el6274c ETC-unknow, el6274c Datasheet
el6274c
Manufacturer Part Number
el6274c
Description
4-ch Laser Diode Driver Oscillator
Manufacturer
ETC-unknow
Datasheet
1.EL6274C.pdf
(2 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
el6274cU
Manufacturer:
ELAMTEC
Quantity:
2 000
Part Number:
el6274cU
Manufacturer:
INTERSIL
Quantity:
20 000
Company:
Part Number:
el6274cU-T13
Manufacturer:
IBM
Quantity:
8 726
Part Number:
el6274cU-T13
Manufacturer:
ELANTEC
Quantity:
20 000
Part Number:
el6274cV
Manufacturer:
ELANTEC
Quantity:
20 000
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.
© 2001 Elantec Semiconductor, Inc.
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
EL6274CU
Part No
source of 140mA per channel,
requiring one external set resistor
per channel
source of 140mA per channel
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 #
EL6274C - Product Brief
4-Ch Laser Diode Driver + Oscillator
General Description
The EL6274C is a four channel laser diode current amplifier that pro-
vides controlled current to a grounded laser diode. The four amplifiers
can provide 140mA per channel of DC or pulsed current. 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 by
100X 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 OUTEN 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
OUTENR
OUTEN2
OUTEN3
OUTEN4
RFREQ
GND
GND
GND
IINR
IIN2
IIN3
IIN4
OUT
10
11
12
1
2
3
4
5
6
7
8
9
output, allowing the user to create multi-
OUT
shutoff is also achieved by hold-
OUT
24
23
22
21
20
19
18
17
16
15
14
13
GND
VCC
VCC
IOUT
IOUT
GND
RAMP
ENABLE
OSCEN
VCC
VCC
GND
.
IN
pin can be biased
IN
pin
Related parts for el6274c
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
ETC-unknow
Datasheet:
Part Number:
Description:
Manufacturer:
ETC-unknow
Datasheet:
el6274c Summary of contents
Page 1
... EL6274C - Product Brief 4-Ch Laser Diode Driver + Oscillator General Description The EL6274C is a four channel laser diode current amplifier that pro- vides controlled current to a grounded laser diode. The four amplifiers can provide 140mA per channel pulsed current. Channels 2, 3, and 4 should be used as the write channels, with switching speeds of approximately three nanosecond rise/fall time ...
Page 2
... EL6274C - Product Brief 4-Ch Laser Diode Driver + Oscillator 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- cuitry or specifications contained herein at any time without notice. Elantec, Inc. assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement ...