TEA1062AN [UTC]
LOW VOLTAGE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE; 与拨号器接口低电压电话传输电路
| 型号： | TEA1062AN |
| 厂家： | 
Unisonic Technologies |
| 描述： | LOW VOLTAGE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE |
| 文件： | 总13页 (文件大小：180K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UTCTEA1062N / TEA1062AN
LINEAR INTEGRATED CIRCUIT
LOW VOLTAGE TELEPHONE
TRANSMISSION CIRCUIT WITH
DIALLER INTERFACE
DESCRIPTION
The UTC TEA1062N / TEA1062AN is a bipolar
integrated circuit performing all speech and line
interface function, required in the fully electronic
SOP-16
DIP-16
telephone
sets. It performs electronic switching
between dialing speech. The circuit is able to
operate down to D.C. line voltage of 1.6V (with
reduced performance) to facilitate the use of more
telephone sets in parallel.
FEATURES
* Low d.c. line voltage; operates down to 1.6V
(excluding polarity guard).
*Voltage regulator with adjustment static resistance.
*Provides supply with limited current for external
circuitry.
*Mute input for pulse or DTMF dialing.
*Receivering amplifier for several types of earphones.
*Large amplification setting range on microphone
and earpiece amplifiers.
*Line loss compensation facility , line current
depedant (microphone and earpiece amplifiers).
*Gain control adaptable to exchange supply.
*Possibility to adjust the d.c. line voltage.
*Symmetrical high-impedance inputs (64kΩ) for
dynamic, magnetic or piezoelectric microphones.
*Asymmetrical high-impedance inputs (32kΩ) for
electret microphones.
*DTMF signal input with confidence tone.
QUICK REFERENCE DATA
Line voltage at Iline=15mA
Line current operating range[pin1]
normal operation
VLN
typ. 3.8 V
Iline
Iline
ICC
11 to 140 mA
1 to 11 mA
typ. 1mA
with reduced performance
Internal supply current
Supply current for peripherials
at Iline=15 mA MUTE input LOW(1062 is HIGH)
VCC>2.2V
Ip
Ip
typ. 1.8mA
typ. 0.7mA
VCC>2.8V
Voltage amplification range
microphone amplifier
AVD
AVD
44 to 52 dB
20 to 39 dB
receiving amplififer
Line loss compansation
Amplification control range
Exchange supply voltage range
Exchange feeding bridge resistance range
Operating ambient temperature range
AVD
typ. 6 dB
36 to 60V
Vexch
Rexch
Tamb
400 to 1000Ω
-25 to +75°C
1
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-011,A
UTCTEA1062N / TEA1062AN
LINEAR INTEGRATED CIRCUIT
V
13
CC
LN
1
5
4
GAR
QR
IR 10
2
3
GAS1
GAS2
MIC+
7
6
MIC-
11
12
dB
DTMF
MUTE
SUPPLY AND
REFERENCE
LOW
VOLTAGE
CIRCUIT
CONTROL
CURRENT
CURRENT
REFERENCE
9
14
REG
15
AGC
8
16
SLPE
VEE
STAB
Fig.1 Block Diagram
1
2
3
4
5
6
7
8
9
LN
positive line terminal
LN
1
2
3
4
5
6
7
8
16 SLPE
GAS1 gain adjustment; transmitting amplifier
GAS2 gain adjustment; transmitting amplifier
AGC
15
QR
non-inverting output,receiving amplifier
GAS1
GAS2
GAR gain adjustment; receiving amplifier
MIC- inverting microphone input
MIC+ on-inverting microphone input
STAB current stabilizer
14
13
12
11
10
9
REG
QR
VCC
VEE
negative line terminal
receiving amplifier input
GAR
MIC-
MIC+
STAB
MUTE
DTMF
IR
10 IR
11 DTMF dual-tone multi-frequency input
12 MUTE mute input
13 Vcc
14 REG voltage regulator decoupling
15 AGC automatic gain control input
16 SLPE slope (DC resistance) adjustment
positive supply decoupling
VEE
Fig.2 PIN CONFIGURATIONS
2
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-011,A
UTCTEA1062N / TEA1062AN
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Positive Continuous Line Voltage
Repetitive Line Voltage During
TEST CONDITIONS SYMBOL MIN
MAX
12
UNIT
V
VLN
Switch-On Or Line Interruption
VLN
13.2
V
Repetitive Peak Line Voltage for a 1 ms Pulse/5s
R10=13Ω
R9=20Ω
(see Fig.15)
R9=20Ω
VLN
Iline
Vi
28
140
VCC+0.7
0.7
640
+125
+75
+125
V
mA
V
Line Current (1)
Voltage on All Other Pins
-Vi
V
Total Power Dissipation (2)
