TEA1113 查看數據表（PDF） - Philips Electronics

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TEA1113

Low voltage versatile telephone transmission circuit with dialler interface

Philips Electronics 

Philips Semiconductors

Low voltage versatile telephone

transmission circuit with dialler interface

Product specification

TEA1113

PINNING

SYMBOL PIN

DESCRIPTION

LN

1 positive line terminal

SLPE

2 slope (DC resistance) adjustment

ILED

3 available output current to drive an

LED

REG

4 line voltage regulator decoupling

GAS

5 sending gain adjustment

DLS/

MMUTE

6 dynamic limiter timing adjustment

and microphone mute input

DTMF

7 dual-tone multi-frequency input

MUTE

8 mute input to select speech or

dialling mode (active LOW)

IR

9 receiving amplifier input

AGC

10 automatic gain control - line loss

compensation

MIC−

11 inverting microphone amplifier

input

MIC+

12 non-inverting microphone amplifier

input

VEE

13 negative line terminal

QR

14 receiving amplifier output

GAR

15 receive gain adjustment

VCC

16 supply voltage for speech circuit

and peripherals

handbook, halfpage

LN 1

SLPE 2

16 VCC

15 GAR

ILED 3

REG 4

GAS 5

14 QR

13 VEE

TEA1113

12 MIC+

DLS/MMUTE 6

11 MIC−

DTMF 7

10 AGC

MUTE 8

9 IR

MBG015

Fig.2 Pin configuration.

FUNCTIONAL DESCRIPTION

All data given in this chapter are typical values, except

when otherwise specified.

Supply (pins LN, SLPE, VCC and REG)

The supply for the TEA1113 and its peripherals is obtained

from the telephone line.

The ICs generate a stabilized reference voltage (Vref)

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 (RVA). It can be

increased by connecting the RVA resistor between

pins REG and SLPE, or decreased by connecting the RVA

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 (CREG) which is connected to VEE. This

capacitor, converted into an equivalent inductance (see

Section “Set impedance”), realizes the set impedance

conversion from its DC value (RSLPE) to its AC value

(RCC in the audio-frequency range). The voltage at pin

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:

VLN = Vref + RSLPE × ISLPE

ISLPE

=

Iline – ICC – Ip – I∗

=

ILED

+

I

sh

Iline: line current

ICC: current consumption of the IC

Ip: supply current for peripheral circuits

I*: current consumed between LN and VEE

ILED: supply current for the LED component

Ish: the excess line current shunted to SLPE (and VEE)

via LN.

1997 Mar 27

4

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