TEA7532 ST Microelectronics, Inc., TEA7532 Datasheet - Page 3

• Manufacturer Part Number: TEA7532
• Description: Monitor Amplifier With Anti-larsen Function And Adjustment (full Duplex)
• Manufacturer: ST Microelectronics, Inc.

ELECTRICAL CHARACTERISTICS (T
FUNCTIONAL DESCRIPTION
TEA7532 performs the following functions :
The circuit amplifies the incoming signal and feeds
it to the loudspeaker. PG0 and PG1 inputs are used
to set the loudspeaker gain in a range of 32dB to
14dB in 6dB steps.
The TEA7532 inputs (PG0, PG1, ON/OFF) permit
the loudspeaker to be cut-off thus ensuring privacy
of communication.
V
V
Symbol
V
V
I
I
V
V
IH ON/OFF
IL ON/OFF
Z
V
G000
G001
G010
G011
G100
Z
ON/OFF
ON/OFF
V
THD
G
G
V
V
Z
I
I
I
I
IH PG0
IH PG1
IL PG0
IL PG1
G2
MICIN
INPIN
OFFS
Vg
PG0
PG1
PG0
PG1
LSM
G
LS1
ADJ
ATT
IN2
MIC
V
V
Voltage Pin 1
Loudspeaker Amplifier Gain =
Distortion
[V(10) – V(12)]/V2
Microphone Input
Earphone Input
Antilarsen Adjustment Input
Ouput Offset
[V
Input Current ON State
Input Current OFF State
Input Voltage ON State
Input Voltage OFF State
Microphone Gain = V
Voltage Pin 8
Loudspeaker Attenuated
Gain = [V
LS
LS
(10)
Supply
Maximum
– V
(12)
(10)
]
– V
Parameter
(12)
]/V
(7)
(9)
/[V
(5)
– V
V
amb
10
(6)
V
]
9
= 25
V
12
o
I
I
I
I
f = 300Hz to 2kHz,
V
G = G011, (fig. 8)
P
Symetrical at (pins 5-6)
Asymetrical at (pin 6) fig. 9
(fig. 9)
G011 ; (fig. 8)
V
V
V
G011 ; V
G011 ; V
C, I
LS
LS
pin 1
LS
ON/OFF
10
G0
PG1
PG1
MIC
GND
GND
GND
GND
= 2mA (fig. 7)
= 30mA (fig. 7)
= 2mA to 30mA (fig. 7)
V
– V
= P
LS
= 50 A (fig. 7 ; So = closed)
LS
= 10mV
= 0V ; (fig. 8)
= V
- The antilarsen (antiacoustic feedback) system is
- The maximum power available on a 50
Limit values for external components :
R3 min = 5 k (R3 adjust VLS), R7 max = 390 k ,
R6 min = R7/35
R max between pin 5 and 6 = 10k + C min = 10nF.
12
= 30mA unless otherwise specified)
G1
incorporated.
ance loudspeaker is 25mW at 3 volts and 100mW
at 5V.
LS
8
8
Test Conditions
= 0.8V
= 0.6V ; (fig. 10)
= 0.4V ; (fig. 10)
= V
; (fig. 8)
RMS
LS
GND
GND
PG0
V
V
, V
RMS
, f = 2kHz (fig. 10)
X
LS
LS
8
,
= 0.8V (fig. 8)
GND
GND
PG1
V
V
X
LS
LS
Min. Typ. Max. Unit
– 50
– 10
– 10
– 10
22.5
0.48
2.6
1.5
1.5
1.1
2.2
1.5
12
18
24
30
30
20
1
3.15
1.25
– 30
23.5
0.67
– 30
– 5
– 5
– 5
3.0
4.5
2.8
1.2
14
20
26
32
32
30
– 20
1.45
0.45
0.45
0.45
24.5
0.75
– 20
TEA7532
3.4
3.4
5.5
1.4
3.4
16
22
28
34
34
50
2
1
1
1
imped-
mV
dB
dB
dB
dB
dB
dB
k
k
k
dB
dB
dB
%
3/16
V
V
V
V
V
V
V
V
V
V
V
A
A
A
A
A
A