LV25700PM Datasheet, PDF (20/68 Pages) Sanyo Semicon Device – For Car Radio Single chip Tuner IC

LV25700PM
Continued from preceding page.
Pin name
Function
67 SEPA ADJ
Discription
The input level of sub-decoder is varied
through BIT control.
(The output level of MONO and MAIN
remains unchanged.)
(Separation Control)
SUB
Internal Equivalent Circuit
SUB BIAS
13kΩ
1kΩ
500Ω 500Ω
14kΩ
67
68
AM 2^nd MIXER
output
The mixer coil connected to the pin 68
mixer output must be wired to VCC = 8V.
BB_GND(PIN48)
RF_VCC(PIN2)
100Ω
68
69
FM 2^nd MIXER input1 FM 2^nd MIXER
70
FM 2^nd MIXER input2 10.7MHz → 450kHz
FM AMP (10.7MHz)
AMP for S-meter voltage
AM MIXER input
AMP for AM Noise AGC pickup
OSC
69
100Ω
70
167Ω 167Ω
100Ω
300Ω
500Ω
500Ω
500Ω
600Ω 600Ω
71 Modulation INDEX Set the detection output level as DC output.
C71 is the smoothing capacitor.
IF_GND(PIN72)
BB_VCC(PIN53)
800Ω
500Ω 1kΩ
72 IF GND
(IF)
71
150Ω
33kΩ
170kΩ
IF GND
BB_GND(PIN48)
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