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Description

The LMH0303 3 Gbps HD/SD SDI Cable Driver with Cable Detect is designed for use in SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE 259M serial digital video applications. The LMH0303 drives 75Ω transmission lines (Belden 1694A, Belden 8281, or equivalent) at data rates up to 2.97 Gbps. The LMH0303 includes intelligent sensing capabilities to improve system diagnostics. The cable detect feature senses near-end termination to determine if a cable is correctly attached to the output BNC.

Input loss of signal (LOS) detects the presence of a valid signal at the input of the cable driver. These sensing features may be used to alert the user of a system fault and activate a deep power save mode, reducing the cable driver's power consumption to 4 mW. These features are accessible via an SMBus interface. The LMH0303 provides two selectable slew rates for SMPTE 259M and SMPTE 424M / 292M compliance. The output amplitude is adjustable ±10% in 5 mV steps via the SMBus. 

Features

• SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE 259M Compliant
• Data Rates to 2.97 Gbps
• Supports DVB-ASI at 270 Mbps
• Cable Detect on Output
• Loss of Signal Detect at Input
• Output Driver Power Down Control
• Typical Power Consumption: 130 mW in SD Mode and 155 mW in HD Mode
• Power Save Mode Typical Power Consumption: 4 mW
• Single 3.3V Supply Operation
• Differential Input
• 75Ω Differential Output
• Selectable Slew Rate
• Industrial Temperature Range: −40°C to +85°C
• Footprint Compatible With the LMH0302

Applications

• SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE 259M Serial Digital Interfaces
• Digital Video Routers and Switches
• Distribution Amplifiers