TEA1062AN-D16-T UTC [Unisonic Technologies], TEA1062AN-D16-T Datasheet - Page 9

• Manufacturer Part Number: TEA1062AN-D16-T
• Description: LOW VOLTAGE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE
• Manufacturer: UTC [Unisonic Technologies]

TEA1062N/TEA1062AN
The anti-sidetone network for the UTCTEA1062N/TEA1062AN family shown in Fig.4 attenuates the signl received
from the line by 32 dB before it enters the receiving amplifier. The attenuation is almost constant over the whole
audio frequency range. Fig.5 shows a convertional Wheatstone bridge anti-sidetone circuit that can be used as an
alternative. Both bridge types can be used with either resistive or complex set impedances.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
Fig. 5 Equivalent circuit of an anti-sidetone network in a wheatstone bridge configuration
Fig. 4 Equivalent circuit of UTC TEA1062N/TEA1062AN anti-sidetone bridge
V
LN
Fig.6 UTC TEA1062N/TEA1062AN safe operating area
EE
I
(mA)
line
150
130
110
90
70
50
30
2
Fig.3 Equivalent impedance circuit
Leq
R9
20Ω
Vref
4
6
Rp
REG
C3
4.7 μF
8
V
LN
10
-V
(3)
C1
(4)
V
R1
(1)
100 μF
(2)
SLPE
CC
(V)
12
(1) 45°C 1068mW
(2) 55°C 934mW
(3) 65°C 800mW
(4) 75°C 666mW
LINEAR INTEGRATED CIRCUIT
Rp=16.2kΩ
Leq=C3*R9*Rp
Tamb
Ptot
QW-R108-011.C
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