TEA1062N_09 Datasheet, PDF (12/13 Pages) Unisonic Technologies – LOW VOLTAGE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE

TEA1062N/TEA1062AN
LINEAR INTEGRATED CIRCUIT
Voltage gain is defined as: G_V=20*log(|V_O/V_I|). For measuring the gain from MIC+ and MIC- the MUTE input
should be HIGH(UTC TEA1062N is LOW) or open-circuit, for measuring the DTMF input MUTE should be
LOW(UTC TEA1062N is HIGH) .Inputs not under test should be open-circuit.
C1
100μF
10 μF
Vi
R1=620Ω
13
VCC
10 _IR
7 _MIC+
6 _MIC-
11 _DTMF
1
LN
4
QR
GAR ₅
GAS1 ²
12 _MUTE
GAS2 ³
VEE REG AGC STAB SLPE
9
14 15 8 16
C3
4.7 μF
R6
R5 R9
3.6kΩ 20Ω
R4
100kΩ
100 μF
C2 _ZL
C4 Vo
100pF
600Ω
C7 1nF
R7
68kΩ
C8 1nF
C6
100pF
10 TO 140 mA
Fig.14 Test circuit for defining voltage gain of the receiving amplifier.
Voltage gain is defined as: G_V=20*log(|V_O/V_I|).
R10
130Ω
BAS11
(x2)
Telephone
Line
BZW14
(x2)
BZX79
C12
R1
620Ω
R2
132kΩ
C5
100nF
1
10
LN
IR
13
VCC
C1
100 μF
C2
R3
3.92kΩ
R4
C4 ^{4 QR}
100pF
5 GAR
UTC TEAI062N
UTC TEA1062AN
DTMF ¹¹
C7
7 _MIC+
1nF
6
MIC-
12
MUTE
R8
390Ω
Zbal
R9
20Ω
SLPE GAS1 GAS2
16
2
3
C6
100pF _R7
REG AGC STAB VEE
14
15
89
RVA(R16.R14)
C8
C3
1nF
4.7 μF
R6
R5
3.6kΩ
From dial and
control circuits
Fig.15 Typical application of the UTC TEA1062AN, shown here with a piezoelectric earpiece and DTMF dialling. The
bridge to the left, the Zener diode and R10 limit the current into the circuit and the voltage across the circuit during
line transients. Pulse dialling or register recall required a different protection arrangement.
The DC line voltage can be set to a higher value by resistor R_VA(REG to SLPE).
Fig.16 Typical applications of the UTC TEA1062N/TEA1062AN (simplified)
The dashed lines show an optional flash (register recall by timed loop break).
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R108-011.C