LA75503V_07 SANYO [Sanyo Semicon Device], LA75503V_07 Datasheet - Page 8

• Manufacturer Part Number: LA75503V_07
• Description: For PAL TV/VCR Adjustment Free VIF/SIF Signal Processing IC
• Manufacturer: SANYO [Sanyo Semicon Device]

Continued from preceding page.
Pin No.
10
6
7
8
9
SIF AGC FILTER
APC FILTER
VIDEO-OUT
FLL FILTER
Pin name
EQ-OUT
Pin 6 is the video output pin.
The EQ amplifier can be thought of as shown
below.
Therefore, the peak gain of the EQ amplifier is
determined by Av = 1 + R/Z.
However, note that the LA75503V being an IC
with V CC = 5V, setting too large an amplitude
causes distortion in the V
white level is 4V or less.
Pin 8 is the SIF AGC filter pin.
Use this pin with a capacitance between 0.01µF
and 0.1µF.
Pin 9 is the PLL detector APC filter pin.
Normally the following are used:
C1 = 1µF is effective for the over-modulation
characteristics.
When the PLL is locked, the signal passes via the
path marked A in the figure, and when PLL is
unlocked and in weak signal, the signal passes via
the path marked B in the figure. The PLL loop gain
can thus be switched in this manner.
Pin 10 is a VCO automatic control FLL filter pin.
Since it operates always on a small current, using
a larger capacitance results in a slower response.
Normally, a capacitance between 0.47µF and 1
µF is used.
Moreover, the control range for this pin is between
about 3V to 4.7V. Since this range is determined
when adjusting the VCO tank circuit, set the
design
center of L and C of VCO so that the voltage of pin
10 is 3.6 V.
R = 330Ω
C1 = 0.47µF to 1µF
C2 = 100pF
Pin function
CC
side. Use so that the
LA75503V
Output
Equivalent circuit
Output
Time
constant switch
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