TEA6820T Просмотр технического описания (PDF) - Philips Electronics
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TEA6820T Datasheet PDF : 48 Pages
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Philips Semiconductors
In Car Entertainment (ICE) car radio
Preliminary specification
TEA6820T; TEA6822T
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
AM DETECTOR; notes 8 and 9
V48-4(rms)
V33-34(rms)
AF output level (RMS value)
sensitivity voltage (RMS value)
RL48 > 500 kΩ;
190 240
100 µV ≤ V33-34 ≤ 300 mV
S------N+-----N--- = 26 dB
−
50
290 mV
75 µV
S------N+-----N--- = 46 dB
−
200
400 µV
AM-IF2 minimum input voltage
(RMS value)
THD ≤ 5%; m = 0.8
−
−
100 µV
AM-IF2 maximum input voltage
(RMS value)
THD ≤ 5%; m = 0.8
800 −
−
mV
R33-34
C24-23
Ro48
Co48
S------N+-----N---
IF2 input resistance
IF2 input capacitance
output resistance
output capacitance
signal plus noise-to-noise ratio
1.8 2.0
−
10
27 33
−
−
54 60
2.2 kΩ
15 pF
39 kΩ
10 pF
−
dB
THD
total harmonic distortion
m = 0.8;
−
1.5
300 µV ≤ V33-34 ≤ 200 mV
3.0 %
Notes to the characteristics
1. For typical adjusting range see Figs 10 and 13.
2. For typical curve see Fig.11.
3. The static mute voltage follows the unweighted voltage level as function of FM-IF2 voltage and level adjustment
voltage V38-4. It additionally depends on multi-path level, noise (adjacent channel interferences) and the position of
TSWITCH (pin 3). For typical curve for mute voltage dependence see Fig.12.
4. The mono/stereo blend voltage is generated as a function of FM-IF2 voltage, multi-path level, noise and position of
TSWITCH.
5. The high-cut control voltage is generated as a function of FM-IF2 voltage, multi-path level, noise and position of
TSWITCH.
6. fIF1 = 10.7 MHz; fIF2 = 450 kHz for AM mixer.
7. The AM oscillator signal is generated by division of the 61.5 MHz crystal oscillator. Two divider ratios programmable
by the I2C-bus: divide by 6 (AM-IF1 = 10.7 MHz); divide by 2 (AM-IF1 = 30 MHz).
8. For typical AM level curve see Fig.15.
9. For AM detector; fAMIF2 = 450 kHz; fmod = 400 Hz; m = 30%.
1997 Feb 12
13
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