st5080d STMicroelectronics, st5080d Datasheet - Page 30

• Manufacturer Part Number: st5080d
• Description: Piafe Programmable Isdn Audio Front End
• Manufacturer: STMicroelectronics

ST5080A
DISTORTION
CROSSTALK
APPLICATION NOTE FOR MICROPHONE CONNECTIONS
The 4 connection modes (since the MIXED MODE is symmetrical with respect to MIC1 and MIC2) allow
one microphone at a time to be selected via the V
30/32
Symbol
Symbol
S
S
C
C
S
S
IMD
TDx
DFx
TDr
DFr
Tx-r
Tr-x
Signal to Total Distortion
Single Frequency Distortion
transmit
Single Frequency Distortion
receive
Intermodulation
Transmit to Receive
Receive to Transmit
Parameter
Parameter
Sinusoidal Test Methode
(measured using C message
weighting Filter)
Level = 0 dBm0 to - 20 dBm0
Level = - 20 to -30 dBm0
Level = - 40 dBm0
Level = - 45 dBm0
0 dBm0 input signal
0 dBm0 input signal
Loop-around measurament
Voltage at V
to -21 dBm0, 2 Frequencies in
the range 300 - 3400 Hz
Transmit Level = 0 dBm0,
f = 300 - 3400 Hz
DR = QuietPCM Code
Receive Level = 0 dBm0,
f = 300 - 3400 Hz
V
MIC
= 0V
S
Test Condition
Test Condition
bit (bit 7 of Control Register CR4).
MIC
= -4 dBm0
Min.
Min.
37
36
29
24
Typ.
Typ.
Max.
Max.
-46
-46
-41
-65
-65
Unit
dBC
dBC
dBC
dBC
Unit
dB
dB
dB
dB
dB