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LA75503V_01 View Datasheet(PDF) - SANYO -> Panasonic

Part Name
Description
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LA75503V_01 Datasheet PDF : 15 Pages
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LA75503V
Continued from preceding page.
Pin No.
Pin
5
NC
Not connected
Pin Function
Pin 6 is the video output pin.
The EQ amplifier can be thought of as shown
below.
6
VIDEO-OUT
7
EQ-OUT
Therefore, the peak gain of the EQ amplifier is
determined by Av = 1 + R/Z.
However, note that the LA75503V being an IC with
VCC = 5 V, setting too large an amplitude causes
distortion in the VCC side. Use so that the white
level is 4 V or less.
Pin 8 is the SIF AGC filter pin.
8
SIF AGC FILTER
Use this pin with a capacitance between 0.01 µF
and 0.1 µF.
Internal Circuit
Pin 9 is the PLL detector APC filter pin.
Normally the following are used:
R = 330
C1 = 0.47 µ to 1 µF
C2 = 100 pF
C1 = 1 µF is effective for the overmodulation
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
9
APC FILTER
the path marked B in the figure. The PLL loop gain
can thus be switched in this manner.
10
FLL FILTER
output
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 0.47 µF and 1 µF
is used.
Moreover, the control range for this pin is between
about 3 V to 4.7 V. 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.
Time
constant switch
output
Continued on next page.
No. 6804-7/15
 

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