Device operation, Clc001 – Rainbow Electronics CLC001 User Manual

Page 5

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

pin may be used to provide a DC bias voltage to

the 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

pin. I

, the current produced

by the V

pin, depends on R

REF

. For a given R

REF

, the

current will remain constant, and the bias voltage is

determined by the value of resistance, R

, between the

pin and ground.

Figure 3 and Figure 4 show how R

corresponds to some common V

values with R

REF

held

at 1.91 k

Ω

and 1.5 k

Ω

, respectively. Some common input

configurations are shown in

Figure 5 through Figure 9.

DS101329-11

FIGURE 3. R

vs. V

for R

REF

= 1.91 k

Ω

DS101329-12

FIGURE 4. R

vs. V

for R

REF

= 1.5 k

Ω

CLC001