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射频和微波
射频 PLL 和合成器

LMX2487E

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用于射频个人通信的 3GHz 至 7.5GHz Δ-Σ 低功耗双路 PLL

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LMX2487E

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产品详情

Frequency (max) (MHz) 7500 Frequency (min) (MHz) 3000 Normalized PLL phase noise (dBc/Hz) -210 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -104 Features Advanced delta-sigma fractional compensation, Cycle slip reduction, Dual PLL, Fastlock, Integrated timeout counter, On-chip input frequency doubler Current consumption (mA) 5.7 Integrated VCO No Operating temperature range (°C) -40 to 85 Rating Catalog Lock time (µs) (typ) (s) Loop BW dependent
Frequency (max) (MHz) 7500 Frequency (min) (MHz) 3000 Normalized PLL phase noise (dBc/Hz) -210 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -104 Features Advanced delta-sigma fractional compensation, Cycle slip reduction, Dual PLL, Fastlock, Integrated timeout counter, On-chip input frequency doubler Current consumption (mA) 5.7 Integrated VCO No Operating temperature range (°C) -40 to 85 Rating Catalog Lock time (µs) (typ) (s) Loop BW dependent
WQFN (RTW) 24 16 mm² 4 x 4
  • 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 7.5 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
  • 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 7.5 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

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. The ability to push close in spur and phase noise energy to higher frequencies is a direct function of the modulator order. Unlike analog compensation, the digital feedback technique used in the LMX2487E is highly resistant to changes in temperature and variations in wafer processing. The LMX2487E delta-sigma modulator is programmable up to fourth order, which allows the designer to select the optimum modulator order to fit the phase noise, spur, and lock time requirements of the system.

Serial data for programming the LMX2487E is transferred through a three-line, high-speed (20-MHz) MICROWIRE interface. The LMX2487E offers fine frequency resolution, low spurs, fast programming speed, and a single-word write to change the frequency. This makes it ideal for direct digital modulation applications, where the N-counter is directly modulated with information. The LMX2487E is available in a 24-lead 4.0 × 4.0 × 0.8 mm WQFN package.

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. The ability to push close in spur and phase noise energy to higher frequencies is a direct function of the modulator order. Unlike analog compensation, the digital feedback technique used in the LMX2487E is highly resistant to changes in temperature and variations in wafer processing. The LMX2487E delta-sigma modulator is programmable up to fourth order, which allows the designer to select the optimum modulator order to fit the phase noise, spur, and lock time requirements of the system.

Serial data for programming the LMX2487E is transferred through a three-line, high-speed (20-MHz) MICROWIRE interface. The LMX2487E offers fine frequency resolution, low spurs, fast programming speed, and a single-word write to change the frequency. This makes it ideal for direct digital modulation applications, where the N-counter is directly modulated with information. The LMX2487E is available in a 24-lead 4.0 × 4.0 × 0.8 mm WQFN package.
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* 数据表 LMX2487E 7.5-GHz, High-Performance, Delta-Sigma Low-Power Dual PLLatinum Frequency Synthesizers With 3-GHz Integer PLL 数据表 (Rev. B) PDF | HTML 2016年 1月 13日

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软件编程工具

CODELOADER — CodeLoader Device Register Programming v4.19.0

The CodeLoader 4 software is used to program the LMX PLLs and LMK timing devices through either the USB or line print terminal (LPT) port of a computer. This software also provides information on how to program the device by showing the bits that are actually sent.

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CLOCKDESIGNTOOL — Clock Design Tool Software

The Clock Design Tool software helps with part selection, loop filter design and simulation of timing device solutions. When you enter desired output frequencies and a reference frequency (optional), the tool provides TI devices to meet the specified requirements, divider values and a recommended (...)

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TICSPRO-SW — TICS Pro GUI and Live Programming Tool for Clocking Devices

Texas Instruments clocks and synthesizers (TICS) pro software is used to program the evaluation modules (EVMs) for product numbers with these prefixes: CDC, LMK and LMX. These products include phase-locked loops and voltage-controlled oscillators (PLL+VCO), synthesizers and clocking devices.

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CLOCK-TREE-ARCHITECT — 时钟树架构编程软件

时钟树架构是一款时钟树综合工具，可根据您的系统要求生成时钟树解决方案，从而帮助您简化设计流程。该工具从庞大的时钟产品数据库中提取数据，然后生成系统级多芯片时钟解决方案。
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PLLATINUMSIM-SW — PLL loop filter, phase noise, lock time, and spur simulation tool

PLLATINUMSIM-SW is a simulation tool that allows users to create detailed designs and simulations of our PLLatinum™ integrated circuits, which include the LMX series of phase-locked loops (PLLs) and synthesizers.

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WQFN (RTW) 24 Ultra Librarian
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  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
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  • 制造厂地点
  • 封装厂地点

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