Storage Temperature Range
Operating Ambient Temperature Range
Junction Temperature
R9=20Ω
Ptot
Tstg
Tamb
Tj
mW
°C
°C
°C
-40
-25
1. Mostly dependent on the maximum required Tamb and the voltage between LN and SLPE (see Figs 6 ).
2. Calculated for the maximum ambient temperature specified Tamb=75°C and a maximum junction temperature of
125°C.
THERMAL RESISTANCE
From junction to ambient in free air Rth j-a = 75K/W
ELECTRICAL CHARACTERISTICS (Iline=11 to 140mA;VEE=0V;f=800Hz;Tamb=25°C; unless otherwise
specified)
PARAMETER
Supply; LN and VCC(pins 1 and 13)
Voltage Drop Over Circuit,
between LN and VEE
TEST CONDITIONS
SYMBOL MIN
TYP MAX UNIT
MIC inputs open
Iline=1mA
Iline=4mA
Iline=15mA
Iline=100mA
Iline=140mA
Iline=15mA
VLN
VLN
1.6
1.9
4.0
5.7
V
V
VLN
VLN
3.55
4.9
4.25
6.5
7.5
V
V
V
VLN
Variation with Temperature
Voltage Drop Over Circuit,
between LN and VEE with
External Resistor RVA
∆VLN/∆T
-0.3
mV/K
Iline=15mA
RVA(LN to REG)
=68kΩ
3.5
V
Iline=15mA
RVA(REG to SLPE)
=39kΩ
4.5
0.9
V
Supply Current
VCC=2.8V
ICC
1.35
mA
Supply Voltage Available for
Peripheral Circuitry
TEA1062N
Iline=15mA
Ip=1.2mA; MUTE=HIGH
lp=0mA;MUTE=HIGH
Ip=1.2mA; MUTE=LOW
lp=0mA;MUTE=LOW
VCC
VCC
VCC
VCC
2.2
2.2
2.7
3.4
2.7
3.4
V
V
V
V
TEA1062AN
3
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-011,A
UTCTEA1062N / TEA1062AN
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS (continued)
PARAMETER
TEST CONDITIONS
SYMBOL MIN
TYP MAX UNIT
Microphone inputs MIC+ and MIC- (pins 6 and 7)
Input impedance (differential)
between MIC- and MIC+
｜Zi｜
64
kΩ
Input impedance (sigle-ended)
｜Zi｜
kCMR
MIC- or MIC+ to VEE
32
82
kΩ
dB
Common Mode Rejection Ratio
Voltage Gain
MIC+ or MIC- to LN
Iline=15mA
R7=68kΩ
Gv
50.5
52.0
53.5
dB
dB
Gain Variation with Frequency
at f=300Hz and f=3400Hz
Gain Variation with Temperature
at -25°C and +75°C
w.r.t.800Hz
∆Gvf
+-0.2
w.r.t.25°C
without R6;
Iline=50mA
∆GvT
｜Zi｜
Gv
+-0.2
20.7
25.5
+-0.2
dB
kΩ
dB
dB
Dual-tone multi-frequency input DTMF (pin 11)
Input impedance
Voltage Gain from DTMF to LN
Iline=15mA
R7=68kΩ
24
27
Gain Variation with Frequency
at f=300Hz and f=3400Hz
Gain Variation with Temperature
at -25°C and +75°C
w.r.t.800Hz
∆Gvf
w.r.t.25°C
Iline=50mA
∆GvT
∆Gv
+-0.2
dB
dB
Gain Adjustment GAS1 and GAS2 (pins 2 and 3)
Gain Variation of the Transmitting
Amplifier by Varying R7 between
GAS1 and GAS2
-8
0
Sending Amplifier Output LN (pin 1)
Output Voltage
Iline=15mA
THD=10%
VLN(rms)
VLN(rms)
1.7
2.3
0.8
V
V
Iline=4mA
THD=10%
Noise output voltage
Iline=15mA;
R7=68kΩ;
200Ω between
MIC- and MIC+;
psophometrically
weighted
VNO(rms)
｜Zi｜
-69
21
4
dBmp
kΩ
Receiving Amplifier Input IR (pin 10)
Input impedance
Receiving Amplifier Output QR (pin 4)
Output Impedance
Voltage gain from IR to QR
｜Zo｜
Ω
Iline=15mA;
RL(from pin 9 to
pin 4 )=300Ω
Gv
29.5
31
32.5
dB
4
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-011,A
UTCTEA1062N / TEA1062AN
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS (continued)
PARAMETER
Gain Variation with Frequency
