UNISONIC TECHNOLOGIES CO., LTD
TEA1062N/TEA1062AN
LINEAR INTEGRATED CIRCUIT
LOW VOLTAGE TELEPHONE
TRANSMISSION CIRCUIT WITH
DIALLER INTERFACE
SOP-16
DESCRIPTION
The UTC TEA1062N/TEA1062AN is a bipolar integrated circuit
performing all speech and line interface function, required in the
fully electronic 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.
DIP-16
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.
* Symmetrical high-impedance inputs (64kΩ)
for dynamic, magnetic or piezoelectric microphones.
* Asymmetrical high-impedance inputs (32kΩ)
for electrets microphones.
* DTMF signal input with confidence tone.
* 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
ORDERING INFORMATION
Order Number
Lead Free
TEA1062NL-D16-T
TEA1062ANL-D16-T
-
Halogen Free
TEA1062NG-D16-T
TEA1062NG-S16-R
TEA1062ANG-D16-T
TEA1062ANG-S16-R
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
Package
Packing
DIP-16
SOP-16
DIP-16
SOP-16
Tube
Tape Reel
Tube
Tape Reel
1 of 14
QW-R108-011.D
TEA1062N/TEA1062AN
LINEAR INTEGRATED CIRCUIT
MARKING
DIP-16
TEA1062N
TEA1062AN
TEA1062N
TEA1062AN
SOP-16
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www.unisonic.com.tw
2 of 14
QW-R108-011.D
TEA1062N/TEA1062AN
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATIONS
Fig. 1 Pin Configurations
PIN DESCRIPTIONS
PIN NO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PIN NAME
LN
GAS1
GAS2
QR
GAR
MICMIC+
STAB
VEE
IR
DTMF
MUTE/MUTE
Vcc
REG
AGC
SLPE
I/O
I
I
I
O
I
I
I
I
I
I
I
I
I
I
DESCRIPTION
Positive line terminal
Gain adjustment; transmitting amplifier
Gain adjustment; transmitting amplifier
Non-inverting output, receiving amplifier
Gain adjustment; receiving amplifier
Inverting microphone input
On-inverting microphone input
Current stabilizer
Negative line terminal
Receiving amplifier input
Dual-tone multi-frequency input
Mute input; TEA1062N high actived
TEA1062AN low actived
Positive supply decoupling
Voltage regulator decoupling
Automatic gain control input
Slope (DC resistance) adjustment
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3 of 14
QW-R108-011.D
TEA1062N/TEA1062AN
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
VCC
13
LN
1
5 GAR
IR 10
4 QR
2
MIC+ 7
GAS1
MIC- 6
3 GAS2
DTMF 11
dB
MUTE/MUTE 12
SUPPLY AND
REFERENCE
CONTROL
CURRENT
CURRENT
REFERENCE
9
VEE
14
REG
15
AGC
8
STAB
LOW
VOLTAGE
CIRCUIT
16
SLPE
Fig. 2 Block Diagram
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4 of 14
QW-R108-011.D
TEA1062N/TEA1062AN
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
Positive Continuous Line Voltage
VLN
12
V
Repetitive Line Voltage During
VLN(RL)
13.2
V
Switch-On Or Line Interruption
Repetitive Peak Line Voltage for a 1 ms Pulse/5s(R10=13,
VLN(RPL)
28
V
R9=20(see Fig.15))
Line Current (Note1) (R9=20)
ILINE
140
mA
VI(+)
VCC+0.7
V
Voltage on All Other Pins
VI(-)
-0.7
V
Total Power Dissipation (Note2) (R9=20)
PD
640
mW
Junction Temperature
TJ
+125
C
Operating Ambient Temperature Range
TOPR
-25 ~ +75
C
Storage Temperature Range
TSTG
-40 ~ +125
C
Note: 1. Mostly dependent on the maximum required Ta and the voltage between LN and SLPE (see Figs 6 ).
2. Calculated for the maximum ambient temperature specified Ta=75C and a maximum junction temperature
of 125C.
3. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
THERMAL DATA
PARAMETER
Thermal Resistance From Junction to Ambient in Free Air
SYMBOL
θJA
RATING
75
UNIT
°C/W
ELECTRICAL CHARACTERISTICS (ILINE=11~140mA; VEE=0V; f=800Hz; Ta=25C; unless otherwise
specified)
PARAMETER
SYMBOL
SUPPLY; LN AND VCC(PINS 1 AND 13)
Voltage Drop Over Circuit,
Between LN and VEE
VLN
TEST CONDITIONS
MIC inputs open
ILINE =1mA
ILINE =4mA
ILINE =15mA
ILINE =100mA
ILINE =140mA
VLN/T ILINE =15mA
ILINE =15mA, RVA(LN to REG) =68k
ILINE =15mA,
RVA(REG to SLPE) =39k
ICC
VCC=2.8V
Ip=1.2mA; MUTE=HIGH
TEA1062N
ILINE=15mA
Supply Voltage
lp=0mA; MUTE=HIGH
Available for
VCC
Ip=1.2mA; MUTE=LOW
Peripheral Circuitry TEA1062AN
ILINE=15mA
lp=0mA; MUTE=LOW
MICROPHONE INPUTS MIC+ AND MIC- (PINS 6 AND 7)
Input impedance (differential)
Between MIC- and MIC+
∣Zi∣
Input impedance (sigle-ended)
MIC- or MIC+ to VEE
Common Mode Rejection Ratio
CMRR
Voltage Gain MIC+ or MIC- to LN
Gv
ILINE=15mA, R7=68k
Gain Variation with Frequency
Gvf w.r.t.800Hz
at f=300Hz and f=3400Hz
Gain Variation with Temperature
GvT w.r.t.25C, without R6; ILINE =50mA
at -25C and +75C
MIN
TYP
3.55
4.9
1.6
1.9
4.0
5.7
Variation with Temperature
Voltage Drop Over Circuit,
Between LN and VEE with
External Resistor RVA
Supply Current
UNISONIC TECHNOLOGIES CO., LTD
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2.2
2.2
50.5
MAX
UNIT
4.25
6.5
7.5
-0.3
3.5
V
V
V
V
V
mV/K
V
4.5
V
0.9
2.7
3.4
2.7
3.4
1.35
mA
V
V
V
V
64
k
32
k
82
52.0
53.5
dB
dB
±0.2
dB
±0.2
dB
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QW-R108-011.D
TEA1062N/TEA1062AN
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
PARAMETER
SYMBOL
TEST CONDITIONS
DUAL-TONE MULTI-FREQUENCY INPUT DTMF (PIN 11)
∣Zi∣
Input Impedance
ILINE =15mA, R7=68k
MIN
TYP
MAX
20.7
Gv
Gain Variation With Frequency
at f=300Hz and f=3400Hz
Gvf
w.r.t.800Hz
±0.2
dB
Gain Variation With Temperature
at -25C and +75C
GvT
w.r.t.25C, ILINE =50mA
±0.2
dB
RECEIVING AMPLIFIER OUTPUT QR (PIN 4)
∣ZO∣
Output Impedance
Voltage Gain From IR To QR
Gv
Gain Variation With Frequency
Gvf
at f=300Hz and f=3400Hz
Gain Variation With Temperature
GvT
at-25C and +75C
THD=2%
Output Voltage
THD=10%
Noise Output Voltage
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
REDUCTION OF GAIN
TEA1062N
MIC+ Or MIC- To LN
TEA1062AN
Voltage Gain From DTMF To QR
ILINE =15mA; RL(from pin 9 to pin
4 )=300
-8
1.7
29.5
27
0
dB
dB
2.3
0.8
V
V
-69
dBmp
21
k
4
31
dB
32.5
w.r.t.800Hz
±0.2
dB
w.r.t.25C without R6 ILINE =50mA
±0.2
dB
0.22
0.33
V
0.3
0.48
V
15
mV
50
μV
sinwave drive,
RL=150
Ip=0mA, R4=100k;
RL=450
VO(rms) ILINE =15mA
R4=100k
RL=150
ILINE =4mA
ILINE=15mA, R4=100k, IR open –
VNO(rms) circuit psophometrically weighted
RL=300
Gv
-11
0
dB
VIH
VIL
1.5
VCC
0.3
15
V
V
μA
IMUTE
Gv
Gv
8
MUTE=HIGH
MUTE=LOW
R4=100k, RL=300
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25.5
k
Voltage Gain From DTMF to LN
GAIN ADJUSTMENT GAS1 AND GAS2 (PINS 2 AND 3)
Gain Variation Of The Ransmitting
Amplifier By Varying R7 Between
Gv
GAS1 And GAS2
ILINE =15mA, THD=10%
Sending Amplifier Output LN (pin 1)
VLN(rms)
Output Voltage
ILINE =4mA, THD=10%
ILINE =15mA; R7=68k; 200
Noise Output Voltage
VNO(rms) between MIC- and MIC+;
