The LMH0307 3 Gbps HD/SD SDI Dual Output Cable Driver with Cable Detect is designed for
use in SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE 259M serial digital video applications. The
LMH0307 implements two complementary output drivers and drives 75Ω transmission lines (Belden
1694A, Belden 8281, or equivalent) at data rates up to 2.97 Gbps.
The LMH0307 includes intelligent sensing capabilities to improve system diagnostics. The
cable detect feature senses near-end termination to determine if a cable is correctly attached to
the output BNC. Input loss of signal (LOS) detects the presence of a valid signal at the input of
the cable driver. These sensing features may be used to alert the user of a system fault and
activate a deep power save mode, reducing the cable driver's power consumption to 4 mW. These
features are accessible via an SMBus interface.
The LMH0307 provides two selectable slew rates for SMPTE 259M and SMPTE 424M / 292M
compliance. The output amplitude is adjustable ±10% in 5 mV steps via the SMBus.
The LMH0307 is powered from a single 3.3V supply. Power consumption is typically 230 mW
in SD mode and 275 mW in HD mode. The LMH0307 is available in two space-saving packages: a 4 x 4 mm
16-pin WQFN and even more space-efficient 3 x 3 mm 25-ball CS-BGA package.
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