Details, datasheet, quote on part number: MSK158E
CategoryAnalog & Mixed-Signal Processing => Amplifiers => Operational Amplifiers
DescriptionOperational Amplifier, Same as MSK 158 With Heat Sink Tabs
CompanyM.S. Kennedy
DatasheetDownload MSK158E datasheet


Features, Applications

4707 Dey Road Liverpool, N.Y. 13088 Monolithic MOS Technology Low Cost High Voltage Operation - 350V Low Quiescent Current - 2mA Max. High Output Current - 60mA Min. No Secondary Breakdown High Speed - 40V/S Typ.

The MSK is an ultra high voltage monolithic MOSFET operational amplifier ideally suited for electrostatic transducer and electrostatic deflection applications. With a total supply voltage rating of 350 volts and 60mA of available output current, the MSK 158 is also an excellent low cost choice for high voltage piezo drive circuits. The MOSFET output frees the MSK 158 from secondary breakdown limitations and power dissipation is kept to a minimum with a quiescent current rating of only 2mA. The MSK 158 is packaged in a hermetically sealed 8 pin power dip which has two external compensation pins. For applications requiring heat sinking, the MSK 159 is available with bolt down tabs and is otherwise identical to the MSK 158 (see mechanical specifications).


Piezo Electric Positioning Electrostatic Deflection Computer to Vacuum Tube Interface Ultra High Voltage Op-Amp Applications

-Vcc Comp 1 Output Drive Current Sense Inverting Input Non-Inverting Input Comp 2 +Vcc

VCC IOUT IOUTP VIND VIN TJ Total Supply Voltage Output Current (within S.O.A.) Output Current Peak Input Voltage (Differential) Input Voltage (Common Mode) Junction Temperature

TST Storage Temperature TLD Lead Temperature TC Case Operating Temperature (MSK 158B/E/159B/E) (MSK158/159) RTH Thermal Resistance (DC) Junction to Case

Parameter STATIC Supply Voltage Range 2 Quiescent Current INPUT Offset Voltage Offset Voltage Drift Input Bias Current 4 Input Impedance Input Capacitance Noise OUTPUT Output Voltage Swing Output Current Power Bandwidth Resistance

Settling Time to 0.1% Capacitive Load Slew Rate Open Loop Voltage Gain

Unless otherwise noted RC=2.2K, VCC=150VDC. Derate maximum supply voltage 0.5V/C below TC=+25C. No derating is needed above TC=25C. AV=-10V/V 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. Subgroup TA=TC=+25C 7 Subgroup TA=TC=+125C 8 Subgroup TA=TC=-55C 9 Electrical specifications are derated for power supply voltages less than 50VDC.

Current limit resistor value can be calculated as follows: It is recommended that the user set up the value of current limit as close as possible to the maximum expected output current to protect the amplifier. The minimum value of current limit resistance is 33 ohms. The maximum practical value is 500 ohms. Current limit will vary with case temperature. Refer to the typical performance graphs as a guide. Since load current passes through the current limit resistor, a loss in output voltage swing will occur. The following formula approximates output voltage swing reduction: VR=IO * RCL When the device is in current limit, there will be spurious oscillations present on the negative half cycle. The frequency of the oscillation is application dependant and can not be predicted. Oscillation will cease when the device comes out of current limit. If current limit is not required simply short pin 3 and pin 4.

The MOSFET output stage of this power operational amplifier has two distinct limitations: 1. The current handling capability of the die metallization. 2. The junction temperature of the output MOSFET's. 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.

Input protection circuitry within the MSK 158/159 will clip differential input voltages greater than 16 volts. The inputs are also protected against common mode voltages up to the supply rails as well as static discharge. There are 300 ohm 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.

A 100 ohm resistor and a 330pF capacitor connected in series from the output of the amplifier to ground is recommended for applications where load capacitance is less than 330pF. For larger values of load capacitance, the output snubber network may be omitted. If loop stability becomes a problem due to excessively high load capacitance, a 100 ohm resistor may be added between the output of the amplifier (the junction of RCL and pin 4) and the load. A small tradeoff with bandwidth must be made in this configuration. The graph below illustrates the effect of capacitive load on open loop gain. Note that the compensation capacitor must have a voltage rating greater than or equal to the total rail to rail power supply voltage.

