ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
155
HIGH POWER DUAL
OPERATIONAL AMPLIFIER
4707 Dey Road Liverpool, N.Y. 13088
(315) 701-6751
FEATURES:
MIL-PRF-38534 QUALIFIED
Available to DSCC SMD #5962-02509HX
Space Efficient Dual Power Amplifier
Low Cost
High Voltage Operation: Up to 80V
Low Quiescent Current: 40mA Typ. Total
High Output Current: 5A Min. Per Amp
High Speed: 10V/µS Typ.
Monolithic Technology
Replaces obsolete MSK 154 up to 80V
DESCRIPTION:
The MSK 155 is a high power dual monolithic operational amplifier ideally suited for high power amplification and
magnetic deflection applications. With a total supply voltage rating of 80 volts and 5A of available output current per
amplifier, the MSK 155 is also an excellent low cost choice for motor drive circuits. With both amplifiers in the same
package, thermally induced output offset voltages are eliminated. Power dissipation is kept to a minimum with a total
quiescent current rating of only 40mA. The MSK 155 is packaged in a hermetically sealed 14 pin power dip with heat
sink bolt down tabs.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
PA Audio
Magnetic Deflection
Motor Drive
Noise Cancellation
High Power Bridge Amplifier
PIN-OUT INFORMATION
1
2
3
4
5
6
7
1
-Vcc1
Output Drive 1B
Output Drive 1A
+Vcc1
Current Sense 2
Inverting Input 2
Non Inverting Input 2
14
13
12
11
10
9
8
Non Inverting Input 1
Inverting Input 1
Current Sense1
+Vcc 2
Output Drive 2A
Output Drive 2B
-Vcc 2
Rev. A 12/01
ABSOLUTE MAXIMUM RATINGS
VCC
±IOUT
VIND
VIN
TJ
Total Supply Voltage
Output Current (within S.O.A.)
Input Voltage (Differential)
Input Voltage (Common Mode)
Junction Temperature
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80V
±5A
±Vcc
±Vcc
150°C
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TST
TLD
TC
Storage Temperature
-65°C to +150°C
Lead Temperature
300°C
Case Operating Temperature
(MSK155H/E)
-55°C to +125°C
(MSK155)
-40°C to +85°C
Thermal Resistance (DC)
Junction to Case
2.0°C/W
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RTH
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ELECTRICAL SPECIFICATIONS
MSK155H/E
Group A
Test Conditions 1
Parameter
MSK155 5
Subgroup
Min.
Typ.
Max.
Min.
Typ.
Max.
Units
-
±10
±35
±40
±10
±35
±40
V
1
-
±20
±30
-
±20
±35
mA
2
-
±20
±30
-
-
-
mA
3
-
±20
±30
-
-
-
mA
1
-
±0.1
±2
-
±0.1
±10
mV
2,3
-
±2
±10
-
-
-
mV
±10
±50
-
±10
-
µV/°C
-
-
±5
-
µV/V
-
±20
±200
pA
-
nA
Ω
STATIC
Supply Voltage Range 4
Each Amp
Quiescent Current
VIN=0V
INPUT
Offset Voltage
VIN =0V
Offset Voltage Drift 4
VIN=0V
2,3
-
Offset Voltage vs ±Vcc 2
VIN=0V
-
-
±5
1
-
±20
2, 3
-
-
-
-
-
VCM=0V
Input Bias Current 4
Input Impedance 2
(DC)
Input Capacitance 2
Common Mode Rejection 4
Noise
2
±100
12
±10
-
-
10
-
-
10
-
-
5
-
-
5
-
pF
12
VCM=±22VDC
4
95
110
-
90
110
-
dB
F = 10Hz to 1KHz
-
-
10
-
-
10
-
µVRMS
RL=10K
-
-
±33.5
-
-
±33.5
-
V
-
±29
±30
-
V
OUTPUT
Output Voltage Swing
2
Output Voltage Swing
IOUT=5A Pk
4
±29
±30
Power Bandwidth 4
RL = 10Ω VOUT=20VRMS
4
45
55
-
40
55
-
KHz
2V Step
-
-
2
-
-
2
-
µS
AV=+10V/V
-
10
-
-
10
-
-
nF
VOUT = ±10V RL = 10Ω
4
6
10
-
6
10
-
V/µS
F=10Hz RL = 10KΩ
4
95
100
-
90
100
-
dB
Settling Time to 0.1%
Capacitive Load
3 2
4
TRANSFER CHARACTERISTICS
Slew Rate 4
Open Loop Voltage Gain
4
NOTES:
1
2
3
4
5
6
7
8
Unless otherwise noted ±VCC= ±35VDC, RCL = 0Ω and specifications apply to each amplifier.
