EL2120 Просмотр технического описания (PDF) - Intersil
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EL2120 Datasheet PDF : 12 Pages
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Typical Performance Curves (Continued)
Enable Response for
a Family of Inputs
EL2120
Disable Response for
a Family of Inputs
AV = +2, RL = 150Ω,
VS = ±5V
Supply Current vs
Supply Voltage
AV = +2, RL = 150Ω,
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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