MSK181 MSK | Alldatasheet
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4707 Dey Road Liverpool, N.Y. 13088 (315) 701-6751 FEATURES: Low Cost High Voltage Operation: Single Supply: +8V to +60V Dual Supply: ±4V to±30V High Output Current: 3 Amp Continuous High Speed: 10V/µS Low Quiescent Current: 20 mA Typ. Adjustable Current Limits Thermal Shutdown Monolithic Technology Enable/Status Pin For Output Disable Control MIL-PRF-38534 CERTIFIED 181 HIGH VOLTAGE/HIGH CURRENT OPERATIONAL AMPLIFIER ISO-9001 CERTIFIED BY DSCC Servo Driver Actuator Driver Audio Amplifier Power Supplies +VIN -VIN ILIM E/S -Vcc +Vcc Output N/C M.S.KENNEDY CORP. MSK181Z MSK181 DESCRIPTION: The MSK 181 is a high power monolithic operational amplifier ideal for use with a wide variety of loads. With operation from either single or dual supplies, the MSK 181 offers excellent design flexibility. Power dissipation is kept to a minimum with a quiescent current rating of only 20mA, while 3 Amps of continuous available output current makes the MSK 181 a very good low cost choice for motor drive circuits and audio amplification. The MSK 181 is internally protected against current overloads and overtemperature conditions. Current limit can also be user-selected through the use of a resistor/potentiometer or voltage out/ current out DAC. The MSK 181 is packaged in a hermetically sealed 8 pin power dip and the MSK 181Z is offered with bolt down tabs for applications that require heat sinking. EQUIVALENT SCHEMATIC PIN-OUT INFORMATION TYPICAL APPLICATIONS PRELIMINARY Rev. C 8/01
Max. ±30 ±20 ±20 ±10 ±500 ±50 -29 60V ±29.5V +27V/-29V Internal Protection (See Application Note) 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 1.8°C/W ABSOLUTE MAXIMUM RATINGS TST TLD TC RTH VCC ±IOUT VIND VIN TJ Unless otherwise specified ±VCC= ±30VDC and E/S pin is open. Devices shall be capable of meeting the parameter, but need not to be tested. Typical parameters are for reference only. Industrial grade and 'E' suffix devices shall be tested to subgroups 1 and 4 unless otherwise specified. Military grade devices ('H' suffix) shall be 100% tested to subgroups 1,2,3 and 4. Subgroup 1,4 TA=TC=+25°C Subgroup 2 TA=TC=+125°C Subgroup 3 TA=TC=-55°C Storage Temperature Range Lead Temperature Range (10 seconds) Case Operating Temperature (MSK181H/E) (MSK181) Thermal Resistance Junction to Case VIN=0V VIN=0V VIN=0V VIN=OV f=DC f=DC (-VCC)-0.1≤ VIN ≤ (+VCC)-3V f=1KHZ IOUT=0.6A IOUT=3.0A DC=Continuous VES High- Output Enabled E/S Open or High VES Low- Output Disabled E/S Forced Low AV=1 VOUT= 50Vp-p RL=8Ω VOUT=±25V RL=1KΩ AV=10 50V Step Group A Subgroup 2,3 STATIC Supply Voltage Range INPUT Input Offset Voltage Input Offset Voltage Drift Input Bias Current Input Offset Current Input Impedance Input Capacitance Common Mode Rejection Ratio Input Voltage Noise Density OUTPUT Output Current Output Disable Time Output Enable Time TRANSFER CHARACTERISTICS Open Loop Voltage Gain Typ. ±17 ±17 ±30 ±100 ±28 ±26 Min. ±27 ±25.5 -27.5 Min. ±26 ±24 -27.5 Max. ±30 ±23 ±15 ±750 ±75 -29 Typ. ±17 ±30 ±100 ±28 ±26 Units V mA mA mA mV µV/°C nA nA Ω pF dB nV/√HZ V V A V V µS µS V/µS dB µS MSK181H/E MSK181 Parameter Test Conditions ELECTRICAL SPECIFICATIONS NOTES: Quiescent Current PRELIMINARY Rev. C 8/01 Quiescent Current VIN=0V Shutdown Mode VIN=0V Shutdown Input Mode Output Voltage Swing Slew Rate Settling Time ±0.1%
POWER SUPPLIES: The MSK 181 maximum total supply voltage is specified as 60V. However, dual and unbalanced power supply operation is permissible as long as total supply voltage does not exceed 60V. POWER SUPPLY BYPASSING: Power supply terminals must be effectively decoupled with a high and low frequency bypass circuit to avoid power supply induced oscillation. An effective decoupling scheme consists of a 0.1µF ceramic capacitor in parallel with a 10µF tantalum capacitor for each power supply pin to ground. In addition, it is recommended that a 0.01µF capacitor be placed between ±Vcc as close to the MSK 181 as possible. COMPENSATION: For normal operation