Texas Instruments LMX2571 低功耗合成器
德州仪器 LMX2571 是一款低功耗、高性能、宽带 PLLatinum™ 射频合成器。该合成器集成了 Δ-Σ 型 N 分频 PLL、多核压控振荡器(VCO)、可编程输出分压器以及两个输出缓冲器。VCO 内核的工作频率高达 5.376GHz，持续输出频率范围为 10 MHz 至 1344 MHz。该合成器还可搭配外部 VCO 使用。在此配置下，需使用专用的 5V 电荷泵和输出分压器。它还包含一个独特的可编程乘法器，有助于去除毛刺，这样即使毛刺落在整数边界，系统也仍能够使用每一个通道。
特性
- Any frequency from 10MHz to 1344MHz
- Low phase noise and spurs
- -123dBc/Hz at 12.5kHz Offset @ 480MHz
- -145dBc/Hz at 1MHz Offset @ 480MHz
- Normalized PLL noise floor of -231dBc/Hz
- Spurious better than -75dBc/Hz
- Fastlock to reduce lock time
- A novel technique to remove integer boundary spurs
- Integrated 5V charge pump and output divider for external VCO operation
- 2-, 4- and 8-level or Arbitrary level direct digital FSK modulation
- One TX/RX Output or two fanout outputs
- Crystal, XO or differential reference clock input
- 24-Bit Fractional-N delta sigma modulator
- Low current consumption
- 39mA Typical synthesizer mode (Int. VCO)
- 9mA Typical PLL mode (Ext. VCO)
应用
- Duplex mode digital professional 2-way radio
- dPMR, DMR, PDT, P25 Phase I
- Low power radio communication systems
- Satcom modem
- Wireless microphone
- Wireless connectivity
- Handheld test and measurement equipment
Datasheets
TI Reference Design
Development Tool
Texas Instruments LMX2571EVM评估模块 (EVM)
设计用于评估TI的LMX2571低功耗频率合成器。
发布日期: 2015-04-21
| 更新日期: 2022-10-31