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EL6261C Product
EL6261C Product Brief
Quad 20MHz & Quad, 80MHz, Switched Gain Pre-Amp
Features
* Autozero of output offset to <10mV * 3 selectable gains; 8K, 15K, 40K * Space saving QSOP-24 package * Differential Sum & Sum-Bar outputs * Single 5V supply
General Description
The EL6261C consists of 4 20MHz trans-impedance amplifiers and 4 80MHz trans-impedance amplifiers. The four 80Mhz amplifier outputs also are averaged to provide differential 80MHz outputs. The EL6261C is designed to amplify the photo diode currents for CD, DVD, or other photo diode pick-up applications. Two TTL/CMOS compatible inputs select the gain for all eight amplifiers. The gain settings are 8K, 15K and 40K for all channels. The sum and sumbar outputs are 11K, 20K and 53K single ended. Gain matching is typically 3%, channel to channel. An autozero input brought high after power up reduces the output offsets to less than 10mV. The E,F,G,H channel bandwidths are 20MHz for all gains and reasonable input and output loads. The A,B,C,D,S,S channels have bandwiths of 80MHz, 45MHz, and 25MHz at low, middle, and high gains respectively. Each amplifier output can sink or source up to 5mA, and their outputs can swing 1Vp-p at full bandwidth. The EL6261C operates from a single +5V supply, and is available in QSOP-24 package. It is specified for operation from -0C to 70C
Applications
* * * * * * DVD RAM, R/W and ROM CD R/W, R and ROM MO drives Optical Pickup pre-amplifier Servo positioning systems High speed instrumentation
Ordering Information
Part No EL6261CU Temp. Range 0C to +70C Package QSOP-24 Outline # MDP0040
Connection Diagram
Gain 0 Select Gain 1 Select Ref Input A Input B Input C Input D Input 0V (VSS) E Input F Input G Input H Input
1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13
AZ Input Sum Output Sum Output A Output B Output C Output D Output +5V (VDD ) E Output F Output G Output H Output
24-Pin QSOP
December 3, 1999
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) 1998 Elantec, Inc.
EL6261C Product
EL6261C Product Brief
Quad 20MHz & Quad, 80MHz, Switched Gain Pre-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
December 3, 1999
Elantec, Inc.
1996 Tarob Court Milpitas, CA 95035 Telephone: (408) 945-1323 (800) 333-6314 Fax: (408) 945-9305 European Office: 44-71-482-4596
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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.

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