INTEGRATED CIRCUITS
DATA SHEET
TEA1062; TEA1062A
Low voltage transmission circuits
with dialler interface
Product specification
Supersedes data of 1996 Dec 04
File under Integrated Circuits, IC03
1997 Sep 03
Philips Semiconductors
Product specification
Low voltage transmission circuits with
dialler interface
FEATURES
•
Low DC line voltage; operates down to 1.6 V (excluding
polarity guard)
•
Voltage regulator with adjustable static resistance
•
Provides a supply for external circuits
•
Symmetrical high-impedance inputs (64 kΩ) for
dynamic, magnetic or piezoelectric microphones
•
Asymmetrical high-impedance input (32 kΩ) for electret
microphones
•
DTMF signal input with confidence tone
•
Mute input for pulse or DTMF dialling
– TEA1062: active HIGH (MUTE)
– TEA1062A: active LOW (MUTE)
•
Receiving amplifier for dynamic, magnetic or
piezoelectric earpieces
•
Large gain setting ranges on microphone and earpiece
amplifiers
•
Line loss compensation (line current dependent) for
microphone and earpiece amplifiers
•
Gain control curve adaptable to exchange supply
•
DC line voltage adjustment facility.
QUICK REFERENCE DATA
SYMBOL
V
LN
I
line
line voltage
operating line current
normal operation
with reduced performance
I
CC
V
CC
internal supply current
supply voltage for peripherals
TEA1062
TEA1062A
G
v
voltage gain
microphone amplifier
receiving amplifier
T
amb
∆G
v
V
exch
R
exch
1997 Sep 03
operating ambient temperature
Line loss compensation
gain control
exchange supply voltage
exchange feeding bridge resistance
2
V
CC
= 2.8 V
I
line
= 15 mA
PARAMETER
CONDITIONS
I
line
= 15 mA
TEA1062; TEA1062A
GENERAL DESCRIPTION
The TEA1062 and TEA1062A are integrated circuits that
perform all speech and line interface functions required in
fully electronic telephone sets. They perform electronic
switching between dialling and speech. The ICs operate at
line voltage down to 1.6 V DC (with reduced performance)
to facilitate the use of more telephone sets connected in
parallel.
All statements and values refer to all versions unless
otherwise specified.
MIN.
3.55
11
1
−
TYP.
4.0
−
−
0.9
2.7
3.4
2.7
3.4
−
−
−
MAX.
4.25
140
11
1.35
−
−
−
−
52
31
+75
−
60
1
UNIT
V
mA
mA
mA
V
V
V
V
dB
dB
°C
I
p
= 1.2 mA; MUTE = HIGH 2.2
I
p
= 0 mA; MUTE = HIGH
I
p
= 0 mA; MUTE = LOW
−
−
44
20
−25
−
36
0.4
I
p
= 1.2 mA; MUTE = LOW 2.2
5.8
−
−
dB
V
kΩ
Philips Semiconductors
Product specification
Low voltage transmission circuits with
dialler interface
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
NAME
TEA1062
TEA1062M1
TEA1062A
TEA1062AM1
TEA1062T
TEA1062AT
BLOCK DIAGRAM
DIP16
DIP16
DIP16
DIP16
SO16
SO16
DESCRIPTION
TEA1062; TEA1062A
VERSION
SOT38-1
SOT38-4 or
SOT38-9
SOT38-1
SOT38-4 or
SOT38-9
SOT109-1
SOT109-1
plastic dual in-line package; 16 leads (300 mil)
plastic dual in-line package; 16 leads (300 mil)
plastic dual in-line package; 16 leads (300 mil)
plastic dual in-line package; 16 leads (300 mil)
plastic small outline package; 16 leads; body width 3.9 mm
plastic small outline package; 16 leads; body width 3.9 mm
VCC
handbook, full pagewidth
LN
1
5
4
GAR
QR
13
IR
10
TEA1062A
MIC
MIC
7
2
6
GAS1
DTMF
(1)
11
12
dB
3
GAS2
MUTE
SUPPLY AND
REFERENCE
CONTROL
CURRENT
LOW VOLTAGE
CIRCUIT
CURRENT
REFERENCE
9
VEE
14
15
8
STAB
16
SLPE
MBA359 - 1
REG AGC
(1) Pin 12 is active HIGH (MUTE) for TEA1062.
Fig.1 Block diagram for TEA1062A.
