LM2917M-8

The LM2917M-8 is a versatile frequency-to-voltage converter integrated circuit (IC) produced by Texas Instruments. This device is designed to convert an input frequency signal into a proportional output voltage, making it useful in various applications such as frequency measurement, tachometers, and speed sensors.

Key Features:

1. Frequency Range: The LM2917M-8 can handle a wide range of input frequencies, typically from a few hertz up to several kilohertz, allowing it to be used in diverse applications.

2. Output Voltage: The output voltage is linearly proportional to the input frequency, which means that as the frequency increases, the output voltage also increases. This feature is particularly useful for applications that require a direct voltage representation of frequency.

3. Voltage Supply: The IC operates on a single supply voltage, typically ranging from 4.5V to 40V, making it adaptable to various power supply configurations.

4. Temperature Range: The LM2917M-8 is designed to function effectively over a wide temperature range, ensuring reliable performance in different environmental conditions.

5. Package Type: The "M" in the part number indicates that the device is available in a surface-mount package, specifically an 8-pin SOIC (Small Outline Integrated Circuit) package. This compact form factor is ideal for space-constrained applications.

6. Low Power Consumption: The IC is designed to operate with low power consumption, making it suitable for battery-operated devices and applications where energy efficiency is critical.

7. Applications: Common applications include automotive speedometers, tachometers, frequency counters, and other measurement systems where frequency needs to be converted to a voltage for further processing or display.

8. Internal Components: The LM2917M-8 includes internal components such as a precision voltage reference, a comparator, and a low-pass filter, which help in achieving accurate frequency-to-voltage conversion.

Typical Application Circuit:

In a typical application, the LM2917M-8 would be connected to a frequency source (like a sensor or oscillator). The output voltage can then be fed into an analog-to-digital converter (ADC) or used directly in a display circuit to provide a visual representation of the frequency.

Conclusion:

The LM2917M-8 from Texas Instruments is a robust and efficient frequency-to-voltage converter that offers a range of features suitable for various electronic applications. Its compact design, wide operating range, and low power consumption make it a popular choice among engineers and designers looking to implement frequency measurement and conversion in their projects.