CXA2556Q Ver la hoja de datos (PDF) - Sony Semiconductor

Número de pieza

componentes Descripción

Fabricante

CXA2556Q

RF Amplifier for CD Player/CD-ROM

Sony Semiconductor 

CXA2556Q

Center Voltage Generation Circuit

The center voltage of VR = (Vcc + GND)/2 is supplied. The maximum current is approximately ±3mA.

VCC

VCC

40k

Vc Buffer

25 VR

16

Vc

40k

APC Circuit

When the laser diode is driven by a constant current, the optical power output has extremely large negative

temperature characteristics.

The APC circuit is used to maintain the optical power output at a constant level. The laser diode current is

controlled according to the monitor photodiode output.

APC is ON by connecting APC_ON pin to GND; it is OFF by connecting the pin to Vcc.

VCC

PD

2

56k

8k

100µ

10

10k

1k

LD

1

10k

55k

56k

10µ

10k

1.25V

1µ

100

500

– 18 –

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