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TEA6821T Datasheet, PDF (2/47 Pages) NXP Semiconductors – ICE car radio | |||
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Philips Semiconductors
ICE car radio
Preliminary speciï¬cation
TEA6821T
FEATURES
General
⢠FM mixer for conversion from FM IF1 = 72.2 MHz to FM
IF2 = 10.7 MHz
⢠AM mixer for conversion from AM IF1 = 10.7 MHz to AM
IF2 = 450 kHz
⢠FM IF gain stage
⢠Crystal oscillator providing mixer frequencies and
references for IF count and stereo decoder
⢠FM quadrature demodulator with automatic centre
frequency adjust and THD compensation
⢠Level and multipath and noise detectors
⢠Soft mute
⢠Stereo noise cancelling and variable de-emphasis
⢠PLL stereo decoder
⢠Noise blanker
⢠AM IF amplifier and demodulator
⢠I2C-bus transceiver
⢠IF count for AM and FM
⢠Reference frequency generation for PLL synthesizer
⢠Reduced external components
⢠SW applicable.
Stereo decoder
⢠Adjustment-free PLL-VCO
⢠Pilot depending mono/stereo switching
⢠Analog control of mono/stereo blend
⢠Adjacent channel noise suppression (114 kHz)
⢠Pilot canceller
⢠Analog control of de-emphasis
⢠Integrated low-pass filters for 190 kHz adjacent channel
interferences and signal delay for interference
absorption circuit.
GENERAL DESCRIPTION
The TEA6821T together with the TEA6810T / TEA6811T
forms an AM/FM electronic tuned car radio in a double
conversion receiver concept for European, American and
Japanese frequency range.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Vs1
Vs1
Is1
Is1
Vs2
Vs2
Is2
Is2
S+N/N
THD
S+N/N
THD
α
Tamb
supply voltage 1 (pins 56 and 28)
operating range
supply current 1 FM
supply current 1 AM
supply voltage 2 (pin 5)
operating range
supply current 2 FM
supply current 2 AM
signal-to-noise AM
distortion AM
signal-to-noise FM
distortion FM
channel separation (adjusted)
operating ambient temperature
note 1
7
8.5
8.1 8.5
â
28
â
24
note 1
4.5 5.0
4.75 5.0
â
31
â
28
m = 0.3
â
57
â
1
âf = 22.5 kHz at pins 43 and 47 66
72
âf = 75 kHz
â
0.1
40
â
â40 â
10
V
8.9 V
â
mA
â
mA
5.5 V
5.25 V
â
mA
â
mA
â
dB
2
%
â
dB
0.35 %
â
dB
+85 °C
Note to the quick reference data
1. IC is functional, specified parameters may deviate from limits which are valid for operating range.
September 1993
2
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