CXA2647 View Datasheet(PDF) - Sony Semiconductor

Part Name

Description

Manufacturer

CXA2647

RF Signal Processor for CD Players

Sony Semiconductor 

CXA2647N

• VC Buffer

• DVC Buffer

This outputs the VC ((1/2) VCC) voltage.

The maximum output current is approximately ±3mA.

Use this voltage as the analog block VC voltage.

VCC

This outputs the DVC ((1/2) DVCC) voltage.

The maximum output current is approximately ±3mA.

Use this voltage as the digital block VC voltage.

The each output DC voltage of FE, TE and CE is

level shifted using the DVC voltage as the reference.

40k

VC 27

25

40k

DVC 14

25

DVCC

40k

40k

• RFDC

The signals input to the A, B, C and D pins are added, amplified and the RFDC signal is output. ROM/RW

switching, low frequency gain adjustment and output DC voltage adjustment are possible.

A6

B7

C8

D9

ROM

VC

RW

VC

Control bias

30 VC – 1V to VC + 1V

ROM RW

24k

96k

5.1k

15k 10k

15k

ROM

15k

40k RW

15k

2.4k

3.3k

RFDCI 29

124

2k

VC

28 RFDC

124

RFDC = Gain (A + B + C + D)

Low frequency gain ROM: 16.5dB

RW: 28.5dB

Cut-off frequency fc (typ.)

ROM : 15MHz

RW : 6MHz

The gain can be adjusted by the external resistance connected between Pins 28 and 29.

The output voltage offset can be adjusted by controlling the Pin 30 voltage.

– 12 –

Share Link: