measurement of position, displacement, or metal composition with 24-bit resolution.

Why Choose This Part

This converter operates over a wide supply range of 1.71V to 3.46V and features a low shutdown current of 1.4 microamps for power-sensitive designs. It supports high-speed sensing with a high sample rate and provides simultaneous measurement of both L and Rp (Equivalent Parallel Resistance).

Applications

High-Speed Position Sensing
Detecting the position of a metal target in high-speed industrial machinery or automotive control systems.
Precision Displacement Measurement
Measuring sub-micron changes in distance between a sensing coil and a conductive target.
Metal Composition Analysis
Differentiating between various types of conductive materials based on eddy current losses.
Flow Meters
Integrating with turbine or gear-based flow meters to detect rotation without physical contact.

Key Specifications

Type Inductance-to-Digital Converter
Mounting Type Surface Mount
Data Interface SPI
Package / Case 10-VFDFN Exposed Pad
Voltage - Supply 1.71V ~ 3.46V
Resolution (Bits) 24 b
Number of Channels 1
Operating Temperature -40degC ~ 125degC
Voltage Supply Source Single Supply
Supplier Device Package 10-VSON (3x3)
Sampling Rate (Per Second) 180k

Getting Started

Engineers can evaluate the device using the LDC1101EVM evaluation module, which interfaces with a PC via USB for data analysis. Firmware development involves configuring the RP_MAX and RP_MIN registers via SPI to match the characteristics of the specific sensor coil and target material.

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