SD001EVK National Semiconductor, SD001EVK Datasheet - Page 6

• Manufacturer Part Number: SD001EVK
• Description: BOARD EVALUATION CLC001
• Manufacturer: National Semiconductor

Specifications of SD001EVK

• Design Resources: CLC001 Eval Board Schematic
• Main Purpose: Interface, Digital Cable Driver
• Utilized Ic / Part: CLC001
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -

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Device Operation
INPUT INTERFACING
Numerous input configurations exist for applying PECL,
LVPECL, and LVDS signals to the input of the CLC001.
Inputs may be single-ended or differential, AC or DC
coupled.
The V
inputs. Leave this pin as a no connect when no bias is
needed. Note that DC-coupled inputs such as direct LVDS
and LVPECL connections are self-biasing and do not require
use of the V
depends on R
remain constant, and the bias voltage is determined by the
value of resistance, R
Figure 3 and Figure 4 show how R
common V
respectively. Some common input configurations are shown
in Figure 5 through Figure 9.
BB
FIGURE 3. R
pin may be used to provide a DC bias voltage to the
BB
BB
values with R
REF
pin. I
. For a given R
BB
BB
, the current produced by the V
BB
vs. V
, between the V
REF
BB
held at 1.91 kΩ and 1.5 kΩ,
for R
REF
BB
REF
corresponds to some
, the I
BB
= 1.91 kΩ
pin and ground.
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BB
current will
BB
pin,
6
FIGURE 4. R
BB
vs. V
BB
for R
REF
= 1.5 kΩ
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