PEB3265 Infineon Technologies Corporation, PEB3265 Datasheet - Page 131

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

Preliminary
V
V
The resistor directly connected to either Ring or Tip (R1, R3) should be high enough so
that the loop impedance will not be affected by them. Several M s, e.g. 10 M
be a reasonable value. The following example illustrates the potential voltage range that
can be measured by chosing the values as:
• R1 = R3 = 10 M
• R2 = R4 = 47 k
The values given for the maximum and minimum voltage levels are:
• V
• V
• V
The voltage range would span from 215 V to – 212 V.
In order to measure small input voltages on IO3/IO4 more accurately the user might
consider to enable the integration function (see
register LMCR1 to 1.
In case of measuring the ring voltage supplied to either Ring or Tip or even both
(balanced ringing) pins via IO3 and IO4, the rectifier can be enabled by setting bit
LM-RECT in register LMCR2 to 1.
Data Sheet
V
V
V
INPUT
IOx
FOREIGN max
FOREIGN min
FOREIGN
VCM
INPUT,max
INPUT,min
= Voltage on pins IOx (e.g. pins IO3, IO4)
= V
= 1.5 V
IOx
=
= – 1 V
= 1 V
V
– V
INPUT
=
=
VCM
V
V
INPUT min
INPUT max
(refer to
= V
R1
--------------------- -
= V
IOX,max
IOX,min
R2
+
R2
Table
R1
--------------------- -
= 2.5 V
R1
--------------------- -
+
= 0.5 V
R2
V
+
R2
VCM
+
R2
31)
R2
+
131
+
V
V
VCM
VCM
=
Figure
=
– 212 V
215 V
45) by setting bit LM-EN in
Operational Description
2000-07-14
DuSLIC
would