CXA2557 查看數據表（PDF） - Sony Semiconductor

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CXA2557

RF Amplifier for CD Player/CD-ROM

Sony Semiconductor 

Pin Description

Pin

No.

Symbol

I/O

1 LD

O

Equivalent circuit

10k

1

124

CXA2557R

Description

APC amplifier output.

2 PD

I

55k

124

20k

2

20k

APC amplifier input.

3

4

3A

4B

5C

6D

I

5

I

I

I

6

7 GND

40k

40k

40k

10k 45k

40k

40k

40k

40k

40k

130k

40k

40k

40k

40k

180k

180k

180k

180k

130k

130k

130k

—

Inputs of RF summing amplifier

and focus error amplifier.

When using a laser coupler:

A + C = PD1

B + D = PD2

Ground.

–4–

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