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T0816-PEQG

更新时间： 2024-01-28 17:28:57

品牌	Logo	应用领域
爱特美尔 - ATMEL		振荡器驱动器射频
页数	文件大小	规格书
14页	342K
描述
3 - CHANNEL LASER DRIVER WITH RF OSCILLATOR

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数据手册

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T0816-PEQG 数据手册

Features

• Current-controlled Output Current Source, 3 Input Channels

• Low-power Consumption

• Output Current per Channel to 250 mA

• Total Output Current to 300 mA

• Rise Time 1.0 ns, Fall Time 1.1 ns

• On-chip RF Oscillator

• Control of Frequency and Swing by Use of 2 External Resistors

• Oscillator Frequency Range from 200 MHz to 500 MHz

• Oscillator Swing to 100 mA

• Single 5 V Power Supply

• Common Enable, Disable Input

• TTL/CMOS Control Signals

• Small SSO16 Package and QFN16 Package

3-ChannelLaser

Driver with RF

Oscillator

Applications

• CD-RW Drives

• Writable Optical Drives

T0816

Description

The T0816 is a laser diode driver for the operation of a grounded laser diode for

CD-RW drives. It includes three channels for three different optical power levels which

are controlled by a separate IC. The read channel generates a continuous output level

whereas channels 2 and 3 are provided as write channels with very fast switching

speeds. Write current pulses are enabled when a ‘low’ signal is applied to the NE pins.

All channels are summed together at the IOUT pin. Each channel can contribute up to

250 mA to the total output current of up to 300 mA. A total gain of 100 (read channel),

250 (channel 2) and 150 (channel 3) are provided between each reference current

input and the output. Although the reference inputs are current inputs voltage control

is possible by using external resistors.

An on-chip RF oscillator is provided to reduce laser mode hopping noise during read

mode. Frequency and swing can be set by two external resistors. Oscillation is

enabled by a ‘high’ at the ENOSC pin. Complete output current and oscillator switch-

off is achieved by a ‘low’ at the ENABLE input.

Figure 1. Block Diagram

Channel 3

Channel 2

NE3

NE2

IOUT

NER

Read channel

RF oscillator

ENABLE

ENOSC

Rev. 4505G–DVD–09/03

12 3 4 5 6 7...14

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