TDA9845 데이터 시트보기 (PDF) - Philips Electronics
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TDA9845 Datasheet PDF : 20 Pages
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Philips Semiconductors
TV and VTR stereo/dual sound processor
with digital identification
Preliminary specification
TDA9845
SYMBOL
PARAMETER
CONDITIONS
MIN.
Pilot processing
Vi pil(rms) pilot input voltage level at
pin 6 (RMS value)
Ri pil
pilot input resistance
Ci pil
pilot input capacitance
m
modulation depth
∆fpil
pilot PLL pull-in frequency
range (referenced to
fpil = 54.6875 kHz)
tpil
fLP
R4
V4(rms)
QL
tacqui AGC
pilot PLL pull-in time
low-pass frequency
response
low-pass output resistance
identification threshold
voltage (RMS value)
loaded quality factor of
resonance circuit
loaded quality factor of
resonance circuit with fixed
coil
AGC acquisition time
unmodulated
5
AM
fω = 9.988 MHz
lower side
upper side
fω = 10.008 MHz
lower side
upper side
fω = 10.028 MHz
lower side
upper side
−3 dB
500
−
25
−405
192
−296
302
−188
411
0
450
18.75
−
HIGH sensitivity;
40
see Fig.1
sensitivity loss 2 to 3 dB; −
see Fig.2
Vi pil(rms) switched from −
0 to 100 mV RMS value
Identification (internal functions)
Vi tuner
identification voltage
sensitivity
C/N
pilot carrier-to-noise ratio for
start of identification
H
hysteresis
fdet
pull-in frequency range of
identification PLL
(referenced to
fdet STEREO = 117.48 Hz and
fdet DUAL = 274.12 Hz)
note 4
note 5
note 4
lower side
STEREO
DUAL
upper side
STEREO
DUAL
−
−
−
−0.63
−0.69
0.63
0.69
TYP.
−
1000
−
50
−
−
−
−
−
−
−
600
25
−
−
12
−
28
33
−
−
−
−
−
MAX.
UNIT
100
mV
−
kΩ
3
pF
75
%
−405
Hz
192
Hz
−296
Hz
302
Hz
−188
Hz
411
Hz
1.7
ms
750
Hz
31.25
kΩ
70
mV
50
−
0.1
s
−
−
2
−0.63
−0.69
0.63
0.69
dBµV
dB/Hz
dB
Hz
Hz
Hz
Hz
1995 Mar 20
10
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