TDA1083
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 VS [ 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 VS = 3 to 12 V |
D |
AFC-connection for VHF-tuner |
|
D |
High AM-Sensitivity |
D AM-FM switching without high frequency voltages |
|
D |
Limiting threshold voltage Vi = 50 mV |
Applications |
|
D |
Audio output power P0 = 0.7 W |
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 |
Vs |
3 to 12 |
V |
Supply current when using the integrated stabilization |
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|
|
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circuit, VS = 12.5 to 14.3 V |
Pin 13 |
IS |
50 |
mA |
Power dissipation |
Tamb = 65°C |
Ptot |
600 |
mW |
Junction temperature |
|
Tj |
125 |
°C |
Storage temperature range |
|
Tstg |
±25 to +125 |
°C |
Thermal Resistance |
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Parameters |
|
Symbol |
Maximum |
Unit |
Junction ambient |
|
RthJA |
100 |
K/W |
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TELEFUNKEN Semiconductors |
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1 (10) |
Rev. A1, 17-Jun-96 |
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TDA1083
Electrical Characteristics
Vs = 9 V, reference points Pin 3 and 11, Tamb = 25°C, unless otherwise specified
Parameters |
Test Conditions / Pin |
Symbol |
Min |
Typ |
Max |
Unit |
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AF amplifier |
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AF voltage amplification |
f = 1 kHz |
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Gv |
|
40 |
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dB |
Input impedance |
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Ri |
|
150 |
|
kW |
Output power |
Figures 4 and 5 |
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Po |
300 |
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|
mW |
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VS = 5.5 V, |
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RL = 8 W, k = 10% |
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AM-IF amplifier, fi = 1 MHz, fIF = 455 kHz, fmod = 1 kHz, m = 0.3 |
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DC voltages at AM mode |
VS = 3 V |
Pin |
10 |
V10 |
|
1.2 |
|
V |
without signal |
|
Pin |
12 |
V12 |
1.0 |
|
1.4 |
V |
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Pin |
13 |
V13 |
3.0 |
3.0 |
3.0 |
V |
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Pin |
16 |
V16 |
1.25 |
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2.0 |
V |
|
IS = 42 mA |
Pin 10 |
V10 |
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1.2 |
|
V |
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(VS = 12.5 to14.3 V) |
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5.9 |
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7.2 |
V |
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Pin |
12 |
V12 |
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|
V |
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Pin |
13 |
V13 |
12.5 |
13.3 |
14.3 |
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Pin |
16 |
V16 |
1.5 |
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2.0 |
V |
Regulation range |
VoAF/VoAF = ±10 dB |
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Pin |
6 |
DVi |
|
70 |
|
dB |
AF voltage at demodulator |
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Pin |
8 |
VoAF |
|
100 |
|
mV |
output |
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FM-IF amplifier, fIF = 10.7 MHz, Df = "22.5 kHz, fmod = 1 kHz |
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DC voltages at FM mode |
VS = 3 V |
Pin |
10 |
V10 |
|
1.2 |
|
V |
without signal |
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Pin |
12 |
V12 |
1.0 |
|
1.4 |
V |
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Pin |
13 |
V13 |
3.0 |
3.0 |
3.0 |
V |
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Pin |
16 |
V16 |
1.8 |
|
2.8 |
V |
|
IS = 42 mA |
Pin 10 |
V10 |
|
1.2 |
|
V |
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(VS = 12.5 to 14.3 V) |
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|
5.9 |
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7.2 |
V |
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Pin |
12 |
V12 |
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V |
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Pin |
13 |
V13 |
12.5 |
13.3 |
14.3 |
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Pin |
16 |
V16 |
2.0 |
|
3.1 |
V |
Limiting threshold (±3 dB) |
|
Pin |
2 |
Vi |
|
50 |
|
mV |
AF voltage at demodulator |
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Pin |
8 |
VoAF |
|
100 |
|
mV |
output |
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2 (10) |
TELEFUNKEN Semiconductors |
|
Rev. A1, 17-Jun-96 |
TDA1083
Different dc voltages are developed at Pin 16 due to gain spread of AM-IF-amplifier. To determine the value of parallel resistance R8, at the output of the demodulator Pin 8 for VS = 9 V, AM mode without signal, dc voltage should be selected at Pin 16.
Figure 2.
Table 1. Available in following voltage groups:
V16 |
1.4 to 1.7 V |
1.7 to 1.9 V |
1.9 to 2.1 V |
R8 |
1 |
47 kW |
33 kW |
Group |
1 |
2 |
3 |
Figure 3.
TELEFUNKEN Semiconductors |
3 (10) |
Rev. A1, 17-Jun-96 |
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