ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
450
DUAL ULTRA
HIGH SPEED AMPLIFIER
4707 Dey Road Liverpool, N.Y. 13088
(315) 701-6751
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% @ VIN=10V
Wide Bandwidth - 65MHz at Gain of -1
20MHz Full Power Bandwidth - 20VPP @ RL=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 monolithic 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
Balance A
-Input A
+Input A
-VCC A
Balance B
-Input B
+Input B
-VCC B
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Balance A
NC
-Input A
NC
+Input A
-VCC A
NC
NC
Balance B
NC
-Input B
NC
+Input B
-VCC B
16
15
14
13
12
11
10
9
Balance A
+VCC A
Output A
FF A
Balance B
+VCC B
Output B
FF B
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Balance A
NC
+VCC A
NC
Output A
FF A
NC
NC
Balance B
NC
+VCC B
NC
Output B
FF B
"R" Package
TYPICAL APPLICATIONS
Flash ADC Amplifiers
High Speed Current DAC Interfaces
Video Distribution
Pulse Amplifiers
High Speed Communication
Radar, IF Processors
1
Rev. A 6/02
ABSOLUTE MAXIMUM RATINGS
±VCC
VIC
VIND
IIN
IOS
TC
Supply Voltage
±18V
Common Mode Input Voltage
±VCC
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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RTH Thermal Resistance
Junction to Case
TST Storage Temperature Range
TLD Lead Temperature
(10 Seconds)
P D Power Dissipation
TJ Junction Temperature
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10°C/W
-65°C to +150°C
300°C
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1.5W
175°C
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ELECTRICAL SPECIFICATIONS
±Vcc=15VDC Unless Otherwise Specified
Group A
Test Conditions
Parameter
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MSK 450B/E
Subgroup Min.
MSK 450
Typ.
Max.
Min.
Typ.
Max.
Units
STATIC
2 7
-
±4.5
±15
±18
±4.5
±15
±18
V
VIN=0V
1
-
±6.5
±8
-
±6.5
±10
mA
Each Amplifier
2,3
-
±8.5
±10
-
-
-
mA
Input Offset Voltage
VIN=0V
1
-
±50
±325
-
±50
±500
µV
Input Offset Drift
VIN=0V
2,3
-
±1.0
±7.5
-
±1.0
-
µV/°C
vs. VCC
-
4
20
4
20
µV/V
Supply Voltage Range
Quiescent Current
INPUT
Input Offset Voltage
2
Input Bias Current
Input Resistance 2
Input Capacitance
2
Input Voltage Range 2
VCM=0V
1
-
±250 ±500
-
±250
±550
nA
Either Input
2,3
-
±1800 ±2800
-
-
-
nA
-Input
-
-
50
65
-
50
65
Ω
+Input
-
7
10
-
7
10
-
MΩ
Either Input
-
-
2
-
-
2
-
pF
Common Mode
-
±10
-
-
±10
-
-
V
Input Voltage Noise
2
F ≥ 1KHz
-
-
2.0
2.5
-
2.0
2.5
nV√Hz
Input Current Noise
2
F=1KHz
-
-
12.0
15.0
-
12.0
15.0
pA√Hz
RL=500Ω F ≤ 10MHz
4
±10
±11
-
±10
±11
-
V
Continuous
4
±50
±80
-
±50
±80
-
mA
0.1% 10V step
4
-
100
125
-
100
125
nS
1.0% 10V step
4
-
50
65
-
50
65
nS
VO=±10V
4
15
20
-
15
20
-
MHz
Input=OdBm
4
50
65
-
45
65
-
MHz
VIN=2VRMS
-
-
0.005
-
-
0.005
-
%
Open Loop
-
-
12
-
-
12
-
Ω
Slew Rate
VOUT =±10V
4
1200
2000
-
1200
2000
-
V/µS
Open Loop Transresistance
VOUT =±10V
4
2.3
3.0
-
2.0
3.0
-
MΩ
OUTPUT
Output Voltage Swing
Output Current
Settling Time
1 2
Full Power Bandwidth
Bandwidth (Small Signal)
Harmonic Distortion
Output Resistance
2
2
2
TRANSFER CHARACTERISTICS
Transcapacitance
-
-
4.5
-
-
4.5
-
pF
F=4.4MHz
-
-
±0.1
-
-
±0.1
-
Degree
F=4.4MHz
-
-
0.03
-
-
0.03
-
%
2
Differential Phase Error
Differential Gain Error
2
2
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.
TA=TC=+25°C
Subgroup 1,4
TA=TC=+125°C
Subgroup 2,5
TA=TC=-55°C
Subgroup 3,6
7 Electrical specifications are derated for power supply voltages other than ±15VDC.
2
Rev. A 6/02
APPLICATION NOTES
STABILITY AND LAYOUT CONSIDERATIONS
OPTIONAL OFFSET NULL
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 inductance. The curve below shows the relationship between resonant
frequency and capacitor value for 3 trace lengths.
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)
R1
R2
-1
1KΩ
1KΩ
-5
200Ω
1KΩ
-10
50Ω
500Ω
+10
50Ω
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.
ORDERING INFORMATION
Part
Number
MSK 450Q
MSK 450EQ
MSK 450BQ
MSK 450R
MSK 450ER
MSK 450BR
Screening Level
Industrial
Extended Reliability
Mil-PRF-38534 Class H
Industrial
Extended Reliability
Mil-PRF-38534 Class H
M.S. Kennedy Corp.
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.
5
Rev. A 6/02