LMH0397
- User-configurable adaptive cable equalizer or cable driver with integrated reclocker
- Supports ST-424 (3G), ST-292 (HD), and ST-259 (SD)
- Compatible with DVB-ASI and AES10 (MADI)
- Integrated reclocker locks to SMPTE rates of 2.97 Gbps, 1.485 Gbps, or divide-by-1.001 subrates and 270 Mbps
- On-Chip 75-Ω termination and return loss compensation network
- EQ (equalizer) mode:
- Adaptive cable equalizer with integrated reclocker
- 100-Ω Output driver with de-emphasis
- Reclocked 75-Ω loop-through output
- EQ mode cable reach
(Belden 1694A, SDI_OUT Disabled):- 200 m at 2.97 Gbps
- 300 m at 1.485 Gbps
- 600 m at 270 Mbps
- CD (cable driver) mode:
- Dual differential output cable drivers with integrated reclocker
- Adaptive PCB input equalizer
- Reclocked 100-Ω loopback output
- Automatic pre-emphasis and slew rate control on 75-Ω outputs
- Polarity inversion on 75-Ω and 100-Ω outputs
- Automatic power save in absence of input signal
- Power dissipation: 25 mW (typical)
- Power-down control through ENABLE pin
- Single 2.5-V supply
- EQ mode power dissipation: 275 mW (typical)
- CD mode power dissipation: 290 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
- Pin compatible with the LMH1297 for easy upgrade to 12G-SDI
The LMH0397 is a 3G-SDI 75-Ω bidirectional I/O with integrated reclocker. This device can be configured either in input mode as an adaptive cable equalizer or in output mode as a dual cable driver, allowing system designers the flexibility to use a single BNC either as an input or output port to simplify HD-SDI video hardware designs. The integrated reclocker locks to all supported SMPTE data rates up to 2.97 Gbps in both modes. The bidirectional I/O has an on-chip 75-Ω termination and return loss compensation network that meets the stringent SMPTE return loss requirements.
An additional 75-Ω driver output allows the LMH0397 to support a variety of system functions. In EQ (Equalizer) Mode, this second 75-Ω driver can be used as a loop-through output. In Cable Driver (CD) Mode, this 75-Ω driver can be used as a second fan-out cable driver. The host-side 100-Ω driver can also be used as a loopback output in CD Mode for monitoring 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 LMH0397 also has an internal eye opening monitor and a programmable pin for CDR lock indication, input carrier detect, or hardware interrupts to support system diagnostics and board bring-up.
The LMH0397 is powered from a single 2.5-V supply. The device is offered in a small 5-mm × 5-mm, 32-pin WQFN package. The LMH0397 is also pin-compatible with the LMH1297.
更多資訊
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技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LMH0397 3G-SDI Bidirectional I/O With Integrated Reclocker datasheet (Rev. C) | PDF | HTML | 2020年 5月 12日 |
| Application note | LMH12xx MADI Compatibility Application Note | PDF | HTML | 2018年 8月 30日 | |
| Application note | Simplifying 4K SDI Video Design with a Bidrectional I/O | 2017年 10月 31日 | ||
| Technical article | Three reasons why a bidirectional I/O will simplify your next 4K video design | PDF | HTML | 2017年 9月 6日 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
LMH1297EVM — LMH1297 12G 雙向 I/O 評估模組
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
TINA-TI — 基於 SPICE 的類比模擬程式
| 封裝 | 引腳 | 下載 |
|---|---|---|
| WQFN (RTV) | 32 | 檢視選項 |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 資格摘要
- 進行中可靠性監測
- 晶圓廠位置
- 組裝地點
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。