Typical parameters are for reference only.
AV=-1V/V measured in false summing junction circuit.
Devices shall be capable of meeting the parameter, but need not be tested.
Industrial grade and 'E' suffix devices shall be tested to subgroups 1 and 4 unless otherwise requested.
Military grade devices ('H' suffix) shall be 100% tested to subgroups 1,2,3 and 4.
Subgroup 5 and 6 testing available upon request.
Subgroup 1,4 TC=+25°C
Subgroup 2,5 TC=+125°C
Subgroup 3,6 TA=-55°C
2
Rev. A 12/01
APPLICATION NOTES
CURRENT LIMIT
SAFE OPERATING AREA (SOA)
(SEE TYPICAL CONNECTION DIAGRAM)
A value of current limit resistance can be calculated as follows:
The output stage of this power operational amplifier has three
distinct limitations:
1. The current handling capability of the die metallization.
2. The junction temperature of the output device's.
3. Secondary breakdown.
RCL=(0.809V/ICL) - 0.057Ω
Where:
RCL is the current limit resistor value.
ICL is the current limit desired.
0.057Ω is the drop in the current limit path across internal
impedances other than the actual current limit resistor.
0.809Ω volts is the voltage drop that must be developed
across the current limit connections to activate the current
limit circuit at 25°C.
All applications should be checked against the SOA curves.
NOTE: The output stage is protected against transient flyback.
However, for protection against sustained, high energy flyback,
external fast-recovery reverse biased diodes should be connected
from the output to ground.
It is recommended the user limit output current to a value as
close to the required output current as possible, without clipping output voltage swing. Current limit will vary with case
temperature. Refer to the typical performance curves to predict current limit drift. If current limit is not required replace the
STABILITY
It is recommended that the parallel sum of the input and feedback resistor be 1000 ohms or less to minimize phase shift
caused by the R-C network formed by the input resistor, feedback resistor and input capacitance. An effective method of
checking amplifier stability is to apply the worst case capacitive load to the output of the amplifier and drive a small signal
square wave across it. If overshoot is less than 25%, the
system will typically be stable.
INPUT PROTECTION
Input protection circuitry within the MSK 155 will clip differential input voltages greater than VCC. The inputs are also
protected against common mode voltages up to the supply rails
as well as static discharge. There are current limiting resistors
in series with each input. These resistors may become damaged in the event the input overload is capable of driving currents above 1mA. If severe overload conditions are expected,
external input current limiting resistors are recommended.
POWER SUPPLY DECOUPLING
A 0.1 microfarad ceramic disc and low ESR capacitor with a
value of 10 microfarads per amp of output current should be
placed in parallel from each power supply pin to ground. These
capacitors must be rated for the full power supply voltage. Since
the MSK 155 is commonly used in circuits where the loop gain
is greater than 10 V/V, high frequency noise that enters the opamp through the power supply lines will be amplified and could
cause the amplifier to break into oscillation. In addition, without supply bypassing, the inductance of the power supply lines
interacts with capacitive loads to form an oscillatory LC tank
circuit. The power supply decoupling capacitors will minimize
this effect and keep the circuit stable.
TYPICAL CONNECTION DIAGRAM
3
Rev. A 12/01
TYPICAL PERFORMANCE CURVES
4
Rev. A 12/01
MECHANICAL SPECIFICATIONS
MSK155
ESD TRIANGLE INDICATES PIN 1.
ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED.
ORDERING INFORMATION
Part
Number
MSK155
MSK155E
MSK155H
MSK155H
Screening Level
Industrial
Extended Reliability
Mil-PRF-38534
5962-02509HX DSCC SMD
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 12/01