el2130 Intersil Corporation, el2130 Datasheet - Page 7

• Manufacturer Part Number: el2130
• Description: 85mhz Current Feedback Amplifier
• Manufacturer: Intersil Corporation

Applications Information
Power Supply Bypassing
The EL2130 will exhibit ringing or oscillation if the power
supply leads are not adequately bypassed. 0.1PF ceramic
disc capacitors are suggested for both supply pins at a
distance no greater than 1/2 inch from the device. Surface
mounting chip capacitors are strongly recommended.
Lead Dress
A ground plane to which decoupling capacitors and gain
setting resistors are terminated will eliminate overshoot and
ringing. However, the ground plane should not extend to the
vicinity of both the non-inverting and inverting inputs (pins 3
and 2) which would add capacitance to these nodes, and
lead lengths from these pins should be made as short as
possible.
Use of sockets, particularly for the SO package, should be
avoided if possible. Sockets add parasitic inductance and
capacitance which will result in peaking and overshoot.
Video Characteristics and Applications
Frequency domain testing is performed at Elantec using a
computer controlled HP model 8656B Signal Generator and
an HP Model 4195A Network/Spectrum Analyzer. The DUT
test board is built using microwave/strip line techniques, and
solid coaxial cables route the stimulus to the DUT socket.
Signals are routed to and from the DUT test fixture using
subminiature coaxial cable.
Differential Gain and Phase are tested at a noise gain of 2
with 100: load. Gain and Phase measurements are made
with a DC input reference voltage at 0V and compared to
those made at V
to 30MHz.
The EL2130 is capable of driving 100: to a minimum of 2.5V
peak which means that it can naturally drive double
terminated (50:) coaxial cables.
Capacitive Loads
As can be seen from the Bode plot, the EL2130 will peak into
capacitive loads greater than 20pF. In many applications
such as flash A/Ds, capacitive loading is unavoidable. In
these cases, the use of a snubber network consisting of a
100: resistor in series with 47pF capacitor from the output
to ground is recommended.
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
REF
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
equal to 0.7V at frequencies extending
For information regarding Intersil Corporation and its products, see www.intersil.com
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EL2130
Equivalent Circuit
AC Test Circuit