MILPRF8 CERTIFIED M.S.KENNEDY CORP. 6 707 Dey Road Liverpool, N.Y. 088 () 7067 FEATURES: Internally Compensated For Gains > 0 V/V Monolithic MOS Technology High Voltage Operation : 0V Low Quiescent Current : Total High Output Current : 60 Min. Per Channel No Secondary Breakdown High Speed : 0V/µS Typ. Space Efficient Dual Amplifier Contact MSK for MILPRF8 Qualification Status DESCRIPTION: The MSK 6 is an ultra high voltage dual monolithic MOSFET operational amplifier ideally suited for electrostatic transducer and electrostatic deflection applications. With a total supply voltage rating of 0 volts and 60 of output current available from each amplifier, the MSK 6 is also an excellent low cost choice for high voltage piezo drive circuits. The MOSFET output frees the MSK 6 from secondary breakdown limitations and power dissipation is kept to a minimum with a quiescent current rating of only total. The MSK 6 is internally compensated for gains of 0 V/V or greater and is packaged in a hermetically sealed pin power dip with heat sink bolt down tabs. EQUIVALENT SCHEMATIC ULTRA HIGH VOLTAGE DUAL OPERATIONAL AMPLIFIER TYPICAL APPLICATIONS PINOUT INFORMATION High Voltage Piezo Electric Positioning Electrostatic Deflection Computer to Vacuum Tube Interface Ultra High Voltage Dual OpAmp Applications Bridge Amplifier 6 7 Vcc +Vcc Output Drive Current Sense NC Inverting Input Non Inverting Input 0 8 NonInverting Input Inverting Input NC Current Sense Output Drive +Vcc Vcc
ABSOLUTE MAXIMUM RATINGS 0 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 0V 60 0 ±6V ±Vcc 0 C TST TLD TC RTH Storage Temperature 6 C to +0 C Lead Temperature 00 C Case Operating Temperature (MSK6B/E) C to + C (MSK6) 0 C to +8 C Thermal Resistance (DC Each Amplifier) Junction to Case C/W ELECTRICAL SPECIFICATIONS Parameter Test Conditions Group A Subgroup MSK6B/E Min. Typ. Max. Min. MSK6 Typ. Max. Units STATIC Supply Voltage Range ±7 ±7 V ±. ±.0 ±. ±.0 Quiescent Current ±.0 ±.0 ±.0 ±. INPUT Offset Voltage Offset Voltage Drift Offset Voltage vs ±Vcc Input Bias Current VCM=0V, ± ±0 ±0 ± ±0 ±6 ± ± ±0 ±0 ± ±0 ± ±00 mv µv/ C µv/v pa, na Input Impedance Input Capacitance (DC) 0 0 Ω pf Common Mode Rejection Noise VCM=±0VDC Hz f 0Hz 8 0 8 0 db µvrms OUTPUT Output Voltage Swing Output Current Power Bandwidth Resistance Settling Time to 0.% Capacitive Load TRANSFER CHARACTERISTICS IOUT=±0 Peak VOUT=MAX VOUT=80VPP No Load RCL=0Ω 0V Step AV=+V/V ±8 ±60 0 ± ±0 6 0 ±8 ±60 0 ± ±0 6 0 V KHz Ω µs nf Slew Rate 0 0 0 0 V/µS Open Loop Voltage Gain F=Hz RL=KΩ 06 06 db NOTES: 6 7 8 0 Unless otherwise noted, ±VCC= VDC and specifications apply to each amplifier. Derate maximum supply voltage 0.V/ C below TC=+ C. No derating is needed above TC= C. AV=0V/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 and unless otherwise requested. Military grade devices ('B' suffix) shall be 00% tested to subgroups,, and. Subgroup and 6 testing available upon request. Subgroup, TC=+ C Subgroup, TC=+ C Subgroup,6 TA= C Electrical specifications are derated for power supply voltages less than VDC. Continuous operation at or above absolute maximum ratings may adversely effect the device performance and/or life cycle.
APPLICATION NOTES CURRENT LIMIT Current limit resistor value can be calculated as follows: RCL=/ILIM 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 minumum value of current limit resistance is ohms. The maximum practical value is 00 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 SAFE OPERATING AREA (SOA) The MOSFET output stage of this power operational amplifier has two distinct limitations:. The current handling capability of the die metallization.. 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 fastrecovery reverse biased diodes should be connected from the output to ground. 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 to pin and pin 0 to pin. INPUT PROTECTION Input protection circuitry within the MSK 6 will clip differential input voltages greater than 6 volts. The inputs are also protected against common mode voltages up to the supply rails as well as static discharge. There are 00 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. If severe overload conditions are expected, external input current limiting resistors are recommended. OUTPUT SNUBBER NETWORK A 00 ohm resistor and a 0pF capacitor connected in series from the output of the amplifier to ground is recommended for applications where load capacitance is less than 0pF. 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 00 ohm resistor may be added between the output of the amplifier (the junction of RCL and pin or ) 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. STABILITY The MSK 6 has sufficient phase margin when compensated for unity gain to be stable with capacitive loads of at least 0nF at gains of V/V or greater. However, it is recommended that the parallel sum of the input and feedback resistor be 000 ohms or less for closed loop gains of ten or less to minimize phase shift caused by the RC 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 %, the system will typically be stable.
TYPICAL PERFORMANCE CURVES
MECHANICAL SPECIFICATIONS ESD TRIANGLE INDICATES PIN WEIGHT=7. GRAMS ALL DIMENSIONS ARE ±0.00 INCHES UNLESS OTHERWISE LABELED. ORDERING INFORMATION Part Number MSK6 MSK6E MSK6B Screening Level Industrial Extended Reliability MilPRF8 Class H M.S. Kennedy Corp. 707 Dey Road, Liverpool, New York 088 Phone () 7067 FAX () 7067 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. Contact MSK for MILPRF8 qualification status.