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Part Number: EL6934A

 

 

 

 

Description: The EL6934A is a highly integrated laser diode driver designed to support multi-standard writable optical ...


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EL6934A General Description


   The EL6934A is a highly integrated laser diode driver designed to support multi-standard writable optical drives. It accomplishes this by incorporating a waveform generator wherein the diode currents and timing details can be programmed before operation. The data input circuitry inspects the NRZ serial data waveform and generates programmed waveforms in recognition of 3, 4, 5, or 6 or more clock periods of space changing to 3, 4, 5, or 6 or more clock periods of mark, and vice versa.

   The architecture allows reprogramming of the timers to support different media, Blue, DVD, or CD standards, and different speeds. The programming is accomplished through a serial interface port. Two outputs are provided to support dual-laser multi-standard optical heads. The clock and NRZ inputs can be either standard CMOS or LVDS, selectable through a program bit.

   The EL6934A requires 2.5V and 5V supplies, with all the logical interface operating on the 2.5V supply.

EL6934A Features

• Complete programmable laser diode driver
• 450mA maximum total output
• 10-bit x 10-bit multiplying DAC output provides 10-bit full scale adjustment and 10-bit resolution at any full scale output
• 60 psec timer resolution
• Two laser outputs allows read/write DVD and CD combinations
• Programmable waveform values support CD-R, CD-RW,DVD-RAM, DVD-R, DVD-RW, DVD+R, DVD+RW, and Blue
• Two analog inputs support slope and read APC
• HFM oscillator programmable to 100mAP-P from 100MHz to 500MHz
• PLL allows reduced-frequency clock on flex cable
• Separate serial input works up to 100MHz
• Programmable HFM offset when HFM is off
• Pb-free available

EL6934A Typical Application

• Combination DVD writable and CD writable drives
• DVD camcorders
• DVD video recorders

EL6934A datasheet

EL6934A
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