at f=300Hz and f=3400Hz
Gain Variation with Temperature
at-25°C and +75°C
TEST CONDITIONS
SYMBOL MIN
TYP MAX UNIT
±0.2
w.r.t.800Hz
∆Gvf
dB
w.r.t.25°C
without R6
Iline=50mA
sinwave drive;
Ip=0mA;THD=2%
R4=100kΩ
Iline=15mA
RL=150Ω
∆GvT
+-0.2
dB
Output Voltage
VO(rms)
VO(rms)
0.22
0.3
0.33
0.48
V
V
RL=450Ω
Output Voltage
THD=10%
R4=100kΩ
RL=150Ω
Iline=4mA
VO(rms)
15
50
mV
Noise Output Voltage
Iline=15mA
R4=100kΩ
IR open-circuit
psophometrically
weighted
μV
RL=300Ω
VNO(rms)
Gain adjustment GAR (pin 5)
Gain Variation of Receiving
Amplifier Achievable by
Varying
R4 between GAR and QR
Mute Input (pin 12)
Input Voltage(HIGH)
Input Voltage(LOW)
Input Current
∆Gv
-11
1.5
0
dB
VIH
VIL
IMUTE
VCC
0.3
15
V
V
μA
8
Reduction of Gain
MIC+ or MIC- to QR
Voltage Gain from DTMF to QR
MUTE=LOW
MUTE=LOW
R4=100kΩ
RL=300Ω
∆Gv
70
dB
dB
Gv
-19
Automatic Gain Control Input AGC ( pin 15)
Controlling the Gain from lR to QR
and the Gain from MIC+/MIC-
to LN;R6 between AGC and VEE R6=110kΩ
Gain Control Range
Highest Line Current
for Maximum Gain
Iline=70mA
∆Gv
Iline
Iline
-5.8
23
dB
mA
mA
Minimum Line Current
for Minimum Gain
61
5
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-011,A
UTCTEA1062N / TEA1062AN
LINEAR INTEGRATED CIRCUIT
FUNCTIONAL DESCRIPTION
(with built-in FET source followers) can be used.
Supply: VCC, LN, SLPE, REG and STAB
Power for the UTC TEA1062N/TEA1062AN and its
peripheral circuits is usually obtained from the
telephone line. The IC supply voltage is derived from
the line via a dropping resistor and regulated by the
UTC TEA1062N/TEA1062AN,The supply voltage Vcc
may also be used to supply external circuits e.g.
dialling and control circuits. Decoupling of the supply
voltage is performed by a capacitor between Vcc and
VEE while the internal voltage regulator is decoupled
by a capacitor between REG and VEE. The DC current
drawn by the device will vary in accordance with
varying values of the exchange voltage(Vexch), the
feeding bridge resistance(Rexch) and the DC resistance
Microphone arrangements are illustrated in Fig.10. The
gain of the microphone amplifier can be adjusted
between 44dB and 52dB to suit the sensitivity of the
transducer in use. The gain is proportional to the value
of R7 which is connected between GAS1 and GAS2.
Stability is ensured by the external capacitors, C6
connected between GAS1 and SLPE and C8
connected between GAS1 and VEE. The value of C6
is 100pF but this may be increased to obtain a
first-order low-pass filter. The value of C8 is 10 times
the value of C6. The cut-off frequency corresponds to
the time constant R7*C6.
Mute input (MUTE)
of
the
telephone
line(Rline).
The
UTC
TEA1062N/TEA1062AN has an internal current
stabilizer operating at a level determined by a 3.6kΩ
resistor connected between STAB and VEE( see
Fig.8). When the line current(Iline) is more than 0.5 mA
greater than the sum of the IC supply current ( Icc) and
the current drawn by the peripheral circuitry connected
to VCC(lp) the excess current is shunted to VEE via LN.
