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

Ω and 1.5 kΩ,

respectively. Some common input configurations are shown

in Figure 5 through Figure 9.

10132911

FIGURE 3. R

Ω

10132912

FIGURE 4. R

Ω

www.national.com

6