TEA7540 ST Microelectronics, Inc., TEA7540 Datasheet - Page 6

• Manufacturer Part Number: TEA7540
• Description: Handsfree Controller
• Manufacturer: ST Microelectronics, Inc.

TEA7540
ELECTRICAL CHARACTERISTICS (Refer to test circuits, T
specified).
6/13
ATE-IDLE Mode: Noise Tx, Rx Comp.
ATE-active Mode: Active
Symbol
Symbol
SUPPLY SECTION
TRANSMIT SECTION
COMPRESSOR
PEAK DETECTOR
NOISE MEMORIZAT ION
ATTENUATOR
RECEIVE SECTION
COMPRESSOR
V
G
G
G
G
V
V
ATE-
Rine
R
V
V
I
I
R
I
I
T
I
R
micout
R
C
V
cce1
cce2
V1
C
V
1max
2max
ccr1
ccr2
I
cce1
cce2
ce2
1min
2min
inp d
ccr1
ccr2
C
dh
ina
inr
dh
R
O
R
+
Supply Voltage
Current Consumption
Compressor input impedance
Compressor Range
Maximum Gain
Minimum Gain
Output Voltage
Transmit Distortion
Compressor dacay time current
Compressor rise time current
Voltage drop PIN8
V
Input impedance PIN11
Rise time current
Max voltage drop on pin 9
Input impedance PIN4
Attenuation=
20log(Voute/Vatte)
Mode: Inactive Tx, Rx
Comp. Max Gain
Max Gain
Input impedance
Compressor Range
Maximum Gain
Minimum Gain
Compressor output voltage
Receive Distortion
Compressor decay time
current
Compressor rise time current
Voltage drop PIN20
Vccr = Vref - Vpin20
cce
= Vref - Vpin8
Parameter
Parameter
Vcs = 0
Handsfree mode
Vcs= N.C.
Monitoring mode
PIN13
PIN12 compressing range
Increasing gain
Decreasing gain
G1max
G1min
Rpin24 = 11K
Rpin24 = 15K
Rpin24 = 11K
Rpin24 = 11K
PIN15
PIN16 compressing range
Increasing gain
Decreasing gain
G2max
G2min
Test Condition
Test Condition
amb
= 25 C; V
Min.
40.5
24.0
35.5
15.0
Min.
160
175
160
175
2.5
7.5
1.0
7.5
7.5
7.5
1.0
65
16
33
65
0
+
= 3V; f = 1KHz unless otherwise
Typ.
Typ.
10.0
16.5
41.5
25.0
10.0
10.0
20.5
36.5
16.0
1.25
1.25
200
225
200
225
2.1
1.1
1.5
85
20
36
10
46
58
23
85
0
0
Max.
Max.
14.5
42.5
26.0
14.5
14.5
14.5
37.5
17.0
240
105
275
240
105
275
7.0
3.0
1.5
3.0
1.5
3.0
1.5
20
24
45
20
3
mVpp
mVpp
Unit
Unit
mA
mA
K
mV
mV
K
mV
K
K
mV
mV
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
%
%
V
A
A
A
A
A
Fig.
Fig.
10
11
1
1
1
2
3
4
4
5
6
2
3
1
7
8
1
9
1
2
3
4
4
5
6
2
3