LMH0044_09 Datasheet, PDF (6/8 Pages) National Semiconductor (TI) – SMPTE 292M / 259M Adaptive Cable Equalizer

Application Information
PCB LAYOUT RECOMMENDATIONS
Please refer to the following Application Note on National's
website: AN-1372, “LMH0034 PCB Layout Techniques.”
The PCB layout techniques in the application note apply to
the LMH0044 as well.
REPLACING THE GENNUM GS1574A
The LMH0044 is footprint compatible with the Gennum
GS1574A.
SUPPLY CURRENT VS. CABLE LENGTH
The supply current (I_CC) depends on the amount of cable be-
ing equalized. The current is highest for short cable and
decreases as the cable length is increased. Figure 1 shows
supply current vs. Belden 1694A cable length for 1.485 Gbps
data and Figure 2 shows supply current vs. Belden 1694A
cable length for 270 Mbps data.
20177015
FIGURE 2. Supply Current vs. Belden 1694A Cable
Length, 270 Mbps
20177013
FIGURE 1. Supply Current vs. Belden 1694A Cable
Length, 1.485 Gbps
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