www.fairchildsemi.com
KE Series
Encased Amplifiers
Features
General Description
The KE Series amplifiers are designed to take full
advantage of Fairchild’s high-performance DC-
coupled operational amplifiers in an easy-to-use,
encased form. This format makes the KE Series
amplifiers an excellent choice for use on the bench,
in a test station, or in other environments needing
both high performance and ease of use.
ꢀ
Wide bandwidth, fast settling, high slew rate
ꢀ
Low distortion and overshoot
ꢀ
Linear phase
ꢀ
Easy to use encased form
ꢀ
Direct replacement for E103, E104, E200,
E220, and E231
Applications
The op amp-based KE Series amplifiers provide a
wide selection of features as well as the ability to
customize parameters such as voltage gain and out-
put impedance to the application.
ꢀ
For use on the bench or in a test station as a video
amp, pulse amp, line driver, etc.
ꢀ
“drop in” units for radar and
communication systems
KE231 .... designed for low-gain applications
(A = ±± to ±ꢀꢁ
KE220 .... high bandwidth (-3dB BW of ±90MHzꢁ,
lower output current (ꢀ0mAꢁ
v
ꢀ.688
(±7.ꢁ)
±.62ꢁ
(/±.3)
Feedthru
KE200 .... general purpose (-3dB BW of 9ꢀMHzꢁ
KE103 .... high output current (200mAꢁ
Bottom
2.ꢀꢀꢀ
(ꢁꢀ.8)
±.ꢁꢀꢀ
(38.±)
The KE±04 is an encased version of the KH±04AI, a DC
to ±.±GHz linear amplifier with a fixed gain of ±4dB and
ꢀ0Ω input and output impedances. These features, coupled
with excellent distortion and VSWR characteristics,
make the KE±04 ideal for applications in wideband
analog and high-speed digital communications,
radar, and fiber optics transmitters and receivers.
ꢀ.2ꢁꢀ
(6./)
ꢀ.62ꢁ
(±ꢁ.9)
ꢀ.2ꢁꢀ
(6./)
±.ꢁꢀꢀ
(38.±)
ꢀ.ꢀ62
(±.6)
TYP
2.ꢁꢀꢀ
(63.ꢁ)
±.ꢀꢀꢀ
(2ꢁ./)
3.ꢀꢀꢀ
(76.2)
KE104 .... DC to ±.±GHz, fixed ±4dB gain, low distortion.
Ordering Information
KE104
Select Z , Z , and A within the following constraints:
i
o
v
Since gain and input and output impedances are fixed
on the KE±04, simply designate the connector type
required by: KE±04-BNC or KE±04-SMA.
Parameter KE103 KE200 KE220 KE231
Av
±±1±/ꢀ ±±1±ꢁꢀ ±±1±ꢁꢀ
±±1±ꢁ
max Zin
inverting
±ꢁꢀꢀ
Av
2ꢀꢀꢀ
Av
±ꢁꢀꢀ
Av
2ꢁꢀ
Av
KE103, KE200, KE220, and KE231
Due to the flexibility possible with these amplifiers,
the user must specify several parameters when ordering:
non-inverting ±ꢀk
min Zout
±ꢀk
ꢀ
±ꢀk
ꢀ
±ꢀk
ꢀ
ꢀ
The full part number is KEnnn-p-con-Z -Z -A ,
i
o
v
Example:
nnn: specify ±03, 200, 220, or 23±
p: specify N (non-invertingꢁ or I (invertingꢁ
con: specify BNC or SMA connectors or NDC for no case
Z : specify input impedance in ohms
KE200-N-BNC-7ꢀ-ꢀ0-20 means a KE200 with a non-inverting
gain, BNC connectors, 7ꢀW input impedance, ꢀ0W output
impedance, and a voltage gain of 20V/V (unterminated
outputꢁ. (When driving a realistic load, the actual gain is
i
reduced by the factor Z + Z ꢁ due to the resistive
/(Z
divider action of the output impedance, Z , and the load
load load o
Z : specify output impedance in ohms
o
o
A : specify voltage gain with output unterminated
connected to the amplifier, Z
. The unterminated voltage
gain, A , should be selected with this in mind.ꢁ
v
load
(ie: Z
= ∞ꢁ (see exampleꢁ
v
load
REV. ±A February 200±
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