LA4587 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LA4587

Preamplifier + Power Amplifier for 1.5 V Headphone Stereos

SANYO -> Panasonic 

Continued from preceding page.

Pin No.

Pin name

23 METAL1

26 METAL2

Pin voltage

[V]

0

LA4587M

Unit (resistance: Ω, capacitance: F)

Internal equivalent circuit

Remarks

c Connected to GND through

3.9 kΩ in metal on mode (pin

40: floating)

24 AMSS IN1

0.75

25 AMSS IN2

29 PRE REV IN1

0.75

30 PRE REV IN2

31 PRE FWD IN2

32 PRE FWD IN1

33 VREF

0.75

34 REF

0.75

c AMSS inverting input

connection.

c An external input resistor is

required.

b Pins 29 and 30 turn on in

REV mode (pin 39: GND).

c Pins 31 and 32 turn on in

FWD mode (pin 39: floating)

c When not using the head, a

bias resistor (2.2 kΩ) is

required between these pins

and VREF (pin 33).

c An anti-buzz capacitor is built

in.

c VREF amplifier output. Low

impedance is achieved due

to the output resistor (ro =

10 Ω).

c Inflow/outflow current:

200 µA max.

c The VREF amplifier is

referenced hereto.

36 AMSS OUT

c Outputs a pulse waveform in

accordance with the AMSS

IN (pins 24 and 25) input

level.

Continued on next page.

No.5204-7/18

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