The regulated voltage on the line terminal(VLN) can be
calculated as:
A LOW(UTC TEA1062N is HIGH) level at MUTE
enables DTMF input and inhibites the microphone
inputs and the receiving amplifier inputs; a HIGH(UTC
TEA1062N is LOW) level or an open circuit does the
reverse. Switching the mute input will cause negligible
clickis at the telephone outputs and on the line. In case
the line current drops below 6mA(parallal opration of
more sets) the circuit is always in speech condition
independant of the DC level applied to the MUTE input.
VLN=Vref+ISLPE*R9 or;
VLN=Vref+[(Iline – ICC - 0.5*10 3A)－Ip]*R9
-
Dual-tone multi-frequency input (DTMF)
When the DTMF input is enabled dialling tones may
be sent onto the line. The voltage gain from DTMF to
LN is typically 25.5dB(when R7=68kΩ) and varies with
R7 in the same way as the microphone gain. The
signalling tones can be heard in the earpiece at a low
level(confidence tone).
where:Vref is an internally generated temperature
compensated reference voltage of 3.7V and R9 is an
external resistor connected between SLPE and VEE. In
normal use the value of R9 would be 20Ω. Changing
the value of R9 will also affect microphone gain, DTMF
gain,gain control characteristics, side tone level,
maxmimum output swing on LN and the DC
characteristics (especially at the lower voltages). Under
normal conditions, when ISLPE>=ICC+0.5mA +Ip, the
static behaviour of the circuit is that of a 3.7V regulator
diode with an internal resistance equal to that of
R9.In the audio frequency range the dynamic
impedance is largely determined by R1.Fig.3 shows
the equivalent impedance of the circuit.
Receiving amplifier (IR,QR and GAR)
The receiving amplifier has one input (IR) and a
non-inverting output (QR). Earpiece arrangements are
illustrated in Fig.11. The IR to QR gain is typically 31dB
(when R4=100kΩ). It can be adjusted between 20 and
31dB to match the sensitivity of the transducer in use.
The gain is set with the value of R4 which is connected
between GAR and QR.The overall receive gain,
between LN and QR, is calculated by substracting the
anti-sidetone network attenuation (32dB) from the
amplifier gain. Two external capacitors, C4 and C7,
ensure stability. C4 is normally 100pF and C7 is 10
times the value of C4. The value of C4 may be
increased to obtain a first-order low-pass filter.The
Microphone inputs(MIC+ and MIC-) and
gain pins (GAS1 and GAS2)
The UTC TEA1062N/TEA1062AN has symmetrical
inputs. Its input impedance is 64kΩ (2*32kΩ) and its
voltage gain is typically 52 dB (when R7=68kΩ.see
Fig.13). Dynamic, magnetic, piezoelectric or electret
6
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-011,A
UTCTEA1062N / TEA1062AN
LINEAR INTEGRATED CIRCUIT
cut-off frequency will depend on the time constant
R4*C4. The output voltage of the receiving amplifier is
specified for continuous-wave drive. The maximum
output voltage will be higher under speech conditions
where the peak to RMS ratio is higher.
Example
The balance impedance Zbal at which the optimum
suppression is present can be calculated by: Suppose
Zline = 210Ω+(1265Ω//140nF) representing a 5km line
of 0.5 mm diameter, copper, twisted pair cable
matched to 600Ω(176Ω/km;38nF/km). When k=0.64
then R8=390Ω,Zbal=130Ω+(820Ω//220nF). At line
currents below 9mA the internal reference voltage is
automatically adjusted to a lower value(typically 1.6V
at 1mA) This means that more sets can be operated in
parallel with DC line voltages (excluding the polarity
guard) down to an absolute minimum voltage of 1.6V.
With line currents below 9mA the circuit has limited
sending and receiving levels. The internal reference
voltage can be adjusted by means of an external
resistor(RVA). This resistor when connected between
LN and REG will decrease the internal reference
voltage and when connected between REG and SLPE
will increase the internal reference voltage. Current(Ip)
available from VCC for peripheral circuits depends on
the external components used. Fig.9 shows this
current for VCC > 2.2V. If MUTE is LOW (1062 is HIGH)
when the receiving amplifier is driven the available
current is further reduced. Current availability can be
Automatic gain control input (AGC)
Automatic line loss compensation is achieved by
connecting a resistor(R6) between AGC and VEE. The
automatic gain control varies the gain of the
microphone amplifier and the receiving amplifier in
accordance with the DC line current. The control range
is 5.8dB which corresponds to a line length of 5km for
a 0.5mm diameter twisted pair copper cable with a DC
resistance of 176Ω/km and average attenuation of
1.2dB/km. Resistor R6 should be chosen inaccordance
with the exchange supply voltage and its feeding
bridge resistance(see Fig.12 and Table 1). The ratio of
start and stop currents of the AGC curve is
independent of the value of R6. If no automatic line
loss compensation is required the AGC may be left
open-circuit. The amplifier, in this condition, will give
their maximum specified gain.
