DS280BR820
- Octal-Channel Multi-Protocol Linear Equalizer Supporting up to 28 Gbps Interfaces
- Low Power Consumption: 93 mW / Channel (Typical)
- No Heat Sink Required
- Linear Equalization for Seamless Support of Link Training, Auto-Negotiation, and FEC Pass-Through
- Extends Channel Reach by 17 dB+ Beyond Normal ASIC-to-ASIC Capability
- Ultra-Low Latency: 100 ps (Typical)
- Low Additive Random Jitter
- Small 8-mm x 13-mm BGA Package with Integrated RX AC Coupling Capacitors for Easy Flow-Through Routing
- Unique Pinout Allows Routing High-Speed Signals Underneath the Package
- Pin-Compatible Retimer Available
- Single 2.5-V ±5% Power Supply
- –40°C to +85°C Operating Temperature Range
The DS280BR820 is an extremely low-power, high-performance eight-channel linear equalizer supporting multi-rate, multi-protocol interfaces up to 28 Gbps. It is used to extend the reach and improve the robustness of high-speed serial links for backplane, front-port, and chip-to-chip applications.
The linear nature of the DS280BR820’s equalization preserves the transmit signal characteristics, thereby allowing the host and link partner ASICs to freely negotiate transmit equalizer coefficients (100G-CR4/KR4). This transparency to the link training protocol facilitates system-level interoperability with minimal effect on the latency. Each channel operates independently, which allows the DS280BR820 to support individual lane Forward Error Correction (FEC) pass-through.
The DS280BR820’s small package dimensions, optimized high-speed signal escape, and the pin-compatible Retimer portfolio make the DS280BR820 ideal for high-density backplane applications. Simplified equalization control, low power consumption, and ultra-low additive jitter make it suitable for front-port interfaces such as 100G-SR4/LR4/CR4. The small 8-mm x 13-mm footprint easily fits behind numerous standard front-port connectors like QSFP, SFP, CFP2, CFP4, and CDFP without the need for a heat sink.
Integrated AC coupling capacitors (RX side) eliminate the need for external capacitors on the PCB. The DS280BR820 has a single power supply and minimal need for external components. These features reduce PCB routing complexity and bill of materials (BOM) cost.
A pin-compatible Retimer device is available for longer reach applications.
The DS280BR820 can be configured either through the SMBus or through an external EEPROM. Up to 16 devices can share a single EEPROM.
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技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | DS280BR820 Low Power 28 Gbps 8 Channel Linear Repeater datasheet (Rev. B) | PDF | HTML | 2019年 10月 3日 |
| Application note | Implementing Pin Compatible Ethernet Redrivers and Retimers | PDF | HTML | 2024年 10月 28日 | |
| Application note | Optimal Implementation of 25G-28G Ethernet Retimers versus Redrivers (Rev. B) | PDF | HTML | 2023年 5月 1日 | |
| More literature | Advanced Signal Conditioning Made Easy and Efficient | 2017年 1月 12日 | ||
| Application note | Understanding EEPROM Programming for 25G and 28G Repeaters and Retimers | 2016年 1月 13日 |
設計與開發
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DS280BR820EVM — DS280BR820 28 Gbps 8 通道線性中繼器評估模組
DS280BR820EVM 可讓您輕鬆評估 DS280BR820 28 Gbps 8 通道線性中繼器。若要使用此 EVM，請透過標準香蕉連接器提供電源 (2.5V 或 3.3V)，並透過 Huber+Suhner 1x8 MXP 連接器提供高速通訊。不包括 Huber+Suhner 電纜組譯器。
透過板上 USB2ANY 連線和 EVM 軟體，使用者可以評估裝置功能，例如均衡設定、寬頻帶幅度增益設定、驅動程式設定、EEPROM 檔案產生，以及其他暫存器功能。
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| NFBGA (ZBL) | 135 | Ultra Librarian |
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