LMH1981
- Standard Analog Video Sync Separation for NTSC, PAL, 480I/P, 576I/P, 720P, and 1080I/P/PsF from Composite Video (CVBS),
S-Video (Y/C), and Component Video (YPBPR/GBR) Interfaces - Bi-Level & Tri-Level Sync Compatible
- Composite, Horizontal, and Vertical Sync Outputs
- Burst/Back Porch Timing, Odd/Even Field, and Video Format Outputs
- Superior Jitter Performance on Leading Edge of HSync
- Automatic Video Format Detection
- 50% Sync Slicing for Video Inputs from 0.5 VPP to 2 VPP
- 3.3V to 5V Supply Operation
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The LMH1981 is a high performance multi-format sync separator ideal for use in a wide range of video applications, such as broadcast and professional video equipment and HDTV/DTV systems.
The input accepts standard analog SD/ED/HD video signals with either bi-level or tri-level sync, and the outputs provide all of the critical timing signals in CMOS logic, which swing from rail-to-rail (VCC and GND) including Composite, Horizontal, and Vertical Syncs, Burst/Back Porch Timing, Odd/Even Field, and Video Format Outputs. HSync features very low jitter on its leading (falling) edge, minimizing external circuitry needed to clean and reduce jitter in subsequent clock generation stages.
The LMH1981 automatically detects the input video format, eliminating the need for programming using a microcontroller, and applies precise 50% sync slicing to ensure accurate sync extraction at OH, even for inputs with irregular amplitude from improper termination or transmission loss. Its unique Video Format Output conveys the total horizontal line count per field as an 11-bit binary serial data stream, which can be decoded by the video system to determine the input video format and enable dynamic adjustment of system parameters, i.e.: color space or scaler conversions. The LMH1981 is available in a 14-pin TSSOP package and operates over a temperature range of −40°C to +85°C.
技术文档
| 类型 | 标题 | 下载最新的英语版本 | 日期 | |||
|---|---|---|---|---|---|---|
| * | 数据表 | LMH1981 Multi-Format Video Sync Separator 数据表 (Rev. H) | 2013年 3月 15日 | |||
| 选择指南 | Broadcast and Professional Video Interface Solutions (Rev. E) | 2017年 4月 5日 | ||||
| 应用手册 | Migrating From the LM1881 to the LMH1980 (Rev. A) | 2013年 5月 3日 | ||||
| EVM 用户指南 | AN-1599 LMH1981 Evaluation Board Instruction Manual (Rev. C) | 2013年 4月 26日 | ||||
| EVM 用户指南 | AN-1841 LMH1982 Evaluation Board User Guide (Rev. A) | 2013年 4月 26日 | ||||
| 应用手册 | Demonst SMPTE-Compliant SDI Out Jittr Using LMH1982 & Virtx-5 GTP Xmittr (Rev. A) | 2013年 4月 26日 | ||||
| 应用手册 | Triple Rate SDI IP FPGA Resource Utilization on SDXILEVK/AES-EXP-SDI-G Ref Dsgn (Rev. A) | 2013年 4月 26日 | ||||
| 应用手册 | Application Note 1841 LMH1982 Evaluation Board User Guide (cn) | 最新英语版本 (Rev.A) | 2008年 5月 21日 | |||
| 应用手册 | A 3 Gbps SDI Connectivity Solution Supporting Uncompressed 1080p60 Video | 2008年 3月 18日 | ||||
| 应用手册 | Timing is Everything Çô The Broadcast Video Signal Path | 2007年 8月 2日 | ||||
| 设计指南 | Broadcast Video Owner's Manual | 2006年 11月 17日 | ||||
| 白皮书 | Improving Video Clock Generation in Modern Broadcast Video Systems | 2006年 7月 1日 |
设计和开发
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LMH1981MTEVAL — 用于 LMH1981 多格式视频同步分离器的评估板
The LMH1981 Evaluation Board can be used to evaluate the LMH1981 Multi-Format Sync Separator and as a reference for designing the PCB layout. Refer to the LMH1981 datasheet for more information on PCB layout considerations.
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| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| TSSOP (PW) | 14 | Ultra Librarian |
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