PSB 2134 H V2.2 Infineon Technologies, PSB 2134 H V2.2 Datasheet - Page 80

• Manufacturer Part Number: PSB 2134 H V2.2
• Description: IC CODEC FILTER 4CHAN MQFP-64
• Manufacturer: Infineon Technologies
• Series: SICOFI®r

Specifications of PSB 2134 H V2.2

• Function: CODEC Filter
• Interface: IOM-2 PCM, SPI
• Number Of Circuits: 4
• Voltage - Supply: 5V
• Current - Supply: 26mA
• Power (watts): 130mW
• Mounting Type: Surface Mount
• Package / Case: 64-QFP
• Includes: Level Metering Function, Tone Generation
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Other names: PSB2134HV2.2X; SP000007389; SP000007390

Semiconductor Group
impedance has to be known. Figure 39 shows a simplified model of a subscriber line with
an analog telephone set.
Figure 36
A simplified model of a subscriber line and an analog telephone set
The subscriber line resistance and the subscriber line capacitance are depending on the
cable type. Appendix F shows cable parameters of some cable types at 1 kHz. The cable
parameters multiplied with the line length form the line resistance (R
capacitance (C
The input impedance of the telephone can be measured with an impedance analyzer.
With parallel measuring mode the telephone resistance (R
capacitance (C
The sum of the telephone capacitance and the line capacitance forms the capacitance
ZLC and is an input for QSICOS. The other inputs for QSICOS are R
(ZLR2). With these values QSICOS can calculate coefficients for a high transhybrid loss.
Often the SICOFI2/4-TE is used with the same type of SLIC on all four channels.
Therefore all four coefficient sets can be the same. But for different subscriber line
lengths different transhybrid filter coefficients are necessary. For getting a high
transhybrid loss it is useful to calculate TH-filter coefficient sets for 4 different subscriber
line lengths and to store them in the coefficient RAM. With the help of the Level Metering
Function the best coefficient set with the highest transhybrid loss can be selected for
each channel.
So an improving of the transhybrid balancing by measuring the transhybrid loss and
loading or selecting another coefficient set is possible. No external measuring devices
are necessary.
C=C
SPEC-File of QSICOS software:
L
+C
ring
tip
T
ZL = 1 (circuit 1)
ZLR1 = RL
ZLR2 = RT
ZLC = C
subscriber line
L
T)
).
in the off-hook state can be determined.
R
L
C
L
.
.
C
T
analog
telephone
set
.
.
R
T
80
=
ring
tip
Application Note: Level Metering
R
L
C
.
.
T
) and the telephone
R
T
L
L
(ZLR1) and R
) and the line
PSB 2132
PSB 2134
09.97
T