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| EL6241C - Product Brief EL6241C - Product Brief Dual Laser Driver with APC Amp Features * Read + 2 write channel laser driver with oscillator and fast I/V amplifier plus a separate ROM laser driver with oscillator * 200V/s I/V amplifier * 100X gain, 100mA low noise read channel * 250X gain, 250mA and 150X gain, 150mA write channels * 500MHz, 100mAP-P oscillator * Write rise/fall times = 0.8ns * Single +5V supply * Auto-oscillator on-off with OUTEN signals General Description The EL6241C is a combination read + 2 write level laser driver and IV amplifier, with an extra read + oscillator ROM channel for use in duallaser `combo' drivers. A separate (amplitude and frequency) oscillator modulates the selected output for laser noise reduction during read or write. All these functions are provided in a 24-lead QSOP package. The CD pin, when high, selects the CD (write) laser. Positive current supplied to the IIN lines, through a user selected resistor, allow the full scale range of each amplifier to be matched to the full scale range of the users control DACs. When the write laser is selected, and the WEN pins are switched low, the respective current is summed to the output with 1ns rise and fall times. The 100mAP-P (max) oscillator is switched on when both OSCEN and OUTEN pins are high. The CD line allows the oscillator to operate at different amplitudes and frequencies for each laser. The entire chip is powered down when ENABLE is low. The user can define the gain of the I/V amplifier. With a slew rate of 200V/s, the I/V amplifier can normally settle to 1% within 30ns. Applications * * * * Combo CD-RW + DVD-ROM CD-RW to 16X CD-R to 32X Writable optical disk drives Connection Diagrams 1 VOUT PDIN 24 23 VREF 21 PDIN 24 IINR 20 VCC 19 VCC 18 IOUT1 17 GND Thermal Pad 16 GND 15 RAMP1 14 RAMP2 VDD 23 VDD 22 IOUT1 21 GND 20 GND 19 RAMP1 18 RAMP2 17 ENABLE 16 OSCEN 15 IOUT2 14 VDD 13 IIN2 1 RF1 2 IIN3 3 GND 4 RF2 5 WEN2 6 CD 7 VCC 10 IOUT2 11 OSCEN 12 WEN3 8 NC 9 22 VOUT Ordering Information Part No EL6241CU EL6241CL Temp Range -40C to+ 85C -40C to+ 85C Package 24-Pin QSOP 24-Pin LPP Outline # MDP0040 MDP0046 2 VREF 3 IINR 4 IIN2 5 RF1 6 IIN3 7 GND 8 RF2 9 WEN2 10 CD 11 WEN3 12 NC October 25, 2001 13 ENABLE 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. (c) 2001 Elantec Semiconductor, Inc. EL6241C - Product Brief EL6241C - Product Brief Dual Laser Driver with APC Amp 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 circuitry 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. WARNING - Life Support Policy Elantec, Inc. products are not authorized for and should not be used within Life Support Systems without the specific written consent of Elantec, Inc. Life Support systems are equipment intended to support or sustain life and whose failure to perform when properly used in accordance with instructions provided can be reasonably expected to result in significant personal injury or death. Users contemplating application of Elantec, Inc. Products in Life Support Systems are requested to contact Elantec, Inc. factory headquarters to establish suitable terms & conditions for these applications. Elantec, Inc.'s warranty is limited to replacement of defective components and does not cover injury to persons or property or other consequential damages. Printed in U.S.A. October 25, 2001 Elantec Semiconductor, Inc. 675 Trade Zone Blvd. Milpitas, CA 95035 Telephone: (408) 945-1323 (888) ELANTEC Fax: (408) 945-9305 European Office: +44-118-977-6020 Japan Technical Center: +81-45-682-5820 2 |
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