參數(shù)資料
型號(hào)： TDA9874H
廠商： NXP SEMICONDUCTORS
元件分類： 接收器
英文描述： Digital TV sound demodulator/decoder
中文描述： AM/FM, AUDIO DEMODULATOR, PQFP44
封裝： 14 X 14 MM, 2.20 MM HEIGHT, PLASTIC, SOT-205-1, QFP-44
文件頁數(shù)： 46/56頁
文件大?。?/td> 254K
代理商： TDA9874H
1998 Apr 27
46
Philips Semiconductors
Preliminary specification
Digital TV sound demodulator/decoder
TDA9874H
Z
i
O
UTPUTS
input impedance
50
k
4 mA 3-state output stage (SYSCLK)
V
OL
V
OH
C
L
I
LIZ
LOW-level output voltage
HIGH-level output voltage
load capacitance
3-state leakage current
I
OL
= +2 mA
I
OH
=
2 mA
2.9
0.5
50
±
10
V
V
pF
μ
A
V
i
= 0 to V
DDD
SIF1 and SIF2 analog inputs
V
SIF(p-p)
composite SIF input voltage
range (peak-to-peak value)
input frequency
input resistance
input capacitance
FM deviation
FM deviation full-scale level
FM carrier C/N
c
ratio
note 5
60
700
mV
f
i
R
i
C
i
f
FM
f
FM(FS)
C/N
FM
4
10
±
100
13
7.5
77
9.2
16
11
MHz
k
pF
kHz
kHz
B/G standard; THD < 1%
terrestrial FM; level adjust 0 dB
±
150
N
FM
bandwidth = 6 MHz; white
noise for S/N = 40 dB;
“CCIR468-2” quasi peak
N
c
bandwidth = 6 MHz;
bit error rate = 10
3
;
white noise
C/N
N
NICAM carrier C/N
c
ratio
66
Demodulator performance
V
o(nom)(RMS)
nominal level output voltage
(RMS value)
total harmonic distortion + noise from FM source to any output
note 2
400
500
600
mV
THD + N
with low-pass 30 kHz/3 dB;
V
o
= 1 V (RMS)
from NICAM source to any
output with low-pass
30 kHz/3 dB; V
o
= 1 V (RMS)
SC1 from FM source to any
output; V
o
= 1 V (RMS);
“CCIR468-2” quasi peak;
TIMPOL bit HIGH
SC2 from FM source to any
output; V
o
= 1 V (RMS);
“CCIR468-2” quasi peak;
TIMPOL bit HIGH
NICAM source;
V
o
= 1 V (RMS); “CCIR468-2”
quasi peak
0.3
0.5
%
0.1
0.3
%
S/N
signal-to-noise ratio
61
65
dB
57
60
dB
NICAM in accordance with
“EBU specification” note 1
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
dB
Hz
-------------
dB
N
Hz
----------
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