cxa2680er Sony Electronics, cxa2680er Datasheet

cxa2680er

Manufacturer Part Number

cxa2680er

Description

Five-channel Dual Cd/dvd Laser Driver For Ultra Combo Drives

Manufacturer

Sony Electronics

Datasheet

1.CXA2680ER.pdf (2 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

cxa2680er-T2

Manufacturer:

SONY

Quantity:

2 548

Current page: 1 of 2
Download datasheet (37Kb)

While both an increased output transient

waveform speed and an increased maxi-

mum output drive current are required to

achieve increased linear velocities,

increasing the maximum output drive

current required increasing the size of the

output transistors. However, increasing the

size of the output transistors leads to

delays in the output transient waveform.

Despite this tradeoff relationship, the

CXA2680ER achieves both of the follow-

ing output current performance levels.

• CD system total maximum drive current:

• DVD system total maximum drive

Thus this device can supply the required

maximum output drive current even

under severe operating conditions for both

CD and DVD. Furthermore, in the

CXA2680ER, Sony optimized the output

Five-Channel Dual CD/DVD Laser Driver for Ultra Combo Drives

CXA2680ER

Sony developed the CXA2680ER as a dedicated laser driver

IC that increases the number of channels to five to support

increased bit depth recording strategies. The CXA2680ER

also adds a DVD modulator amplitude switching function

to the CXA2640ER for use in dual drive systems and fea-

tures high linear velocity to follow the actuators used in

conventional CD-R/RW drives.

370 mA (figure 1)

current: 320 mA (figure 2)

It’s been five years since I first

started designing laser driver ICs,

and by now I have a good idea of

what is required in laser driver ICs.

I strongly recommend that you

look into the CXA2680ER, which

was developed based on this ac-

cumulated know-how.

Achieving both Higher

Output and Higher Speed

= 5 V, V

= 2.5 V, T = 150 °C)

= 3 V, T = 150 °C)

transient waveforms to have both higher

speed and a minimal amount of overshoot

by including a built-in waveform shaping

circuit. This allows this device to support

×8-speed DVD recording.

efforts to achieve the signal-to-noise

ratio required for higher linear speeds

achieved a noise level of 1.5 nA/√Hz (at

20 MHz, 35 mA, 20 mA p-p).

used to reduce noise during playback,

interference between the return light from

the disc and the laser beam due to varia-

tions in frequency causes noise to be

aggravated. The CXA2680ER cancels

frequency variations depending on the

internal resistance caused by VCO that has

the emitter junction multivibrator, thus

allowing noise to reduce.

modulator amplitude value that is

optimal for the DVD media used.

Sony’s painstaking low-noise design

In high-frequency modulator, which is

This function allows applications to set a

Read Channel Low Noise

High-Frequency Modulator

DVD System Modulator

Frequency Accuracy

Amplitude Switching

Function

CD system total maximum drive current: 370 mA

DVD system total maximum drive current: 320 mA

Rise/fall time: 1 ns

Support for strategy in all 5 channels

Read channel low noise: 1.5 nA/√Hz

High-frequency modulator frequency accuracy:

< ±10%

Built-in DVD modulator amplitude switching func-

tion

Support for a variety of timing signals

The CXA2680ER provides both differen-

tial inputs (LVDS/LVPECL) for higher

speeds and single-ended inputs (3.3 V

CMOS/TTL).

The CXA2680ER is provided in a 32-pin

VQFN (4.8 × 4.8 mm) miniature package

that can contribute to pickup miniaturiza-

tion through reductions in the mounting

area.

Not only is the package size noteworthy,

but this package can also increase the

efficiency with which heat is dissipated,

since it allows the heat sink to be con-

nected with silicon grease to the die pads,

which are exposed at the package surface.

Since this prevents heat from escaping

through the PWB to the laser diode, PWBs

using this device are easy on the laser

diode. This also allows the IC to be con-

nected at the rear surface.

Support for a Variety of

Small Package with Improved

Timing Signals

Heat Dissipation

Related parts for cxa2680er

cxa2680er Summary of contents

Page 1

... Five-Channel Dual CD/DVD Laser Driver for Ultra Combo Drives CXA2680ER Sony developed the CXA2680ER as a dedicated laser driver IC that increases the number of channels to five to support increased bit depth recording strategies. The CXA2680ER also adds a DVD modulator amplitude switching function to the CXA2640ER for use in dual drive systems and fea- tures high linear velocity to follow the actuators used in conventional CD-R/RW drives ...

Page 2

Output drive current temperature characteristics when input signals are applied to both write channels at the same time Vcc = 5 V, Vop = 2.5 V 500 450 400 350 300 250 200 150 100 25°C 50 150° ...

Related keywords

cxa2680er datasheet
cxa2680er data sheet
cxa2680er pdf datasheet
cxa2680er component
cxa2680er part
cxa2680er distributor
cxa2680er RoHS
cxa2680er datasheet download