LA1836M Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Fabricante

LA1836M

Single-Chip Home Stereo Electronic Tuning IC

SANYO -> Panasonic 

Continued from preceding page.

Pin No.

Function

Voltage

12

S-meter output, AM SD 0.5 V (FM)

sensitivity adjustment

0 V (AM)

LA1836, 1836M

Internal equivalent circuit

Remarks

The AM SD sensitivity can be adjusted with the

resistor between this pin and ground.

The AM SD sensitivity should be adjusted first,

since the FM SD sensitivity is affected by this

adjustment.

13

AM narrow band CF

connection

1.5 V

Recommended narrow band CF: BFU450C4N

(Murata)

Phase comparator low- VCC – 1.4

14

pass filter

(FM)

(FM/AM switch)

0 V (AM)

Pilot detector low-pass

15

filter (forced mono)

VCC – 1.0

(VCO stop)

16

Post-amplifier L output VREG

17

and R output

VREG

18

Post-amplifier L input

VREG

19

and R input

VREG

20

MPX output, L output

3.5 V

21

and R output

3.5 V

22

MPX input

2.9 V

AM mode selected when this pin is connected to

ground.

The circuit is forced to mono when a current of

50 µA or larger flows from this pin.

Connecting this pin to ground stops the VCO.

Output impedance ro = 200 Ω

Pin 16: left output

Pin 17: right output

Inverting inputs: ri = 3.3 kΩ

Pin 18: left input

Pin 19: right input

Output impedance ro = 3.3 kΩ

Pin 20: left de-emphasis

Pin 21: right de-emphasis

Input impedance ri = 20 kΩ

The low-band separation characteristics are

improved by increasing the value of the capacitor

connected between this pin and pin 24. However,

the impulse noise associated with AM/FM

switching will increase.

Continued on next page.

No. 4787-6/13

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