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FN7227.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Copyright Intersil Americas Inc. 2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
PRELIMINARY
EL6839
Dual 4-Channel Driver with Oscillator and
LVDS
The EL6839 is a high performance,
dual output, laser driver for writeable
DVD drives. The ENA pin enables the
chip, while the SEL1 pin selects the I
OUT
pin. Various
waveforms can be generated where the amplitude is
determined by the currents flowing into I
INR
, I
IN2
, I
IN3
, and
I
IN4
. The timing is determined by the signals at WEN2-
WEN2B, WEN3-WEN3B, and WEN4-WEN4B. The oscillator
is enabled when OSEN is high. The amplified I
INR
current of
the selected channel is enabled when the ENA pin is high.
The total output current is the sum of the read current, the
enabled write currents, and the oscillator current when
enabled.
Usually a voltage DAC will drive a resistor that is in series
with the I
INR
, I
IN2
, I
IN3
, and I
IN4
input. The resistor allows
the user to optimize the current gain for each channel.
WEN2-WEN2B, WEN3-WEN3B and WEN4-WEN4B are
LVDS input pins with 100
external termination. Output write
current pulses are enabled when a high is applied to the
WEN2-WEN2B, WEN3-WEN3B, or WEN4-WEN4B pin. The
write current will flow to the selected output. When SEL1 is
high I
OUT1
is selected. WENRB enables read and oscillator
current when low.
The RF oscillators frequency is determined by R
FREQ1
or
R
FREQ2
, and its amplitude by R
AMP1
or R
AMP2
.
Features
Two channels for CD or DVD
Voltage-controlled output current source requiring one
external set resistor per channel
LVDS interface
Rise time = 0.8ns
Fall time = 0.8ns
Channel 2 to 250mA max
Channel 3 to 150mA max
Channel 4 to 100mA max
External 100
LVDS termination
On chip oscillator with frequency and amplitude control by
use of external resistors to ground
Oscillator frequency to 600MHz
Oscillator amplitude to 100mA
P-P
Single +5V supply (10%)
Chip ENAs for power savings
Pb-free available
Applications
Super combo drives
DVD drives
Ordering Information
PART
NUMBER
TEMP. RANGE
PACKAGE
PKG. DWG. #
EL6839CL
32-Pin QFN
-
MDP0046
EL6839CL-T7
32-Pin QFN
7"
MDP0046
EL6839CL-T13
32-Pin QFN
13"
MDP0046
EL6839CLZ
(See Note)
32-Pin QFN
(Pb-free)
-
MDP0046
EL6839CLZ-T7
(See Note)
32-Pin QFN
(Pb-free)
7"
MDP0046
EL6839CLZ-
T13 (See Note)
32-Pin QFN
(Pb-free)
13"
MDP0046
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is compatible with both SnPb and
Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J Std-020B.
Data Sheet
July 15, 2004
Get FULL DATASHEET
2
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
EL6839
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