TEA1113 Philips Semiconductors, TEA1113 Datasheet - Page 4

• Manufacturer Part Number: TEA1113
• Description: Low voltage versatile telephone transmission circuit with dialler interface
• Manufacturer: Philips Semiconductors

Philips Semiconductors
PINNING
FUNCTIONAL DESCRIPTION
All data given in this chapter are typical values, except
when otherwise specified.
Supply (pins LN, SLPE, V
The supply for the TEA1113 and its peripherals is obtained
from the telephone line.
The ICs generate a stabilized reference voltage (V
between pins LN and SLPE. This reference voltage is
equal to 3.7 V, is temperature compensated and can be
adjusted by means of an external resistor (R
increased by connecting the R
pins REG and SLPE, or decreased by connecting the R
resistor between pins REG and LN. The voltage at
pin REG is used by the internal regulator to generate the
stabilized reference voltage and is decoupled by a
capacitor (C
capacitor, converted into an equivalent inductance (see
Section “Set impedance”), realizes the set impedance
conversion from its DC value (R
1997 Mar 27
LN
SLPE
I
REG
GAS
DLS/
MMUTE
DTMF
MUTE
IR
AGC
MIC
MIC
V
QR
GAR
V
SYMBOL
LED
EE
CC
Low voltage versatile telephone
transmission circuit with dialler interface
REG
PIN
10
12
13
14
15
16
11
1
2
3
4
5
6
7
8
9
) which is connected to V
positive line terminal
slope (DC resistance) adjustment
available output current to drive an
LED
line voltage regulator decoupling
sending gain adjustment
dynamic limiter timing adjustment
and microphone mute input
dual-tone multi-frequency input
mute input to select speech or
dialling mode (active LOW)
receiving amplifier input
automatic gain control - line loss
compensation
inverting microphone amplifier
input
non-inverting microphone amplifier
input
negative line terminal
receiving amplifier output
receive gain adjustment
supply voltage for speech circuit
and peripherals
CC
and REG)
VA
DESCRIPTION
SLPE
resistor between
) to its AC value
EE
. This
VA
). It can be
ref
)
VA
4
(R
SLPE is proportional to the line current. Figure 3 illustrates
the supply configuration.
The IC regulates the line voltage at the pin LN, and it can
be calculated as follows:
handbook, halfpage
I
I
I
I*: current consumed between LN and V
I
I
via LN.
CC
V
I
line
CC
p
LED
sh
SLPE
: supply current for peripheral circuits
LN
: the excess line current shunted to SLPE (and V
: current consumption of the IC
in the audio-frequency range). The voltage at pin
: line current
: supply current for the LED component
=
DLS/MMUTE
=
V
ref
I
line
DTMF
MUTE
SLPE
+
I LED
REG
GAS
–
R
LN
Fig.2 Pin configuration.
I
SLPE
CC
1
2
3
4
5
6
7
8
–
I
p
TEA1113
I
I –
SLPE
MBG015
=
I
LED
16
15
14
13
12
11
10
9
Product specification
+
V CC
GAR
QR
V EE
MIC
MIC
AGC
IR
I
sh
TEA1113
EE
EE
)