EL6275CU Intersil Corporation, EL6275CU Datasheet

EL6275CU

Manufacturer Part Number

EL6275CU

Description

Manufacturer

Intersil Corporation

Datasheet

1.EL6275CU.pdf (2 pages)

Specifications of EL6275CU

Case

SSOP16

Date_code

9920/0023

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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

• Current-controlled output current

• Rise time = 3.0ns

• Fall time = 3.5ns

• 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

• CD-RW applications

• Writable optical drives

• Laser diode current switching

EL6275CU

source requiring one external set

resistor per channel

source

and amplitude control by use of

external resistors to ground

protection and power savings

Part No

QSOP-16

Package

Tape & Reel

MDP0040

Outline #

EL6275C - Product Brief

4-Channel Laser Diode Driver + Oscillator

General Description

The EL6275C 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

approximately three nanosecond rise/fall time. All four channels are

summed together at the I

level 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 a current at the I

(virtually ground). The current seen at this pin is then amplified to

become a current source at pin I

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

float high when open. Complete I

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

The external resistors allow the user to accurately and independently

set each amplifier transconductance by applying a voltage to each

resistor, 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

IINR

IIN2

RFREQ

IIN3

IIN4

OUTEN2

OUTEN3

OUTEN4

output, allowing the user to create multi-

OUT

ENABLE

OSCEN

shutoff is also achieved by hold-

RAMP

IOUT

GND

VCC

pin can be biased

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