LV25400W Sanyo Semicon Device, LV25400W Datasheet - Page 15

• Manufacturer Part Number: LV25400W
• Description: DSP Tuner Front End
• Manufacturer: Sanyo Semicon Device

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