increased
by connecting the supply IC(1081) in
Side-tone suppression
parallel with R1, as shown in Fig.16(c), or, by
increasing the DC line voltage by means of an
external resistor(RVA) connected between REG and
SLPE.
The anti-sidetone network, R1//Zline, R2, R3, R8, R9
and Zbal,(see Fig.4) suppresses the transmitted signal
in the earpiece. Compensation is maximum when the
following conditions are fulfilled:
(a) R9*R2=R1[R3+(R8//Zbal)];
(b) [Zbal/(Zbal+R8)]=[Zline/(Zline+R1)];
If fixed values are chosen for R1, R2, R3 and R9 then
condition(a) will always be fullfilled when R8/Zball《R3.
To obtain optimum side-tone suppression condition(b)
has to be fulfilled which results in:
Zbal=(R8/R1) Zline=k*Zline where k is a scale factor;
K=(R8/R1).
The scale factor (k), dependent on the value of R8,
is chosen to meet following criteria:
(a) Compatibility with a standard capacitor from the
E6 or E12 range for Zbal,
(b)｜Zbal//R8｜《R3 fulfilling condition (a) and thus
ensuring correct anti-sidetone bridge operation,
(c) ｜Zbal+R8｜》R9 to avoid influencing the trans-
mitter gain.
In practice Zline varies considerably with the type and
length. The value chosen for Zbal should therefore be
for an average line length thus giving optimum setting
for short or long lines.
7
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-011,A
UTCTEA1062N / TEA1062AN
LINEAR INTEGRATED CIRCUIT
LN
Leq
Rp
R1
REG
V
CC
Vref
R9
C3
C1
4.7
µ
F
100
µF
Rp=16.2k
Ω
20
Ω
Leq=C3*R9*Rp
VEE
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.
R1
R2
R3
R1
R2
Zline
Zline
IR
IR
i
m
im
V
EE
V
EE
Rt
Rt
R8
R8
R9
R9
RA
Zbal
SLPE
SLPE
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
8
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-011,A
UTCTEA1062N / TEA1062AN
LINEAR INTEGRATED CIRCUIT
I
line 150
(mA)
130
110
90
(1)
(2)
(3)
(4)
70
Tamb
Ptot
(1) 45°C 1068mW
(2) 55°C 934mW
(3) 65°C 800mW
(4) 75°C 666mW
50
30
2
4
6
8
10
12
VLN-VSLPE(V)
Fig.6 UTC TEA1062N/TEA1062AN safe operating area
Rline
R1
Iline
0.5mA
LN
I
SLPE+
VCC
Rexch
Vexch
DC
AC
C1
0.5mA
PERIPHERAL
CIRCUITS
SLPE
REG
STAB
VEE
C3
I
SLPE
R5
R9
Fig.8 Supply arrangement
9
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-011,A
UTCTEA1062N / TEA1062AN
LINEAR INTEGRATED CIRCUIT
2.4
a
I
p
(mA)
b
1.6
0.8
0
(a) Ip=2.1mA
(b) Ip=1.7mA
Iline=15mA at VLN=4V
R1=620
Ω and R9=20Ω
0
1
2
3
4
5
V
cc(V)
Fig.9 Typical current Ip available from Vcc peripheral circuitry with Vcc>=2.2V.
curve (a) is valid when the receiving amplifier is not driven or when MUTE =LOW(UTC TEA1062N is
HIGH) .curve(b) is valid when MUTE=HIGH(UTC TEA1062N is LOW) and the receiving amplifier is driven;
Vo(rms)=150mV,RL=150Ω.The supply possibilities can be increased simply by setting the voltage drop over
the circuit VLN to a high value by means of resistor RVA connected between REG and SLPE.
7
7
MIC+
MIC+
13
V
CC
(1)
7
6
MIC+
MIC-
V
EE
MIC-
MIC-
6
6
9
(a)
(b)
(c)
Fig. 10 Alternative microphone arrangement
(a) Magnetic or dynamic microphone. The resistor marked(1) may be connected to decrease the terminating
impedance.
