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LA7386 Datasheet(PDF) 6 Page - Sanyo Semicon Device

Part No. LA7386
Description  NTSC Video Signal Processing LSI for VCRs
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Maker  SANYO [Sanyo Semicon Device]
Homepage  http://www.ssdc-jp.com/eng/
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 6 page
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Continued from preceding page.
Parameter
Symbol
Conditions
min
typ
max
Unit
REC ACC characteristics 2
ACCR2
VIN = standard color bar signal (1 Vp-p),
input –6 dB chroma signal level only, measure
T14A burst level, and calculate ratio with VOR-14
–0.5
–0.1
dB
REC ACC killer input level
VACCK-ON
VIN = standard color bar signal (1 Vp-p),
lower the chroma signal, and measure the input
burst level at the point where output at T14A
ceases, and calculate the ratio with the standard
input level
–30
–27
–24
dB
REC ACC killer output level
VOACCK
Use a spectrum analyzer to measure the output
level at T14A in the killer state described
previously; ratio with VOR-14
–60
–50
dB
Input level for REC ACC killer
return
VACCK–OFF
Starting from the killer state described previously,
gradually raise the input chroma level and
measure the input burst level when output is
generated at T14A and calculate the ratio with the
standard input level
–24
–21
–18
dB
VXO control sensitivity
SVXO
Measure the pin 16 DC voltage when a standard
color bar signal (1 Vp-p) is input ... VO
Measure the frequency at T18A when V0 is
applied to pin 16 from the external power
supply...f1
Measure the frequency at T18A when VO +10
mV is applied to pin 16 ...f2
SVXO =
f
2 –f1
10
Hz/mV
3.3
4.9
7.5
Hz/mV
REC APC pull-in range 1
∆ fAPC1
Input a 50% white signal overlapping with a
3.5795 MHz, 300 mVp-p continuous wave. After
confirming that there is output at T14A, increase
the frequency of the CW until the output at T14A
stops, and then gradually reduce the frequency
until output appears again at T14A; that CW
frequency is f1.
∆fAPC1 =f1 – 3579545 (Hz)
350
440
Hz
REC APC pull-in range 2
∆ fAPC2
In the same manner, reduce the frequency of the
CW until the output at T14A stops, and then
gradually increase the frequency until output
appears again at T14A; that CW frequency is f2.
∆fAPC2 =f2 – 3579545 (Hz)
–900
–350
Hz
BGP delay time for APC ACC
tD(N)
Input a standard color bar signal overlapping with
a 3.98 MHz, 300 mVp-p continuous wave, and
measure waveforms at T26 and T16.
4.8
µs
BGP pulse width for APC ACC
tW(N)
2.5
µs
REC AFC pull-in range 1
∆fAFC1
Input a string of pulses (negative polarity) at
286 mV, 15.7 kHz with a width of 5 µs. After
increasing the frequency of the pulse string until
the waveform at pin 20 is disrupted, then reduce
the frequency until the waveform at pin 20 is
normal again; that pulse string frequency is f1
∆fAFC1 =f1 – 15.734 (kHz)
+1.0
+7.0
kHz
Continued on next page.
LA7386
No.5472 - 6/13




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