HMC844LC4B - English Editing Encyclopedia Entry

Product Overview

Category

The HMC844LC4B belongs to the category of integrated circuits (ICs) specifically designed for frequency synthesis applications.

Use

This IC is primarily used in electronic systems that require precise frequency generation, such as communication equipment, radar systems, and test and measurement instruments.

Characteristics

• High-frequency accuracy and stability
• Wide frequency range coverage
• Low phase noise performance
• Compact and space-saving package design
• Easy integration into existing circuitry

Package

The HMC844LC4B is packaged in a small form factor, such as a quad flat no-leads (QFN) package. This package type ensures efficient heat dissipation and ease of soldering during assembly.

Essence

The essence of the HMC844LC4B lies in its ability to generate highly accurate and stable frequencies, making it an essential component in various electronic systems.

Packaging/Quantity

The HMC844LC4B is typically available in reels or trays, with a quantity of around 1000 units per reel/tray.

Specifications

• Frequency Range: 10 MHz to 6 GHz
• Output Power: Adjustable up to +10 dBm
• Phase Noise: -120 dBc/Hz at 1 kHz offset
• Supply Voltage: 3.3 V
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The HMC844LC4B features a total of 24 pins, each serving a specific function. The pin configuration is as follows:

1. VCC
2. GND
3. RFout
4. CE
5. LE
6. CLKin
7. REFin
8. VCOin
9. Vtune
10. LD
11. GND
12. GND
13. GND
14. GND
15. GND
16. GND
17. GND
18. GND
19. GND
20. GND
21. GND
22. GND
23. GND
24. GND

Functional Features

• Frequency synthesis with high accuracy and stability
• Programmable frequency divider for flexible output frequency selection
• Integrated phase-locked loop (PLL) for precise frequency control
• Fast switching capability for rapid frequency changes
• Low spurious and harmonic content for clean signal generation

Advantages and Disadvantages

Advantages

• High-frequency accuracy ensures reliable performance in demanding applications.
• Wide frequency range coverage allows for versatile use in various systems.
• Low phase noise performance enables clear signal transmission and reception.
• Compact package design saves valuable board space.
• Easy integration simplifies circuit design and assembly.

Disadvantages

• Limited output power may not be suitable for high-power applications.
• Higher cost compared to some alternative models.
• Requires careful consideration of power supply noise for optimal performance.

Working Principles

The HMC844LC4B utilizes a phase-locked loop (PLL) architecture to generate precise frequencies. The PLL locks onto an external reference input and compares it to the desired output frequency. By adjusting the voltage-controlled oscillator (VCO) frequency, the PLL ensures that the output frequency matches the desired value with high accuracy and stability.

Detailed Application Field Plans

The HMC844LC4B finds extensive application in the following fields:

1. Communication Systems: Used in wireless communication devices, base stations, and satellite communication systems for accurate frequency generation.
2. Radar Systems: Enables precise frequency synthesis in radar systems for target detection and tracking.
3. Test and Measurement Instruments: Essential component in spectrum analyzers, signal generators, and frequency counters for accurate signal analysis and generation.

Detailed and Complete Alternative Models

1. HMC845LC4B: Similar to the HMC844LC4B, but with extended frequency range up to 12 GHz.
2. HMC846LC4B: Offers higher output power capability of up to +15 dBm.
3. HMC847LC4B: Provides improved phase noise performance for ultra-sensitive applications.

These alternative models offer similar functionality to the HMC844LC4B, catering to specific requirements and preferences of different applications.

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