TDA1220B.pdf

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AM-FM QUALITY RADIO
TDA1220B
AM-FM QUALITY RADIO
The TDA1220B is a monolithic integrated circuit in
a 16-lead dual in-line package.
It is intended for quality receivers produced in large
quantities.
The functions incorporated are:
DIP-16 Plastic
(0.25)
AM SECTION
– Preamplifier and double balanced mixer
– One pin local oscillator
– IF amplifier with internal AGC
– Detector and audio preamplifier
FM SECTION
– IF amplifier and limiter
– Quadrature detector
– Audio preamplifier
The TDA1220B is suitable up to 30MHz AM and for
FM bands (including 450KHz narrow band) and
features:
– Very constant characteristics (3V to 16V)
– High sensitivity and low noise
– Very low tweet
ORDERING NUMBER : TDA 1220BK
– Sensitivity regulation facility (*)
– High recovered audio signal suited for stereo
decoders and radio recorders
– Very simple DC switching of AM-FM
– Low current drain
– AFC facility
(*) Maximum AM sensitivity can be reduced by means of a resistor
(5 to 12K W ) between pin 4 and ground.
BLOCK DIAGRAM
March 1993
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TDA1220B
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V s
Supply voltage
16
V
P tot
Total power dissipation at T amb < 110
°
C
400
mW
T op
Operating temperature
-20 to 85
°
C
T stg , T j
Storage and junction temperature
-55 to 150
°
C
PIN CONNECTION
(Top view)
THERMAL DATA
Symbol
Parameter
Value
Unit
R th-j-amb
Thermal resistance junction-ambient
max
100
°
C/W
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TDA1220B
ELECTRICAL CHARACTERISTICS ( T amb = 25
°
C, V s = 9V unless otherwise specified, refer to test circuit)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
V s
Supply voltage
3
16
V
Id
Drain current
FM
10
15
mA
AM
14
20
mA
AM SECTION (f o = 1 MHz; f m = KHz)
V i
Input sensitivity
S/N = 26 dB
m = 0.3
12
25
m
V
S/N
V i = 10 mV
m = 0.3
45
52
dB
V i
AGC range
D
V out = 10 dB
m = 0.8
94
100
dB
V o
Recovered audio signal
(pin 9)
V i = 1 mV
m = 0.3
80
130
200
mV
d
Distortion
V i = 1 mV
m = 0.3
0.4
1
%
m = 0.8
1.2
%
V H
Max input signal handling
capability
m = 0.8
d < 10%
1
V
R i
Input resistance between
pins 2 and 4
m = 0
7.5
K
W
C i
Input capacitance between
pins 2 and 4
m = 0
18
pF
R o
Output resistance (pin 9)
4.5
7
9.5
K
W
Tweet 2 IF
m = 0.3
Vi = 1 mV
40
dB
Tweet 3 IF
55
dB
FM SECTION (f o = 10.8 MHz; f m = 1 KHz)
V i
Input limiting voltage
-3 dB limiting point
22
36
m
V
AMR
Amplitude modulation
rejection
22.5 KHz
V i = 3 mV
f =
±
m = 0.3
40
50
dB
S/N
Ultimate quieting
D
f =
±
22.5 KHz
V i = 1 mV
55
65
dB
d
Distortion
D
f =
±
75 KHz
V i = 1 mV
0.7
1.5
%
d
Distortion
D
f =
±
22.5 KHz
V i = 1 mV
0.25
0.5
%
d
Distortion (double tuned)
0.1
%
V o
Recovered audio signal
(pin 9)
D
f =
±
22.5 KHz
Vi = 1 mV
80
110
140
mV
R i
Input resistance between
pin 16 and ground
6.5
K
W
Ci
Input capacitance between
pin 16 and ground
14
pF
R o
Output resistance (pin 9)
4.5
7
9.5
K
W
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D
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TDA1220B
Figure 1. Test circuit
Figure 2. PC board and component layout (1:1 scale) of the test circuit
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TDA1220B
Figure 3. Audio output, noise
and tweet levels vs. input
signal (AM section)
Figure 4. Distortion vs. input
signal and modulation index
(AM section)
Figure 5. Audio output vs.
supply voltage (AM section)
Figure 6. Audio output and
noise level vs. input signal (FM
section)
Figure 7. Distortion vs. input
signal (FM section)
Figure 8. Audio output vs.
supply voltage (FM section)
Figure 9. Amplitude modu-
lation rejection vs. input signal
(FM section)
Figure 10. D DC output voltage
(pin. 9) vs. frequency shift (FM
section)
Figure 11. D DC output voltage
(pin 9) vs. ambient
temperature (FM section)
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