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T-8502-EL2-D 데이터 시트보기 (PDF) - Agere -> LSI Corporation

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T-8502-EL2-D Dual PCM codec with filters. Tape and reel. Agere
Agere -> LSI Corporation Agere
T-8502-EL2-D Datasheet PDF : 16 Pages
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Data Sheet
July 1998
T8502 and T8503 Dual PCM Codecs with Filters
Transmission Characteristics (continued)
ac Transmission Characteristics (continued)
Table 12. Interchannel Crosstalk (Between Channels) RF = 200 k(See Note.)
Parameter
Transmit to Receive
Crosstalk 0 dBm0
Transmit Levels
Receive to Transmit
Crosstalk 0 dBm0
Receive Levels
Transmit to Trans-
mit Crosstalk
0 dBm0 Transmit
Levels
Receive to Receive
Crosstalk 0 dBm0
Receive Levels
Symbol
CTXX-RY
CTRX-XY
CTXX-XY
CTRX-RY
Test Conditions
f = 300 Hz—3400 Hz
idle PCM code for channel under test;
0 dBm0 into other channel VFXIN
f = 300 Hz—3400 Hz
VFXIN = 0 Vrms for channel under test;
0 dBm0 code level on other channel DR
f = 300 Hz—3400 Hz
VFXIN = 0 Vrms for channel under test;
0 dBm0 into other channel VFXIN
f = 300 Hz—3400 Hz
idle PCM code for channel under test;
0 dBm0 code level on other channel DR
Min Typ Max Unit
— –100 –77 dB
— –92 –77 dB
— –90 –77 dB
— –102 –77 dB
Table 13. Intrachannel Crosstalk (Within Channels) RF = 200 k(See Note.)
Parameter
Transmit to Receive
Crosstalk 0 dBm0
Transmit Levels
Receive to Transmit
Crosstalk 0 dBm0
Receive Levels
Symbol
CTXX-RX
CTRX-XX
Test Conditions
f = 300 Hz—3400 Hz
idle PCM code for channel under test;
0 dBm0 into VFXIN
f = 300 Hz—3400 Hz
VFXIN = 0 Vrms for channel under test;
0 dBm0 code level on DR
Min Typ Max Unit
— –80 –70 dB
— –88 –70 dB
Note: For Tables 12 and 13, crosstalk into the transmit channels (VFXIN) can be significantly affected by parasitic
capacitive feeds from GSX and VFRO outputs. PWB layouts should be arranged to keep these parasitics
low. The resistor value of RF (from GSX to VFXIN) should also be kept as low as possible (while maintaining
the load on GSX above 10 k, per Table 4) to minimize crosstalk.
Lucent Technologies Inc.
9
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