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LA1816 Datasheet(PDF) 5 Page - Sanyo Semicon Device

Part # LA1816
Description  Single-Chip AM/FM, MPX Tuner System for Headphone Stereos, Radio-Cassette Recorders
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Manufacturer  SANYO [Sanyo Semicon Device]
Direct Link  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LA1816 Datasheet(HTML) 5 Page - Sanyo Semicon Device

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How to use the LA1816
1.
VCO stop
The VCO is stopped by shorting pin 10 and pin 8 (VCC pin).
Note) The maximum supply voltage on pin 10 must not exceed the voltage on pin 8.
2.
Free-running frequency check
Either of the following two methods is used to check the free-running frequency.
(a) Connect pin 12 to a frequency counter through the high input impedance amplifier.
(b) Connect the connection point of the semifixed resistor connected to pin 12 and the fixed resistor to a frequency counter
through the resistor of 240 k
Ω or greater.
How the error changes with the resistor value is shown in Figure 2.
3.
How to use the FM DET coil
For pin 17 (FM DET), a coil may be used instead of adjustment-free FM discriminator.
Figure 1
Figure 2
∆F–R
X
RX – Ω
1 – 3 10T
Qo=90
f = 10.7 MHz
82 pF internal
Figure 3 How to use the FM DET coil
Figure 4 FM DET Coil Characteristics
ANT input voltage – dBµ
Figure 5 FM DET Coil Characteristics
ANT input voltage – dBµ
Pin 4 (IF) input
LA1816, 1816M
No.2659-5/11


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