LMX25312820EVAL/NOPB

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Evaluation and Demonstration Boards and Kits are popular tools used by engineers to help evaluate the application potentials of a given circuit or system. The LMX25312820EVAL/NOPB is a typical example of such evaluation boards and kits. In this article, we will discuss the application field and working principle of the LMX25312820EVAL/NOPB.

The LMX25312820EVAL/NOPB is an Evaluation and Demonstration Board, manufactured by Texas Instruments. It evaluates the differential output voltage level of a precision low-cost Voltage-to-Frequency Converter (VFC). The output voltage can range from 0 volts to 12 volts and can be used in applications such as D/A Converters, Motor Speed Control, Closed-Loop Servo Systems, Stepper Motor Control, Regulated Power Supplies and others. Its power requirement is 5 VDC at 75mA load.

The LMX25312820EVAL/NOPB is mainly used to evaluate the differential output voltage level of a VFC with PWM inputs integrated into the board design. This board has been designed to be able to work in different environments and requires very low levels of power consumption. The output voltage is proportional to the difference between the low-frequency PWM signal and the 1.85 kHz reference signal. The PWM frequency is adjustable in the range of 0.01 to 8 kHz.

The LMX25312820EVAL/NOPB comes with a number of features. It has a VFC onboard with an integrated current mirror, PWM input and indicator LEDs set in three different colors for monitoring the output voltage. It is also equipped with a power supply connector, status LED and a frequency adjuster. All these features along with the voltage feedback loop are connected to the PC through the integrated serial port.

The working principle of the LMX25312820EVAL/NOPB is based on the concept of VFC. The board receives the input of a low frequency PWM signal and is compared to a reference frequency of 1.85 kHz. The output voltage is proportional to the difference between the reference frequency and the input PWM signal. With the integrated PWM input and the voltage feedback loop, it regulates the output voltage level.

In conclusion, the LMX25312820EVAL/NOPB Evaluation and Demonstration Board provides a great platform for evaluating the differential output voltage level of VFCs for a wide variety of applications. The board is designed for low power consumption and easy connection to PCs with integrated serial ports. The board works on the principle of VFC, comparing a low frequency PWM signal to a 1.85 kHz reference frequency and generating an output voltage proportional to the difference between the two.

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