LV25200M_10 Datasheet, PDF (11/45 Pages) Sanyo Semicon Device – Single chip Tuner IC for Car Radio

LV25200M
Continued from preceding page.
Pin
Function
8
Tuning voltage output
LPF output
9
FET for FM
10 FET for AM
Discription
FM:
PLL filter formed with pins 9 to 12
(Pins 10 and 11 to be left OPEN)
AM:
PLL filter formed with pins 10 and 11. In this case,
the low pass filter is formed with the internal
impedance (100kΩ) and external capacity.
11 Charge pump for FM Simultaneous use of AM and FM filters (pins 9 to
12) is possible through mode changeover. In this
case, internal impedance (100kΩ) is short-circuited.
12 Charge pump for AM
Unit (Resistance: Ω, Capacitance: F)
Internal Equivalent Circuit
13
VDD for PLL
PLL regulator output (4V)
14 AM/FM SD pin
STEREO indicator
&
VCO Monitor
STEREO indicator at reception:
Low: STEREO
High: MONO
At SEEK:
AM/FM SD
ON=High
OFF=Low
Pin 14 output is output from DO (for SD information
output).
VCO monitor (at IN3-5 D6=H)
Saw-tooth wave of MPX-VCO frequency is output,
which is monitored for VCO adjustment
(Adjust with IN3-5 D0-5.)
15 Separation adjustment The input level of sub-decoder is varied through
pin
BIT control.
(The output level of MONO and MAIN remains
unchanged.)
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