KE Series Data Sheet
KE Series
Encased Amplifiers
General Description
Features
KOTA’s KE Series Amplifiers are designed to take full advantage
of KOTA’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.
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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 output impedance to the application.
KE231 .... designed for low-gain applications (Av = ±1 to ±5)
KE220 .... high bandwidth (-3dB BW of 190MHz), lower output
current (50mA)
KE200 .... general purpose (-3dB BW of 95MHz)
KE103 .... high output current (200mA)
The KE104 is an encased version of the KH104AI, a DC to
1.1GHz linear amplifier with a fixed gain of 14dB and 50Ω input
and output impedances. These features, coupled with excellent
distortion and VSWR characteristics, make the KE104 ideal for
applications in wideband analog and high-speed digital communications, radar, and fiber optics transmitters and receivers.
■
■
■
■
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
■
■
■
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
Simplified evaluation of KOTA amplifiers
0.688
(17.5)
1.625
(41.3)
Feedthru
1.500
(38.1)
2.000
(50.8)
0.250
(6.4)
1.500
(38.1)
KE104 .... DC to 1.1GHz, fixed 14dB gain, low distortion.
2.500
(63.5)
0.250
(6.4)
3.000
(76.2)
Ordering Information
KE104
Since gain and input and output impedances are fixed on the
KE104, simply designate the connector type required by: KE104BNC or KE104-SMA.
KE103, KE200, KE220, and KE231
Due to the flexibility possible with these amplifiers, the user must
specify several parameters when ordering:
The full part number is KEnnn-p-con-Zi-Zo-Av,
nnn: specify 103, 200, 220, or 231
p:
specify N (non-inverting) or I (inverting)
con: specify BNC or SMA connectors or NDC for no case
Zi:
specify input impedance in ohms
Zo: specify output impedance in ohms
Av: specify voltage gain with output unterminated
(ie: Zload = ∞) (see example)
Select Zi, Zo, and Av within the following constraints:
© 1999-2013 Exar Corp
Bottom
0.625
(15.9)
1.000
(25.4)
0.062
(1.6)
TYP
Parameter KE103 KE200 KE220 KE231
Av
±1/±40
1500
max Zin
inverting
Av
non-inverting 10k
min Zout
0
±1/±50
2000
Av
10k
0
±1/±50
1500
Av
10k
0
±1/±5
250
Av
10k
0
Example: KE200-N-BNC-75-50-20 means a KE200
with a non-inverting gain, BNC connectors, 75Ω input
impedance, 50Ω output impedance, and a voltage
gain of 20V/V (unterminated output). (When driving a
realistic load, the actual gain is reduced by the factor
Zload/(Zload + Zo) due to the resistive divider action of
the output impedance, Zo, and the load connected to
the amplifier, Zload. The unterminated voltage gain,
Av, should be selected with this in mind.)
www.exar.com
KE Series
Encased Amplifiers
June 1999
Model
-3dB
BW
(MHz)
Absolute Maximum Ratings
(Note1)
Settling
Time
(ns, %)
Slew
Rate
µs)
(V/µ
Vout, Iout
(V, mA)
(Note 2)
VCC
(V)
Power
Dissipation
(W @ 25°C)
Derate
Above 25°C
mW/°C
Output
Current
(mA)
Input
Voltage
(V)
General Purpose
KE200
95
18, 0.1
4000
±12, ±100
5-17
1.8
10
100
Note 3
-25 to +85 -65 to +150
Wide bandwidth
KE220
190
8, 0.1
7000
±12, ±50
5-17
1.5
5
50
Note 3
-25 to +85 -65 to +150
High Output Current
KE103
150
10, 0.4
6000
±11, ±200
9-17
2.0
10
200
Note 3/4
-25 to +85 -65 to +150
Low Gain
KE231
12, 0.1
3000
±11, ±100
5-17
1.8
10
100
Note 3
-25 to +85 -65 to +150
1.2, 0.8
4500
±1.6, ±40
9-17
1.8
N/A
40
±0.5
-25 to +85 -65 to +150
165
Ultra-wide Bandwidth
KE104
1100
To
(°C)
Notes
1.
Nominal configuration
Vcc: ±15V KE103, KE104, KE200, KE220, KE231
Load: 100Ω
200Ω
50Ω
KE103, KE231
KE200, KE220
KE104
Av: +20 KE103, KE200, KE220
+2 KE231
2.
When the amplifier is configured with an output impedance (Zout > 0, the maximum output
voltage swing (at the load) is reduced by the factor Zload/(Zload + Zout). See the example on page 1.
3.
These amplifiers must be kept out of saturation; in other words, the output voltage
(determined by Vin and Av.) must be kept away from the supply voltage.
4.
In the non-inverting configuration, the input voltage to the KE103 must not exceed ±5V.
Relative Bandwidth vs. Gain
1.1
Relative Bandwidth
Discussion
The performance specified above is that typically
seen for a nominally-configured KE Series
amplifier; performance for different configurations
can be determined using the graphs. Other parameters not shown can be approximated by referring to
the individual hybrid data sheets.

V CC − 2.5 
 V in <

Av


1.0
KE200
0.9
KE231
KE103
0.8
0.7
KE220
Relative Bandwidth vs. Load
Listed under the typical specifications table are the
nominal loads at which the amplifiers will typically
provide 100% of the specified bandwidth. Heavier
loads decrease the bandwidth as the plot indicates.
(The total load on the amplifier is the sum of the
output impedance, Zo, and the load connected
external to the amplifier, Zload).
Relative Bandwidth vs. VCC
All of the KE Series amplifiers are designed to
operate on ±15V supplies. The user may elect,
however, to use lower supplies but at some sacrifice
in performance as shown in the plot.
1
2
5
10
20
50
500
1000
|Gain|
Relative Bandwidth vs. Load
1.1
Relative Bandwidth
Relative Bandwidth vs. Gain
At the nominal gain setting of +20 (+2 for the
KE231),the amplifiers will typically provide 100% of
the specified bandwidth; higher gains will reduce the
bandwidth somewhat as shown in the graph.
0.6
KE103
1.0
KE200
KE220
0.9
0.8
KE231
0.7
0.6
50
100
200
Load Resistance (Ω)
Relative Bandwidth vs. VCC
1.2
Relative Bandwidth
KE Series
Encased Amplifiers
Typical Specifications
1.0
KE200
KE220
0.8
KE103
0.6
KE231
0.4
0.2
5
7
9
11
VCC (V)
2
13
15
TS
(°C)
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