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LA75520KVA Datasheet(PDF) 8 Page - Sanyo Semicon Device

Part No. LA75520KVA
Description  Monolithic Linear IC IF Signal Processing (VIFSIF) IC that Supports the PAL Video Standard for TV Sets and VCRs
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Manufacturer  SANYO [Sanyo Semicon Device]
Direct Link  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LA75520KVA Datasheet(HTML) 8 Page - Sanyo Semicon Device

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LA75520KVA
No.A0654-8/12
Pin Functions
Pin No.
Pin name
Function
Equivalent Circuit
1
DE-EMPHASIS C
De-emphasis capacitor connection pin
This is used to switch the equivalent resistance
(5k
Ω or 7.5kΩ) internally in the IC to select the time
constant.
This switching is linked to the SIF input switch.
To disable de-emphasis, disconnect the capacitor.
Connection of an external capacitance of 0.01
μF
enables switching between 50 and 75
μs.
When the FM detector circuit is not to be used, the
FM VCO can be stopped by connecting it to ground
with a resistor of 1k
Ω or less.
1
4k
Ω
0.01
μF
2
SIF AGC FILTER
AGC filter pin for SIF carrier
0.01
μF is recommended for C1.
2
2k
Ω
C1
3
FM PLL FILTER
PLL filter pin of FM detector
This is used to configure an external lag lead filter.
Example: Connect 330pF in parallel with the filter on
the left (0.033
μF + 3.3kΩ).
3
0.033
μF
3.3k
Ω
330pF
3
8k
Ω
4
VCC
Power supply
5
6
EQ OUT
EQ FILTER
Equalizer circuit. This circuit is used to correct the
video signal frequency characteristics.
Notes on equalizer amplifier design
• The equalizer amplifier is designed as a voltage
follower amplifier with a gain of about 0 dB. When
used for frequency characteristics correction, a
capacitor, inductor, and resistor must be
connected in series between pin 6 and ground.
Equalizer amplifier gain AV =
R1
Z
+ 1
R1 is the IC internal resistance, and is 1k
Ω. In the
application design, simply select Z to correspond
to the desired characteristics. However, since the
EQ amplifier gain will be maximum at the resonant
point defined by Z, care is required to assure that
distortion does not occur.
6
R1:1k
Ω
5
2k
Ω
C
L
R
Z
Continued on next page.


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