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TEA1085A

Features: · Internal supplyoptimum current split-up- low constant current (adjustable) in transmission- nearly all line current available for listening-inadjustable supply voltage· Loudspeaker amplifierdynamic limiter providing low distortion and thehighest possible output powerSE or BTL drive for...

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SeekIC No. : 004517238 Detail

TEA1085A: Features: · Internal supplyoptimum current split-up- low constant current (adjustable) in transmission- nearly all line current available for listening-inadjustable supply voltage· Loudspeaker ampli...

TEA1085A Data Sheet

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Part Number:
TEA1085A
Supply Ability:
5000

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Product Details

Description



Features:

· Internal supply
optimum current split-up
- low constant current (adjustable) in transmission
- nearly all line current available for listening-in
adjustable supply voltage
· Loudspeaker amplifier
dynamic limiter providing low distortion and the
highest possible output power
SE or BTL drive for loudspeaker volume control by
potentiometer and/or logic inputs (e.g.
microcontroller drive)
fixed gain of 35 dB
· Larsen level limiter
low sensitivity for own speech due to 3rd-order filter
and attack delay
adjustable voltage thresholds
· Power down input
· MUTE input
TEA1085/TEA1085A
- clickfree switching between listening-in mode and
standby mode
TEA1085
- toggle function
- start-up in standby condition
TEA1085A
- logic level input


Pinout

Connection Diagram


Specifications

SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
VSUP positive supply voltage
continuous
during switch-on or line interruption
repetitive supply voltage from 1 ms to 5 s



with 12 W current
limiting resistor in
series with supply
-
-
-
12
13.2
28
V
V
V
VSREF
Vn		 supply reference voltage
voltage on all other pins
VSS - 0.5
VSS - 0.5
VSUP + 0.5
VBB + 0.5
V
V
ISUP supply current
TEA1085/TEA1085A
TEA1085T/TEA1085AT

see Fig.12
see Fig.13
-
-
120
120
mA
mA
Ptot total power dissipation
TEA1085/TEA1085A
TEA1085T/TEA1085AT
Tamb = 75 °C;
Tj = 125 °C
-
-
1
666
W
mW
Tamb
Tstg
Tj		 operating ambient temperature range
storage temperature range
junction temperature
-25
-40
-
+75
+125
+125
°C
°C
°C



Description

The TEA1085 and TEA1085A are bipolar ICs which have been designed for use in line-powered telephone sets and provide a listening-in facility for the received line signal via a loudspeaker.

Nearly all the line current can be used for powering the loudspeaker. The circuits incorporate a supply circuit, loudspeaker amplifier dynamic limiter, MUTE circuit, power-down facility and logic inputs for gain setting. The devices also incorporate a Larsen Level Limiter to reduce howling effects.

The ICs are intended for use in conjunction with a transmission circuit of the TEA1060 family.




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