LMX2485Q-Q1 - Texas Instruments

LMX2485Q-Q1 High Performance Delta-Sigma Low Power Dual PLLatinum Frequency Synthesizers

The LMX2485Q-Q1 is a low power, high performance delta-sigma fractional-N PLL with an auxiliary integerN PLL. The device is fabricated using TI’s advanced process. With delta-sigma architecture, fractional spurs at lower offset frequencies are pushed to higher frequencies outside the loop bandwidth. The ability to push close in spur and phase noise energy to.

Features

•1 Quadruple Modulus Prescaler for Lower Divides
  – RF PLL: 8/9/12/13 or 16/17/20/21
  – IF PLL: 8/9 or 16/17
• Advanced Delta Sigma Fractional Compensation
  – 12-Bit or 22-Bit Selectable Fractional Modulus
  – Up to 4th Order Programmable Delta-Sigma Modulator
• Improved Lock Times and Programming
  – Fastlock / Cycle Slip Reduction Requiring Only a Single-Word Write
  – Integrated Time-Out Counter
• Wide Operating Range
  – LMX2485Q-Q1 RF PLL: 500 MHz to 3.1 GHz
• Useful Features
  – Digital Lock Detect Output
  – Hardware and Software Power-Down Control
  – On-Chip Input Frequency Doubler
  – RF Phase Detector.