TDA1083
Rev. A2, 23Feb01
1 (8)
One Chip AM/FM Radio with Audio Power Amplifier
Description
The integrated circuit TDA1083 includes, with exception
of the FM front end, a complete AM-/FM-radio-circuit
with audio power amplifier. An internal Z-diode
stabilizes the supply voltage at V
S
[ 13 V, which allows
with the aid of a resistor and a rectifier, the circuit to be
driven by a higher external supply voltage.
Features
D Large supply voltage range V
S
= 3 to 12 V
D High AM-Sensitivity
D Limiting threshold voltage V
i
=
50
m
V
D Audio output power P
0
= 0.7 W
D AFC-connection for VHF-tuner
D AM-FM switching without high frequency voltages
Applications
D AM-/FM- and audio-amplifier
Figure 1. Block diagram and pin connections
Absolute Maximum Ratings
Reference points Pin 3 and 11, unless otherwise specified
Parameters
Symbol
Value
Unit
Supply voltage range
Pin 13
V
s
3 to 12
V
Supply current when using the integrated stabilization
circuit, V
S
= 12.5 to 14.3 V
Pin 13
I
S
50
mA
Power dissipation
T
amb
= 65
C
P
tot
600
mW
Junction temperature
T
j
125
C
Storage temperature range
T
stg
25 to +125
C
Thermal Resistance
Parameters
Symbol
Maximum
Unit
Junction ambient
R
thJA
100
K/W
TDA1083
Rev. A2, 23Feb01
2 (8)
Electrical Characteristics
V
s
=
9 V, reference points Pin 3 and 11, T
amb
=
25
C, unless otherwise specified
Parameters
Test Conditions / Pin
Symbol
Min
Typ
Max
Unit
AF amplifier
AF voltage amplification
f = 1 kHz
G
v
40
dB
Input impedance
R
i
150
k
W
Output power
Figures 4 and 5
V
S
= 5.5 V,
R
L
= 8
W, k = 10%
P
o
300
mW
AM-IF amplifier, f
i
= 1 MHz, f
IF
= 455 kHz, f
mod
= 1 kHz, m = 0.3
DC voltages at AM mode
without signal
V
S
= 3 V
Pin 10
Pin 12
Pin 13
Pin 16
I
S
= 42 mA
Pin 10
(V
S
= 12.5 to14.3 V)
Pin 12
Pin 13
Pin 16
V
10
V
12
V
13
V
16
V
10
V
12
V
13
V
16
1.0
3.0
1.25
5.9
12.5
1.5
1.2
3.0
1.2
13.3
1.4
3.0
2.0
7.2
14.3
2.0
V
V
V
V
V
V
V
V
Regulation range
V
oAF
/V
oAF
= 10 dB
Pin 6
DV
i
70
dB
AF voltage at demodulator
output
Pin 8
V
oAF
100
mV
FM-IF amplifier, f
IF
= 10.7 MHz,
Df = "22.5 kHz, f
mod
= 1 kHz
DC voltages at FM mode
without signal
V
S
= 3 V
Pin 10
Pin 12
Pin 13
Pin 16
I
S
= 42 mA
Pin 10
(V
S
= 12.5 to 14.3 V)
Pin 12
Pin 13
Pin 16
V
10
V
12
V
13
V
16
V
10
V
12
V
13
V
16
1.0
3.0
1.8
5.9
12.5
2.0
1.2
3.0
1.2
13.3
1.4
3.0
2.8
7.2
14.3
3.1
V
V
V
V
V
V
V
V
Limiting threshold (3 dB)
Pin 2
V
i
50
mV
AF voltage at demodulator
output
Pin 8
V
oAF
100
mV
Different dc voltages are developed at Pin 16 due to gain
spread of AM-IF-amplifier. To determine the value of
parallel resistance R
8
, at the output of the demodulator
Pin 8 for V
S
= 9 V, AM mode without signal, dc voltage
should be selected at Pin 16.
Table 1. Available in following voltage groups:
V
16
1.4 to 1.7 V 1.7 to 1.9 V 1.9 to 2.1 V
R
8
1
47 k
W
33 k
W
Group
1
2
3
TDA1083
Rev. A2, 23Feb01
3 (8)
Figure 2.
Figure 3.
Figure 4.
Figure 5.
TDA1083
Rev. A2, 23Feb01
4 (8)
Figure 6.
Figure 7.
TDA1083
Rev. A2, 23Feb01
5 (8)
Figure 8.
Components in Figure 9
L
1
=
4
Wdg
0.45 CuL, threaded core 7.5x3 material: Fi 01 U8 (Vogt GmbH)
L
2
=
5
Wdg
0.45 CuL
L
3
=
5
Wdg
0.45 CuL, air core
3.5 mm
L
4
=
3+3
Wdg
0.45 CuL, air core
2.7 mm
L
5
=
12
Wdg
0.25 CuL, Pin 31, filter kit 154 AN(C) or 154ANS7 A6363A0 (TOKO, Componex)
L
6
=
2
Wdg
0.25 CuL, Pin 46
L
7
=
7
Wdg
0.25 CuL, Pin 63, filter kit 154AN(C) or 154EES7 A6392FA (TOKO, Componex)
L
8
=
7
Wdg
0.16 CuL, Pin 14, filter kit 154AN(C) or 154EES7 A6391ABM (TOKO, Componex)
L
9
=
5
Wdg
0.16 CuL, Pin 26
L
10
=
96
Wdg
0.25 CuLs, ferrite aerial
8x130 mm, type 0310392103606, (Draloric)
L
11
=
6
Wdg
0.25 CuLs
L
12
=
78
Wdg
0.09 CuL, Pin 34, filter kit RBR or RWOS6A7609AAU (TOKO, Componex)
L
13
=
7
Wdg
0.09 CuL, Pin 21
L
14
=
18
Wdg
0.09 CuL, Pin 34, filter kit RHN(C) or RHCS1A7607AQH (TOKO, Componex)
L
15
=
46+100
Wdg
0.09 CuL, Pin 621
L
16
=
72+72
Wdg
0.09 Cul Pin 34/61, filter kit RHN(C) or RHNS1A7608AZP (TOKO, Componex)
455 kHz
=
Ceramic filter LBF 6 (Componex) or CFU 445 H (Stettner)
10.7 MHz
=
Ceramic filter 10.7 MF18 (Componex) or SFE 10.7 MA (Stettner)
D
r1
, D
r3
=
Ferrit bead on the transistor terminal
D
r2
=
16
Wdg
0.25 CuL,
2 air core
D
r4
=
6
Wdg
0.15 CuL,
2.1x3 mm ferrit bead
C
6
=C
14
=
4.5 to 20 pF, variable capacitor type CY222124RT02 (TOKO, Componex)
C
19
=
5 to 80 pF
C
21
=
5 to 140 pF
R
8
=
According to gain groups
1, 47 kW or 33 kW
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