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LMX2581E

現行

具整合式 VCO 的 3.8GHz 寬頻頻率合成器

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產品規格表

LMX2581E

現行
產品規格表 立即訂購

產品詳細資料

Frequency (max) (MHz) 3800 Frequency (min) (MHz) 50 Normalized PLL phase noise (dBc/Hz) -229 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -125 Features Integrated VCO, Wideband Current consumption (mA) 178 Integrated VCO Yes Operating temperature range (°C) -40 to 85 Rating Catalog Lock time (µs) (typ) (s) 10
Frequency (max) (MHz) 3800 Frequency (min) (MHz) 50 Normalized PLL phase noise (dBc/Hz) -229 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -125 Features Integrated VCO, Wideband Current consumption (mA) 178 Integrated VCO Yes Operating temperature range (°C) -40 to 85 Rating Catalog Lock time (µs) (typ) (s) 10
WQFN (RTV) 32 25 mm² 5 x 5
  • Output Frequency from 50 to 3800 MHz
  • Input Clock Frequency up to 900 MHz
  • Phase Detector Frequency up to 200 MHz
  • Supports Fractional and Integer Modes
  • –229 dBc/Hz Normalized PLL Phase Noise
  • –120.8 dBc/Hz Normalized PLL 1/f Noise
  • –137 dBc/Hz VCO Phase Noise at 1 MHz offset
    for a 2.5 GHz Carrier
  • 100 fs RMS Jitter in Integer Mode
  • Programmable Fractional ModulatorOrder
  • Programmable Fractional Denominator
  • Programmable Output Power up to 12 dBm
  • Programmable 32 Level Charge Pump Current
  • Programmable Option to Use an External VCO
  • Digital Lock Detect
  • 3-Wire Serial Interface and Readback
  • Single Supply Voltage from 3.15 V to 3.45 V
  • Supports Logic Levels down to 1.6 V
  • Output Frequency from 50 to 3800 MHz
  • Input Clock Frequency up to 900 MHz
  • Phase Detector Frequency up to 200 MHz
  • Supports Fractional and Integer Modes
  • –229 dBc/Hz Normalized PLL Phase Noise
  • –120.8 dBc/Hz Normalized PLL 1/f Noise
  • –137 dBc/Hz VCO Phase Noise at 1 MHz offset
    for a 2.5 GHz Carrier
  • 100 fs RMS Jitter in Integer Mode
  • Programmable Fractional ModulatorOrder
  • Programmable Fractional Denominator
  • Programmable Output Power up to 12 dBm
  • Programmable 32 Level Charge Pump Current
  • Programmable Option to Use an External VCO
  • Digital Lock Detect
  • 3-Wire Serial Interface and Readback
  • Single Supply Voltage from 3.15 V to 3.45 V
  • Supports Logic Levels down to 1.6 V

The LMX2581E is a low-noise wideband frequency synthesizer that integrates a delta-sigma fractional N PLL, multiple core VCO, programmable output divider, and two differential output buffers. The VCO frequency range is from 1880 to 3800 MHz and can be sent directly to the output buffers or divided down by even values from 2 to 38. Each buffer is capable of output power from –3 to +12 dBm at 2700 MHz. Integrated low-noise LDOs are used for superior noise immunity and consistent performance.

This synthesizer is a highly programmable device and it enables the user to optimize its performance. In fractional mode, the denominator and the modulator order are programmable and can be configured with dithering as well. The user also has the ability to directly specify a VCO core or entirely bypass the internal VCO. Finally, many convenient features are included such as power down, Fastlock, auto mute, and lock detection. All registers can be programmed through a simple 3-wire interface and a read back feature is also available.

The LMX2581E operates on a single 3.3 V supply and comes in a 32 pin 5.0 mm × 5.0 mm WQFN package.

The LMX2581E is a low-noise wideband frequency synthesizer that integrates a delta-sigma fractional N PLL, multiple core VCO, programmable output divider, and two differential output buffers. The VCO frequency range is from 1880 to 3800 MHz and can be sent directly to the output buffers or divided down by even values from 2 to 38. Each buffer is capable of output power from –3 to +12 dBm at 2700 MHz. Integrated low-noise LDOs are used for superior noise immunity and consistent performance.

This synthesizer is a highly programmable device and it enables the user to optimize its performance. In fractional mode, the denominator and the modulator order are programmable and can be configured with dithering as well. The user also has the ability to directly specify a VCO core or entirely bypass the internal VCO. Finally, many convenient features are included such as power down, Fastlock, auto mute, and lock detection. All registers can be programmed through a simple 3-wire interface and a read back feature is also available.

The LMX2581E operates on a single 3.3 V supply and comes in a 32 pin 5.0 mm × 5.0 mm WQFN package.
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* Data sheet LMX2581E Wideband Frequency Synthesizer with Integrated VCO datasheet PDF | HTML 2015年 7月 27日

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LMX2581EVM — LMX2581 評估模組

LMX2581 寬頻頻率合成器可產生各種頻率，且相位雜訊極低。LMX2581 參考電路板 (LMX2581EVM) 旨在輔助評估系統中的 LMX2581，同時當做客戶系統的參考設計。除參考電路板套件外，只需一台 PC 和相位雜訊分析器即可使用。此評估板可透過為配套使用而開發的 CodeLoader 進行評估和控制。CodeLoader 軟體能透過該裝置進行全面控制，同時還能由 Active X 透過程式 (如 Excel 和 Labview) 進行呼叫。此板的功能旨在獲得最大的靈活性和便利性。預設配置 XO (...)

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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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LMX2581 IBIS Model

SNAM157.ZIP (54 KB) - IBIS Model
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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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