TDA9874APS Просмотр технического описания (PDF) - Philips Electronics
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TDA9874APS Datasheet PDF : 68 Pages
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Philips Semiconductors
Digital TV sound demodulator/decoder
Preliminary specification
TDA9874A
SYMBOL
PARAMETER
SIF1 and SIF2 analog inputs
VSIF(max)(p-p) maximum composite SIF input
voltage before clipping
(peak-to-peak value)
VSIF(min)(p-p)
minimum composite SIF input
voltage for lower limit of AGC
(peak-to-peak value)
AGC
fi
Ri
Ci
∆fFM
∆fFM(FS)
AGC range
input frequency
input resistance
input capacitance
FM deviation
FM deviation full-scale level
∆fFM(max)
C/NFM
maximum FM deviation in high
deviation mode
FM carrier-to-noise ratio
C/NN
NICAM carrier-to-noise ratio
αct
crosstalk attenuation
SIF1 to SIF2
Demodulator performance
Vo(nom)(rms)
THD + N
nominal level output voltage
(RMS value)
total harmonic distortion plus
noise
CONDITIONS
MIN.
SIF input level adjustment −
0 dB
SIF input level adjustment −
−10 dB
SIF input level adjustment −
0 dB
SIF input level adjustment −
−10 dB
−
4
AGCLEV = 0
10
−
B/G standard; THD < 1% ±100
terrestrial FM; level
adjustment 0 dB;
demodulator filter bandwidth
set to narrow
±150
B/G standard; THD < 1%; ±335
demodulator filter bandwidth
set to extra wide
NFM bandwidth = 6 MHz; −
white noise for S/N = 40 dB;
“CCIR468-2”; quasi peak
NN bandwidth = 6 MHz; bit −
error rate = 10−3; white
noise
fi = 4 to 9.2 MHz
50
note 1
400
from FM source to any
−
output; fi = 1 kHz; bandwidth
20 Hz to 20 kHz;
Vo = 1 V (RMS)
from NICAM source to any −
output; fi = 1 kHz; bandwidth
20 Hz to 20 kHz;
Vo = 1 V (RMS)
TYP.
941
2 976
59
188
24
−
−
7.5
−
−
−
77
66
−
500
0.3
0.1
MAX. UNIT
−
mV
−
mV
−
mV
−
mV
−
dB
9.2
MHz
−
kΩ
11
pF
−
kHz
−
kHz
−
kHz
−
d-H---B-z-
−
d-H---B-z-
−
dB
600
mV
0.5
%
0.3
%
1999 Dec 03
19
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