www.fairchildsemi.com
KH220
Fast Settling Wideband Op Amp
Features
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General Description
The KH220 is a wide bandwidth DC-coupled operational
amplifier that defines the state-of-the-art in high
speed op amps. A -3dB bandwidth of DC to 190MHz
is achieved using a current feedback architecture
design. Ultra-fast settling time (8nsec to 0.1%) and
slew rate (7000V/碌sec) make the KH220 a superior
amplifier for pulsed and digital applications.
Since thermal tail has been eliminated, the KH220
settles fast and remains solidly at the desired level.
Flat gain and linear phase (1.2擄 deviation from linear)
from DC to beyond 100MHz help the KH220 to
achieve distortion levels uncommonly low relative to
conventional op amps.
Using the KH220 is as easy as adding power supplies
and a gain-setting resistor. The result is reliable,
consistent performance because such characteristics as
bandwidth and settling time are virtually independent
of gain setting. Unlike conventional op amp designs
where the optimum gain-bandwidth product occurs
at a high gain, minimum settling time at a gain of -1,
maximum slew rate at a gain of +1, et cetera, the
KH220 offers predictable response at gain settings
from 鹵1 to 鹵50. This, coupled with consistent perfor-
mance from unit to unit with no external
compensation, makes the KH220 a real time and cost-
saver in design and production situations alike.
This combination of features makes the KH220
appropriate for a broad range of applications. The
wide bandwidth, DC coupling, and fast settling lend
themselves well to high speed D to A and 鈥渇lash鈥?A to
D applications. Both receivers and transmitters in
optical fiber systems have similar requirements. High
gain and phase linearity and corresponding low
distortion make the KH220 ideal for many digital
communication system applications, such as in the
demodulator, where the need for both DC coupling
and high frequency amplification creates require-
ments that are difficult to meet.
The KH220 is constructed using thin film resistor/bipolar
transistor technology, and available in these versions:
-3dB bandwidth of 190MHz
0.1% settling in 8ns
7000V/碌s slew rate
1.9ns rise and fall times
Low distortion, linear phase
Direct replacement for CLC220
Applications
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Very high-speed A to D, D to A conversion
High-speed fiber optic systems
Baseband and video communications
Radar and IF processors
Very fast risetime pulse amplifiers
Bottom View
Typical Performance
KH220AI
KH220AK
KH220AM
-25擄C to +85擄C
-55擄C to +125擄C
-55擄C to +125擄C
KH220HXC
KH220HXA
-55擄C to +125擄C
-55擄C to +125擄C
12-pin TO-8 can
12-pin TO-8 can, features
burn-in & hermetic testing
12-pin TO-8 can,
environmentally
screened and electrically
tested to MIL-STD-883
SMD#: 5962-8991101HXC
SMD#: 5962-8991101HXA
REV. 1A February 2001
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