TDA9725 データシートの表示（PDF） - Philips Electronics
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TDA9725 Datasheet PDF : 44 Pages
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Philips Semiconductors
Y/C automatic adjustment processor
(VHS standard)
Product specification
TDA9725
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Negative feedback input of main emphasis (pin 4; open-base) and main emphasis
output/white-clip/modulator/SQPB selector (pin 5)
FEEDBACK LOOP CLOSED (PIN 4 CONNECTED TO PIN 5; MAIN EMPHASIS OFF)
VSY
DC voltage level
sync tip
−
1.9
−
V
VoREC(p-p)
record output voltage level; video/sync = 7/3;
standard output level
∆VCC = ±0.25 V;
(peak-to-peak value)
Tamb = −10 to +70 °C
450
500
550
mV
tFRAMEDET time for correcting carrier HIGH during half picture 1; note 1 −
−
200
ms
interleave relationship to
half picture
NON-LINEAR EMPHASIS/DETAIL ENHANCER; notes 2 and 3
RD1
RD2
RS1
RS1
RL1
RL2
RL3
response D1
response D2
response S1
response S2
response L1
response L2
response L3
−20 dB; fi = 500 kHz; SP; NORM 1.7
2.7
3.7
dB
−20 dB; fi = 2 MHz; SP; NORM 6.0
7.5
9.0
dB
−20 dB; fi = 500 kHz; SP; EDIT 1.0
1.7
2.4
dB
−20 dB; fi = 2 MHz; SP; EDIT
4.5
5.5
6.5
dB
−20 dB; fi = 500 kHz; LP
3.1
4.4
5.7
dB
−20 dB; fi = 2 MHz; LP
7.0
9.0
11
dB
0 dB; fi = 2 MHz; LP
1.6
2.3
3.0
dB
VERTICAL EMPHASIS
PL1
peak level 1
PL2
peak level 2
−30 dB recursive; note 4
−20 dB recursive; note 4
3.5
4.3
5.3
dB
3.5
4.0
4.5
dB
PL3
peak level 3
0 dB recursive
0
0.4
1.0
dB
FEEDBACK LOOP NORMAL APPLICATION
DCL
dark-clip level
50
60
70
%
WCL
V5
white-clip level
SQPB input voltage
playback mode
180
187
194
%
4.0
−
−
V
Record storage capacitor for f0 processor and playback storage capacitor for envelope detector (pin 7)
VI
VNOR
VOFF
DC voltage
record mode
−
1.2
−
V
DC voltage of normal mode playback mode;
2.3
3.3
4.0
V
Vi = 350 mV (p-p); pin 14 HIGH
DC voltage of dropout
playback mode
correction (DOC) off mode
0
−
1.3
V
VNS
DC voltage at no input
playback mode
signal
1.1
1.6
2.1
V
GEon
tenv
envelope detector
switch-on level
(dropout active)
envelope detector operating
time
playback mode;
0 dB = Vi = 350 mV (p-p);
fi = 3.8 MHz; pin 14 HIGH
Ci = 0.1 µF
−13
−10
−7
dB
380
500
620
µs
1996 Oct 14
9
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