1 to 6-GHz delta-sigma low power dual PLLatinum frequency synthesizer with 3.0-GHz integer PLL
製品の詳細
パラメータ
パッケージ|ピン|サイズ
特長
- Quadruple Modulus Prescaler for Lower Divides
- 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
- Improved Lock Times
- Fastlock / Cycle Slip Reduction With Single-
Word Write to Change Frequencies - Integrated Time-Out Counter
- Fastlock / Cycle Slip Reduction With Single-
- Wide Operating Range
- LMX2487 RF PLL: 1.0 GHz to 6.0 GHz
- Useful Features
- Digital Lock Detect Output
- Hardware and Software Power-Down Control
- On-Chip Input Frequency Doubler
- RF Phase Comparison Detector Up to 50 MHz
- 2.5-V to 3.6-V Operation With ICC = 8.5 mA
概要
The LMX2487 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 LMX2487 is highly resistant to changes in temperature and variations in wafer processing. The LMX2487 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 LMX2487 is transferred through a three-line, high-speed (20-MHz) MICROWIRE interface. The LMX2487 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 LMX2487 is available in a 24-lead 4.0 × 4.0 × 0.8 mm WQFN package.
技術資料
種類 | タイトル | 英語版のダウンロード | 日付 | |
---|---|---|---|---|
* | データシート | LMX2487 1-GHz to 6-GHz High Performance Delta-Sigma Low-Power Dual PLLatinum Frequency Synthesizers With 3-GHz Integer PLL データシート (Rev. C) | 2016年 1月 13日 |
設計と開発
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特長
- Part Selection based on current, cost, phase noise, and package
- Filter Design up for passive and active filters up to 4th Order
- Simulation of phase noise including PLL, Fractional Engine, VCO, Input, Dividers, and Loop Filter
- Simulation of spurs including phase detector and fractional.
- Simulation of (...)
特長
- Program EVMs through the USB2ANY Interface Adaptor or onboard USB interface.
- Export programming configurations for use in end application.
Which software do I use?
Product | Loop (...) |
CAD/CAE シンボル
パッケージ | ピン数 | ダウンロード |
---|---|---|
WQFN (RTW) | 24 | オプションの表示 |
購入と品質
- RoHS
- REACH
- デバイスのマーキング
- リード端子の仕上げ / ボールの原材料
- MSL rating/ リフローピーク温度
- MTBF/FIT の推定値
- 原材料組成
- 認定試験結果
- 継続的な信頼性モニタ試験結果
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