ATMEL TDA1083 User Manual

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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

Features

 Large supply voltage range V
 High AM-Sensitivity

= 3 to 12 V

S

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.

 AFC-connection for VHF-tuner
 AM-FM switching without high frequency voltages

TDA1083

 Limiting threshold voltage V
 Audio output power P0 = 0.7 W

i

= 50 V

Figure 1. Block diagram and pin connections

Applications

 AM-/FM- and audio-amplifier

Absolute Maximum Ratings

Reference points Pin 3 and 11, unless otherwise specified

Parameters Symbol Value Unit
Supply voltage range Pin 13 V
Supply current when using the integrated stabilization

circuit, V
Power dissipation T
Junction temperature T
Storage temperature range T

= 12.5 to 14.3 V Pin 13 I

S

= 65°C P

amb

s

S

tot

j

stg

3 to 12 V

50 mA

600 mW
125 °C

–25 to +125 °C

Thermal Resistance

Parameters Symbol Maximum Unit
Junction ambient R

Rev. A2, 23–Feb–01 1 (8)

thJA

100 K/W

TDA1083

Electrical Characteristics

V

= 9 V, reference points Pin 3 and 11, T

s

Parameters Test Conditions / Pin Symbol Min Typ Max Unit

AF amplifier

AF voltage amplification f = 1 kHz G
Input impedance R
Output power Figures 4 and 5

V

= 5.5 V,

S

R

= 8 , k = 10%

L

AM-IF amplifier, f
DC voltages at AM mode

= 1 MHz, fIF = 455 kHz, f

i

V

= 3 V Pin 10

S

without signal

I

= 42 mA Pin 10

S

(V

= 12.5 to14.3 V)

S

Regulation range V

oAF/VoAF

AF voltage at demodulator
output

FM-IF amplifier, f
DC voltages at FM mode

= 10.7 MHz, f = 22.5 kHz, f

IF

V

= 3 V Pin 10

S

without signal

= 25°C, unless otherwise specified

amb

= 1 kHz, m = 0.3

mod

Pin 12
Pin 13
Pin 16

Pin 12
Pin 13
Pin 16

= –10 dB

Pin 6 V
Pin 8 V

= 1 kHz

mod

Pin 12
Pin 13
Pin 16

V
V
V
V

V
V

V
V

V
V
V
V

P

10
12
13
16

10

12
13
16

oAF

10
12
13
16

v

i

o

300 mW

1.0

3.0

1.25

40 dB

150 k

1.2

3.0

1.2

1.4

3.0

2.0

7.2

V
V
V
V

V
V

5.9

12.5

1.5

i

13.3

14.3

2.0

70 dB

V
V

100 mV

1.0

3.0

1.8

1.2

3.0

1.4

3.0

2.8

V
V
V
V

I

= 42 mA Pin 10

S

(V

= 12.5 to 14.3 V)

S

Pin 12
Pin 13

Pin 16
Limiting threshold (–3 dB) Pin 2 V
AF voltage at demodulator

Pin 8 V
output

Different dc voltages are developed at Pin 16 due to gain

Table 1. Available in following voltage groups:

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.

V

10

1.2

7.2

V

12

V

13

V

16

i

oAF

V

16

R

8

5.9

12.5

2.0

13.3

14.3

3.1

50 V

100 mV

1.4 to 1.7 V 1.7 to 1.9 V 1.9 to 2.1 V
 47 k 33 k

Group 1 2 3

Rev. A2, 23–Feb–012 (8)

V
V

V
V

TDA1083

Figure 2.

Figure 4.

Figure 3.

Rev. A2, 23–Feb–01 3 (8)

Figure 5.