SD302EVK National Semiconductor, SD302EVK Datasheet - Page 6

• Manufacturer Part Number: SD302EVK
• Description: BOARD EVAL FOR LMH0302
• Manufacturer: National Semiconductor

Specifications of SD302EVK

• Design Resources: SD302EVK Schematic
• Main Purpose: Video, Cable Driver
• Utilized Ic / Part: LMH0302
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -

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Device Operation
INPUT INTERFACING
The LMH0302 accepts either differential or single-ended in-
put. The inputs are self-biased, allowing for simple AC or DC
coupling. DC-coupled inputs must be kept within the specified
common-mode range.
OUTPUT INTERFACING
The LMH0302 uses current mode outputs. Single-ended out-
put levels are 800 mV
with an R
between the R
should be used for R
The R
the R
REF
REF
pin. In addition, the copper in the plane layers below
REF
resistor should be placed as close as possible to
resistor of 750Ω. The R
REF
pin and V
REF
P-P
is 750Ω.
into 75Ω AC-coupled coaxial cable
CC
. The only resistor value that
REF
resistor is connected
6
the R
capacitance.
OUTPUT SLEW RATE CONTROL
The LMH0302 output rise and fall times are selectable for ei-
ther SMPTE 259M or SMPTE 424M / 292M compliance via
the SD/HD pin. For slower rise and fall times, or SMPTE 259M
compliance, SD/HD is set high. For faster rise and fall times,
or SMPTE 424M and SMPTE 292M compliance, SD/HD is
set low.
OUTPUT ENABLE
The SDO/SDO output driver can be enabled or disabled with
the ENABLE pin. When set low, the output driver is powered
off. ENABLE has an internal pullup.
REF
network should be removed to minimize parasitic