LV25400W Datasheet, PDF (15/42 Pages) Sanyo Semicon Device – Bi-CMOS LSI DSP Tuner Front End for Automotive Applications

Equivalent Circuits
Pin No.
Pin
1
FE.GND
2
OSC VCC
3
FM/AM OSC_B
4
FM/AM OSC_C
LV25400W
Description
Dedicated oscillator system power
supply
Oscillator connections
8V GND (F.E.)
8V VCC (VCO.)
4
Equivalent Circuit
VCC(2pin)
500Ω 500Ω
333Ω
3
5kΩ
5kΩ
5
Tuning voltage output FM mode :
Low-pass filter output A PLL filter is formed on pins 8
6
FET ground
through 11. (Pins 9 and 10 are left
7
AM filter
open.)
8
FM mode FET
9
AM mode FET
AM mode :
10
AM charge pump A PLL filter is formed on pins 7, 9, and
11
FM charge pump 10. In this mode, a low-pass filter is
formed by the internal impedance
(10kΩ) and an external capacitor.
VCC
PIN58
3kΩ
VDD
PIN23
1kΩ
5kΩ
5
6
7
8
9 10 11
VT
30kΩ
tentative
220pF
1.3kΩ
2200pF
2.2kΩ
12
DIGITAL GND
13
XTAL VCC
Dedicated crystal oscillator system
5V VCC (XTAL)
power supply
14
X'tal-OSC-IN
Connect a 4,5MHz crystal element
ES6
15
X'tal-OSC-OUT
between pins 14 and 15.
Connect a 10pF capacitor between
pin 14 and ground, and connect a
150pF capacitor between pin 15 and
ground.
1.5kΩ
1.5kΩ
35pF
1.5kΩ
1.5kΩ
333Ω
5kΩ 500Ω
1.5kΩ 1.5kΩ 500Ω
VCC(PIN13)
AMP
AMP
1kΩ 500Ω
AMP
17
333Ω
5kΩ
333Ω
1kΩ
20kΩ
ALC
to PLL
8pF 4pF 2pF
14
15
Continued on next page.
No.A0633-15/42