cxa2636n Sony Electronics, cxa2636n Datasheet

cxa2636n

Manufacturer Part Number

cxa2636n

Description

Manufacturer

Sony Electronics

Datasheet

1.CXA2636N.pdf (2 pages)

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becoming increasingly fierce. Recently, the arena for this competition

has shifted from playback performance to write performance, and write

speeds are fast catching up with read speeds.

speed write. This device takes full advantage of the P-42B process,

which has a two and one half year volume production track record, as

an ultrahigh-speed photodiode IC fabrication process.

in the industry and aims at deployment in DVD recording.

a full product line of photodetector devices for optical disc recording

systems.

CXA2636N/CXA2637N

the photodetector ICs (PDIC) that de-

tect light reflected from the disc. The

CXA2636N and CXA2637N only dif-

fer in the size of the photoreceptor area,

and have patterns that expect the corre-

sponding limited and unlimited optical

systems.

increased the pulse response speed as

shown in table 1.

Photodetector (PDIC) for CD-R/RW Achieves 32 -Speed CD-R Write Performance

CXA2636N, CXA2637N, CXA2632EM

The competition to provide even higher speeds in optical disc drives is

Now, Sony has developed a photodetector IC (PDIC) that supports 32 -

Sony has perfected a product that has characteristics at the top level

Sony has also developed a new laser front monitor, and has achieved

The CXA2636N and CXA2637N are

To achieve 32 -speed write, Sony has

designing several custom ICs

every month to respond to

specific customer needs. Not

only does this involve designing

all the circuits, but it even

extends to taking detailed care

over individual transistor and

other device layout. I am confi-

dent that this level of care means

that these ICs will fully satisfy

our customers’ needs. Since I

will be developing high-perfor-

mance products, I strongly rec-

ommend that you try these ICs

in your products.

Recently, I have been very busy,

Response Speed

These devices include a 9 dB gain

switching function to allow them to both

avoid output saturation when a high-

power laser is used and to assure an

adequate signal-to-noise ratio during

playback.

These devices retain the low noise

which is a feature of Sony PDIC prod-

ucts by forming the I-V amplifier (cur-

rent to voltage conversion circuit) as a

single stage and by adopting a technique

in which the transimpedance is switched

by switching the gain. Also, since these

ICs provide an RF output (the summed

output of the A to D main beam signals),

they make it possible to reproduce the

faint signals from CD-RW and other

formats clearly.

Since these devices retain the body size

of the conventional 12-pin package

while providing 14 pins, they allow the

size of the optical pickup to be main-

tained. Furthermore, these devices take

mounting simplification into consider-

ation by adopting a surface mounting

type (the so-called “gull wing” form) for

the lead geometry. Note that this pack-

age can withstand reflow soldering, al-

though certain conditions do apply.

Low Noise

Miniature Transparent

Gain Switching Function

Molded Package

CXA2632EM

The CXA2632EM is a laser diode

power monitor (front monitor) PDIC.

The CXA2632EM adopts a newly-

developed ultraminiature COB (chip on

board) package, and since it includes a

built-in power supply decoupling

capacitors, it can contribute to reduc-

ing the mounting area. This package

also supports reflow soldering.

Since this device has a response time of

20 ns (maximum), it is more than

adequate for 32 -speed write drives.

This device achieves an output dynamic

range of 2.8 V (typical) when Vref is

3.0 V due to a new circuit type.

COB Package

Response Speed

Wide Dynamic Range

Supports 32 -speed write CD-R

Includes a gain switching func-

tion (9 dB)

Low noise (–88 dBm during play-

back for the A to D signals)

Built-in RF output (sum of the A

to D signals)

Miniature transparent 14-pin sur-

face mounting type (gull wing)

molded package

Related parts for cxa2636n

cxa2636n Summary of contents

Page 1

... CXA2636N/CXA2637N The CXA2636N and CXA2637N are the photodetector ICs (PDIC) that de- tect light reflected from the disc. The CXA2636N and CXA2637N only dif- fer in the size of the photoreceptor area, and have patterns that expect the corre- sponding limited and unlimited optical systems ...

Page 2

... Vcc Figure 2 CXA2636N/CXA2637N Block Diagram Table 1 Pulse Response Speed Main signal Slew rate 350 V/ s (Typ.) Settling time 10 ns (Typ.) Sub-signal Slew rate 150 V/ s (Typ.) Settling time 15 ns (Typ.) 4 Vcc 0.1 F ...

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