LMH1982SQE
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LMH1982SQE

  • Category:Clock chip
  • Product Name:3G/HD/SD video and audio clock generator
  • Manufacturers:NSC
  • Production Batch Number:11+
  • Encapsulation:LLP
  • Stock Status:There is stock
  • Stock Quantity:16320
  • Minimum order quantity: 1
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  • Product introduction

peculiarity

  • 同时四个A / V时钟产生锁相环
  • PLL1:27或13.5兆赫
  • PLL2:148.5或74.25兆赫
  • PLL3:148.5/1.001或74.25/1.001兆赫
  • PLL4:98.304兆赫/ 2 X (X = 0到15)
  • 3 × 2视频时钟交叉点
  • 灵活的PLL带宽优化抖动性能和锁定时间
  • 软重新同步到新的参考
  • 数字缓缴或损失的参考自由运行
  • 供参考和PLL失锁亏损状态标志
  • 3.3V单电源工作
  • I 2 C接口与地址选择引脚(3国)

illustrate

LMH1983芯片是一种高度集成的可编程的音频/视频(A / V)时钟发生器为广播和专业应​​用而设计。 它可以取代多个PLL和支持SMPTE串行数字视频(SDI)和数字音频AES3/EBU标准应用压控。 它提供了任何SDI发射器的低抖动参考时钟,以满足清洗电路无需额外的时钟输出抖动的严格规范。

LMH1983芯片具有自动输入格式检测,多个A / V输出格式,数字同步锁相或自由运行模式,并覆盖各种自动功能的可编程简单的编程。 在公认的输入格式包括HVF同步的各大视频标准,27兆赫,10兆赫,并32/44.1/48/96千赫音频字时钟。

双级PLL架构集成了三个片上VCO的four锁相环。 第一阶段(PLL1)使用窄环路带宽外部低噪声27MHz的VCXO提供一个清洁的下一阶段的参考时钟。 第二阶段(PLL2,3,4)由三个平行的主要数字A / V时钟的基本税率,包括148.5兆赫,148.5/1.001兆赫和98.304兆赫(4X 24.576兆赫)同时产生VCO的PLL。 每个PLL可以产生时钟和定时脉冲来指示帧(TOF)的顶部。

当锁定为参考,内部10位ADC将跟踪环路滤波器控制电压。 当一个引用(LOR)损失发生时,LMH1983芯片可以通过编程来保存控制电压保持在± 0.5 ppm的前面引用(典型值)的输出精度。 LMH1983芯片可配置为重新同步到一个毛刺少操作前参考。

LMH1983芯片是提供一个节省​​空间的6毫米x 6毫米40引脚LLP封装。


apply

  • 三率(3G/HD/SD)SDI解串器
  • FPGA的参考时钟产生/清洁
  • 音频嵌入/反嵌入
  • camera
  • 帧同步器(同步锁相,DARS)
  • AD / DA转换,编辑,处理卡
  • 键控器和标志插入器
  • 格式/标准转换器
  • 视频显示和投影仪
  • A / V测试和测量设备

andLMH1982SQERelated ICs are:


Model Manufacturers lot number encapsulation illustrate
LMH1982SQE NSC 11+ LLP 3G/HD/SD video and audio clock generator

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