LA1837M Просмотр технического описания (PDF) - ON Semiconductor

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производитель

LA1837M

Single-Chip AM/FM Tuner IC for Home Stereo Systems

ON Semiconductor 

Continued from preceding page.

Pin No.

Pin

24

AM detector

output

Pin

voltage

0V (FM)

0.5V (AM)

25

AM AGC

0V (FM)

0.5V (AM)

26

AFC

Vreg

27

AM RF input

Vreg

28

REG

Vreg

LA1837M

Equivalent circuit

Pin function

Output impedance ro = 3.3kΩ The AM frequency characteristics

can be adjusted with an RC circuit connected between pin 22 and

ground.

Internal load resistance R = 11kΩ

The FM SD bandwidth can be adjusted with an external resistor

connected between this pin and pin 28.

This pin must be held at the same potential as pin 28

Vreg = 3.6V

29

OSC

Vreg

30

Oscillator buffer 1.6V (FM)

output, FM SD 1.3V (AM)

sensitivity

adjustment

Connect the oscillator coil between this pin and pin 28.

The FM SD sensitivity can be adjusted with an external resistor

connected between this pin and ground.

Output impedance ro = 20Ω

No.8271-6/9

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