Sharp 28JW-74H, Руководство по обслуживанию

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21
28JW-74H
ICs ADDITIONAL INFORMATION
TDA9885 (IC201)
5 QUICK REFERENCE DATA
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
P
supply voltage notes 1 and 2 4.5 5.0 5.5 V
I
P
supply current 52 63 70 mA
Video part
V
i(VIF)(rms)
VIF input voltage sensitivity
(RMS value)
−
1 dB video at output
−
60 100
µ
V
G
VIF(cr)
VIF gain control range see Fig.7 60 66
−
dB
f
VIF
vision carrier operating frequencies see Table 14
−
33.4
−
MHz
−
33.9
−
MHz
−
38.0
−
MHz
−
38.9
−
MHz
−
45.75
−
MHz
−
58.75
−
MHz
∆
f
VIF
VIF frequency window of digital
acquisition help related to f
VIF
; see Fig.10
− ±
2.3
−
MHz
V
o(video)(p-p)
video signal output voltage
(peak-to-peak value) see Fig.5
normal mode 1.7 2.0 2.3 V
trap bypass mode 0.95 1.10 1.25 V
G
dif
differential gain “CCIR 330”; note 3
B/G standard
− −
5 %
L standard
− −
7 %
ϕ
dif
differential phase “CCIR 330”
−
2 4 deg
B
video(
−
1dB)
−
1 dB video bandwidth trap bypass mode; AC load;
C
L
< 20 pF; R
L
> 1 k
Ω
5 6
−
MHz
B
video(
−
3dB)(trap)
−
3 dB video bandwidth including
sound carrier trap
note 4
f
trap
= 4.5 MHz 3.95 4.05
−
MHz
f
trap
= 5.5 MHz 4.90 5.00
−
MHz
f
trap
= 6.0 MHz 5.40 5.50
−
MHz
f
trap
= 6.5 MHz 5.50 5.95
−
MHz
α
SC1
trap attenuation at first sound
carrier M/N standard 30 36
−
dB
B/G standard 30 36
−
dB
S/N
W(video)
weighted signal-to-noise ratio of
video signal see Fig.11; note 5 56 59
−
dB
PSRR
CVBS
power supply ripple rejection at
pin CVBS f
ripple
= 70 Hz; see Fig.6;
note 6
20 25
−
dB
AFC
stps
AFC control steepness definition:
∆
I
AFC
/
∆
f
VIF
0.85 1.05 1.25
µ
A/kHz
Audio part
V
o(AF)(rms)
AF output voltage (RMS value) 27 kHz FM deviation;
50
µ
s de-emphasis
430 540 650 mV
THD total harmonic distortion of audio
signal FM: 27 kHz FM deviation;
50
µ
s de-emphasis
−
0.15 0.50 %
AM: m = 54%
−
0.5 1.0 %