LA4590W データシートの表示（PDF） - SANYO -> Panasonic

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LA4590W

1.5 V Stereo Headphone Preamplifier and Power Amplifier

SANYO -> Panasonic 

Continued from preceding page.

Pin No.

Symbol

VDC (V)

23

METAL1

0

26

METAL2

LA4590W

Equivalent circuit

Unit (resistance: Ω, capacitance: F)

Pin function

• Connected to ground by a 3.9 kΩ resistor when

metal is selected (pin 40 is floating).

24

AMS IN1

0.75

25

AMS IN2

29

PRE REV IN1

30

PRE REV IN2

0.75

31

PRE FWD IN2

32

PRE FWD IN1

33

VREF

0.75

34

REF

0.75

• AMS inverting input pins

• External input resistors must be connected to

these pins.

• Pins 29 and 30 are on in reverse mode (when

pin 39 is grounded).

• Pins 31 and 32 are on in forward mode (when

pin 39 is floating).

• When a particular head is not used, 2.2 kΩ bias

resistors must be inserted between the

corresponding pins and Vref (pin 33).

• Buzz suppression capacitors are built-in.

• VREF amplifier output pin. A built-in output

resistor (ro, about 10 Ω) makes this a low

impedance output.

• The current (inflow and outflow) capacity of this

pin is 200 µA, maximum.

• VREF amplifier reference

36

AMS OUT

• Outputs a pulse waveform that depends on the

AMS IN (pins 24 and 25) input levels.

Continued on next page.

No. 4468-7/19

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