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LMX2505LQ1321 from NATIONAL,National Semiconductor

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LMX2505LQ1321

Manufacturer: NATIONAL

Dual Frequency Synthesizer System with Integrated VCOs

Partnumber Manufacturer Quantity Availability
LMX2505LQ1321 NATIONAL 2000 In Stock

Description and Introduction

Dual Frequency Synthesizer System with Integrated VCOs The LMX2505LQ1321 is a high-performance PLLatinum™ RF synthesizer manufactured by National Semiconductor (now part of Texas Instruments). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Frequency Range:** 550 MHz to 2.5 GHz  
- **Supply Voltage:** 3.0V to 3.6V  
- **Phase Noise Performance:**  
  - -100 dBc/Hz at 10 kHz offset (at 900 MHz)  
  - -130 dBc/Hz at 100 kHz offset (at 900 MHz)  
- **Reference Input Frequency:** Up to 200 MHz  
- **Charge Pump Current:** Programmable (0.31 mA to 5 mA)  
- **Package:** 32-Lead LQFP (7x7 mm)  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**
- The LMX2505LQ1321 is a low-noise, integer-N frequency synthesizer designed for wireless communication applications.  
- It integrates a high-performance phase-locked loop (PLL) with a low-noise voltage-controlled oscillator (VCO).  
- Suitable for GSM, CDMA, WCDMA, and other wireless standards.  

### **Features:**
- **Low Phase Noise:** Optimized for high-performance RF applications.  
- **Programmable Output Power:** Adjustable output level for different system requirements.  
- **Fast Lock Time:** Supports quick frequency switching.  
- **Integrated VCO:** Eliminates the need for external VCO components.  
- **Serial Interface:** SPI-compatible control for easy programming.  
- **Power-Saving Modes:** Supports low-power operation when idle.  

This synthesizer is widely used in base stations, repeaters, and other RF communication systems requiring precise frequency generation.

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