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IDT821054 QUAD PROGRAMMABLE PCM CODEC WITH MPI INTERFACE
INDUSTRIAL TEMPERATURE RANGE
7.6
NOISE
7.7
INTERCHANNEL CROSSTALK
7.8
INTRACHANNEL CROSSTALK
Note: Crosstalk into transmit channels (VIN) can be significantly affected by parasitic capacitive coupling from VOUT outputs. PCB layouts should be arranged to minimize the parasitics.
Parameter
Description
Min.
Typ.
Max.
Units
Test Conditions
NXC
Transmit noise, C-message weighted for -law
15
dBrnC0
NXP
Transmit noise, psophometrically weighted for A-law
70
dBm0p
NRC
Receive noise, C-message weighted for -law
10
dBrnC0
NRP
Receive noise, psophometrically weighted for A-law
80
dBm0p
NRS
Noise, single frequency
f = 0 kHz to 100 kHz
53
dBm0
VIN = 0 Vrms, tested at VOUT
PSRX
Power supply rejection, transmit
f = 300 Hz to 3.4 kHz
f = 3.4 kHz to 20 kHz
40
25
dB
VDD = 5.0 VDC+100 mVrms
PSRR
Power supply rejection, receive
f = 300 Hz to 3.4 kHz
f = 3.4 kHz to 20 kHz
40
25
dB
VDD = 5.0 VDC+100 mVrms, PCM code is
positive one LSB
SOS
Spurious out-of-band signals at VOUT, relative to
input PCM code applied:
f = 4.6 kHz to 20 kHz
f = 20 kHz to 50 kHz
40
30
dB
0 dBm0, 300 Hz to 3400 Hz input
Parameter
Description
Min.
Typ.
Max.
Units
Test Conditions
XTX-R
Transmit to receive crosstalk
85
78
dB
300 Hz to 3400 Hz, 0 dBm0 signal into VIN of the interfering
channel. Idle PCM code into the channel under test.
XTR-X
Receive to transmit crosstalk
85
80
dB
300 Hz to 3400 Hz, 0 dBm0 PCM code into the interfering channel.
VIN = 0 Vrms for the channel under test.
XTX-X
Transmit to transmit crosstalk
85
78
dB
300 Hz to 3400 Hz, 0 dBm0 signal into VIN of the interfering
channel. VIN = 0 Vrms for the channel under test.
XTR-R
Receive to receive crosstalk
85
80
dB
300 Hz to 3400 Hz, 0 dBm0 PCM code into the interfering channel.
Idle PCM code into the channel under test.
Parameter
Description
Min.
Typ.
Max.
Units
Test Conditions
XTX-R
Transmit to receive crosstalk
80
70
dB
300 Hz to 3400 Hz, 0 dBm0 signal into VIN. Idle PCM code into
DR.
XTR-X
Receive to transmit crosstalk
80
70
dB
300 Hz to 3400 Hz, 0 dBm0 PCM code into DR. VIN = 0 Vrms.
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