volume controller. TEA1111A Datasheet

TEA1111A controller. Datasheet pdf. Equivalent


Part TEA1111A
Description earpiece volume controller
Feature INTEGRATED CIRCUITS DATA SHEET TEA1111A Speech circuit with dialler interface, regulated supply an.
Manufacture NXP
Datasheet
Download TEA1111A Datasheet


INTEGRATED CIRCUITS DATA SHEET TEA1111A Speech circuit wit TEA1111A Datasheet
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TEA1111A
INTEGRATED CIRCUITS
DATA SHEET
TEA1111A
Speech circuit with dialler interface,
regulated supply and earpiece
volume control
Product specification
Supersedes data of 1999 Sep 28
File under Integrated Circuits, IC03
1999 Nov 22



TEA1111A
Philips Semiconductors
Speech circuit with dialler interface, regulated
supply and earpiece volume control
Product specification
TEA1111A
FEATURES
Low DC line voltage; operates down to 1.5 V (excluding
voltage drop across external polarity guard)
Line voltage regulator with adjustable DC voltage
3.25 V regulated strong supply point for peripheral
circuits compatible with:
– Speech mode
– Ringer mode
– Trickle mode.
Transmit stage with:
– Microphone amplifier with symmetrical high
impedance inputs
– DTMF amplifier with confidence tone on earpiece.
Receive stage with:
– Earpiece amplifier with adjustable gain and volume
control.
MUTE input for pulse or DTMF dialling
AGC line loss compensation for microphone and
earpiece
LED control output.
APPLICATIONS
Line powered telephone sets with LCD module
Cordless telephones
Fax machines
Answering machines.
GENERAL DESCRIPTION
The TEA1111A is a bipolar integrated circuit that performs
all speech and line interface functions required in fully
electronic telephone sets. It performs electronic switching
between speech and dialling. The IC operates at a line
voltage down to 1.5 V DC (with reduced performance) to
facilitate the use of telephone sets connected in parallel.
When the line current is high enough, a fixed amount of
current is derived from the LN pin in order to create a
strong supply point at pin VDD. The voltage at pin VDD is
regulated to 3.25 V to supply peripherals such as dialler,
LCD module and microcontroller.
QUICK REFERENCE DATA
Iline = 15 mA; VEE = 0 V; VVCI = 0 V; RSLPE = 20 ; AGC pin connected to VEE; Zline = 600 ; f = 1 kHz; measured
according to test circuits given in Figs 14, 15 and 16; Tamb = 25 °C; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Iline line current operating range
VLN DC line voltage
ICC internal current consumption
VCC supply voltage for internal circuitry (unregulated)
VDD regulated supply voltage for peripherals
speech mode
ringer mode
IDD
Gv(TX)
Gv(QR)
Gv(QR)
Gv(trx)
Gv(trx)(m)
available supply current for peripherals
typical voltage gain for microphone amplifier
typical voltage gain for earpiece amplifier
volume control range for earpiece amplifier
gain control range for microphone and earpiece
amplifiers with respect to Iline = 15 mA
gain reduction for microphone and earpiece
amplifiers
normal operation
with reduced
performance
VCC = 3.3 V
IP = 0 mA
IDD = 3 mA
IDD = 75 mA
VMIC = 4 mV (RMS)
VIR = 4 mV (RMS)
Iline = 85 mA
MUTE = LOW
11
1
140 mA
11 mA
3.7 4.0 4.3 V
1.15 1.4 mA
3.3 V
2.95 3.25 3.55 V
3.0 3.3 3.6 V
− − −3 mA
43.2 44.2 45.2 dB
26.4 27.4 28.4 dB
0 14.5 dB
6.0 dB
80 dB
1999 Nov 22
2







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