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INDUSTRIAL TEMPERATURE RANGEIDT821034 QUAD PCM CODEC WITH PROGRAMMABLE GAIN
Interchannel Crosstalk
Intrachannel Crosstalk
Parameter Description Min Typ Max Units Test Conditions
XTX-R Transmit to Receive Crosstalk -85 -78 dB 300 Hz – 3400 Hz, 0 dBm0 signal into VFXI
of interfering channel. Idle PCM code into
channel under test.
XTR-X Receive to Transmit Crosstalk -85 -80 dB 300 Hz – 3400 Hz, 0 dBm0 PCM code into
interfering channel. VFXI = 0 Vrms for
channel under test.
XT
X-X
Transmit to Transmit Crosstalk -85 -78 dB 300 Hz – 3400 Hz, 0 dBm0 signal into VFXI
of interfering channel. VFXI = 0 Vrms for
channel under test.
XTR-R Receive to Receive Crosstalk -85 -80 dB 300 Hz – 3400 Hz, 0 dBm0 PCM code into
interfering channel. Idle PCM code into
channel under test.
Note: Crosstalk into the transmit channels (VFXI) can be significantly affected by parasitic capacitive coupling from GSX and VFRO outputs. PCB layouts should be arranged to minimize
these parasitics. The resistor value of Rf (from GSX to VFXI) should be kept as low as possible to minimize crosstalk. The limits given above are based on Rf < 200 kΩ.
Parameter Description Min Typ Max Units Test Conditions
XTX-R Transmit to Receive Crosstalk -80 -70 dB 300 Hz – 3400 Hz, 0 dBm0 signal into VFXI.
Idle PCM code into DR.
XT
R-X
Receive to Transmit Crosstalk -80 -70 dB 300 Hz – 3400 Hz, 0 dBm0 PCM code into
DR. VFXI = 0 Vrms.
Note: Crosstalk into the transmit channels (VFXI) can be significantly affected by parasitic capacitive coupling from GSX and VFRO outputs. PCB layouts should be arranged to minimize
these parasitics. The resistor value of Rf (from GSX to VFXI) should be kept as low as possible to minimize crosstalk. The limits given above are based on Rf < 200 kΩ.