(b) Electret microphone.
(c) Piezoelectric microphone.
10
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-011,A
UTCTEA1062N / TEA1062AN
LINEAR INTEGRATED CIRCUIT
(1)
(2)
4
4
4
9
QR
QR
QR
9
9
VEE
VEE
VEE
(a)
(b)
Fig.11 Alternative receiver arrangement
(c)
(a) Dynamic earpiece.
(b) Magnetic earpiece.The resistor marked(1) may be connected to prvent distortion(inductive load)
(c) Piezoelectric earpiece.The earpiece marked(2) is requirred to increase the phase margin (capacitive load)
Fig.12 Variation of gain with line urrent,with R6 as a parameter.
﹢
R6=
→Gv
(dB)
0
-2
-4
R9=20
Ω
(1) R6= 78.7k
Ω
(1) (2) (3)
(2) R6= 110k
(3) R6= 140k
Ω
Ω
-6
0
20
40
60
80
100 120 140
Iline (mA)
Rexch(Ω)
600
400
800
1000
R6(kΩ)
78.7
×
×
82
36
48
60
100
140
×
Vexch(V)
110
93.1
120
×
102
Table 1 Values of resistor R6 for optimum line loss compensation,for various usual values of exchange
supply vloltage(Vexch) and exchange feeding bridge resistance(Rexch);R9=20Ω.
11
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-011,A
UTCTEA1062N / TEA1062AN
LINEAR INTEGRATED CIRCUIT
R1 620
Ω
100 µF
13
1
10
7
IR VCC
MIC+
LN
4
R
L
QR
C4
R4
600Ω
100pF
Vi
100k
Ω
6
5
2
MIC-
GAR
GAS1
GAS2
C1
100
10 TO 140 mA
C7 1nF
Vo
µ
F
11
DTMF
R7
12
MUTE
68k
Ω
C8 1nF
3
10
Vi
µF
VEE REG AGC STAB SLPE
C6
100pF
9
14 15
8
16
C3
4.7
R6
µ
F
R5
3.6k
R9
20
Ω
Ω
Fig.13 Test circuit defining voltage gain of MIC+,MIC- and DTMF inputs.
Voltage gain is defined as : GV=20*log(|VO/Vi|).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.
R1=620
Ω
100 µF
1
13
VCC
C2
LN
Z
L
4
10
7
IR
QR
600Ω
R4
100k
C4 Vo
100pF
MIC+
Ω
GAR
5
2
10 TO 140 mA
6
C7 1nF
MIC-
C1
100
GAS1
µ
F
11
DTMF
R7
68k
C8 1nF
Ω
3
12
GAS2
MUTE
10
Vi
µF
C6
100pF
VEE REG AGC STAB
SLPE
16
9
14 15
8
C3
4.7
R6
µ
F
R5
3.6k
R9
Ω
20Ω
Fig.14 Test circuit for defining voltage gain of the receiving amplifier.
Voltage gain is defined as: GV=20*log(|VO/Vi|).
12
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-011,A
UTCTEA1062N / TEA1062AN
LINEAR INTEGRATED CIRCUIT
R1
620
Ω
R10
130
R2
C5
Ω
132k
Ω
C1
100
BZX79
C12
100nF
1
LN
13
VCC
BAS11
(x2)
µ
F
10
IR
C2
R3
4
QR
Telephone
Line
C4
BZW14
(x2)
11
12
R4
DTMF
MUTE
100pF
5
UTC TEAI062N
UTC TEA1062AN
From dial and
control circuits
GAR
3.92k
Ω
7
6
C7
MIC+
MIC-
1nF
SLPE GAS1
16
GAS2
3
REG
14
AGC STAB
15
V
E9E
2
8
C6
R8
100pF
R7
390
Ω
R
VA(R16.R14)
R5
3.6k
R6
R9
C8
C3
Ω
Zbal
20
Ω
1nF
4.7 µF
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 RVA(REG to SLPE).
LN
VCC
DTMF
UTC
VDD
DTMF
dialling
circuit
CARDLE
TEA1062AN
MUTE
CONTRAT
M1
VSS DP/FL
VEE
TELEPHONE
LINE
BSN254A
Fig.16
Typical applications of the UTC TEA1062N/TEA1062AN (simplified)
The dashed lines show an optional flash (register recall by timed loop break).
13
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-011,A
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