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.

© 2000 Elantec Semiconductor, Inc.

Features

• Shrink-Small Outline Package

• Voltage-controlled output current

source to 200mA per channel,

requiring one external set resistor

per channel

• Current-controlled output current

source to 200mA per channel

• Rise time = 0.8ns

• Fall time = 0.8ns

• On chip oscillator with frequency

and amplitude control by use of

external resistors to ground

• Oscillator to 500MHz

• Oscillator to 100mA pk/pk

• Single +5V supply (±10%)

• Disable feature for power-up

protection and power savings

• Fast Settling APC Amplifier

Applications

• CD-RW applications

• Writable optical drives

• Laser diode current switching

Ordering Information

Part No

Temp. Range

Package

Outline #

EL6283CU

0°C to +70°C

QSOP-16

MDP0041

General Description

The EL6283C is a high-performance three channel laser driver that

provides controlled current to a grounded laser diode. Write channels

2 and 3 can provide up to 200mA per channel of DC or pulsed current,

with switching speeds of approximately one nanosecond rise/fall time.

the user to create multilevel waveforms 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

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

modulation when in any mode. This is turned on when the OSCEN pin

is held high. 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).

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

holding the ENABLE pin low, which will override all other control

pins.

The EL6283C also includes a fast settling APC amplifier designed to

interface directly with the front end monitor diode and the sample-

and-hold amplifier for read and write power control. Its 100MHz

bandwidth and 30ns settling time enable up to 16X CD-RW design.

Connection Diagram

1

2

3

4

16

15

14

13

5

6

7

12

11

10

8

9

VREF

VCC

IINR

IOUT

RFREQ

GND

IIN2

ENABLE

IIN3

RAMP

OUTEN3

OSCEN

OUTEN2

VCC

VOUT

PDIN

EL6283C - Product Brief

3-Channel Laser Diode Driver w/Oscillator & APC Amplifier