ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
DUAL ULTRA
HIGH SPEED AMPLIFIER
450
(315) 701-6751
4707 Dey Road Liverpool, N.Y. 13088
MIL-PRF-38534 QUALIFIED
FEATURES:
Very High Output Slew Rate - Up to 2000V/µS
Low Quiescent Current - ±6.5mA (per Amplifier)
Fast Settling Time - 100nS to 0.1% @ V
IN
=10V
Wide Bandwidth - 65MHz at Gain of -1
20MHz Full Power Bandwidth - 20V
PP
@ R
L
=500Ω
Ultra Low Offset - ±50µV
Very Low Offset Drift - ±1.0µV/°C
Space Efficient Dual
Available in Surface Mount Package
MSK 450 Q
MSK 450 R
DESCRIPTION:
The MSK 450 is a dual high speed operational amplifier that exhibits an impressive combination of high bandwidth, speed
and precision D.C. characteristics. The hybrid's current feedback architecture provides much better ac performance, higher
linearity and cleaner pulse response than traditional Op-Amps which make the MSK 450 an excellent choice as a Flash
A/D converter driver or one of a variety of video type applications. The MSK 450 delivers hybrid performance at a mono-
lithic price. The MSK 450 is available in a 16 pin ceramic dip as well as a 28 pin surface mount package.
EQUIVALENT SCHEMATIC
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
The MSK 450 contains two totally isolated independent
monolithic integrated circuits. The equivalent schematic
of one half of the MSK 450 Q is shown to the left.
PIN-OUT INFORMATION
"Q" Package
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
Balance A
-Input A
+Input A
-V
CC
A
Balance B
-Input B
+Input B
-V
CC
B
"R" Package
Balance A
NC
-Input A
NC
+Input A
-V
CC
A
NC
NC
Balance B
NC
-Input B
NC
+Input B
-V
CC
B
16
15
14
13
12
11
10
9
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Balance A
+V
CC
A
Output A
FF A
Balance B
+V
CC
B
Output B
FF B
Balance A
NC
+V
CC
A
NC
Output A
FF A
NC
NC
Balance B
NC
+V
CC
B
NC
Output B
FF B
Rev. A 6/02
TYPICAL APPLICATIONS
Flash ADC Amplifiers
High Speed Current DAC Interfaces
Video Distribution
Pulse Amplifiers
High Speed Communication
Radar, IF Processors
ABSOLUTE MAXIMUM RATINGS
-65°C to +150°C
300°C
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ELECTRICAL SPECIFICATIONS
Parameter
STATIC
Supply Voltage Range
Quiescent Current
INPUT
Input Offset Voltage
Input Offset Drift
Input Offset Voltage
Input Bias Current
Input Resistance
2
Input Capacitance
2
Input Voltage Range
2
Input Voltage Noise
Input Current Noise
OUTPUT
Output Voltage Swing
Output Current
Settling Time
1 2
2
2
2
2 7
±Vcc=15VDC Unless Otherwise Specified
Group A
MSK 450B/E
Typ.
±15
±6.5
±8.5
±50
±1.0
4
-
-
-
7
-
±10
-
-
±10
±50
-
-
15
50
-
-
1200
2.3
-
-
-
Max.
±18
±8
±10
±325
±7.5
20
-
-
-
7
-
±10
-
-
±10
±50
-
-
15
45
-
-
1200
2.0
-
-
-
Min.
±4.5
-
-
-
-
MSK 450
Typ.
±15
±6.5
-
±50
±1.0
4
±250
-
50
10
2
-
2.0
12.0
±11
±80
100
50
20
65
0.005
12
2000
3.0
4.5
±0.1
0.03
Max.
±18
±10
-
±500
-
20
±550
-
65
-
-
-
2.5
15.0
-
-
125
65
-
-
-
-
-
-
-
-
-
Subgroup Min.
-
±4.5
-
-
-
-
Units
Test Conditions
V
IN
=0V
Each Amplifier
V
IN
=0V
V
IN
=0V
vs. V
CC
V
CM
=0V
Either Input
-Input
+Input
Either Input
Common Mode
F
≥
1KHz
F=1KHz
R
L
=500Ω F
≤
10MHz
Continuous
0.1% 10V step
1.0% 10V step
V
O
=±10V
2
1
2,3
1
2,3
-
1
2,3
-
-
-
-
-
-
4
4
4
4
4
4
-
-
4
4
-
-
-
±250 ±500
±1800 ±2800
50
10
2
-
2.0
12.0
±11
±80
100
50
20
65
0.005
12
2000
3.0
4.5
±0.1
0.03
65
-
-
-
2.5
15.0
-
-
125
65
-
-
-
-
-
-
-
-
-
Full Power Bandwidth
Bandwidth (Small Signal)
Harmonic Distortion
Output Resistance
Slew Rate
Open Loop Transresistance
Transcapacitance
2
2
2
2
2
Input=OdBm
V
IN
=2V
RMS
Open Loop
V
OUT
=±10V
V
OUT
=±10V
F=4.4MHz
F=4.4MHz
TRANSFER CHARACTERISTICS
V/µS
MΩ
pF
Degree
%
Differential Phase Error
Differential Gain Error
NOTES:
1
2
3
4
5
6
AV= -1, measured in false summing junction circuit.
