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ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
4707 Dey Road Liverpool, N.Y. 13088
HIGH POWER DUAL OPERATIONAL AMPLIFIER
155
(315) 701-6751
FEATURES:
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/S Typ. Monolithic Technology Replaces obsolete MSK 154 up to 80V
MIL-PRF-38534 QUALIFIED
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 1 2 3 4 5 6 7
1
PIN-OUT INFORMATION
-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

RTH
ELECTRICAL SPECIFICATIONS
Parameter STATIC Supply Voltage Range 4 Quiescent Current Each Amp VIN=0V 1 2 3 1 2,3 2,3 1 2, 3 VCM=22VDC F = 10Hz to 1KHz
2
Test Conditions 1
Group A Subgroup
MSK155H/E Min. 10 95 29 45 10 6 95 Typ. 35 20 20 20 0.1 2 10 5 20 10 5 110 10 33.5 30 55 2 10 100
12
MSK155 5 Min. 10 90 29 40 10 6 90 Typ. 35 20 0.1 10 5 20 10 5 110 10 33.5 30 55 2 10 100
12
Max. 40 30 30 30 2 10 50 100 10 -
Max. 40 35 10 200 -
INPUT Offset Voltage Offset Voltage Drift 4 Offset Voltage vs Vcc 2 Input Bias Current 4 Input Impedance 2 Input Capacitance 2 Common Mode Rejection 4 Noise OUTPUT Output Voltage Swing Output Voltage Swing Power Bandwidth 4 Settling Time to 0.1% Capacitive Load Slew Rate 4 Open Loop Voltage Gain
4 4 32 2
VIN=0V VIN=0V VIN=0V VCM=0V (DC)
4 4 4 4 4
RL=10K IOUT=5A Pk RL = 10 VOUT=20VRMS 2V Step AV=+10V/V VOUT = 10V RL = 10 F=10Hz RL = 10K
TRANSFER CHARACTERISTICS V/S dB
NOTES:
1 2 3 4 5 6 7 8 Unless otherwise noted VCC= 35VDC, RCL = 0 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=+25C Subgroup 2,5 TC=+125C Subgroup 3,6 TA=-55C
2
Rev. A 12/01

VCC IOUT VIND VIN TJ
Total Supply Voltage Output Current (within S.O.A.) Input Voltage (Differential) Input Voltage (Common Mode) Junction Temperature
80V 5A Vcc Vcc 150C
TST TLD TC
Storage Temperature -65C to +150C Lead Temperature 300C Case Operating Temperature (MSK155H/E) -55C to +125C (MSK155) -40C to +85C Thermal Resistance (DC) Junction to Case 2.0C/W
Units V mA mA mA mV mV V/C V/V pA nA pF dB VRMS V V KHz S nF
APPLICATION NOTES CURRENT LIMIT
(SEE TYPICAL CONNECTION DIAGRAM)
SAFE OPERATING AREA (SOA)
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. 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.
A value of current limit resistance can be calculated as follows: RCL=(0.809V/ICL) - 0.057 Where: RCL is the current limit resistor value. ICL is the current limit desired. 0.057 is the drop in the current limit path across internal impedances other than the actual current limit resistor. 0.809 volts is the voltage drop that must be developed across the current limit connections to activate the current limit circuit at 25C.
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. 3
TYPICAL CONNECTION DIAGRAM
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

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