The MSK 158/159 has sufficient phase margin when compensated for unity gain to be stable with capacitive loads of at least 10nF. However, it is recommended that the parallel sum of the input and feedback resistor be 1000 ohms or less for closed loop gains of ten or less to minimize phase shift caused by the R-C network formed by the input resistor, feedback resistor and input capacitance. The user can tailor the performance of the MSK 159 to their application using the external compensation pins. The graphs of small signal gain and phase as well as the graphs of slew rate and power response demonstrate the effect of various forms of compensation. The compensation capacitor must be rated at 350 volts working voltage if maximum power supply voltages are used. The compensation resistor and capacitor lead lengths must be kept as short as possible to minimize spurious oscillations. A high quality NPO capacitor is recommended for the compensation capacitor.

External compensation is only necessary at gains 30V/V or less. For larger gains, the compensation resistor and capacitor may be omitted. 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 be stable.


Related products with the same datasheet
Some Part number from the same manufacture M.S. Kennedy
MSK159 Operational Amplifier, Same as MSK 158 With Heat Sink Tabs
MSK161 Operational Amplifier, High Power Amp W/programmable Current Limit
MSK162 Operational Amplifier, Ultra High Voltage Amp With Internal Comp
MSK164 Operational Amplifier, Ultra High Voltage Amp With Offset Null
MSK165 Ultra High Voltage Dual Operational Amplifier
MSK166 Ultra High Voltage Operational Amplifier
MSK171 High Power Dual Operational Amplifier
MSK173B High Power Dual Operational Amplifier
MSK181 High Current Operational Amplifier
MSK1900 High Performance High Voltage Video Display Driver
MSK1901 Video Amplifier, 24 Pin Quad Flatpack
MSK1902-0 Video Amplifier, 30 Pin PWR Flatpack
MSK1911 High Performance High Voltage Video Display Driver
MSK1922 Ultra High Speed/ Voltage Video Amplifier
MSK1932-0 Video Amplifier, 22 Pin Dip/flatpack
MSK1932D-0 Ultra High Speed/ Voltage Video Amplifier

MSK139 : Class C High Power op Amp

MSK5012TS : High Current, Super Low Dropout Adjustable Voltage Regulator

MSK5175-5TU : 5V, Very High Current, Low Dropout Voltage Regulator

MSK5250-1.5 : Linear Voltage Regulator, 3 Pin Ceramic Power Surface Mount

MSK5230-12 : HIGH Current, LOW Dropout Surface Mount Voltage Regulators

MSK5041-2.5EG : 9 A SWITCHING REGULATOR, 330 kHz SWITCHING FREQ-MAX, PDSO44 Specifications: Configuration / Function: Buck ; Package Type: Other, SOP-44 ; Life Cycle Stage: ACTIVE ; IOUT: 9 amps ; VIN: 5 volts ; fsw: 330 kHz ; Operating Temperature: -55 to 125 C (-67 to 257 F)

MSK5130-5.0ETS : ADJUSTABLE POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PSFM5 Specifications: Regulator Type: Low Dropout ; Output Polarity: Positive ; Output Voltage Type: Adjustable / Variable ; Package Type: Other, BENT DOWN, SIP-5 ; Life Cycle Stage: ACTIVE ; IOUT: 3 amps ; Dropout Voltage: 0.6000 volts

MSK5232-1.9HTS : 1.5 V FIXED POSITIVE LDO REGULATOR, 0.625 V DROPOUT, SSO3 Specifications: Regulator Type: Low Dropout ; Output Polarity: Positive ; Output Voltage Type: Fixed ; Package Type: Other, GULL WING, HERMETIC SEALED, SMT-3 ; Life Cycle Stage: ACTIVE ; Output Voltage: 1.47 to 1.53 volts ; IOUT: 3 amps ; VIN: 2.5 to 26 volts ; Dropout Voltage: 0.6250 volts

MSK5825-3.3KRH : 2.5 V FIXED POSITIVE LDO REGULATOR, 0.5 V DROPOUT, CDFP8 Specifications: Regulator Type: Low Dropout ; Output Polarity: Positive ; Output Voltage Type: Fixed ; Package Type: Other, HERMETICALLY SEALED, FP-8 ; Life Cycle Stage: ACTIVE ; Output Voltage: 2.38 to 2.62 volts ; IOUT: 3 amps ; VIN: 4.5 to 6.5 volts ; Dropout Voltage: 0.5000 volts

0-C     D-L     M-R     S-Z