LA75525AVA
Continued from preceding page.
Pin No. Pin name
Function
8
APC FILTER
PLL detector APC filter connection. For this APC filter we
recommend:
R = 150Ω
C = 0.47µF
Equivalent circuit
VCC
FROM
APC DET
1kΩ 1kΩ
A
9 COMPOSIT
VIDEO
OUTPUT
Output for the video signal that includes the SIF carrier. A resistor
must be inserted between pin 9 and ground to acquire adequate
drive capability
R2 ≥ 560Ω
B
8
20kΩ
1.5kΩ 2kΩ
9
10 US/JP-TV/FM Please use this pin only with OPEN.
SW
11 REFERENCE Reference frequency input from this pin. The reference frequency
CP INPUT
is 3.58MHz, inserting 270kΩ between this pin to GND.
The reference frequency is 4.0MHz, this pin leaving open.
12 AFT OUTPUT AFT output. AFT center voltage is generated by an external
bleeder. The AFT gain is increased by increasing the resistance
of this external bleeder resister. However, this resister must not
exceed 390Ω.
This circuit includes a control function that control the AFT voltage
to naturally approach the center voltage during weak field
reception.
66kΩ
1kΩ
10
34kΩ
200kΩ
500Ω
5pF
11
3pF 300Ω
300Ω
12
300Ω
Continued on next page.
No.A1256-7/10