LV25400W_10 Datasheet, PDF (22/42 Pages) Sanyo Semicon Device – For Automotive Applications DSP Tuner Front End

Continued from preceding page.
Pin No.
Pin
48
FM IF-W_IN1
49
FM IF-W_IN2
LV25400W
Description
Wideband FM IF AGC clamp input
48
Equivalent Circuit
VCC(40pin)
49
20kΩ
10kΩ
10kΩ
50
AM RF-AGC
RF AGC rectifying capacitor
51
AM RF-AGC-Bypass Determines the distortion for
low-frequency modulation.
Increasing the size of C50 and C 51 :
Distortion → Improves
Response → Becomes slower
VCC(PIN 58)
5KΩ 1KΩ
15KΩ
Reducing the size of C50 and C 51 :
Distortion → Degrades
1kΩ
1kΩ
Response → Becomes faster
51
C59 ₊
1µF
750Ω
500Ω
500Ω
C64
50
10µF ₊
52
AM ANT-D
Provides the PIN diode drive current.
I52 = 6mA
This is the antenna dumping current.
100Ω
500Ω
VCC_8V
52
200Ω
500Ω
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