LMX2581ESQX/NOPB

Product Overview

Category

The LMX2581ESQX/NOPB belongs to the category of integrated circuits (ICs) and specifically falls under the family of frequency synthesizers.

Use

This product is primarily used in electronic devices that require precise frequency synthesis, such as communication systems, radar systems, and test equipment. It enables the generation of stable and accurate frequencies for various applications.

Characteristics

• High-frequency accuracy and stability
• Wide frequency range coverage
• Low phase noise
• Fast frequency switching capability
• Compact and space-saving design

Package

The LMX2581ESQX/NOPB is available in a small outline integrated circuit (SOIC) package. This package provides mechanical protection and facilitates easy integration into circuit boards.

Essence

The essence of the LMX2581ESQX/NOPB lies in its ability to generate highly accurate and stable frequencies, making it an essential component in modern electronic systems that rely on precise timing and synchronization.

Packaging/Quantity

The LMX2581ESQX/NOPB is typically supplied in reels or tubes, depending on the manufacturer's packaging standards. The quantity per reel or tube may vary but is usually in the range of several hundred units.

Specifications

• Frequency Range: 10 MHz to 15 GHz
• Output Power: Adjustable up to +10 dBm
• Phase Noise: -120 dBc/Hz at 1 MHz offset
• Supply Voltage: 3.3 V
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOIC-16

Detailed Pin Configuration

The LMX2581ESQX/NOPB has a total of 16 pins arranged as follows:

1. VDDA: Analog power supply
2. VDDC: Core power supply
3. VDDP: Phase-locked loop (PLL) power supply
4. GND: Ground reference
5. RFOUT: Output frequency signal
6. VCOIN: Voltage-controlled oscillator (VCO) input
7. VCON: Control voltage input
8. VREG: Reference voltage input
9. VREF: Reference clock input
10. VCOBYP: VCO bypass control
11. LD: Lock detect output
12. MUXOUT: Multiplexer output
13. SDA: Serial data input/output
14. SCL: Serial clock input
15. LE: Load enable input
16. RESET: Reset input

Functional Features

1. Frequency Synthesis: The LMX2581ESQX/NOPB can generate a wide range of frequencies with high accuracy and stability.
2. Fast Frequency Switching: It allows rapid switching between different frequencies, enabling seamless transitions in applications that require dynamic frequency changes.
3. Low Phase Noise: The product exhibits low phase noise characteristics, ensuring minimal interference and improved signal quality.
4. Integrated PLL: The integrated phase-locked loop circuitry ensures precise frequency synchronization and stability.

Advantages and Disadvantages

Advantages

• High-frequency accuracy and stability
• Wide frequency range coverage
• Low phase noise for improved signal quality
• Compact and space-saving design
• Fast frequency switching capability

Disadvantages

• Requires external components for complete functionality
• Limited output power range compared to some other models
• Relatively higher cost compared to simpler frequency synthesis solutions

Working Principles

The LMX2581ESQX/NOPB utilizes a phase-locked loop (PLL) architecture to generate the desired output frequency. It takes an input reference clock and uses a combination of frequency dividers, phase detectors, and voltage-controlled oscillators (VCOs) to synthesize the output frequency. The PLL continuously adjusts the VCO's control voltage based on the phase difference between the reference and output signals, ensuring precise frequency synthesis.

Detailed Application Field Plans

The LMX2581ESQX/NOPB finds applications in various fields, including:

1. Communication Systems: Used in wireless communication systems, such as cellular networks, satellite communication, and Wi-Fi routers, for generating stable carrier frequencies.
2. Radar Systems: Employed in radar systems for accurate frequency generation required for target detection, tracking, and signal processing.
3. Test Equipment: Integrated into test and measurement equipment, such as spectrum analyzers and signal generators, to provide precise and stable reference frequencies for calibration and testing purposes.

Detailed and Complete Alternative Models

1. LMX2594: Offers a higher frequency range of up to 20 GHz and improved phase noise performance.
2. LMX2492: Provides a lower-cost alternative with a reduced frequency range but still maintains good accuracy and stability.
3. LMX1230: Designed for lower-frequency applications with a range of 1 MHz to 1 GHz,