Datasheet > ATR0849-PFQG

ATR0849-PFQG

更新时间： 2024-01-02 05:33:28

品牌	Logo	应用领域
爱特美尔 - ATMEL		驱动器
页数	文件大小	规格书
6页	164K
描述
4-Channel LVDS Laser Driver for Dual-layer Application

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ATR0849-PFQG 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	QFN	包装说明：	HVQCCN, LCC24,.16SQ,20
针数：	24	Reach Compliance Code：	unknown
风险等级：	5.81	接口集成电路类型：	INTERFACE CIRCUIT
JESD-30 代码：	S-PQCC-N24	JESD-609代码：	e3
长度：	4 mm	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：	PLASTIC/EPOXY
封装代码：	HVQCCN	封装等效代码：	LCC24,.16SQ,20
封装形状：	SQUARE	封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
电源：	5 V	认证状态：	Not Qualified
座面最大高度：	1 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
温度等级：	COMMERCIAL	端子面层：	Matte Tin (Sn) - annealed
端子形式：	NO LEAD	端子节距：	0.5 mm
端子位置：	QUAD	宽度：	4 mm
Base Number Matches：	1

ATR0849-PFQG 数据手册

Features

• Current-controlled Output Current Source with 4 Input Channels

• LVDS Compatible Inputs at Channels 2, 3 and 4 with On-chip 100Ω 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 600 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 5V Power Supply

4-Channel LVDS

Laser Driver for

Dual-layer

• Small Pb-free QFN24, 4 mm × 4 mm Package

Application

Applications

• DVD+/-RW Dual Layer with CD-RW Capability

• Recordable Optical Drives

ATR0849

Summary

1. Description

The ATR0849 is a laser diode driver designed to operate two different grounded laser

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

four channels for four different optical power levels. The write channels (channels 2

to 4) can be controlled by fast LVDS (Low Voltage Differential Signaling).

The read channel generates a continuous output current, whereas 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 (channel 2 to 4) can contribute up to 350 mA

to the total output current of up to 600 mA. The read channel can contribute up to

150 mA. Total gains of 100 (read channel) and 250 (channels 2, 3 and 4), are pro-

vided between each reference current input and the selected output. Although the

reference inputs are current inputs, voltage control is possible by using external resis-

tors. 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 shutdown of the output currents is achieved by a low sig-

nal at the ENABLE input.

In read mode, the reference currents (I2, I3, I4) should be switched off to reduce

power consumption.

In case of uncertain (balanced) enable signals, a built-in fail-safe circuit will reduce the

laser diode output current to a safe value.

Rev. 4851BS–DVD–06/05

Note: This is a summary document. A complete dorcument

is available under NDA. For more information, please con-

tact your local Atmel sales office.

12 3 4 5 6

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