- 制造厂商:AD
- 产品类别:定时IC和时钟
- 技术类目:时钟同步
- 功能描述:双路DPLL、四路输入、10路输出、多服务线路卡时钟转换器和抖动清除器
- (AD代理渠道,提供当日发货、严格的质量标准,满足您的目标价格)
AD9542的10个时钟输出与最多四个输入基准电压源之一同步。数字锁相环(DPLL)可减少与外部基准电压源相关的时序抖动。借助数字控制环路和保持电路,即使所有参考输入都失效,也能持续产生低抖动输出信号。
AD9542采用48引脚LFCSP (7 mm × 7 mm)封装,额定温度范围为?40°C至+85°C。
请注意,在整篇数据手册中,多功能引脚(如SDO/M5)由整个引脚名称或引脚的单个功能表示;例如M5即表示仅与此功能相关。
应用
- SyncE 抖动清除和同步
- 光传输网络(OTN)、SDH、宏和小型蜂窝基站
- 具有抖动净化功能的OTN映射/解映射
- 小型基站时钟,包括基带和无线电
- Stratum 2、Stratum 3e 和 Stratum 3 保持、抖动清除及相位瞬态控制
- JESD204B 支持模数转换器(ADC)和数模转换器(DAC)时钟
- 有线基础设施
- 载波以太网
- 双路DPLL可同步2 kHz至750 MHz物理层时钟,提供高噪声参考源的频率转换以及抖动净化功能
- 符合 ITU-T G.8262 和 Telcordia GR-253 标准
- 支持 Telcordia GR-1244、ITU-T G.812、G.813、G.823、G.824 和 G.825
- 连续频率监控和参考验证,频率偏差低至50 ppb
- 两个DPLL具有24位小数分频器和24位可编程模数
- 可编程数字环路滤波器带宽:10?4 Hz至1850 Hz
- 自动和手动保持和参考切换,提供零延迟、无中断或相位増建操作
- 基于优先级的可编程参考切换,支持手动、自动恢复和自动非恢复模式
- 5对时钟输出引脚,每对引脚均可用作差分LVDS/HCSL/CML或2路单端输出(1 Hz至500 MHz)
- 2 个差分或 4 个单端输入基准电压源
- 交叉点多路复用器将基准输入与 PLL 互连
- 支持嵌入式(调制)输入/输出时钟信号
- 快速DPLL锁定模式
- 提供内部功能,结合晶振或晶体振荡器的低相位噪声以及TCXO或OCXO的频率稳定性和精度
- 为自主初始化提供外部EEPROM支持
- 1.8 V单电源供电,具有内部调节特性
- 内置温度监控/报警和温度补偿,可增强零延迟性能
AD9542BCPZ,封装:48-Lead LFCSP (7mm x 7mm x 0.85mm w/ EP),包装形式及数量:托盘,260,工作温度:-40 to 85C,AD官网报价:10.63(100-499个);8.98(1000+个)
AD9542BCPZ-REEL7,封装:48-Lead LFCSP (7mm x 7mm x 0.85mm w/ EP),包装形式及数量:卷带,750,工作温度:-40 to 85C,AD官网报价:10.63(100-499个);8.98(1000+个)
EVAL-AD9542:AD9542 Evaluation Board
The AD9542 evaluation board is a compact, easy-to-use platform for evaluating all features of the AD9542 dual digital PLL, synchronizer, and jitter cleaner. The AD9542 provides high-precision, multi-output clock generator functions, along with two on-chip jitter cleaning digital PLL cores. PLL0 and PLL1 are optimized for high performance synchronous clocking applications such as Synchronous Ethernet, OTN, and next generation wireless baseband protocols. The PLLs are fully configurable via serial port control as well as configurable via an external EEPROM for power on ready configurations.
The AD9542 can output up to 5 differential (or 10 single-ended) clock signals, plus two single-ended clocks driven by a mix of two high performance digital PLLs. 10 total outputs and 4 reference inputs are accessible on the evaluation board.
The output differential transmission line pairs use 50? single ended characteristic impedance and are connected to standard edge launch SMA connectors. The AD9542/PCBZ has a fully configurable power supply to allow the user to evaluate the AD9542 while being powered directly by a step down switching regulator or external LDOs. The AD9542 evaluation board uses RoHS-compliant FR-4 material. For convenience, detailed information from the AD9542 Datasheet has been included here. Use this user guide in conjunction with the datasheet that has been provided by ADI.