Datasheet > CXA2680ER

CXA2680ER

更新时间： 2024-09-24 06:51:27

品牌	Logo	应用领域
索尼 - SONY		驱动器 DVD
页数	文件大小	规格书
2页	53K
描述
Five-Channel Dual CD/DVD Laser Driver for Ultra Combo Drives

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技术参数
数据手册

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CXA2680ER 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	QFN
包装说明：	VQCCN, LCC32,.2SQ,16	针数：	32
Reach Compliance Code：	unknown	风险等级：	5.68
接口集成电路类型：	INTERFACE CIRCUIT	JESD-30 代码：	S-PQCC-N32
JESD-609代码：	e6/e4	长度：	4.8 mm
功能数量：	1	端子数量：	32
最高工作温度：	75 °C	最低工作温度：	-10 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	VQCCN
封装等效代码：	LCC32,.2SQ,16	封装形状：	SQUARE
封装形式：	CHIP CARRIER, VERY THIN PROFILE	峰值回流温度（摄氏度）：	260
电源：	5 V	认证状态：	Not Qualified
座面最大高度：	0.9 mm	子类别：	Display Drivers
最大供电电压：	5.5 V	最小供电电压：	4.5 V
标称供电电压：	5 V	表面贴装：	YES
技术：	BIPOLAR	温度等级：	COMMERCIAL EXTENDED
端子面层：	TIN BISMUTH/PALLADIUM	端子形式：	NO LEAD
端子节距：	0.4 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	10	宽度：	4.8 mm
Base Number Matches：	1

CXA2680ER 数据手册

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

CXA2680ER

CD system total maximum drive current: 370 mA

DVD system total maximum drive current: 320 mA

Rise/fall time: 1 ns

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.

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

Achieving both Higher

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.

Support for a Variety of

Timing Signals

Output and Higher Speed

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:

370 mA (figure 1)

The CXA2680ER provides both differen-

tial inputs (LVDS/LVPECL) for higher

speeds and single-ended inputs (3.3 V

CMOS/TTL).

Read Channel Low Noise

Sony’s painstaking low-noise design

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).

Small Package with Improved

Heat Dissipation

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.

High-Frequency Modulator

Frequency Accuracy

In high-frequency modulator, which is

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.

(V_CC= 5 V, V_OP= 2.5 V, T = 150 °C)

• DVD system total maximum drive

current: 320 mA (figure 2)

(V_CC= 5 V, V_OP= 3 V, T = 150 °C)

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

DVD System Modulator

Amplitude Switching

Function

This function allows applications to set a

modulator amplitude value that is

optimal for the DVD media used.

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.

中文翻译

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