Redefine how you sense and measure inductance with LDC1041 and STM32L496AG

LDC 2 Click is based on the LDC1041, an inductance-to-digital converter simultaneously measuring an LC resonator's impedance and resonant frequency from Texas Instruments. This Click board™ is easy to use, requiring only the sensor frequency within 5kHz and 5MHz to begin sensing, and demonstrates the use of inductive sensing technology to sense and measure a conductive target object's presence, position, or composition. In addition, the LDC1041 also measures the oscillation frequency of the LC circuit, which is used to determine the inductance of the LC circuit. The device then outputs a digital value that is inversely proportional to frequency. The LDC measures the inductance change that a conductive target causes when it moves into the inductor's AC magnetic field to provide information about the target's position over a

sensor coil. The inductance shift is caused by eddy currents (circulating currents) generated in the target due to the sensor's magnetic field. These eddy currents generate a secondary magnetic field that opposes the sensor field, causing a shift in the observed inductance, used for precise positioning of the target as it moves laterally over the sensor coil. Also, the LDC1041 has two power modes: Active and Standby Mode. Active Mode enables proximity data and frequency data conversion, while Standby mode represents the default mode on the devices' Power-Up sequence. In Standby Mode, the conversion process is disabled. This Click board™ comes with an example of a PCB sensor coil designed to give the user maximum flexibility. The LDC1041 communicates with MCU using the standard SPI serial interface with a maximum frequency of

4MHz. In addition to this serial interface, one GPIO pin connected to the mikroBUS™ socket is also used. The configurable interrupt pin routed to the INT pin of the mikroBUS™ socket may be configured in three different ways by programming the interrupt Terminal mode register with SPI. An interrupt pin can act as a proximity switch, wake-up feature, or data-ready pin, indicating a valid condition for new data availability. This Click board™ can be operated only with a 5V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. Also, it comes equipped with a library containing functions and an example code that can be used as a reference for further development.

The 32L496GDISCOVERY Discovery kit serves as a comprehensive demonstration and development platform for the STM32L496AG microcontroller, featuring an Arm® Cortex®-M4 core. Designed for applications that demand a balance of high performance, advanced graphics, and ultra-low power consumption, this kit enables seamless prototyping for a wide range of embedded solutions. With its innovative energy-efficient

architecture, the STM32L496AG integrates extended RAM and the Chrom-ART Accelerator, enhancing graphics performance while maintaining low power consumption. This makes the kit particularly well-suited for applications involving audio processing, graphical user interfaces, and real-time data acquisition, where energy efficiency is a key requirement. For ease of development, the board includes an onboard ST-LINK/V2-1

debugger/programmer, providing a seamless out-of-the-box experience for loading, debugging, and testing applications without requiring additional hardware. The combination of low power features, enhanced memory capabilities, and built-in debugging tools makes the 32L496GDISCOVERY kit an ideal choice for prototyping advanced embedded systems with state-of-the-art energy efficiency.