LM2917M-8

Product Overview

Category

The LM2917M-8 belongs to the category of integrated circuits (ICs) specifically designed for frequency-to-voltage conversion.

Use

This product is commonly used in applications that require converting a frequency signal into a corresponding analog voltage output. It finds extensive use in various electronic systems, including automotive speedometers, tachometers, and RPM (revolutions per minute) indicators.

Characteristics

• Frequency-to-voltage conversion: The LM2917M-8 efficiently converts frequency signals into proportional analog voltage outputs.
• Wide input frequency range: It can handle a broad range of input frequencies, making it suitable for diverse applications.
• High accuracy: The IC provides precise and reliable frequency-to-voltage conversion, ensuring accurate measurement and control.
• Low power consumption: The LM2917M-8 operates with low power requirements, making it energy-efficient.
• Compact package: This IC is available in a compact package, allowing for easy integration into various electronic systems.

Package and Quantity

The LM2917M-8 is typically packaged in a small outline integrated circuit (SOIC) package. It is commonly available in reels or tubes containing multiple units, facilitating mass production and assembly processes.

Specifications

The LM2917M-8 has the following specifications:

• Input Voltage Range: 4V to 18V
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Conversion Linearity Error: ±1%
• Supply Current: 2.5mA (typical)

Pin Configuration

The LM2917M-8 features an eight-pin configuration, as follows:

1. Frequency Input (FIN)
2. Ground (GND)
3. Frequency Threshold (FTH)
4. Voltage Reference (VREF)
5. Feedback (FB)
6. Output Voltage (VOUT)
7. Supply Voltage (VCC)
8. Frequency Compensation (FCOMP)

Functional Features

The LM2917M-8 offers the following functional features:

• Frequency-to-voltage conversion: It accurately converts the input frequency signal into a corresponding analog voltage output.
• Adjustable frequency threshold: The FTH pin allows users to set a specific frequency threshold for triggering the voltage output.
• Feedback loop: The FB pin enables feedback control, ensuring stability and accuracy in the conversion process.
• Voltage reference: The VREF pin provides a stable reference voltage for precise conversion.

Advantages and Disadvantages

Advantages

• High accuracy and linearity in frequency-to-voltage conversion.
• Wide input frequency range accommodates various applications.
• Low power consumption ensures energy efficiency.
• Compact package facilitates easy integration into electronic systems.

Disadvantages

• Limited output voltage range may not be suitable for certain applications requiring higher voltage levels.
• Requires external components for proper operation and calibration.

Working Principles

The LM2917M-8 operates based on the principle of frequency-to-voltage conversion. It utilizes an internal oscillator to generate a reference frequency and compares it with the input frequency signal. The IC then produces an analog voltage output proportional to the input frequency.

Application Field Plans

The LM2917M-8 finds extensive application in various fields, including:

1. Automotive industry: Used in speedometers, tachometers, and RPM indicators to convert wheel or engine rotation frequencies into voltage signals for accurate speed measurement.
2. Industrial automation: Employed in machinery and equipment to monitor rotational speeds, enabling precise control and synchronization.
3. Energy management: Integrated into power generation systems to measure and monitor the frequency of alternating current (AC) signals, facilitating efficient energy management.

Alternative Models

For those seeking alternative options, the following models provide similar functionality to the LM2917M-8:

1. LM2907: This IC offers frequency-to-voltage conversion with adjustable gain and a wider input voltage range.
2. MAX038: A function generator IC that includes frequency-to-voltage conversion capabilities, suitable for waveform generation applications.
3. XR4151: Provides frequency-to-voltage conversion along with phase-locked loop (PLL) functionality, enabling precise frequency tracking and control.

In conclusion, the LM2917M-8 is a versatile integrated circuit designed for accurate frequency-to-voltage conversion. Its wide application range, compact package, and high accuracy make it an ideal choice for various electronic systems requiring precise frequency measurement and control.