LV25200M Datasheet, PDF (18/45 Pages) Sanyo Semicon Device – Bi-CMOS IC Single chip Tuner IC for Car Radio

LV25200M
Continued from preceding page.
Pin
Function
54 PLL TEST PIN
(IF band variable filter
output)
Discription
IN3-1 Monitor
• IF_FIL
IF band variable filter output monitor (AC output)
Unit (Resistance: Ω, Capacitance: F)
Internal Equivalent Circuit
55 AM IFAGCBYPASS
IF AGC voltage DC smoothing capacitor pin
57 AM IF AGC
TR1; Time constant changeover at Seek
switch diode; 2.2μF
Discharging diode
1 At reception
Time constant depends on the external LPF
composition of pins 55 to 57.
2 Seek
Time constant is 57pin (C57) × 10Ω
56 AM LC
FM Pilot Det
58 AM W-AGC
AM LC;
Frequency characteristics of unnecessary voice
band of 100Hz or less is changed to produce the
clear sound in the AM mode.
AM LC f characteristic; Fc=1/(2π *2.5K*C56)
Pilot Det;
Insertion of 1MΩ between pin 56 and GND causes
the forced MONO mode.
For C56, 0.47μF or more is recommended.
AMP for W-AGC pickup incorporated
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No.A0976-18/45