EL2120CS Elantec Inc, EL2120CS Datasheet

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EL2120CS

Manufacturer Part Number
EL2120CS
Description
100MHz current feedback amplifier
Manufacturer
Elantec Inc
Datasheet

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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
1991 Elantec Inc
Features
Applications
Ordering Information
Connection Diagrams
EL2120CN 0 C to
EL2120CS
Part No
Excellent differential gain and
phase on
100 MHz
gains of
700 V
0 1 dB flatness to 20 MHz
Output disable in 50 ns - remains
high impedance even when
driven with large slew rates
Single
AC characteristics are lot and
temperature stable
Available in small SO-8 package
Video gain block
Residue amplifier
Multiplexer
Current to voltage converter
Coax cable driver with gain of 2
ADC driver
Temp Range
0 C to
a
s slew rate
g
5V supply operation
g
b
1 to
a
a
Top View
P-DIP
5V to
3 dB bandwidth from
75 C
75 C
SO
g
10
8-Pin P-DIP MDP0031
8-Lead SO
g
Package
15V supplies
Outline
MDP0027
2120 – 1
2120 – 2
EL2120C
100 MHz Current Feedback Amplifier
General Description
The EL2120C is a wideband current feedback amplifier opti-
mized for video performance Its 0 01% differential gain and
0 03 degree differential phase performance when at
plies exceeds the performance of other amplifiers running on
tortions to 0 01% and 0 01 degrees and below The EL2120C can
operate with supplies as low as
Being a current feedback design bandwidth is a relatively con-
stant 100 MHz over the
has been optimized for flat gain over frequency and all charac-
teristics are maintained at positive unity gain Because the in-
put slew rate is similar to the 700 V
part makes an excellent high-speed buffer
The EL2120C has a superior output disable function Time to
enable or disable is 50 ns and does not change markedly with
temperature Furthermore in disable mode the output does not
draw excessive currents when driven with 1000 V
The output appears as a 3 pF load when disabled
Simplified Schematic
g
15V supplies Operating on
g
1 to
g
8 to
g
g
2 5V or a single
10 gain range The EL2120C
g
15V supplies reduces dis-
s output slew rate the
a
s slew rates
5V supply
g
5V sup-
2120 –21

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EL2120CS Summary of contents

Page 1

... Current to voltage converter Coax cable driver with gain of 2 ADC driver Ordering Information Part No Temp Range Package Outline EL2120CN 8-Pin P-DIP MDP0031 a EL2120CS 8-Lead SO MDP0027 a Connection Diagrams P-DIP 2120 – 2120 – 2 Top View 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 ...

Page 2

EL2120C 100 MHz Current Feedback Amplifier Absolute Maximum Ratings Voltage between V and Voltage OUT Voltage between IN and Voltage ...

Page 3

Open Loop DC Electrical Characteristics 150 unless otherwise specified Parameter Description V V Range Output Voltage Swing O I Output Short-Circuit SC Current ...

Page 4

EL2120C 100 MHz Current Feedback Amplifier Closed Loop AC Electrical Characteristics V 15V 270 ) Parameter Description dG Differential Gain DC Offset from ...

Page 5

Typical Performance Curves Gain Flatness Bandwidth Bandwidth b and Peaking vs Temperature at V 15V Bandwidth Bandwidth and Peaking vs Supply Voltage 100 MHz ...

Page 6

EL2120C 100 MHz Current Feedback Amplifier Typical Performance Curves Differential Gain vs DC Input Offset MHz Differential Gain vs DC Input Offset at 30 MHz Differential Gain and Phase vs Supply Voltage (V DC from 0 to ...

Page 7

Typical Performance Curves Undistorted Output Swing vs Frequency Small-Signal Transient Response 270 150 e L Settling Time vs Swing 100 MHz Current Feedback Amplifier Contd Slew Rate vs ...

Page 8

EL2120C 100 MHz Current Feedback Amplifier Typical Performance Curves Enable Response for a Family of Inputs 150 Supply Current vs Supply Voltage Contd Disable Response for a ...

Page 9

Applications Information The EL2120C represents the third generation of current-feedback amplifier design It is designed to provide good high-frequency performance over wide supply voltage load impedance gain tem- perature and manufacturing lot variations well-behaved amplifier in spite ...

Page 10

EL2120C 100 MHz Current Feedback Amplifier Applications Information When the EL2120C disables it turns off very rapidly for inputs of more slowly for inputs larger than this For inputs as large as absorbed by another EL2120C simultaneously enabled Under these ...

Page 11

The EL2120C Macromodel This macromodel has been developed to assist the user in simulating the EL2120C with surrounding circuitry It was developed for the PSPICE simulator (copywritten by the Microsim corporation) and may need to be rearranged for other simulators ...

Page 12

... The EL2120C Macromodel 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 ...

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