1997 Sep 03
3
Philips Semiconductors
Product specification
Low voltage transmission circuits with
dialler interface
PINNING
SYMBOL
LN
GAS1
GAS2
QR
GAR
MIC−
MIC+
STAB
V
EE
IR
DTMF
MUTE
V
CC
REG
AGC
SLPE
Note
1. Pin 12 is active HIGH (MUTE) for TEA1062.
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
DESCRIPTION
positive line terminal
gain adjustment; transmitting
amplifier
gain adjustment; transmitting
amplifier
non-inverting output; receiving
amplifier
gain adjustment; receiving
amplifier
inverting microphone input
non-inverting microphone input
current stabilizer
negative line terminal
receiving amplifier input
dual-tone multi-frequency input
mute input (see note 1)
positive supply decoupling
voltage regulator decoupling
automatic gain control input
slope (DC resistance) adjustment
handbook, halfpage
TEA1062; TEA1062A
LN
GAS1
GAS2
QR
GAR
MIC
MIC
STAB
1
2
3
4
TEA1062A
5
6
7
8
MBA354 - 1
16 SLPE
15 AGC
14 REG
13 VCC
12 MUTE
11 DTMF
10 IR
9
VEE
Fig.2 Pin configuration for TEA1062A.
1997 Sep 03
4
Philips Semiconductors
Product specification
Low voltage transmission circuits with
dialler interface
FUNCTIONAL DESCRIPTION
Supplies V
CC
, LN, SLPE, REG and STAB
Power for the IC and its peripheral circuits is usually
obtained from the telephone line. The supply voltage is
derived from the line via a dropping resistor and regulated
by the IC. The supply voltage V
CC
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 V
CC
and V
EE
. The internal voltage
regulator is decoupled by a capacitor between REG and
V
EE
.
The DC current flowing into the set is determined by the
exchange supply voltage V
exch
, the feeding bridge
resistance R
exch
and the DC resistance of the telephone
line R
line
.
The circuit has an internal current stabilizer operating at a
level determined by a 3.6 kΩ resistor connected between
STAB and V
EE
(see Fig.9). When the line current (I
line
) is
more than 0.5 mA greater than the sum of the IC supply
current (I
CC
) and the current drawn by the peripheral
circuitry connected to V
CC
(I
p
) the excess current is
shunted to V
EE
via LN.
The regulated voltage on the line terminal (V
LN
) can be
calculated as:
V
LN
= V
ref
+ I
SLPE
×
R9
V
LN
= V
ref
+ {(I
line
−
I
CC
−
0.5
×
10
−3
A)
−
I
p
}
×
R9
V
ref
is an internally generated temperature compensated
reference voltage of 3.7 V and R9 is an external resistor
connected between SLPE and V
EE
.
In normal use the value of R9 would be 20
Ω.
Changing the value of R9 will also affect microphone gain,
DTMF gain, gain control characteristics, sidetone level,
maximum output swing on LN and the DC characteristics
(especially at the lower voltages).
Under normal conditions, when I
SLPE
>> I
CC
+ 0.5 mA + I
p
,
the static behaviour of the circuit is that of a 3.7 V 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.
handbook, halfpage
TEA1062; TEA1062A
LN
L eq
Rp
R1
V ref
R9
20
Ω
V
EE
REG
VCC
C3
4.7
µF
C1
100
µF
MBA454
L
eq
= C3
×
R9
×
R
p
.
R
p
= 16.2 kΩ.
Fig.3 Equivalent impedance circuit.
At line currents below 9 mA the internal reference voltage
is automatically adjusted to a lower value (typically 1.6 V
at 1 mA). 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 1.6 V. At line
currents below 9 mA the circuit has limited sending and
receiving levels. The internal reference voltage can be
adjusted by means of an external resistor (R
VA
).
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 (I
p
) available from V
CC
for peripheral circuits
depends on the external components used. Fig.10 shows
this current for V
CC
>
2.2 V. If MUTE is LOW (TEA1062) or
MUTE is HIGH (TEA1062A) when the receiving amplifier
is driven, the available current is further reduced. Current
availability can be increased by connecting the supply IC
(TEA1081) in parallel with R1 as shown in Fig.19 and
Fig.20, or by increasing the DC line voltage by means of
an external resistor (R
VA
) connected between REG and
SLPE (Fig.18).
1997 Sep 03
5
