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GS3281 Datasheet(PDF) 1 Page - Semtech Corporation |
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GS3281 Datasheet(HTML) 1 Page - Semtech Corporation |
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1 / 97 page  1 of 97 Semtech Proprietary & Confidential GS3281 Final Data Sheet Rev.7 PDS-061453 January 2019 GS3281 3G-SDI Re-timing Cable Driver www.semtech.com Key Features • Dual non-inverted 75Ω cable interface with on-chip termination • SMPTE ST 424, ST 292-1 and ST 259 compliant input/output • Multi-standard operation from 1Mb/s to 2.97Gb/s • In addition to standard SMPTE rates, the device also supports re-timing of DVB-ASI at 270Mb/s, and MADI at 125Mb/s. • Cable driver features: Wide swing control Pre-emphasis to compensate for significant insertion loss between device output and BNC Automatic/manual output slew rate control Manual or automatic re-timer bypass Manual or automatic Mute or disable on LOS • Trace equalizer features: Integrated 100Ω, differential input termination Automatic power down on loss of signal Adjustable carrier detect threshold DC-coupling from 1.2V to 2.5V CML logic Trace equalization to compensate for up to 60” FR4 at 2.97Gb/s Automatic input offset compensation • CDR features: Manual or automatic rate modes Wide Loop bandwidth control Re-timing at the following data rates: 125Mb/s, 270Mb/s, 1.485Gb/s, and 2.97Gb/s. This includes the f/1.001 rates. Additional Features • Single 1.8V power supply for analog and digital core • 2.5V or 3.3V for cable driver output supply • GSPI serial control and monitoring interface • Four configurable GPIO pins for control or status monitoring • Wide operating temperature range: -40ºC to +85ºC • Small 6mm x 4mm 40-pin QFN • Pb-free/Halogen-free/RoHS and WEEE compliant package • Pin compatible with the GS12181, GS12182, GS12081, and GS12281 Applications SMPTE ST 424, SMPTE ST 292, SMPTE ST 259 interfaces requiring cable driving functionality. Typical applications: Cameras, Switchers, Distribution Amplifiers and Routers. Description The GS3281 is a low-power, multi-rate, re-timing cable driver supporting rates up to 3G-SDI. It is designed to receive 100Ω differential input signals, automatically recover the embedded clock from the digital video signal and re-time the incoming data, and transmit the re-timed signal over 75Ω coaxial cables. The 100Ω trace input supports up to 17dB of insertion loss. The integrated eye monitor provides non-disruptive mission mode analysis of the post equalized input signal. The 256x128 resolution scan matrix allows accurate signal analysis to speed up prototyping and enable field analysis. Built in macros enable customizable cross section analysis and quick horizontal and vertical eye opening measurements. With high phase consistency between scans and configurable space and time thresholds, algorithms can be deployed in the field to analyze long term signal quality variation (Bathtub Plot) to reduce costly system installation debug time for intermittent errors. The two cable drivers have highly configurable pre-emphasis and swing controls to compensate for long trace and connector losses. Additionally, automatic and user selectable output slew rate control is provided for each cable driver output. The GS3281 is pin compatible with the GS12181 and GS12281 single input, and the GS12182 dual input 12G UHD-SDI Multi-rate Re-timing Cable Drivers, as well as the GS12081 12G UHD-SDI Multi-rate Cable Driver. Note: For the GS3281 to be pin compatible with the GS12182, careful design considerations are required. Contact for your local Semtech FAE for details. |
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