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FEATURES: 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 MSK154 up to 80V 155 M.S.KENNEDY CORP. HIGH POWER DUAL OPERATIONAL AMPLIFIER PIN-OUT INFORMATIONTYPICAL APPLICATIONS PA Audio Magnetic Deflection Motor Drive Noise Cancellation High Power Bridge Amplifier -Vcc1 Output Drive 1B Output Drive 1A +Vcc1 Current Sense 2 Inverting Input 2 Non Inverting Input 2 Non Inverting Input 1 Inverting Input 1 Current Sense1 +Vcc 2 Output Drive 2A Output Drive 2B -Vcc 2 EQUIVALENT SCHEMATIC The MSK155 is a high power dual monolithic operational amplifier ideally suited for high power amplification and mag- netic deflection applications. With a total supply voltage rating of 80 volts and 5A of available output current per amplifier, the MSK155 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 MSK155 is packaged in a hermetically sealed 14 pin power dip with heat sink bolt down tabs. DESCRIPTION: 1 8548-126 Rev. E 6/14 MIL-PRF-38534 AND 38535 CERTIFIED FACILITY
Offset Voltage vs ±Vcc Input Impedance Input Capacitance Common Mode Rejection Noise OUTPUT Output Voltage Swing Output Voltage Swing Power Bandwidth Settling Time to 0.1% Capacitive Load TRANSFER CHARACTERISTICS Slew Rate Open Loop Voltage Gain Max. ±40 ±30 ±30 ±30 ±10 ±50 ±100 ±150 80V ±5A ±Vcc ±Vcc 150°C Total Supply Voltage Output Current (within S.O.A.) Input Voltage (Differential) Input Voltage (Common Mode) Junction Temperature -65°C to +150°C 300°C -55°C to +125°C -40°C to +85°C 2.0°C/W ABSOLUTE MAXIMUM RATINGS TST TLD TC RTH VCC ±IOUT VIND VIN TJ Unless otherwise noted ±VCC= ±35VDC, RCL = 0Ω and specifications apply to each amplifier. Typical parameters are for reference only. A V=-1V/V measured in false summing junction circuit. Devices shall be capable of meeting the parameter, but need not be tested. Industrial grade 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 T C=+25°C Subgroup 2,5 TC=+125°C Subgroup 3,6 TA=-55°C Continuous operation at or above absolute maximum ratings may adversely effect the device performance and/or life cycle. Internal solder reflow temperature is 180°C, do not exceed. Storage Temperature Lead Temperature Case Operating Temperature (MSK155H) (MSK155) Thermal Resistance (DC) Junction to Case VIN=0V VIN=0V (DC) VCM=±22VDC F = 10Hz to 1KHz RL=10K IOUT=5A Pk RL = 10Ω VOUT=20VRMS 2V Step AV=+10V/V VOUT = ±10V R L = 10Ω F=10Hz R L = 10KΩ Group A Subgroup 2,3 2,3 2, 3 Typ. ±35 ±20 ±20 ±20 ±0.1 ±10 ±20 110 ±33.5 ±30 100 Min. ±10 ±29 Min. ±10 ±29 Max. ±40 ±35 ±10 ±200 Typ. ±35 ±20 ±0.1 ±10 ±20 110 ±33.5 ±30 100 Units V mA mA mA mV mV μV/°C μV/V pA nA Ω pF dB μVRMS V V KHz μS nF V/μS dB MSK155H MSK155 Parameter Test Conditions ELECTRICAL SPECIFICATIONS NOTES: Quiescent Current 3 2 Each Amp VIN=0V Offset Voltage Input Bias Current VIN=0V VCM=0V 8548-126 Rev. E 6/14
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. R CL=(0.809V/ICL) - 0.057Ω A value of current limit resistance can be calculated as fol- lows: 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. It is recommended the user limit output current to a value as close to the required output current as possible, without clip- ping output voltage swing. Current limit will vary with case tem- perature. Refer to the typical performance curves to predict cur- rent limit drift. If current limit is not required replace the resistor TYPICAL CONNECTION DIAGRAM 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 MSK155 is commonly used in circuits where the loop gain is greater than 10 V/V, high frequency noise that enters the op- amp 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. POWER SUPPLY DECOUPLING Input protection circuitry within the MSK155 will clip differ- ential input voltages greater than V CC. The inputs are also pro- tected 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. INPUT PROTECTION It is recommended that the parallel sum of the input and feed- back resistor be 1000 ohms or less to minimize phase shift caused by the R-C network formed by the input resistor, feed- back resistor and input capacitance. An effective method of check- ing 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. STABILITY 3 8548-126 Rev. E 6/14
TYPICAL PERFORMANCE CURVES 4 8548-126 Rev. E 6/14
MIL-PRF-38534, CLASS H
ORDERING INFORMATION
5 8548-126 Rev. E 6/14 ESD TRIANGLE INDICATES PIN 1 WEIGHT=7.2 GRAMS TYPICAL ALL DIMENSIONS ARE SPECIFIED IN INCHES
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. Phone (315) 701-6751 FAX (315) 701-6752 www.mskennedy.com 5 8548-126 Rev. E 6/14