Linear Integrated Power Cabling

Linear Integrated Power Cabling leverages linear-drive pluggable optics (LPO) to reduce power consumption, latency, and thermal density in high-speed data center interconnects.Overview of Linear Drive Pluggable (LPO) TechnologyLinear Drive Pluggable (LPO) is a DSP-less optical transceiver architecture designed for high-speed Ethernet networks, including 800G and future 1.6T systems . Unlike traditional DSP-based modules, LPO removes the retimer and relies on the host ASIC's native SerDes equalization to maintain signal integrity across both electrical and optical paths . This approach shifts signal correction from the optical module to the host PCB, connectors, and ASIC SerDes, making PCB material quality, insertion loss, and analog linearity critical for deployment .Advantages of LPO-Based CablingReduced Power Consumption: LPO modules typically operate at 7–9W per transceiver, compared to 14–18W for DSP-based modules, significantly lowering energy usage in hyperscale AI fabrics .Lower Latency: By eliminating intermediate DSP components, LPO simplifies the transmission path, reducing latency and improving real-time data transfer .Thermal Efficiency: Lower power consumption reduces heat generation, enabling higher-density switch and compute fabric deployments without exceeding thermal limits .Optimized Short-Reach Connectivity: LPO modules, especially when paired with Marvell's 200G per lane TIA and laser driver chipset, extend reach and bandwidth beyond the limitations of passive copper DACs, making them ideal for short-reach compute fabric interconnects .Deployment ConsiderationsSignal Integrity: High-speed LPO links require careful PCB design and high-quality connectors to maintain linearity and minimize insertion loss .Hybrid Approaches: At higher data rates (e.g., 224 Gbps), hybrid designs incorporating Automatic Gain Control (AGC) and Clock Data Recovery (CDR) chips may be necessary to address nonlinearity and maintain signal fidelity .Compatibility: LPO modules are designed to interface directly with optical components, but careful planning is required to ensure interoperability with existing data center infrastructure .ApplicationsLPO-based cabling is particularly suited for:Hyperscale AI networks where aggregate bandwidth exceeds traditional thermal envelopes .Short-reach compute fabrics connecting XPUs within and across racks .Data centers seeking energy-efficient, low-latency interconnects to support high-bandwidth workloads .SummaryLinear Integrated Power Cabling, through linear-drive pluggable optics, provides a power-efficient, low-latency, and thermally optimized solution for modern high-speed data center interconnects. By moving signal equalization to the host ASIC and eliminating DSPs, LPO enables longer reach, higher bandwidth, and improved performance compared to traditional copper or DSP-based optical modules, making it a key technology for next-generation AI and hyperscale compute fabrics .