EL6258CU Elantec Inc, EL6258CU Datasheet

EL6258CU

Manufacturer Part Number

EL6258CU

Description

3-channel laser diode driver and oscillator + APC amplifier

Manufacturer

Elantec Inc

Datasheet

1.EL6258CU.pdf (2 pages)

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Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

EL6258CU

Manufacturer:

Quantity:

20 000

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Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these

specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.

Features

Applications

Ordering Information

• High-performance laser diode

• Voltage-controlled output current

• Current-controlled output current

• Rise time = 1.0ns

• Fall time = 1.1ns

• On chip oscillator with frequency

• Oscillator to 500MHz

• Oscillator to 100mA pk/pk

• Single +5V supply (±10%)

• Current amplification = 100

• Disable feature for power-up

• TTL/CMOS control signals

• Fast settling APC amplifier

• DVD drives

• CD-RW applications

• Writable optical drives

• Laser diode current switching

EL6258CU

Part No

driver

source requiring one external set

resistor per channel

source

and amplitude control by use of

external resistors to ground

protection and power savings

Temp. Range

0°C to +70°C

QSOP-24

Package

MDP0040

Outline #

EL6258C - Product Brief

3-Channel Laser Driver + Oscillator + APC Amplifier

General Description

The EL6258C is a high-performance three channel laser diode current

amplifier that provides controlled current to a grounded laser diode.

Channels 2 and 3 must be used as the write channels, with switching

speeds of approximately one nanosecond rise/fall time. All three chan-

nels are summed together at the I

create multilevel waveforms. Each level of output current is set by an

analog voltage applied to an external resistor which converts the volt-

age into a current at the I

these pins is then amplified by 100X (150X on CH3) to become a cur-

rent source at pin I

An on-chip 500MHz oscillator is provided to allow current modula-

tion when in the read mode. This is turned on when the OSCEN pin is

held high (floating not recommended). Complete control of amplitude

and frequency is set by two external resistors connected to ground at

pins RFREQ and RAMP (see graphs for further explanation). The

oscillator will also turn off whenever either of the OUTEN pins for

channels 2 or 3 (the write channels) are low (see truth table).

Output current pulses are enabled when an ‘L’ signal is applied to the

OUTEN pins. No output current flows when OUTEN is ‘H’ and addi-

tional laser diode protection is provided since the OUTEN input will

float high when open. Complete I

holding the ENABLE pin low, which will override the OUTEN con-

trol pins.

The EL6258C also includes a fast settling APC amplifier designed to

interface directly with the power monitor photodiode and the sample-

and-hold amplifier, for read and write power control.

Connection Diagram

OUT

OUTENR

OUTEN2

OUTEN3

pins (virtually ground). The current seen at

RFREQ

VOUT

VREF

GND

IINR

IIN2

IIN3

OUT

output, allowing the user to

shut-off is also achieved by

GND

VCC

IOUT

GND

RAMP

ENABLE

OSCEN

VCC

GND

PDIN

Related parts for EL6258CU

EL6258CU Summary of contents

Page 1

... Part No Temp. Range Package Outline # EL6258CU 0°C to +70°C QSOP-24 MDP0040 Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation. © ...

Page 2

EL6258C - Product Brief 3-Channel Laser Driver + Oscillator + APC Amplifier General Disclaimer Specifications contained in this data sheet are in effect as of the publication date shown. Elantec, Inc. reserves the right to make changes in the cir- ...

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