EL2120C
100 MHz Current Feedback Amplifier
Features
# Excellent differential gain and
General Description
The EL2120C is a wideband current feedback amplifier opti-
mized for video performance. Its 0.01% differential gain and
g
0.03 degree differential phase performance when at 5V sup-
plies exceeds the performance of other amplifiers running on
g
g
phase on 5V to 15V supplies
b
# 100 MHz 3 dB bandwidth from
g
g
gains of 1 to 10
g
g
g
15V supplies. Operating on 8 to 15V supplies reduces dis-
tortions to 0.01% and 0.01 degrees and below. The EL2120C can
# 700 V/ms slew rate
# 0.1 dB flatness to 20 MHz
a
operate with supplies as low as 2.5V or a single 5V supply.
g
# Output disable in 50 ns - remains
high impedance even when
driven with large slew rates
Being a current feedback design, bandwidth is a relatively con-
g
g
stant 100 MHz over the 1 to 10 gain range. The EL2120C
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/ms output slew rate the
part makes an excellent high-speed buffer.
a
# Single 5V supply operation
# AC characteristics are lot and
temperature stable
# Available in small SO-8 package
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/ms slew rates.
The output appears as a 3 pF load when disabled.
Applications
# Video gain block
# Residue amplifier
# Multiplexer
# Current to voltage converter
# Coax cable driver with gain of 2
# ADC driver
Simplified Schematic
Ordering Information
Package
Ý
Outline
Part No. Temp. Range
a
EL2120CN 0 C to 75 C
8-Pin P-DIP MDP0031
§
§
a
EL2120CS 0 C to 75 C
8-Lead SO
MDP0027
§
§
Connection Diagrams
P-DIP
2120–1
SO
2120–21
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
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.
ELANTEC [ ELANTEC SEMICONDUCTOR ]
