M21518-13 Datasheet, PDF (1/24 Pages) M/A-COM Technology Solutions, Inc. – 3G/HD/SD-SDI Multi-rate Video Cable Driver

M21518-13
3G/HD/SD-SDI Multi-rate Video Cable Driver
Rev V5
The M21518 is a very low power cable driver for SMPTE compliant digital video applications. The M21518 can drive a
pair of 75  coaxial cables or 50  equivalent loads at SDI data rates from 270 Mbps to 2.97 Gbps. The device is
capable of outputting SDI signals with typical jitter values of 12 ps peak–to–peak, when operating at 2.97 Gbps.
The M21518 cable driver includes integrated input and output termination resistors, input equalization for up to 36" of
FR4 trace, two connectors, and exceptional Output Return Loss (ORL) making it ideal for high speed, 3G-SDI, designs.
The device features integrated supply regulators, allowing it to be powered from 1.8 V, 2.5 V, or 3.3 V supply voltages.
When operating at 1.8 V, the cable driver consumes only 52 mW at 2.97 Gbps. Furthermore, the power rails for the input
and output circuitry are electrically isolated on-chip and as such may be connected to different voltage rails on the board.
This feature enables the device to be DC coupled to any upstream device in the 1.2 V to 3.3 V range.
The cable driver also provides cable detect and Loss of Signal (LOS) functionality. The device may be configured to
automatically power down at cable disconnect or loss of input signal.
The M21518 is available in a green and RoHS-compliant 24-pin QFN package.
Applications
• 3G/HD/SD Video Switchers
• 3G/HD/SD Video Routers
• 3G/HD/SD Distribution Amplifiers
• DVB-ASI Equipment
• SMPTE 259C/D, 292, 424M, DVB ASI 270 Mbps
Features
• Two non-inverting outputs
• Typical output jitter of 12 ps peak–to–peak at 2.97 Gbps
• Exceptional Output Return Loss with no matching network
• Very low power design; 52 mW @1.8 V
• Selectable slew rate for SD and 3G/HD operation
• Input equalization for up to 36" of FR4 + 2 connectors
• Integrated, selectable 75  or 50  output termination
• Integrated 50  input termination
• On-chip regulators for operation from 1.8 V to 3.3 V DC supply
• Universal DC coupling at the input from 1.2 V to 3.3 V
• Cable detect on both outputs with automatic power down and power up upon
cable disconnect and re-connect
• Loss of input signal detection output
• Output mute and power down
• Industrial operating temperature range: -40 °C to 85 °C
• 4 kV HBM and 500 V CDM ESD rating
• 4 mm x 4 mm 24-pin QFN package
• Green and RoHS compliant
M21518 Block Diagram
SDIP
SDIN
LOS
IE
CABLE
DET
75Ω/50Ω
SDO0A
75Ω/50Ω
SDO0B
1
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