EL6249CU Elantec Inc, EL6249CU Datasheet

EL6249CU

Manufacturer Part Number

EL6249CU

Description

Manufacturer

Elantec Inc

Datasheets

1.EL6249CU.pdf (2 pages)

2.EL6249CU.pdf (2 pages)

Specifications of EL6249CU

Date_code

Available stocks

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Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

EL6249CU

Manufacturer:

Quantity:

2 110

Company:

Meier Automation Equipment Co., Limited

Part Number:

EL6249CU

Manufacturer:

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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

• “Shrink-Small” Outline Package

• Voltage controlled output current

• Auto Oscillator On-Off with

• Rise time = 0.8ns

• Fall time = 0.8ns

• 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

• CMOS control signals

• CD-RW applications

• Writable optical drives

• Laser diode current switching

EL6249CU

source, requiring one external set

resistor per channel

OUTEN Signals

and amplitude control by use of

external resistors to ground

protection and power savings

Part No.

Temp. Range

0°C to +70°C

16-Pin QSOP

Package

MDP0040

Outline #

EL6249C - Product Brief

4-Ch Laser Diode Driver + Oscillator

General Description

The EL6249C is a four channel laser diode current amplifier that pro-

vides controlled current to a grounded laser diode. Channels 2, 3, and 4

should be used as the write channels, with switching speeds of approxi-

mately one nanosecond rise/fall time. All four channels are summed

together at the I

forms in order to optimize laser diode performance. The level of the

output current is set by an analog voltage applied to an external resistor

which converts the voltage into a current at the I

ground). The current seen at this pin is then amplified to become a cur-

rent source at pin I

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

OUTEN pin. 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

ing the ENABLE pin low, which will override the OUTEN control pins.

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

ulation when in read mode. The oscillator is enabled when the OSCEN

pin is held high. If any of channels 2, 3, or 4 are active, the oscillator is

switched off. Complete control of amplitude and frequency is set by

two external resistors connected to ground at pins RFREQ and RAMP

(see graphs in this data sheet for further explanation).

The external I

set each amplifier transconductance by applying a voltage to each resis-

tor, without restriction on the voltage range, thus ensuring broad

voltage DAC compatibility. Alternatively, the I

from a current DAC or other current source.

Connection Diagram

OUT

resistors allow the user to accurately and independently

OUT

output, allowing the user to create multilevel wave-

IINR

IIN2

RFREQ

IIN3

IIN4

OUTEN2

OUTEN3

OUTEN4

OUT

ENABLE

OSCEN

RAMP

IOUT

GND

VCC

shutoff is also achieved by hold-

pin can be biased

pin (virtually

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