XR2212 Exar Corporation, XR2212 Datasheet - Page 14
XR2212
Manufacturer Part Number
XR2212
Description
Precision Phase-Locked Loop
Manufacturer
Exar Corporation
Datasheet
1.XR2212.pdf
(20 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
XR2212CP
Manufacturer:
ADI
Quantity:
8 841
INPUT SENSITIVITY
The input to the XR-2212 may sometimes be too sensitive
to noise conditions on the input line. Figure 13 illustrates
a method of de-sensitizing the XR-2212 from such noisy
line conditions by the use of a resistor, Rx, connected from
pin 2 to ground. The value of Rx is chosen by the equation
and the desired minimum signal threshold level.
V
to be detected (equivalent to adjusting V threshold).
XR-2212
IN
minimum (peak) input voltage must exceed this value
Rev. 2.01
Input
Rx
Figure 13. Desensitizing Input Stage
V
REF
Î Î
Î Î
Î Î
11
2
Va
20K
14
V
R
IN
X
V
minimum ( peak )
20, 000 V
Vcc
Vb
2.8 V offset
20K
To Phase
Detector
REF
V
V
REF
1
V
a
–V
(20, 000
b
20, 000
R
X
)
or