PEB3265 Infineon Technologies Corporation, PEB3265 Datasheet - Page 130

• Manufacturer Part Number: PEB3265
• Description: (PEB326x / PEB426x) Dual Channel Slicofi-2 / Slic Duslic
• Manufacturer: Infineon Technologies Corporation

Preliminary
Table 36
LM-SEL[3:0] in
register LMCR2
1010
1011
1111
The measurement is accomplished by the DC levelmeter function.
Figure 52
Figure 52
voltage measurements at the Ring and Tip lines.
Since the pins IO3 and IO4 support analog input functionality and are limited to a certain
voltage range of V
to be determined according to following conditions:
• Maximum level of the expected foreign voltages
• Voltage range of IO3 and IO4 = V
The voltage on IO3 or IO4 is measured with a reference to VCM. Hence an input voltage
of V
V
the positive full scale value respectively. For that reason the voltage divider has to be
referenced to VCM. The unknown foreign voltage V
Data Sheet
VCM
VCM
+ 1 V would result into the negative full scale value, V
on either input pin would result into zero output value. Whereas a voltage of
shows the connection and external resistors used for supporting foreign
FOREIGN
VOLTAGE
SOURCE
Measurement Input Selection
Foreign Voltage Measurement Principle
VCM
AC
DC
Measurement Input
Voltage on IO3
Voltage on IO4
Voltage IO4 – IO3
± 1.0 V (typ. 1.5 V ± 1.0 V), the values for the voltage divider has
LINECARD
R3
R4
R2
R1
R
R
PROT
PROT
+ R
+ R
VCM
VCM
STAB
STAB
VCM
SLIC-E/-E2/-P
± 1.0 V
130
FOREIGN
ACN / P
DCN / P
IT
IL
duslic_0009_foreign_voltage.emf
VCM
can be calculated as:
SLICOFI-2
Operational Description
IO4
IO3
– 1 V would result into
2000-07-14
DuSLIC