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LMH0394SQ/NOPB
3G HD/SD SDI Low Power Extended Reach Adaptive Cable Equalizer
Equalizer
Filter
MUTEREF
DC
Restoration/
Level Control
SDI
SDI SDO
SDO
BYPASS
Output
Driver
Carrier
Detect
SPI_EN
SPI Control
Control
LMH0394 3G HD/SD SDI Low Power Extended Reach Adaptive Features 3 DescriptionThe LMH0394 ST 424, ST 292, ST 344, ST 259, and DVB-ASI Extended ReachCompliant(1)
designedto equalize• Equalized Cable Lengths (Belden 1694A): 200 any mediaMetersat 2.97 Gbps, 220 Metersat 1.485 Gbps, characteristics). Theand 400 Metersat 270 Mbps rangeof data rates
supports ST 424,• Ultra Low Power Consumption: 115 mW (Normal
ASI standards(1).Operation) Power-Save Mode With Auto Sleep Control The LMH0394 provides extended cable reach with
improved immunityto crosstalk and ultra low power(17-mW Typical Power Consumptionin Power-
consumption. The equalizer includes active sensingSave Mode) circuitry that ensures robust performance and• Designedfor Crosstalk Immunity enhanced immunityto variationsin the input signal• Output De-Emphasisto Compensatefor FR4 launch amplitude. The output driver offersBoard Trace Losses programmable de-emphasis for up to 40”of FR4
trace losses. The LMH0394 includes power• Digital and Analog Programmable MUTEREF
managementto further reduce power consumptionThreshold when no input signalis present.• Optional SPI Register Access
The LMH0394 supports two modesof operation.In• Input Data Rates: 125 Mbpsto 2.97 Gbps pin mode, the LMH0394 operates with control pinsto• Internally Terminated 100-Ω LVDS Outputs With setits operating state, andis footprint compatible withProgrammable Output Common-Mode Voltage the LMH0384, LMH0344, and legacy SDI equalizers.and Swing In SPI mode, an optional SPI serial interface can be
used to access and configure multiple LMH0394• Programmable Launch Amplitude Optimization
devicesina daisy-chain configuration. This allows• Cable Length Indicator usersto program the output common-mode voltage• Single 2.5-V Supply Operation and swing, output de-emphasis level, input launch 16-pin WQFN Package amplitude, and power management settings. Users
may also accessa cable length indicator andall pin• Industrial Temperature Range: −40°Cto +85°C mode features.• Footprint Compatible with the LMH0384 and also
the LMH0344, LMH0044, and LMH0074in Pin
Device Information(1)Mode
2 Applications(1) Forall available packages, see the orderable addendumat• ST 424, ST 292, ST 344, and ST 259 Serial the endofthe data sheet.Digital Interfaces(1)
Functional Block Diagram• Broadcast Video Routers, Switchers, and
