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:
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
DIP-16 Plastic
(0.25)
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 12KΩ) between pin 4 and ground.
BLOCK DIAGRAM
March 1993
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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. ∆ DC output voltage
(pin. 9) vs. frequency shift (FM
section)
Figure 11. ∆ DC output voltage
(pin 9) vs. ambient
temperature (FM section)
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