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LMX2487E - Frequency Synthesizers

General Description

The LMX2487E device is a low power, high performance delta-sigma fractional-N PLL with an auxiliary integer-N PLL.

It 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.

Key Features

  • for Improved Lock Time.
  • Fastlock / Cycle Slip Reduction that Requires Single-Word Write.
  • Integrated Time-Out Counter.
  • Wide Operating Range.
  • LMX2487E RF PLL: 3.0 GHz to 7.5 GHz.
  • Useful Features.
  • Digital Lock Detect Output.
  • Hardware and Software Power-Down Control.
  • On-Chip Crystal Reference Frequency Doubler.
  • RF Phase Comparison Frequency Up to 50 MHz.
  • 2.5-V to 3.6-V Operation With ICC = 8.5 mA at 3.0 V 2 App.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LMX2487E SNAS404B – MAY 2007 – REVISED JANUARY 2016 LMX2487E 7.5-GHz, High-Performance, Delta-Sigma Low-Power Dual PLLatinum™ Frequency Synthesizers With 3-GHz Integer PLL 1 Features •1 Quadruple Modulus Prescaler for Lower Divids – RF PLL: 16/17/20/21 or 32/33/36/37 – 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 • Features for Improved Lock Time – Fastlock / Cycle Slip Reduction that Requires Single-Word Write – Integrated Time-Out Counter • Wide Operating Range – LMX2487E RF PLL: 3.0 GHz to 7.