GS2984
Overview
The GS2984 supports the industry's longest cable lengths (140m) at the lowest output jitter (0.25UI). The GS2984 is a high-speed BiCMOS integrated circuit designed to equalize and restore signals received over 75Ω coaxial cable.
The device is designed to support SMPTE 424M, SMPTE292M and SMPTE 259M, and is optimized for performance at 270Mb/s, 1.485Gb/s and 2.97Gb/s.
The GS2984 features DC restoration to compensate for the DC content of SMPTE pathological test patterns.
The Carrier Detect output pin (CD) indicates whether a valid input signal has been detected. It can be connected directly to the MUTE pin to mute the output on loss of carrier. A voltage programmable threshold, which can be changed via the SQ_ADJ pin, forces CD high when the input signal amplitude falls below the threshold. This allows the GS2984 to distinguish between low-amplitude SDI signals and noise at the input of the device.
The equalizing and DC restore stages are disengaged when the BYPASS pin is HIGH. No equalization occurs in Bypass mode.
The GS2984 includes a gain selection pin (GAIN_SEL) which, when tied HIGH, compensates for 6dB flat attenuation.
The differential outputs can be DC-coupled to Gennum 3.3V cable drivers and reclockers and to industry-standard 3.3V and 2.5V CML logic using the CMSET pin.
The GS2984 is footprint and drop-in compatible with existing GS2974 designs, with no additional application changes required.
The device is available in a 16-pin, 4mm x 4mm QFN package.
Power consumption of the GS2984 is typically 195mW.
The GS2984 is Pb-free, and the encapsulation compound does not contain halogenated flame retardant.
This component and all homogeneous subcomponents are RoHS compliant.
Features/Highlights
- SMPTE 424M, SMPTE 292M and SMPTE 259M compliant
- Automatic cable equalization
- 140m cable length at 3Gb/s, 200m at HD, 400m at SD
- 140m at 2.97Gb/s
- 200m at 1.485Gb/s
- 400m at 270Mb/s
- Drop-in compatible with the GS2974
Key Applications
- Audio De-embedders
- Audio Embedders
- Camera
- Camera Control Units
- Distribution Amplifiers
- Encoders/Decoders
- Format Detectors
- Master Control Switchers
- Monitors
- Multiviewers
- Production Switchers
- Routers
- SMPTE 424M, SMPTE 292M and SMPTE 259M coaxial cable serial digital interfaces
- Test and Measurement Equipment
- Up/Down/Cross Converters
- Video Capture Cards
- Video Servers
- Video Tape Recorders
Ordering Information
Part No | Package |
GS2984-INE3 | 16 pin QFN |
GS2984-INTE3 | 16 pin QFN Tape & Reel (250pcs) |
GS2984-INTE3Z | 16 pin QFN Tape & Reel (2500pcs) |
| Document | Type | Size | ||
|---|---|---|---|---|
| Broadcast Video Product Guide | Brochure | 1.4 MB | ||
 | GS2984-INE3 Certificate of Compliance | Certificate | 154 kB | |
| GS2984 Datasheet | Datasheet | 911 kB | |
 | A Guide For Designing With Gennum's 3G-SDI Equalizers | Design Guide | 701 kB | |
| GS2984 IBIS Model | IBIS Models | 1.1 MB | |
| EB-GS2984 | PCB Drawing | 139 kB | |
| GS2984 Product Brief | Product Brief | 230 kB | ||
| GS2984 Material Composition Sheet | RoHS Document | 16 kB | |
| EB-GS2984 User Guide | User Guide | 543 kB |
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