LV25700PM Datasheet, PDF (19/68 Pages) Sanyo Semicon Device – For Car Radio Single chip Tuner IC

LV25700PM
Continued from preceding page.
Pin name
Function
61 VREF 4.9V
Discription
Reference voltage
Internal Equivalent Circuit
RF_VCC(PIN2)
1kΩ
4.9V+Vbe
1kΩ
61
77kΩ
26kΩ
62 AM IF AMP input1 AM 450kHz AMP input
63 AM IF AMP input2 Input impedance = 2kΩ
IF_GND(PIN72)
62
2.5kΩ
63
1kΩ
10kΩ
10kΩ
64 MUTE CONT
Noise convergence adjustment
Mute OFF function
MUTE is turned OFF when pin 64 is short-
circuited with GND.
65 IF AGC LPF
Time constant changeover at Seek
switch diode
IF_GND(PIN72)
Mute
AMP
LOGIC D/A
500Ω
BB_GND(PIN48)
64
10Ω 100Ω
65
100Ω
66
Frequency characteristics of unnecessary
voice band of 100Hz or less is changed to
RF_VCC(PIN2)
produce the clear sound in the AM mode.
400Ω
1kΩ 1kΩ
1kΩ 1kΩ
66
10kΩ
IF_GND(PIN72)
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