EL6245CU Elantec Inc, EL6245CU Datasheet

EL6245CU

Manufacturer Part Number

EL6245CU

Description

Manufacturer

Elantec Inc

Datasheets

1.EL6245CU.pdf (2 pages)

2.EL6245CU.pdf (2 pages)

Specifications of EL6245CU

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Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

EL6245CU

Manufacturer:

ELANTEC

Quantity:

1 200

Company:

Meier Automation Equipment Co., Limited

Part Number:

EL6245CU

Manufacturer:

ELANTEC

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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%)

• Disable feature for power-up

• Fast Settling APC Amplifier

• CD-RW applications

• Writable optical drives

• Laser diode current switching

EL6245CU

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

MDP0041

Outline #

EL6245C - Product Brief

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

General Description

The EL6245C is a high-performance three channel laser driver that

provides controlled current to a grounded laser diode. Channels 2 and

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

approximately one nanosecond rise/fall time. All three 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 only when the

OSCEN and OUTEN pins are held high. Complete control of ampli-

tude 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

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

pins.

The EL6245C 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

OUT

VOUT

VREF

IINR

IIN2

IIN3

RFREQ

OUTEN3

OUTEN2

output, allowing the user to create multi-

OUT

ENABLE

OSCEN

RAMP

PDIN

IOUT

GND

VCC

shut-off is also achieved by

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