Datasheet

10 k:
SDI
SDI
V
CC
10 k:
5 k:
80:
V
CC
10 k:
LMH0001
SNLS276C –AUGUST 2007–REVISED APRIL 2013 www.ti.com
DEVICE OPERATION
INPUT INTERFACING
The LMH0001 accepts either differential or single-ended input. The inputs are self-biased, allowing for simple AC
or DC coupling. DC-coupled inputs must be kept within the specified common-mode range. SDI and SDI are self-
biased at approximately 2.1V with V
CC
= 3.3V. Figure 2 shows the differential input stage for SDI and SDI.
Figure 2. Differential Input Stage for SDI and SDI.
OUTPUT INTERFACING
The LMH0001 uses current mode outputs. Single-ended output levels are 800 mV
P-P
into 75Ω AC-coupled
coaxial cable (with R
REF
= 750Ω). Output level is controlled by the value of the R
REF
resistor connected between
the R
REF
pin and V
CC
.
The R
REF
resistor should be placed as close as possible to the R
REF
pin. In addition, the copper in the plane
layers below the R
REF
network should be removed to minimize parasitic capacitance.
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