LV25700PM Datasheet, PDF (12/68 Pages) Sanyo Semicon Device – For Car Radio Single chip Tuner IC

LV25700PM
Continued from preceding page.
Pin name
Function
7
FM-RF-DAC
Discription
FM RF tuning DAC
Internal Equivalent Circuit
RF_VCC(PIN2)
0.8mA
7
1kΩ
30kΩ
8
AM IF AGC
FM RF AGC
IF_GND(PIN72)
IF AGC voltage: DC smoothing capacitor pin
FM RF AGC voltage:
Voltage = Hi (around 8V) with AGC OFF.
The voltage lowers when a level is inserted
into the AGC circuit. AGC is applied at the
voltage of VCC-Vbe.
RF_VCC(PIN2)
FM_RF_AGC AM_IF_AGC
1kΩ 2kΩ 500Ω
36kΩ 1kΩ
500Ω 500Ω
AGC
48kΩ
10kΩ
1kΩ
20kΩ
2kΩ
9
FM-ANT-DAC
(IRR-DAC)
FM ANT tuning DAC
Can be used as an IRR-DAC selected with
a changeover switch.
10 FM MIXER IN1
11 FM MIXER IN2
FM MIX input
RF_VCC(PIN2)
8
IF_GND(PIN72)
0.8mA
1kΩ
30kΩ
100kΩ
7
133kΩ
IF_GND(PIN72)
16
10
11
10kΩ 10kΩ
20Ω 20Ω 20Ω 20Ω
12 RF GND2
(FE, FM, AM)
RF GND
RF_GND(PIN12)
Continued on next page.
No.A1709-12/68