LM2917N Frequency to Voltage Converter by Texas Instruments

The LM2917N by Texas Instruments is a versatile and robust frequency to voltage converter integrated circuit that is an ideal choice for a wide range of applications. This monolithic IC is designed to provide a precise voltage output proportional to an input frequency, making it perfect for use in tachometers, speedometers, and other devices that require frequency to voltage conversion.

The LM2917N comes in a standard 14-pin PDIP (Plastic Dual-In-line Package), ensuring easy integration into various circuit designs. Its operating temperature range from 0°C to +70°C allows it to function reliably in most environmental conditions encountered in consumer electronics.

One of the key features of the LM2917N is its built-in frequency compensation which offers a single, external resistor to set the nominal frequency. Additionally, it has a high input impedance, which ensures that the input signal is not loaded down, preserving signal integrity. With a wide frequency range, the LM2917N can handle inputs from a few Hz to tens of kHz, making it highly adaptable to different use-cases.

The LM2917N also includes a charge pump frequency doubler that allows for either increased sensitivity or reduced ripple. This, along with an onboard zener regulator, provides excellent power supply rejection and ensures stable operation over a range of voltages.

For enhanced versatility, the LM2917N has an op-amp/comparator with an accessible threshold which can be used for over-speed or under-speed detection, or for a variety of other purposes. This makes the LM2917N not just a frequency to voltage converter but also a useful component for signal processing tasks.

Whether it's for automotive applications, motor speed control, or signal processing, the LM2917N from Texas Instruments is the go-to choice for engineers looking for reliability and performance. Its combination of features, ease of use, and robust design make it an essential part of any frequency-based measurement system.