LMX2541SQ2380E/NOPB

锁相环 - PLL Ultra-Low Noise PLL Freq Syn w/ VCO

Description

The LMX2541 device is an ultra low-noise frequency synthesizer which integrates a high-performance delta-sigma fractional N PLL, a VCO with fully integrated tank circuit, and an optional frequency divider. The PLL offers an unprecedented normalized noise floor of –225 dBc/Hz and can be operated with up to 104 MHz of phase-detector rate comparison frequency in both integer and fractional modes. The PLL can also be configured to work with an external VCO.

Features

• Multiple Frequency Options Available See Device Comparison Table

• Frequencies From 31.6 MHz to 4000 MHz

• Very Low RMS Noise and Spurs

• –225 dBc/Hz Normalized PLL Phase Noise

• Integrated RMS Noise 100 Hz to 20 MHz

– 2 mRad 100 Hz to 20 MHz at 2.1 GHz

– 3.5 mRad 100 Hz to 20 MHz at 3.5 GHz

• Ultra Low-Noise Integrated VCO

• External VCO Option Internal VCO Bypassed

• VCO Frequency Divider 1 to 63 All Values

• Programmable Output Power

• Up to 104-MHz Phase Detector Frequency

• Integrated Low-Noise LDOs

• Programmable Charge Pump Output

• Partially Integrated Loop Filter

• Digital Frequency Shift Keying FSK Modulation Pin

• Integrated Reference Crystal Oscillator Circuit

• Hardware and Software Power Down

• FastLock Mode and VCO-Based Cycle Slip Reduction

• Analog and Digital Lock Detect

• 1.6-V Logic Compatibility

Applications

• Wireless Infrastructure UMTS, LTE, WiMax

• Broadband Wireless

• Wireless Meter Reading

• Test and Measurement

• FM Mobile Radio space