psophometrically weighted
RECEIVING AMPLIFIER INPUT IR (PIN 10)
∣Zi∣
Input Impedance
24
UNIT
70
dB
-19
dB
6 of 14
QW-R108-011.D
TEA1062N/TEA1062AN
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
PARAMETER
SYMBOL
TEST CONDITIONS
AUTOMATIC GAIN CONTROL INPUT AGC ( PIN 15)
Controlling The Gain From lR To
QR And The Gain From MIC+/MICGv
R6=110k, ILINE =70mA
to LN; R6 Between AGC And VEE
Gain Control Range
Highest Line Current For Maximum
Gain
ILINE
Lowest Line Current For Minimum
Gain
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MIN
TYP
MAX
UNIT
-5.8
dB
23
mA
61
mA
7 of 14
QW-R108-011.D
TEA1062N/TEA1062AN
LINEAR INTEGRATED CIRCUIT
FUNCTIONAL DESCRIPTION
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 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 0.5mA 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:
VLN=Vref+ISLPE*R9 or;
VLN=Vref+[( ILINE – ICC - 0.5*10-3A)－IP]*R9
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 20. Changing the value of R9
will also affect microphone gain, DTMF gain, gain control characteristics, side tone level, maximum output swing on
LN and the DC characteristics (especially at the lower voltages). Under normal conditions, when ISLPE≧ICC+0.5mA +
IP, the static behavior 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.
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 of TEA1062N is LOW
(TEA1062AN is HIGH) when the receiving amplifier is driven the available current is further reduced. Current
availability can be increased by connecting the supply IC(1081) in parallel with R1, as shown in Fig.16, or, by
increasing the DC line voltage by means of an external resistor(RVA) connected between REG and SLPE.
MICROPHONE INPUTS(MIC+ AND MIC-) AND GAIN PINS (GAS1 AND GAS2)
The UTC TEA1062N/TEA1062AN has symmetrical inputs. Its input impedance is 64k (2*32k) and its voltage
gain is typically 52 dB (when R7=68k. see Fig.13). Dynamic, magnetic, piezoelectric or electret (with built-in FET
source followers) can be used. 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/MUTE)
A LOW (UTC TEA1062N is HIGH) level at UTC TEA1062AN MUTE enables DTMF input and inhibited 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 clicks 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/MUTE input.
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=68k) 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).
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8 of 14
QW-R108-011.D
TEA1062N/TEA1062AN
LINEAR INTEGRATED CIRCUIT
FUNCTIONAL DESCRIPTION(Cont.)
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=100k). 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 subtracting 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 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.
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 176/km and average attenuation of 1.2dB/km. Resistor R6 should be chosen
in accordance 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.
SIDE-TONE SUPPRESSION
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:
If fixed values are chosen for R1, R2, R3 and R9 then condition(a) will always be fulfilled when ︱R8//ZBAL︱
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