Datasheet > ATR0842-PFQW

ATR0842-PFQW

更新时间： 2024-01-13 00:20:47

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
6页	163K
描述
Display Driver, CMOS, PQCC24

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技术参数
数据手册

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ATR0842-PFQW 技术参数

是否Rohs认证：	符合	生命周期：	Transferred
包装说明：	QCCN, LCC24,.16SQ,20	Reach Compliance Code：	compliant
风险等级：	5.76	JESD-30 代码：	S-PQCC-N24
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：	QCCN	封装等效代码：	LCC24,.16SQ,20
封装形状：	SQUARE	封装形式：	CHIP CARRIER
电源：	5 V	认证状态：	Not Qualified
子类别：	Display Drivers	标称供电电压：	5 V
表面贴装：	YES	技术：	CMOS
温度等级：	COMMERCIAL	端子形式：	NO LEAD
端子节距：	0.5 mm	端子位置：	QUAD
Base Number Matches：	1

ATR0842-PFQW 数据手册

Features

• Current-controlled Output Current Source with 4 Input Channels

• Two Selectable Outputs for Grounded Laser Diodes

• Output A Suited for Blue Laser Diodes: V_LD≤6V (VCCH ≤8V)

• LVDS/CMOS Compatible Inputs Channel 2, 3, and 4

• Output Current per Channel up to 350 mA

• Total Output Current up to 500 mA

• On-chip RF Oscillator

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

• Oscillator Frequency Range from 200 MHz to 500 MHz

• Maximum Oscillator Current Amplitude 100 mApp

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

4-channel LVDS

Laser Diode

Driver with High

Voltage Output

for Blue Laser

Applications

• DVD Blue Laser

• DVD-RAM/DVD-RW/DVD+RW with CD-RW Capability

• Recordable Optical Drives

1. Description

ATR0842

Summary

The ATR0842 is a laser diode driver designed to operate two differently grounded

laser diodes. The output, IOUTA, can be used for a blue laser diode (400 nm) with up

to 6V voltage drop by applying 8V at pin VCCH. The other output, IOUTB, supports

legacy laser diodes for DVD-RW/+RW/RAM (650 nm) and CD-RW (780 nm). The

device includes four channels for four different optical power levels. The write chan-

nels (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.

The read function of the 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.

NOTE: This is a summary document.

For more information, please contact

your local Atmel sales office.

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

laser diode output current within the defined range.

4819BS–DVD–07/06

12 3 4 5 6

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