output compensation is not typically required. However, if the MSK 181 is intended to be driven into current limit the user may find that an R/C network is required. A snubber network from the output to ground will provide sta- bility. If driving large capacitive or inductive loads, a snubber network will also enhance stability. Typically 3Ω to 10Ω in se- ries with 0.01µF is acceptable. CURRENT LIMIT: The MSK 181 offers accurate, user-selectable current limit. Unlike typical designs that use a power resistor in series with the output to sense load, the MSK 181 senses the load indi- rectly and therefore does not require a resistor to handle the full output current. Current limit is selected by controlling the input to the ILIM pin. The easiest method is to use a resistor or potentiometer con- nected between-Vcc and the ILIM pin. Use the following equa- tion to select proper resistor value: 71,250 ILIM A low level control signal (0-330µA) can also be used to con- trol the current level digitally. If the pin is left open, the current is programmed to OA, while connecting ILIM directly to -Vcc sets the output current to it's maximum, typically 5A. The MSK 181 is equipped with thermal protection circuitry that protects the amplifier from damage caused by excessive junction temperature. The output is disabled when the junction temperature reaches approximately 160°C. After the junction temperature cools to approximately 140°C, the output is again enabled. The thermal protection may cycle on and off depend- ing on the output load and signal conditions; this may have an undesirable effect on the load. It should be noted that even though this internal protection circuitry does protect against overload conditions, it does not take the place of proper heat sinking. For reliable operation, junction temperature should be limited to 150°C, maximum. TYPICAL CONNECTION DIAGRAM PRELIMINARY Rev. C 8/01 SAFE OPERATING AREA: The safe operating area curve is a graphical representation of the power handling capability of the amplifier under various conditions. Power dissipation of the device is equal to the prod- uct of the voltage across the output transistor times the output current. As can be seen in the curve, safe operating current decreases with an increase in temperature as well as an in- crease in the voltage across the output transistor. Therefore, for maximum amplifier performance it is important to keep case temperature as low as possible and to keep ±Vcc as close to the output rail as achievable. THERMAL PROTECTION: This pin actually has a dual function. First, when the pin is forced low, the output stage is disabled. Second, it can be monitored to determine if the device is in thermal shutdown. These functions can be used on the same device with either single or dual supplies. For normal operation, the E/S pin must be left open or pulled at least 2.4 volts above the negative rail. In noisy applications, a small value capacitor between the E/S pin and -Vcc may be required. ENABLE/STATUS PIN: To disable the output, the user must pull the E/S pin low, no greater than 0.8V above -Vcc. To once again enable the de- vice, the E/S pin must be brought at least 2.4 volts above -Vcc or disconnected. It should be noted that when the E/S pin is high, the internal thermal shutdown is still active. If the E/S pin is used to monitor thermal shutdown, during normal operation the voltage on the E/S pin is typically 3.5V above -Vcc. Once shutdown has occurred this voltage will drop to approximately 350mV above -Vcc. -13.75KΩ Rcc=
TYPICAL PERFORMANCE CURVES PRELIMINARY Rev. C 8/01
ORDERING INFORMATION
ESD TRIANGLE INDICATES PIN 1. ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED. 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. M.S. Kennedy Corp.
4707 Dey Road, Liverpool, New York 13088
Phone (315) 701-6751 FAX (315) 701-6752 www.mskennedy.com MSK181 MSK181 MSK181Z PRELIMINARY Rev. C 8/01 H Z BLANK= NO TAB; Z= Z TAB SCREENING GENERAL PART NUMBER BLANK = INDUSTRIAL; E = EXTENDED RELIABILITY H = MIL-PRF-38534