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Home » NEWEST Products » New by Manufacturer » National Semiconductor (TI) » LMX2541 Ultra-Low Noise PLLatinum Frequency Synthesizers - TI
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National Products from Texas Instruments LMX2541 Ultra-Low Noise PLLatinum Frequency Synthesizers
National Products from Texas Instruments LMX2541 Ultra-Low Noise PLLatinum Frequency Synthesizers

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TI LMX2541 Frequency Synthesizers

Texas Instruments LMX2541 Ultra-Low Noise PLLatinum Frequency Synthesizers integrate a high performance delta-sigma fractional N PLL, a VCO with fully integrated tank circuit, and an optional frequency divider. The LMX2541 is offered in a family of 6 devices with varying VCO frequency range from 1990MHz up to 4GHz. The integrated PLL on these devices offers an unprecedented normalized noise floor of -225 dBc/Hz and can be operated with up to 104MHz of phase-detector rate (comparison frequency) in both integer and fractional modes. The PLL can also be configured to work with an external VCO. TI LMX2541 Ultra-Low Noise Frequency Synthesizers integrate several low-noise, high precision LDOs and output driver matching network to provide higher supply noise immunity and more consistent performance,while reducing the number of external components. When combined with a high quality reference oscillator, the LMX2541 generates a very stable, ultra low noise signal.

Features
  • Very Low RMS Noise and Spurs
    • -225dBc/Hz Normalized PLL Phase Noise
    • Integrated RMS Noise (100Hz-20MHz)
      • 2mrad (100Hz-20MHz) at 2.1GHz
      • 3.5mrad (100Hz-20MHz) 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 104MHz 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
  • 1.6V Logic Compatibility
Applications
  • Wireless Infrastructure (UMTS, LTE, WiMax)
  • Broadband Wireless
  • Wireless Meter Reading
  • Test and Measurement

Part Number VCO Frequency (MHz)
LMX2541SQ2060E 1990-2240
LMX2541SQ2380E 2200-2530
LMX2541SQ2690E 2490-2865
LMX2541SQ3030E 2810-3230
LMX2541SQ3320E 3130-3600
LMX2541SQ3740E 3480-4000
  • Texas Instruments