Datasheet > ATR0844-PFQG

ATR0844-PFQG

更新时间： 2024-11-21 20:10:59

品牌	Logo	应用领域
爱特美尔 - ATMEL		接口集成电路
页数	文件大小	规格书
6页	122K
描述
Interface Circuit, 4 X 4 MM, LEAD FREE, MO-220, QFN-24

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ATR0844-PFQG 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	QFN
包装说明：	HVQCCN,	针数：	24
Reach Compliance Code：	compliant	风险等级：	5.84
接口集成电路类型：	INTERFACE CIRCUIT	JESD-30 代码：	S-XQCC-N24
JESD-609代码：	e4	长度：	4 mm
湿度敏感等级：	2	功能数量：	1
端子数量：	24	最高工作温度：	70 °C
最低工作温度：		封装主体材料：	UNSPECIFIED
封装代码：	HVQCCN	封装形状：	SQUARE
封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	1 mm
最大供电电压：	5.9 V	最小供电电压：	4.5 V
标称供电电压：	5 V	表面贴装：	YES
温度等级：	COMMERCIAL	端子面层：	NICKEL PALLADIUM GOLD
端子形式：	NO LEAD	端子节距：	0.5 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	40
宽度：	4 mm	Base Number Matches：	1

ATR0844-PFQG 数据手册

Features

• Current-controlled Output Current Source with 4 Input Channels

• LVDS Compatible Inputs Channel 2, 3, and 4 with On-chip 100 Ω Termination

• Separate Read-Channel Enable

• Two Selectable Outputs for Grounded Laser Diodes

• Output Current per Channel up to 350 mA

• Total Output Current up to 500 mA

• On-chip RF Oscillator

• Control of 2 Different Swings and Frequencies by Use of 4 External

Resistors

• Oscillator Frequency Range from 200 MHz to 500 MHz

• Maximum Oscillator Current Amplitude 100 mApp

• Single 5 V Power Supply

4-channel Laser

Driver with

• Small Pb-free QFN24 Package (4 mm × 4 mm)

2 Outputs and

3 LVDS Inputs,

NER Enable,

On Chip

Applications

• DVD+RW with CD-RW Capability

• DVD-RW with CD-RW Capability

• Recordable Optical Drives

Termination

Description

The ATR0844 is a laser diode driver designed to operate two different grounded laser

diodes for DVD-RW/+RW (650 nm) and CD-RW (780 nm). The device includes four

channels for four different optical power levels. The write channels (channel 2 to 4)

can be controlled either by fast LVDS (Low Voltage Differential Signaling) or by single-

ended standard CMOS logic. In case of single-ended use, each of the ENABLE inputs

(NEx or Ex) can be used, the complementary input may be left open. There is no need

for blocking or connection to a reference voltage.

ATR0844

Summary

The function of the read channel is to generate a continuous output current, channels

2 to 4 are designed as write channels with very fast switching speed. All channels are

summed together and routed to one of the two outputs, IOUTA or IOUTB, controlled

by the select input SELA. Each write channel (channels 2 to 4) can contribute up to

350 mA to the total output current of up to 500 mA. The read channel can contribute

up to 150 mA. Total gain of 100 (read channel) and 250 (channel 2, 3 and 4), respec-

tively, are provided between each reference current input and the selected output.

Although the reference inputs are current inputs, voltage control is possible by using

external resistors. An on-chip RF oscillator is available to reduce laser-mode hopping

noise during read mode. The oscillator current amplitude can be set independently for

the two selectable outputs with two different resistors. Oscillation is enabled by a high

signal at the ENOSC pin. Complete shut-down of the output currents is achieved by a

low signal at the ENABLE input.

In case of uncertain (balanced) enable signals, a built-in protection circuit keeps the

laser diode output current within the defined range.

Rev. 4821AS–DVD–08/04

12 3 4 5 6

中文翻译

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与ATR0844-PFQG相关器件

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ATR0849-PFQG	ATMEL	获取价格	4-Channel LVDS Laser Driver for Dual-layer Application
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ATR0885	ATMEL	获取价格	3-output Laser Driver for HD-DVD/ Blu-ray/DVD/ CD-ROM
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