LV25450PNW Datasheet, PDF (21/40 Pages) Sanyo Semicon Device – For Automotive Applications DSP Tuner Front End

Continued from preceding page.
Pin No.
Pin Function
50
AM-RF-AGC
LV25450PNW
Description
RF AGC rectifying capacitor
Determines the distortion for
low-frequency modulation.
Increasing the size of C50 :
Distortion → Improves
Response → Becomes slower
Reducing the size of C50 and C 51 :
Distortion → Degrades
Response → Becomes faster
Equivalent Circuit
VCC (61pin)
15kΩ
1kΩ
50
750Ω
51
AM-RF-AGC
Reducing the size of C51 :
(Bypass)
Distortion → Degrades
Response → Becomes faster
52
AM-ANT-D
Provides the PIN diode drive current.
This is the antenna dumping current
output.
53
FM N-AGC-IN
FM narrow AGC input
54
MIX-OUT
Mixer output
(common to FM and AM)
55
MIX-OUT
100Ω
500Ω
1kΩ
51
50kΩ
500Ω
VCC_8V
52
200Ω
500Ω
2.5kΩ
53
1kΩ
10kΩ
2.2V
54
55
FM MIX
AM MIX
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