DATASHEET

EL6835
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Data Sheet
April 6, 2006
FN7231.1
Dual 4-Channel DVD, 3-Channel CD Driver
with Oscillator & LVDS
Features
The EL6835 is a high performance, dual output, laser driver
for writeable ‘super-combo’ CD - DVD drives. The ENA pin
enables the chip, while the SEL1 pin selects the IOUT pin.
Various waveforms can be generated where the amplitude is
determined by the currents flowing into IINR, IIN2, IIN3, and
IIN4. The timing is determined by the signals at WEN2WEN2B, WEN3-WEN3B, and WEN4-WEN4B. The oscillator
is enabled when OSCEN is high. The amplified IINR 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.
• Voltage-controlled output current source requiring one
external set resistor per channel
Usually a voltage DAC will drive a resistor that is in series
with the IINR, IIN2, IIN3 and IIN4 input. The resistor allows 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 WENWEN4B pin. The write current will flow to the selected
output. When SEL1 is high IOUT1 is selected. WENRB
enables read and oscillator current when low.
• Rise time = 0.8ns
• Fall time = 0.8ns
• DVD - Channel 2 to 275mA max
• DVD - Channel 3 to 195mA max
• DVD - Channel 4 to 115mA max
• CD - Channel 2 to 405mA max
• CD - Channel 3 to 290mA max
• On-chip oscillator with frequency and amplitude control by
use of external resistors to ground
• Oscillator frequency to 600MHz
• Oscillator amplitude to 100mAP-P
• Single +5V supply (±10%)
• Chip ENAs for power savings
• External LVDS termination
• Pb-Free plus anneal available (RoHS compliant)
The RF oscillators frequency is determined by RFREQ1 or
RFREQ2, and its amplitude by RAMP1 or RAMP2.
Applications
• Super combo drives
Ordering Information
PART
MARKING
PACKAGE
(Pb-Free)
TAPE
&
REEL
PKG.
DWG. #
EL6835CLZ
6835CLZ
32-Pin QFN
-
MDP0046
EL6835CLZ-T13
6835CLZ
32-Pin QFN
13”
MDP0046
EL6835CLUZ
32-Pin TEP-QFN
-
XX
EL6835CLUZ-T13
32-Pin TEP-QFN
13”
XX
PART NUMBER
(See Note)
• Two channels for CD or DVD
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100% matte
tin plate termination finish, which are RoHS compliant and 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-020.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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EL6835
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2
FN7231.1
April 6, 2006
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