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TEA7092 Arkusz danych(PDF) 6 Page - STMicroelectronics

Numer części TEA7092
Szczegółowy opis  TELEPHONE ANALOG FRONT END
Download  24 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TEA7092 Arkusz danych(HTML) 6 Page - STMicroelectronics

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25
100k
100k
Ip
Internal Amp-op
Current Supply
26
C8
+
C14
+
±1mA
V
REF
V
CC
29
I
REF
R2
30k
Internal
I
REF
300mV
R10
R11a + R11b
3 VL
From Line
The sum of all the currents on Pin 26 (V
CC) is equal to 1.3mA
(without ac receive signal)
Figure 1 :
VREF (Pin 25) : Transmit and Receive Reference Voltage (VCC/2)
VCC (Pin 26) : Transmit and Receive Power Supply
IREF (Pin 29) : Internal Reference Current
30
C11
225k
V
S
V
CC
R3
31
SLPE
R12
3
V
L
MIRROR
1.5
1
I
L/85
(to transmit
channel)
V
CC
50
µA
V
CC
11
µA
kIL =
I
L - 5.6mA
Rslope = R3/55
V
L = R12 x (40 + 0.5 x IL)E
-6
+ Rslope (I
L - 5.6) E
-3
;I
L in mA (for IL < 20mA)
V
L =VL (at 20mA) + Rslope x (IL -20) E
-3
;I
L in mA (for IL > 20mA)
1016
kIL =
I
L - 5.6mA
1016
Figure 2 :
SLPE (Pin 31) : DC Mask Slope
VS (Pin 30) : Shunt Regulator
I - TEA7092 GENERAL INFORMATION (continued)
I.4 - Input / Output Configurations
TEA7092 - TELEPHONE SET INTEGRATED CIRCUIT
6/57


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