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The LMX2470 is a low power, high performance delta-sigma fractional-N PLL with an auxiliary integer-N PLL. The device is fabricated using TI’s advanced BiCMOS process.
With delta-sigma architecture, fractional spur compensation is achieved with noise shaping capability of the delta-sigma modulator and the inherent low pass filtering of the PLL loop filter. Fractional spurs at lower frequencies are pushed to higher frequencies outside the loop bandwidth. Unlike analog compensation, the digital feedback techniques used in the LMX2470 are highly resistant to changes in temperature and variations in wafer processing. With delta-sigma architecture, the ability to push close in spur and phase noise energy to higher frequencies is a direct function of the modulator order. The higher the order, the more this energy can be spread to higher frequencies. The LMX2470 has a programmable modulator up to order four, which allows the designer to select the optimum modulator order to fit the phase noise, spur, and lock time requirements of the system.
Programming is fast and simple. Serial data is transferred into the LMX2470 via a three line MICROWIRE interface (Data, Clock, Load Enable). Nominal supply voltage is 2.5 V. The LMX2470 features a typical current consumption of 4.1 mA at 2.5 V. The LMX2470 is available in a 24 lead 3.5 X 4.5 X 0.6 mm package.
| 類型 | 標(biāo)題 | 下載最新的英語(yǔ)版本 | 日期 | |||
|---|---|---|---|---|---|---|
| * | 數(shù)據(jù)表 | LMX2470 2.6 GHz Delta-Sigma Fractional-N PLL with 800 MHz Integer-N PLL 數(shù)據(jù)表 (Rev. B) | 2013年 3月 6日 | |||
| 應(yīng)用手冊(cè) | AN-1879 Fractional N Frequency Synthesis (Rev. B) | 2021年 11月 18日 | ||||
| 用戶指南 | USB Interface Board for use with LMK and LMX User Guide | 2012年 1月 27日 | ||||
| 用戶指南 | 2.6 GHz Delta-Sigma Fractional-N PLL with 800 MHz Integer-N PLL | 2012年 1月 26日 | ||||
| 應(yīng)用手冊(cè) | Delta Sigma PLLs Raise The Standard For Performance | 2003年 3月 5日 |
如需其他信息或資源，請(qǐng)點(diǎn)擊以下任一標(biāo)題進(jìn)入詳情頁(yè)面查看（如有）。
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.
Which software do I use?
Product | (...) |
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.
| 封裝 | 引腳 | CAD 符號(hào)、封裝和 3D 模型 |
|---|---|---|
| ULGA (NPF) | 24 | Ultra Librarian |
Bug fixes