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TEA1062N Datasheet(PDF) 9 Page - Unisonic Technologies

Part # TEA1062N
Description  LOW VOLTAGE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE
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Manufacturer  UTC [Unisonic Technologies]
Direct Link  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

TEA1062N Datasheet(HTML) 9 Page - Unisonic Technologies

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TEA1062N/TEA1062AN
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
9 of 13
www.unisonic.com.tw
QW-R108-011.C
LN
VEE
Leq
Vref
Rp
R1
C3
C1
100
μF
4.7
μF
REG
VCC
R9
20
Ω
Rp=16.2k
Ω
Leq=C3*R9*Rp
Fig.3 Equivalent impedance circuit
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.
Fig. 4 Equivalent circuit of UTC TEA1062N/TEA1062AN anti-sidetone bridge
Fig. 5 Equivalent circuit of an anti-sidetone network in a wheatstone bridge configuration
150
130
110
90
70
50
30
24
68
10
12
(1)
(2)
(3)
(4)
VLN-VSLPE(V)
Iline
(mA)
(1) 45°C 1068mW
(2) 55°C 934mW
(3) 65°C 800mW
(4) 75°C 666mW
Tamb
Ptot
Fig.6 UTC TEA1062N/TEA1062AN safe operating area


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