LV25700PM Datasheet, PDF (17/68 Pages) Sanyo Semicon Device – For Car Radio Single chip Tuner IC

LV25700PM
Continued from preceding page.
Pin name
Function
51 HCC capacitor pin
Discription
With pin 51 external capacity and internal
resistor R, high-cut frequency
characteristics are set.
Internal resistance can be changed over
with 3 bits (10kΩ, 30kΩ, 50kΩ, 70kΩ, 90kΩ,
110kΩ, 130kΩ, 150kΩ) (HCC cut off)
Internal Equivalent Circuit
RF_VCC(PIN2)
R
10kΩ
1kΩ
51
52 MPX PLL input
LPF formed with internal resistance 30kΩ
and pin 34 eternal capacity
↓
HPF formed by subtracting the above LPS
passage signal from the Composite signal.
↓
Supply to MPX PLL circuit
GND(PIN48)
BB_VCC(PIN53)
52
1kΩ 30kΩ 1kΩ
53
NC MPX VCC
(NC, MPX, MRC)
54 Phase-Comparator
55 for MPX
VCC = 5V
54
55
BB_GND(PIN48)
BB_VCC(PIN53)
10kΩ 13kΩ 13kΩ 10kΩ
500Ω
500Ω
56 MRC TIME
The time constant for the Multipath-Noise
Detector is determined with the following:
100Ω resistor and external capacity during
discharge
IConstant and external capacity during
charge.
IConstant can be changed over with 2bits
(MRC time constant).
BB_GND(PIN48)
RF_VCC(PIN2)
Iconst
56
500Ω
500Ω
100Ω
20kΩ 20S
BB_GND(PIN48)
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