PEF22827EL-V11 Lantiq, PEF22827EL-V11 Datasheet - Page 133

• Manufacturer Part Number: PEF22827EL-V11
• Manufacturer: Lantiq

Specifications of PEF22827EL-V11

• Lead Free Status / RoHS Status: Supplier Unconfirmed

A crest factor (CF) of 3.5 for single carrier VDSL must also be considered. Calculate
peak-to-peak voltage V
power as follows:
The gain of the line driver circuitry has to be adjusted accordingly to achieve V
output peak-to-peak voltage of the PEB 22811 is 4 V. Thus, the maximum voltage swing
V
(V
The gain of the line driver is determined by resistors R
With R
adjusted.
Figure 23
Preliminary Data Sheet
in
L,p-p
at the line driver’s input is 4 V. In order to achive the desired output voltage of 14 V
V
in
), the gain has to be set to G = 3.5.
F
= 850 R and R
R
Q
+
-
-
+
VDSL Line Driver Application
= 2R
V
AMP1
AMP2
L p p
V
G
+8V
R
R
L p p
= 182
–
F
F
-8V
=1.1K
=1.1K
–
=
Q
L,p-p
= 2
2 3 5
=
Pout = 14.9 dBm
at the line driver output to achieve the required transmission
R
2 CF
1
V
R
V
=34
Lp-p
Lrms
1
R
=34
G
= 2
2V
V
=
G
rms
340 R = 680 R, the desired gain of 3.5 can be
14V
=
68
L
L
impl
133
ins1
HYBRID
1
= 3.0 dB
= 0.5 dB
+
RX
------ -
R
R
G
F
F
and R
Pout = 17.9 dBm
Impedance
R
R
L
L
V
V
=120
G
: Line
Operation – Line Driver
as follows:
V
p
Rev. 1.1, 2005-01-30
out,p-
Line
P
VDSL6100i
PEF 22827
Tx
= 61.6 mW
= 14.5 dBm
LD_App
L,p-p
.The