STEVAL-ILD005V1

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Evaluation and Demonstration Boards and Kits (EBKs) are essential for chip and system on chip (SoC) designs. EBKs enable engineers to quickly evaluate conditions and test functionality when developing advanced designs. STEVAL-ILD005V1 is among the many EBKs on the market that feature a wide range of options for engineers, designers, and system integrators. This evaluation board is based on digital phase lock loop (DPLL) technology, which enables engineers to maintain frequency stability in a dynamic environment. This application note covers the STEVAL-ILD005V1 application field, working principle, and mode of operation.

STEVAL-ILD005V1 Application Field

The STEVAL-ILD005V1 evaluation board is designed as an evaluation tool for digital phase lock loop products and for frequency control and stability applications. The board is intended for use in research, development, and manufacturing environments where more efficient and accurate control and frequency stability are required. Application areas for the STEVAL-ILD005V1 board include networked systems, embedded systems, instrumentation, power, automotive, and communication systems.

STEVAL-ILD005V1 Working Principle

The STEVAL-ILD005V1 evaluation board uses digital phase lock loop (DPLL) technology to maintain frequency stability in a dynamic environment. A digital phase lock loop (DPLL) is an electronic system consisting of two mutually-coupled loops: a primary loop and a secondary loop. The primary loop is the main control loop, which is responsible for sensing the input frequency and adjusting the oscillator frequency to maintain a constant Phase difference between the output and input frequencies. The secondary loop then compensates for any drift over time, keeping the phase difference stable.

The STEVAL-ILD005V1 board utilizes the common architecture of a DPLL to control an analog voltage controlled oscillator (VCO). The VCO output is connected to a reference (input) signal and the phase-locked loop (PLL) circuitry constantly attempts to match the output of the VCO to the input. The PLL adjusts the control voltage of the VCO until it senses that the two signals are in-phase. This is achieved through a feedback mechanism, wherein the output of the VCO is compared to the reference signal, and the output signal is used to adjust the VCO\'s control voltage. When the two signals are closely matched, the PLL is said to be in a "locked" state.

STEVAL-ILD005V1 Mode of Operation

The STEVAL-ILD005V1 evaluation board can be used to operate the digital phase lock loop in two different modes. First, it can be used as an open-loop mode, where the reference signal is supplied to the board and controlled by the system. The output of the VCO is then used to lock the phase-locked loop in the open-loop mode. This mode is useful for testing the PLL performance dynamically. Second, the board can be used in a closed-loop mode, whereby the output of the VCO is connected back to the reference signal. The output of the VCO is then used to control the phase-locked loop in the closed-loop mode. This mode is used to attain a precise phase difference between the reference signal and the output of the VCO.

The STEVAL-ILD005V1 evaluation board also includes a built-in temperature sensor, allowing the user to monitor the board\'s temperature. This is especially useful in applications involving high-frequency control, as the temperature of the board can significantly affect the frequency stability of the PLL. The board is also capable of measuring the temperature of the VCO, making it easy to monitor the temperature fluctuations of the device.

The STEVAL-ILD005V1 evaluation board has an easy to use interface, and offers design engineers a cost-effective way to quickly evaluate the performance of a digital phase lock loop circuit. With its temperature sensing capabilities and the ability to operate in both open and closed loop modes, the board can be used in a wide variety of system applications, from communications to instrumentation. The board also comes with software, enabling easy integration with most microcontroller-based systems.

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