Guaranteed by design but not tested. Typical parameters are representative of actual device performance but are for reference only.
Industrial grade and "E" suffix devices shall be tested to subgroups 1 and 4 unless otherwise specified.
Military grade devices ("B" suffix) shall be 100% tested to subgroups 1,2,3 and 4.
Subgroups 5 and 6 testing available upon request.
T
A
=T
C
=+25°C
Subgroup 1,4
T
A
=T
C
=+125°C
Subgroup 2,5
T
A
=T
C
=-55°C
Subgroup 3,6
7 Electrical specifications are derated for power supply voltages other than ±15VDC.
2
Rev. A 6/02
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±V
CC
V
IC
V
IND
I
IN
I
OS
T
C
Supply Voltage
±18V
Common Mode Input Voltage
±V
CC
Differential Input Voltage
6V
Inverting Input Current (Continuous)
5mA
Output Short Circuit Duration
Indefinite
Case Operating Temperature Range
(MSK 450B/E)
-55°C to+125°C
(MSK 450)
-40°C to +85°C
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R
TH
Thermal Resistance
Junction to Case
T
ST
Storage Temperature Range
T
LD
Lead Temperature
(10 Seconds)
P
D
Power Dissipation
T
J
Junction Temperature
10°C/W
1.5W
175°C
V
mA
mA
µV
µV/°C
µV/V
nA
nA
Ω
MΩ
pF
V
nV√Hz
pA√Hz
V
mA
nS
nS
MHz
MHz
%
Ω
APPLICATION NOTES
STABILITY AND LAYOUT CONSIDERATIONS
As with all wideband devices, proper decoupling of the power
lines is extremely important. The power supplies should be
bypassed, as near to the power supply pins as possible, with a
parallel grouping of a 0.1µF ceramic disc and a 4.7µF tantalum
capacitor. Ferrite beads can also be very helpful in some demanding
applications. A small resistor should be used in series with the
supply pins (4.7Ω TYP.). Wideband devices are also sensitive to
printed circuit board layout. Be sure to keep all runs as short as
possible, especially those associated with the summing junction
and power lines. Circuit traces should be surrounded by ground
planes whenever possible to reduce unwanted resistance and induc-
tance. The curve below shows the relationship between resonant
frequency and capacitor value for 3 trace lengths.
OPTIONAL OFFSET NULL
Typically, the MSK 450 has an input offset voltage of only
50µV. When the feedback resistor value is
≥
1KΩ, it may be
desirable to null the offset externally, because of the bias current at
the inverting input. Figure 1 below illustrates optional offset null for
one side of the MSK 450 Q.
Figure 1
LARGE CAPACITIVE LOADS
When it is required to drive capacitive loads greater than 100pF,
an external network can be connected as shown in Figure 2. For
CL=1000pF, R3 should be 750Ω and C1 should be 22pF. This
network should be connected between the output and feed forward
pins of the hybrid. This circuit will yield a maximum slew rate of
approximately 100V/µS. For bandwidth and stability, the optimum
value of R3 should be emperically determined.
EXTERNAL COMPONENT SELECTION
The table below illustrates nominal values for the feedback and
input resistors for various closed loop gain settings. These values
were chosen to yield high bandwidth with minimal peaking.
External Component Selection Guide
Gain (V/V)
-1
-5
-10
+10
R1
1KΩ
200Ω
50Ω
50Ω
R2
1KΩ
1KΩ
500Ω
450Ω
Figure 2
NON-INVERTING APPLICATIONS
The MSK 450 is suited for use at gains of 10 or greater when
being used in the non-inverting mode. The reason for this is that the
non-inverting input cannot tolerate transients greater than ±1V.
However, the MSK 450 can be used at lower non-inverting gains if
the input voltage remains small. Please consult factory for further
information.
3
Rev. A 6/02
TYPICAL PERFORMANCE CURVES
4
Rev. A 6/02
MECHANICAL SPECIFICATIONS
MSK 450 Q
MSK 450 R
ESD TRIANGLE INCICATES PIN 1.
NOTE: ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED.
Part
Number
MSK 450Q
ORDERING INFORMATION
Screening Level
Industrial
Extended Reliability
Mil-PRF-38534 Class H
Industrial
Extended Reliability
Mil-PRF-38534 Class H
MSK 450EQ
MSK 450BQ
MSK 450R
MSK 450ER
MSK 450BR
4707 Dey Road, Liverpool, New York 13088
Phone (315) 701-6751
FAX (315) 701-6752
www.mskennedy.com
The information contained herein is believed to be accurate at the time of printing. MSK reserves the right to make
changes to its products or specifications without notice, however, and assumes no liability for the use of its products.
Please visit our website for the most recent revision of this datasheet.
M.S. Kennedy Corp.
5
Rev. A 6/02
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