LA1835 Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Fabricante

LA1835

Home Stereo Single-Chip Tuner IC with Electronic Tuning Support

SANYO -> Panasonic 

Continued from preceding page.

No.

Function

Voltage

20

MPX outputs

3.5

21

Left and right outputs

3.5

LA1835

Internal equivalent circuit

Note

Output impedance ro = 3.3 kΩ

Pin 20: left de-emphasis

Pin 21: right de-emphasis

22

MPX input

2.9

Input impedance ri = 20 kΩ

Increasing the value of the external capacitor

connected between this pin and pin 24 improves

the low frequency separation characteristics.

However, the impulse noise associated with

switching between AM and FM also increases.

23

MPX VCO

3.5 (FM)

0 (AM)

Recommended ceramic oscillator: CSB456F15

(Murata Mfg. Co., Ltd.)

24

AM/FM demodulator

output

2.9 (FM)

3.0 (AM)

25

AM low cut

2.9 (FM)

3.0 (AM)

Output impedances

FM: ro = 250 Ω

AM: ro = 10 kΩ

The separation can be adjusted by changing the

value of the external capacitor connected between

this pin and ground.

The low-band frequency characteristics of the AF

demodulator can be adjusted by changing the value

of the external capacitor connected between this

pin and ground. The AM detector output can be

attenuated by adding a resistor in series with the

capacitor.

26

AMAGC

0 (FM)

0.5 (AM)

The internal load resistance, R is 6.7 kΩ.

27

AM RF input

Vreg

Pin 27 must be used at the same voltage as pin 4,

the regulator voltage.

Continued on next page.

No. 4159-7/14

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