TEA1062.PDF

(282 KB) Pobierz
11018297 UNPDF
INTEGRATED CIRCUITS
DATA SHEET
TEA1062; TEA1062A
Low voltage transmission circuit
with dialler interface
Product specification
Supersedes data of September 1994
File under Integrated Circuits, IC03
1996 May 10
11018297.013.png
Philips Semiconductors
Product specification
Low voltage transmission circuit
with dialler interface
TEA1062; TEA1062A
FEATURES
GENERAL DESCRIPTION
·
Low DC line voltage; operates down to 1.6 V (excluding
polarity guard)
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.
·
Voltage regulator with adjustable static resistance
·
Provides a supply for external circuits
·
) for
dynamic, magnetic or piezoelectric microphones
W
·
Asymmetrical high-impedance input (32 k W ) for electret
microphones
All statements and values refer to all versions unless
otherwise specified.
·
DTMF signal input with confidence tone
·
Mute input for pulse or DTMF dialling
– TEA1062: active HIGH (M UTE)
– 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
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
V LN
line voltage
I line = 15 mA
3.55
4.0
4.25
V
I line
operating line current
normal operation
11
-
140
mA
with reduced performance
1
-
11
mA
I CC
internal supply current
V CC = 2.8 V
-
0.9
1.35
mA
V CC
supply voltage for peripherals
I line = 15 mA
TEA1062
I p = 1.2 mA; MUTE = HIGH 2.2
2.7
-
V
I p = 0 mA; M UTE = HIGH
-
3.4
-
V
TEA1062A
I p = 1.2 m A; MUT E = LOW 2.2
2.7
-
V
I p = 0 mA; MUTE = LOW
-
3.4
-
V
G v
voltage gain
microphone amplifier
44
-
52
dB
receiving amplifier
20
-
31
dB
T amb
operating ambient temperature
- 25
-
+75
° C
Line loss compensation
D
G v
gain control
-
5.8
-
dB
V exch
exchange supply voltage
36
-
60
V
R exch
exchange feeding bridge resistance
0.4
-
1
k
W
1996 May 10
2
Symmetrical high-impedance inputs (64 k
11018297.014.png 11018297.015.png
Philips Semiconductors
Product specification
Low voltage transmission circuit
with dialler interface
TEA1062; TEA1062A
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
NAME
DESCRIPTION
VERSION
TEA1062
DIP16
plastic dual in-line package; 16 leads (300 mil)
SOT38-1
TEA1062M1
DIP16
plastic dual in-line package; 16 leads (300 mil)
SOT38-4
TEA1062A
DIP16
plastic dual in-line package; 16 leads (300 mil)
SOT38-1
TEA1062T
SO16
plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
TEA1062AT
SO16
plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
BLOCK DIAGRAM
V CC
LN
handbook, full pagewidth
13
1
IR
10
5
GAR
TEA1062A
4
QR
7
MIC
2
GAS1
6
MIC
DTMF
11
dB
3
GAS2
(1)
MUTE
12
SUPPLY AND
REFERENCE
CONTROL
CURRENT
LOW VOLTAGE
CIRCUIT
CURRENT
REFERENCE
9
14
15
8
16
MBA359 - 1
V EE
REG
AGC
STAB
SLPE
(1) Pin 12 is active HIGH (MUTE) for TEA1062.
Fig.1 Block diagram for TEA1062A.
1996 May 10
3
11018297.016.png 11018297.001.png 11018297.002.png 11018297.003.png 11018297.004.png 11018297.005.png 11018297.006.png
Philips Semiconductors
Product specification
Low voltage transmission circuit
with dialler interface
TEA1062; TEA1062A
PINNING
SYMBOL
PIN
DESCRIPTION
LN
1
positive line terminal
GAS1
2
gain adjustment; transmitting
amplifier
GAS2
3
gain adjustment; transmitting
amplifier
handbook, halfpage
LN
1
16
SLPE
QR
4
non-inverting output; receiving
amplifier
GAS1
2
15
AGC
GAS2
3
14
REG
GAR
5
gain adjustment; receiving
amplifier
QR
4
13
V CC
TEA1062A
MIC
-
6
inverting microphone input
GAR
5
12
MUTE
MIC+
7
non-inverting microphone input
MIC
6
11
DTMF
STAB
8
current stabilizer
MIC
7
10
IR
V EE
9
negative line terminal
STAB
8
9
V EE
IR
10
receiving amplifier input
MBA354 - 1
DTMF
11
dual-tone multi-frequency input
MUTE
12
mute input (see note 1)
V CC
13
positive supply decoupling
REG
14
voltage regulator decoupling
AGC
15
automatic gain control input
Fig.2 Pin configuration for TEA1062A.
SLPE
16
slope (DC resistance) adjustment
Note
1. Pin 12 is active HIGH (MUTE) for TEA1062.
1996 May 10
4
11018297.007.png 11018297.008.png
Philips Semiconductors
Product specification
Low voltage transmission circuit
with dialler interface
TEA1062; TEA1062A
FUNCTIONAL DESCRIPTION
Supplies V CC , LN, SLPE, REG and STAB
LN
handbook, halfpage
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.
L eq
R p
R1
V ref
REG
V CC
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 k W 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 -
R9
20 W
C3
4.7 m F
C1
100 m F
V EE
MBA454
L eq = C3
´
R9
´
R p .
R p = 16.2 k
W
.
Fig.3 Equivalent impedance circuit.
I CC -
0.5
´
10 - 3 A)
-
I p }
´
R9
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 cur rent for V CC >
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
W
.
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).
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.
1996 May 10
5
11018297.009.png 11018297.010.png 11018297.011.png 11018297.012.png

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin