LMH1228
- Supports ST-2082-1 (12G), ST-2081-1 (6G), ST-424 (3G), ST-292 (HD), and ST-259 (SD)
- Compatible with DVB-ASI and AES10 (MADI)
- Integrated reclocker locks to SMPTE rates of 11.88 Gbps, 5.94 Gbps, 2.97 Gbps, 1.485 Gbps or divide-by-1.001 sub-rates and 270 Mbps
- Integrated Eye Opening Monitor (EOM)
- Dual differential output cable drivers
- On-chip 75-Ω termination and return loss compensation network
- Adaptive PCB input equalizer
- Reclocked 100-Ω loop-back output
- Automatic slew rate control on 75-Ω outputs
- Automatic pre-emphasis and output amplitude on 75-Ω outputs
- Programmable de-emphasis and output amplitude on 100-Ω output
- Polarity inversion on 75-Ω and 100-Ω outputs
- Automatic power save in absence of input signal
- Power Consumption: 25 mW (Typical)
- Power-Down Control Through ENABLE Pin
- Single 2.5-V Supply
- Power consumption: 305 mW (typical)
- Programmable through pins, SPI, or SMBus interface
- –40°C to +85°C operating temperature range
- 5-mm × 5-mm, 32-pin WQFN package
LMH1228 device is a 12G UHD-SDI low power dual output cable driver with integrated reclocker. It supports SMPTE video rates up to 11.88 Gbps, enabling UHD video for 4K/8K applications. With a wide range clock-and-data recovery (CDR) circuit, the on-chip reclocker automatically detects and locks to all SMPTE video rates up to 11.88 Gbps. The additional reclocked 100-Ω driver output on the host-side can be used for monitoring or signal distribution purposes.
The on-chip reclocker attenuates high-frequency jitter and fully regenerates the data using a clean, low-jitter clock. The reclocker has a built-in loop filter and does not require any input reference clock. The LMH1228 also has an internal eye opening monitor and a programmable pin for CDR lock indication, input signal detect, or hardware interrupts to support system diagnostics and board bring-up.
The LMH1228 is powered from a single 2.5-V supply. It is offered in a small footprint 5 mm × 5 mm 32-pin WQFN package. The LMH1228 is pin compatible with the LMH1208 (12G Dual Cable Driver).
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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 | LMH1228 12G UHD-SDI Dual Output Cable Driver With Integrated Reclocker datasheet (Rev. D) | PDF | HTML | 2020/5/12 | ||
| 應用說明 | LMH121x 12G SDI PCB Layout Guidelines | 2020/2/19 | ||||
| 應用說明 | Simplifying 4K SDI Video Design with a Bidrectional I/O | 2017/10/31 | ||||
| 技術文章 | Three reasons why a bidirectional I/O will simplify your next 4K video design | PDF | HTML | 2017/9/6 |
設計與開發
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LMH1297EVM — LMH1297 12-G 雙向 I/O 評估模組
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN (RTV) | 32 | 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。