EL6834
®
Data Sheet
July 15, 2004
FN7238.1
PRELIMINARY
Dual 4-Channel Driver with Oscillator &
LVDS
Features
• Two channels for CD or DVD
The EL6834 is a high performance,
dual output, laser driver for writeable
• Voltage-controlled output current source requiring one
external set resistor per channel
‘super-combo’ CD - DVD drives. The
ENA pin enables the chip, while the SEL1 pin selects the
• Rise time = 0.8ns
I
pin. Various waveforms can be generated where the
• Fall time = 0.8ns
OUT
amplitude is determined by the currents flowing into I
,
INR
• Channel 2 to 250mA max
• Channel 3 to 150mA max
• Channel 4 to 100mA max
I
, I , and I . The timing is determined by the signals
IN2 IN3 IN4
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.
• On chip oscillator with frequency and amplitude control by
use of external resistors to ground
• Oscillator frequency to 600MHz
Usually a voltage DAC will drive a resistor that is in series
• Internal 100Ω LVDS termination
with the I
, I , I , and I
input. The resistor allows
INR IN2 IN3
IN4
• Oscillator amplitude to 100mA
• Single +5V supply (±10%)
• Chip ENAs for power savings
• Pb-free available
P-P
the user to optimize the current gain for each channel.
Output write current pulses are enabled when a high is
applied to the WEN2-WEN2B, WEN3-WEN3B, or WEN-
WEN4B pin. The write current will flow to the selected
output. When SEL1 is high I
is selected. WENRB
OUT1
enables read and oscillator current when low.
Applications
• Super combo drives
The R oscillators frequency is determined by R
F
FREQ2
or
FREQ1
.
R
, and its amplitude by R
or R
AMP1 AMP2
Ordering Information
PART
NUMBER
EL6834CL
PACKAGE
32-Pin QFN
32-Pin QFN
32-Pin QFN
TAPE & REEL PKG. DWG. #
-
7”
13”
-
MDP0046
MDP0046
MDP0046
MDP0046
EL6834CL-T7
EL6834CL-T13
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EL6834CLZ
(See Note)
32-Pin QFN
(Pb-free)
EL6834CLZ-T7
(See Note)
32-Pin QFN
(Pb-free)
7”
MDP0046
MDP0046
EL6834CLZ-
T13 (See Note)
32-Pin QFN
(Pb-free)
13”
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.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
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