LM2917MX

Product Overview

Category: Integrated Circuit (IC)

Use: Frequency-to-Voltage Converter

Characteristics: - Converts frequency signals into proportional voltage outputs - Suitable for automotive applications, tachometers, speedometers, and RPM indicators - Operates over a wide frequency range - Low power consumption - High linearity and accuracy

Package: SOIC (Small Outline Integrated Circuit)

Essence: The LM2917MX is an integrated circuit that converts frequency signals into corresponding voltage outputs. It is commonly used in automotive applications to measure and display RPM (revolutions per minute) or speed.

Packaging/Quantity: The LM2917MX is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage Range: 4V to 18V
• Frequency Input Range: 0Hz to 10kHz
• Output Voltage Range: 0V to VCC (supply voltage)
• Linearity Error: ±0.2% of full-scale output
• Temperature Range: -40°C to +85°C

Pin Configuration

The LM2917MX has eight pins arranged as follows:

```

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| | --|o |-- VCC --| |-- GND --| |-- FREQ IN --| |-- VOLT OUT --| |-- ADJ --| |-- BYPASS --|_______| ```

1. VCC: Supply voltage input
2. GND: Ground reference
3. FREQ IN: Frequency input signal
4. VOLT OUT: Voltage output proportional to the input frequency
5. ADJ: Adjustment pin for fine-tuning the output voltage
6. BYPASS: Bypass capacitor connection for noise reduction

Functional Features

• Converts frequency signals into proportional voltage outputs
• Wide frequency input range allows for versatile applications
• High linearity and accuracy ensure precise voltage conversion
• Adjustable output voltage through the ADJ pin
• Low power consumption makes it suitable for battery-powered devices

Advantages and Disadvantages

Advantages: - Accurate and linear frequency-to-voltage conversion - Wide operating temperature range - Low power consumption - Versatile application possibilities

Disadvantages: - Limited frequency input range (up to 10kHz) - Requires external components for noise reduction and fine-tuning

Working Principles

The LM2917MX operates based on the principle of frequency-to-voltage conversion. It takes an input frequency signal and converts it into a proportional DC voltage output. The output voltage is directly proportional to the input frequency within the specified range.

Detailed Application Field Plans

The LM2917MX finds extensive use in various automotive applications, including: 1. Tachometers: Measures engine RPM and displays it on the dashboard. 2. Speedometers: Converts wheel rotation frequency into speed readings. 3. RPM Indicators: Provides real-time RPM information for engines or rotating machinery.

Detailed and Complete Alternative Models

1. LM2907: Similar to LM2917MX but with a different package (PDIP).
2. MAX038: Function generator IC capable of generating frequency signals for testing LM2917MX.
3. XR4151: Frequency-to-voltage converter IC with adjustable gain and offset.

These alternative models offer similar functionality to the LM2917MX and can be used as substitutes depending on specific requirements.

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