LA75503V_01 View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LA75503V_01

Adjustment Free VIF/SIF Signal Processing IC for PAL TV/VCR

SANYO -> Panasonic 

LA75503V

Continued from preceding page.

Pin No.

Pin

16

AFT OUT

Pin Function

Pin 16 is the AFT output pin.

Use external resistors of 47 kΩ and a filter

capacitance 0.1 µF.

The AFT circuit generates the AFT voltage by

comparing the signal obtained by dividing the

4-MHz reference frequency with the signal obtained

by dividing VCO.

Since it uses a digital phase comparator, a dead

zone exists in the AFT center.

waveform

Internal Circuit

Pin 17 is the RF AGC output.

RF AGC max is determined by R1 and R2.

RF AGC min is determined by R3 and R4.

Capacitor C1 prevents oscillation and capacitor C2 Comparator

17

RF AGC OUT

is the RF AGC filter.

Normally 30 kΩ is used for R1, but if the tuner's F/E

transistor is GaAS, the gate's impedance is lower,

so use approx. 10 kΩ.

Pin 18 is the IF AGC filter pin.

Normally, 0.01 µF to 0.02 µF polyester film

18

IF AGC FILTER

capacitor is used.

Determine the impedance based on H-SAG and

AGC speed.

19

NC

Not connected

Continued on next page.

No. 6804-9/15

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