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.
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General Description
The EL4120C and EL4320C are single channel and triple channel DC-
restore amplifiers, respectively. They exhibit a -3dB bandwidth of
500MHz and operate on just 11mA per channel. When the DC-restore
is active, they exhibit a typical offset of just 1mV. This makes the
EL4120C and EL4320C ideal for use in offset correction in both ana-
log and A-to-D applications.
The hold capacitor, feedback, and generator resistors are external. The
hold pin uses standard TTL logic and is referenced to the GNDL pin.
The EL4120C is available in the 16-pin QSOP package and the
EL4320C in a 28-pin QSOP package. All parts are specified for oper-
ation over the -40C to +85C temperature range.
Connection Diagram
DCREF2
CAP2
ENB
GNDL
VIDEO_IN3
DCREF3
CAP3
NC
HOLD
VOUT2
DCFDBK2
VS-
VFDBK3
VS-
VOUT3
DCFDBK3
EL4320C
(28-Pin QSOP)
1
2
3
4
16
15
14
13
5
6
7
12
11
9
8
10
20
19
18
17
24
23
22
21
28
27
26
25
NC
CAP1
DCREF1
VIDEO_IN1
GNDI
VIDEO_IN2
DCFDBK1
VOUT1
VS1+
VFDBK1
VS2+
VFDBK2
-
+
-
+
-
+
-
+
-
+
-
+
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2
3
4
16
15
14
13
5
6
7
12
11
10
8
9
NC
CAP
DCREF
VIDEO_IN
GNDI
VS-
ENB
NC
DCFDBK
VOUT
VS1+
VFDBK
VS2+
VS-
GNDL
HOLD
EL4120C
(16-Pin QSOP)
-
+
-
+
Features
Single and triple channels
Single 5V and 5V operation
500MHz bandwidth
1500V/s slew rate
Supply current of 11mA/channel
Power-down mode
1mV typical DC-restored offset
Applications
HDTV/DTV analog inputs
Video projectors
Computer monitors
Set top boxes
Broadcast video equipment
Ordering Information
Part No.
Package
Tape & Reel
Outline #
EL4120CU
16-Pin QSOP
MDP0040
EL4320CU
28-Pin QSOP
MDP0040
EL4120C, EL4320C - Product Brief
500MHz DC-Restore Amplifier
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EL4120C, EL4320C - Product Brief
500MHz DC-Restore Amplifier
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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 cir-
cuitry 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-
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 con-
templating 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. Elan-
tec, Inc.'s warranty is limited to replacement of defective
components and does not cover injury to persons or property or
other consequential damages.
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Printed in U.S.A.
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
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