Texas Instruments SD387EVK Evaluation Board SD387EVK/NOPB SD387EVK/NOPB Datenbogen
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Produktcode
SD387EVK/NOPB
FIGURE 1. SD387 Evaluation Board
Inputs and Outputs: BNC_IO Input/Output, SDI Input, and SDO Output
The bidirectional I/O (J1) is a 75
Ω BNC connector. When the LMH0387 is configured as an input, the input signal
on the BNC_IO pin should conform to the SMPTE 424M, SMPTE 292M, or SMPTE 259M standards. When the
LMH0387 is configured as an output, the BNC_IO pin will drive SMPTE SDI signal levels (800 mV
LMH0387 is configured as an output, the BNC_IO pin will drive SMPTE SDI signal levels (800 mV
P-P
into 75
Ω).
The SDI input connectors (J2 and J3) are 50
Ω SMA connectors. This cable driver input includes a 100Ω differential
termination resistor (R5) at the LMH0387 device and is optimized for 100
Ω differential input.
The SDO output connectors (J4 and J5) are 50
Ω SMA connectors. When using only one side of this equalizer
output pair, the other side should be terminated with a 50
Ω SMA termination. For example, when only using the
SDO output, SDO
¯¯¯¯ should be terminated with a 50
Ω SMA termination.
SD387EVK User Guide
2 of 23
Rev 1.1
© 2010 National Semiconductor Corp.