LMH1218
- Supports ST-2082 (Proposed), ST-2081 (Proposed), SMPTE 424M, 344M, 292M, 259M, DVB-ASI, SFF-8431 (SFP+) and 10GbE Ethernet for SMPTE 2022-5/6
- Locks to Rates 11.88 Gbps, 5.94 Gbps, 2.97 Gbps, 1.485 Gbps, or Divided by 1.001 Sub-Rates, DVB-ASI (270 Mbps) and 10GbE (10.3125 Gbps)
- Reference-Free Operation With Fast Lock Time Covering All Supported or Selected Data Rates
- 75-Ω and 100-Ω Transmitter Outputs
- Integrated 2:1 Mux Input, 1:2 Demux/Fanout Outputs
- Automatic Slew Rate Based on Input Rate Detect
- On-Chip Eye Monitor
- Low 300-mW Power Consumption With Automatic Power Down on Loss of Input Signal
- Programmable Through SPI or SMBus Interface
- Single 2.5-V Supply Operation
- Small 4-mm × 4-mm 24-Pin WQFN Package
- –40°C to +85°C Operating Temperature Range
The LMH1218 device is a low-power cable driver with integrated reclocker to drive serial video data compatible to SMPTE-SDI, SMPTE 2022-5/6, 10GbE Ethernet, and DVB-ASI standards. The LMH1218 supports up to 11.88 Gbps to enable Ultra High Definition Video for 4K/8K applications. With 75-Ω and 50-Ω transmitter outputs, the LMH1218 enables multiple media options such as coax, fiber, and FR-4 PCB.
The integrated 2-to-1 MUX on the input of the LMH1218 enables selection between two video sources, while the programmable equalizer compensates for the printed-circuit board loss to extend signal reach. With a wide range clock-and-data recovery (CDR) circuit, the on-chip reclocker automatically detects and locks to serial data from 270 Mbps to 11.88 Gbps without the need for an external reference clock and loop filter component, thereby simplifying board design and lowering system cost. The reclocked serial data can be routed to either the 75-Ω or 50-Ω transmitter output, or both simultaneously (1-to-2 fanout mode). The output voltage swing is compatible to SFF-8431 (SFP+), ST-2082/1 (Proposed), SMPTE 424M, 344M, 292M, and 259M standards.
A non-disruptive eye monitor allows for real-time measurement of serial data to simplify system start-up or field tuning. The LMH1218 can be programmed using SPI or SMBus Interface.
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技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LMH1218 Low Power Ultra HD Cable Driver With Integrated Reclocker datasheet (Rev. E) | PDF | HTML | 2018/6/12 | ||
| 應用說明 | LMH121x 12G SDI PCB Layout Guidelines | 2020/2/19 | ||||
| 應用說明 | LMH12xx MADI Compatibility Application Note | PDF | HTML | 2018/8/30 | |||
| 使用指南 | LMH1218 Programming Guide (Rev. B) | 2018/6/12 | ||||
| 技術文章 | Three reasons why a bidirectional I/O will simplify your next 4K video design | PDF | HTML | 2017/9/6 | |||
| 技術文章 | Three things to consider when upgrading to 4K Ultra HD 12G-SDI interfaces | PDF | HTML | 2016/4/13 | |||
| 技術文章 | SigCon Architect: The keys to your high-speed design | PDF | HTML | 2015/10/27 | |||
| 應用說明 | SDI Video Bit Rate Calculation | 2015/4/10 |
設計與開發
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LMH1218EVM — LMH1218 評估模組
LMH1218EVM 評估模組提供完整的高頻寬平台，可評估德州儀器具有整合式時脈重整器之 LMH1218 UHD 纜線驅動器的 SDI/UHD 與 10 GbE 訊號調整功能。LMH1218EVM 可用於標準合規測試、性能評估和初始系統原型設計。用於 LMH1218EVM 的 SMA 和 BNC 邊緣啟動連接器，可透過市售分接纜線、轉接器及電路板 (未隨附) 介接多種系統連接器類型。這種彈性的連線方式可在 TI 具有時脈重整器的 12G SDI 纜線驅動器，以及第三方 ASIC/FPGA 主機板之間，實現整合式系統層級測試。可使用圖形使用者介面管理 LMH1218 裝置暫存器。
此 EVM (...)
SIGCONARCHITECT-SDI-PROFILES — SigCon Architect SDI Profiles
SIGCONARCHITECT-WRTE — SigCon Architect With RTE v2.0.0.8
TIDA-00428 — 具有時鐘重整功能的 12 Gbps SDI 和 IP 視頻中繼器
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN (RTW) | 24 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。