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EL2120CN 데이터시트 PDF




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부품번호 EL2120CN 기능
기능 100MHz Current Feedback Amplifier
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EL2120CN 데이터시트, 핀배열, 회로
®
Data Sheet
January 1996, Rev E
EL2120
FN7044
100MHz Current Feedback Amplifier
The EL2120 is a wideband current
feedback amplifier optimized for video
performance. Its 0.01% differential
gain and 0.03 degree differential phase performance when
at ±5V supplies exceeds the performance of other amplifiers
running on ±15V supplies. Operating on ±8 to ±15V supplies
reduces distortions to 0.01% and 0.01 degrees and below.
The EL2120 can operate with supplies as low as ±2.5V or a
single +5V supply.
Being a current feedback design, bandwidth is a relatively
constant 100MHz over the ±1 to ±10 gain range. The
EL2120 has been optimized for flat gain over frequency and
all characteristics are maintained at positive unity gain.
Because the input slew rate is similar to the 700V/µs output
slew rate the part makes an excellent high-speed buffer.
The EL2120 has a superior output disable function. Time to
enable or disable is 50ns and does not change markedly
with temperature. Furthermore, in disable mode the output
does not draw excessive currents when driven with
1000V/µs slew rates. The output appears as a 3pF load
when disabled.
Simplified Schematic
Features
• Excellent differential gain and phase on ±5V to ±15V
supplies
• 100MHz -3dB bandwidth from gains of ±1 to ±10
• 700V/µs slew rate
• 0.1dB flatness to 20MHz
• Output disable in 50ns - remains high impedance even
when driven with large slew rates
• Single +5V supply operation
• AC characteristics are lot and temperature stable
• Available in small SO-8 package
Applications
• Video gain block
• Residue amplifier
• Multiplexer
• Current to voltage converter
• Coax cable driver with gain of 2
• ADC driver
Ordering Information
PART
NUMBER TEMP. RANGE
EL2120CN 0°C to +75°C
EL2120CS 0°C to +75°C
PACKAGE
8-Pin PDIP
8-Pin SO
Pinouts
PKG. NO.
MDP0031
MDP0027
EL2120
(8-PIN PDIP)
TOP VIEW
EL2120
(8-PIN SO)
TOP VIEW
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.




EL2120CN pdf, 반도체, 판매, 대치품
Typical Performance Curves (Continued)
Gain Flatness vs RF
EL2120
Gain Flatness vs CIN-
-3dB Bandwidth, 0.1dB Bandwidth,
and Peaking vs Temperature
at VS ±15V
-3dB Bandwidth, 0.1dB Bandwidth,
and Peaking vs Temperature
at VS ±5V
-3dB Bandwidth, 0.1dB Bandwidth,
and Peaking vs Supply Voltage
Deviation From Linear
Phase vs Frequency
4

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EL2120CN 전자부품, 판매, 대치품
Typical Performance Curves (Continued)
Enable Response for
a Family of Inputs
EL2120
Disable Response for
a Family of Inputs
AV = +2, RL = 150,
VS = ±5V
Supply Current vs
Supply Voltage
AV = +2, RL = 150,
VS = ±5V
8-Pin Plastic DIP
Maximum Power Dissipation
vs Ambient Temperature
8-Pin SO
Maximum Power Dissipation
vs Ambient Temperature
Applications Information
The EL2120 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, temperature, and manufacturing lot
variations. It is a well-behaved amplifier in spite of its
100MHz bandwidth, but a few precautions should be taken
to obtain maximum performance.
The power supply pins must be well bypassed. 0.01µF
ceramic capacitors are adequate, but lead length should be
kept below 1/4” and a ground plane is recommended.
Bypassing with 4.7µF tantalum capacitors can improve
7
settling characteristics, and smaller capacitors in parallel will
not be needed. The lead length of sockets generally
deteriorates the amplifier's frequency response by
exaggerating peaking and increasing ringing in response to
transients. Short sockets cause little degradation.
Load capacitance also increases ringing and peaking.
Capacitance greater than 35pF should be isolated with a
series resistor. Capacitance at the VIN- terminal has a
similar effect, and should be kept below 5pF. Often, the
inductance of the leads of a load capacitance will be self-
resonant at frequencies from 40MHz to 200MHz and can
cause oscillations. A resonant load can be de-Q'ed with a
small series or parallel resistor. A “snubber” can sometimes

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