ELANT EL6262CU Datasheet

EL6262C - Product Brief

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

EL6262C - Product Brief

Features

• Autozero of output offset to
<10mV

• 3 selectable gains; 8KΩ, 15KΩ,
40KΩ

• 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 Temp. Range Package Outline #

EL6262CU 0°C to +70°C 24-Lead QSOP MDP0040

General Description

The EL6262C consists of 4 20MHz trans-impedance amplifiers and 4
70MHz trans-impedance amplifiers. The four 70MHz amplifier out­puts also are averaged to provide differential 70MHz outputs.

The EL6262C 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 ampli-

fiers. The gain settings are 8KΩ, 15KΩ, and 40KΩ for all channels.
The sum and sumbar outputs are 11KΩ, 20KΩ, and 45KΩ 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, and H channel bandwidths are 20MHz for all gains and
reasonable input and output loads. The A, B, C, D, S, and S channels
have bandwidths of 70MHz, 46MHz, and 32MHz 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 EL6262C 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

GAIN 0 SELECT

1

24

AZ INPUT

A INPUT

B INPUT

C INPUT

D INPUT

0V (VSS)

E INPUT

F INPUT

G INPUT

H INPUT

2

3

4

5

6

7

8

9

10

11

12

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.

© 2001 Elantec Semiconductor, Inc.

23

SUM OUTPUT

22

SUM OUTPUT

21

A OUTPUT

20

B OUTPUT

19

C OUTPUT

18

D OUTPUT

17

+5V (VDD)

16

E OUTPUT

15

F OUTPUT

14

G OUTPUT

13

H OUTPUT

June 8, 2000

EL6262C - Product Brief

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

EL6262C - 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: [phone]

(888) ELANTEC
Fax: [phone]
European Office: [phone]
Japan Technical Center: [phone]

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.

June 8, 2000

2

Printed in U.S.A.