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TEA7092TQT Fiches technique(PDF) 8 Page - STMicroelectronics

No de pièce TEA7092TQT
Description  TELEPHONE ANALOG FRONT END
Download  24 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TEA7092TQT Fiches technique(HTML) 8 Page - STMicroelectronics

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background image
kVLacpeak
28
SOFTL
R1
26
V
CC
10
µA
kVLdc
2.5V
27
TSOFT
R4
C3
25
V
REF
20
µA20µA
23
MIC1
24
MIC2
25
V
REF
20k
20k
2k
18k
22
HFIN
0dB
0dB
1k
0dB
9k
EARCMF
42
DTMF2
10k
7
DTMF1
I
DTMF
Microphone
Choice
To Anti-acoustic
Feedback
AGC
0 to -6dB
From Anti-acoustic
Feedback (-9dB)
Mute
45k
V
REF
5k
I
L/85
From
DC Path
12
21
25
V
REF
GTR
R8
LOUDSPEAKER
POWER SUPPLY
Mirror 1/40
ITX/41
1
V
LS
C1
+
ITX
3
V
L
ZB =
ZT//CR1//ZL
R1 =
5
4
x R12 -
(Vacpeak + 0.6)
40E-6
Gtl =
V
MIC1 (Pin 23) - VMIC2 (Pin 24)
= 20 log (820 x
)
ZB
R8//50k
V
L (Pin 3)
8k
Figure 5 :
TSOFT (Pin 27) : Transmit Softclipping Time Constant
SOFTL (Pin 28) : Maximum AC Signal (Softclipping Threshold)
MIC1/MIC2 (Pin 23/24) : Microphone Inputs
HFIN (Pin 22) : Handsfree Microphone Input
DTMF1 (Pin 7) : DTMF Input and Filter
DTMF2 (Pin 42) : DTMF Filter
GTR (Pin 21) : Transmit Gain Adjustment
I - TEA7092 GENERAL INFORMATION (continued)
I.4 - Input / Output Configurations (continued)
TEA7092 - TELEPHONE SET INTEGRATED CIRCUIT
8/57


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