ELANT EL6263CU Datasheet

EL6263C - Product Brief

Quad 20MHz & Quad 70MHz, Switched Gain Pre-Amp

EL6263C - Product Brief

Features

• Autozero of output offset to <10mV

• 3 selectable gains

• Space-saving QSOP-24 package

• Differential Sum & Sum-Bar outputs

• Single 5V supply

Applications

• DVD RAM, RW, and ROM

• CD RW, R and ROM

• MO drives

• Optical Pickup pre-amplifier

• Servo positioning systems

• High speed instrumentation

Ordering Information

Part No Package Tape & Reel Outline #

EL6263CU 24-Pin QSOP MDP0040

General Description

The EL6263C consists of four 30MHz trans-impedance amplifiers and four 70MHz trans-impedance amplifiers. The four 70MHz amplifier outputs also are averaged to provide differential 70MHz outputs.

The EL6263C is designed to amplify the photodiode currents for CD, DVD, or other photodiode pick-up applications.

Two TTL/CMOS-compatible select the gains for all eight amplifiers.

The gain settings for the fast amplifiers are 5.4kΩ, 10.7kΩ, and

28.6kΩ. The gain settings for the slow amplifiers are 13.3kΩ, 25kΩ, and 66.7kΩ. The gain settings for the sum and sumbar outputs are

7.6kΩ, 14.3kΩ, and 38.1kΩ measured single-ended. Gain matching is

typically 3% channel to channel. The autozero input reduces each amplifier’s output offset to less than 10mV when it goes high. The AZ pin is TTL/CMOS-compatible.

The E, F, G, and H channel bandwidths are 30MHz for all gains and reasonable input and output loads. The A, B, C, D, S, and S channels have bandwidths of 70MHz, 46MHz, and 40MHz at low, middle, and high gains respectively after driving 25cm of flex circuit.

Each amplifier output can typically sink or source up to 5mA and their outputs can swing 1V

at full bandwidth.

P-P

The EL6263C operates from a single +5V supply and is available in

QSOP-24 package. It is specified for operation from -0°C to 70°C.

Connection Diagram

A INPUT

B INPUT

C INPUT

D INPUT

0V (VSS)

E INPUT

F INPUT

G INPUT

H INPUT

GAIN 0 SELECT

GAIN 1 SELECT

REF INPUT

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.

AZ INPUT

SUM OUTPUT

A OUTPUT

B OUTPUT

C OUTPUT

D OUTPUT

+5V (VDD)

E OUTPUT

F OUTPUT

G OUTPUT

H OUTPUT

October 12, 2000

EL6263C - Product Brief

Quad 20MHz & Quad 70MHz, Switched Gain Pre-Amp

EL6263C - Product Brief

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 sup-

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

port 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.

October 12, 2000

Printed in U.S.A.