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| ISO-9001 CERTIFIED BY DSCC M.S.KENNEDY CORP. INVERTING OPERATIONAL AMPLIFIER 738 (315) 701-6751 4707 Dey Road Liverpool, N.Y. 13088 MIL-PRF-38534 CERTIFIED FEATURES: Very Fast Settling Time Very Fast Slew Rate Wide Bandwidth Low Noise Very Accurate (Low Offset) DESCRIPTION: The MSK 738 is an inverting operational amplifier that exhibits an impressive combination of high speed and precision D.C. characteristics. The Op-amp's very fast slew rate, very fast settling time and wide bandwidth, along with its extremely low input offset voltage, offset drift and low noise, make it an outstanding performer. EQUIVALENT SCHEMATIC EQUIVALENT SCHEMATIC TYPICAL APPLICATIONS TYPICAL APPLICATIONS High Performance Data Aquisition Coaxial Line Driver Data Conversion Circuits High Speed Communications 1 2 3 4 5 6 1 PIN-OUT INFORMATION Compensation Negative Power Supply NC Inverting Input Non-Inverting Input Ground 7 8 9 10 11 12 Balance Balance Positive Power Supply NC Output Case Connection Rev. B 6/03 ABSOLUTE MAXIMUM RATINGS See Curve 150C ELECTRICAL SPECIFICATIONS Parameter STATIC Supply Voltage Range 2 Quiescent Current VIN=0V AV=-1V/V Thermal Resistance 2 INPUT Input Offset Voltage Input Offset Voltage Drift 2 Input Offset Adjust Bal. Pins=NC VIN=0V AV=-100V/V VIN=0V RPOT=10K To+VCC AV=-1V/V 1 2,3 1 2,3 Input Bias Current 7 Vcc=15V Unless Otherwise Specified Group A MSK 738B/E Typ. Max. Min. MSK 738 Typ. Max. Units Subgroup Min. Test Conditions 1 2,3 - 12 - 15 39 40 46 18 40 42 - 12 - 15 39 46 18 42 - Junction to Case Output Devices - 25 0.5 75 1 - 50 - 100 - Adjust to zero Adjust to zero 10 20 2 5 5 1 0.15 3.8 0.6 40 80 20 40 10 - Adjust to zero 20 10 5 2 0.2 4 0.7 60 30 20 - VCM=0V Either Input 1 2,3 1 2,3 Input Offset Current VCM=0V Input Impedance 2 2 F=DC Differential VCC=5V F= 0.1Hz To 10Hz 2 2 - Power Supply Rejection Ratio Input Noise Voltage 2 Input Noise Voltage Density Input Noise Current Density OUTPUT Output Voltage Swing Output Current Settling Time 1 2 F=1KHz F=1KHz RL=100 AV=-3V/V F20MHz AV=-3V/V TJ<150C 0.1% 10V step RL=100 Vo=10V RL=100 4 4 4 4 4 10 12 40 - 10 11.8 45 - 100 120 20 175 30 22 200 100 120 15 165 35 20 190 Full Power Bandwidth Bandwidth (Small Signal) 2 TRANSFER CHARACTERISTICS Slew Rate Open Loop Voltage Gain 2 VOUT=10V RL=100 Av=-1.5V/V RL=1K F=1KHz VOUT=10V 4 4 3200 3500 100 110 - 3500 95 3200 105 - NOTES: 1 2 3 4 5 6 AV= -1, 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. TA=TC=+25C Subgroup 1,4 TA=TC=+125C Subgroup 2,5 TA=TC=-55C Subgroup 3,6 7 Measurement taken 0.5 seconds after application of power using automatic test equipment. 2 Rev. B 6/03 VCC IOUT VIN TC Supply Voltage +18V Peak Output Current 200mA Differential Input Voltage 12V Case Operating Temperature Range (MSK 738B/E) -55C to+125C (MSK 738) -40C to +85C TST Storage Temperature Range TLD Lead Temperature Range (10 Seconds Soldering) PD Power Dissipation TJ Junction Temperature -65C to +150C 300C V mA mA C/W V V/C mV mV nA nA nA nA M V/V Vp-p nVHz pAHz V mA nS MHz MHz V/S dB APPLICATION NOTES HEAT SINKING To determine if a heat sink is necessary for your application and if so, what type, refer to the thermal model and governing equation below. The heat sink in this example must have a thermal resistance of no more than 8.5C/W to maintain a junction temperature of no more than +125C. Thermal Model: OFFSET NULL Typically, the MSK 738(B) has an input offset voltage of less than 25V. If it is desirable to adjust the offset closer to "zero", or to a value other than "zero", the circuit below is recommended. RP should be a ten-turn 10K potentiometer. Typical offset adjust is 5mV. Governing Equation: TJ=PD x (RJC + RCS + RSA) + TA Where TJ=Junction Temperature PD=Total Power Dissipation RJC=Junction to Case Thermal Resistance RCS=Case to Heat Sink Thermal Resistance RSA=Heat Sink to Ambient Thermal Resistance TC=Case Temperature TA=Ambient Temperature TS=Sink Temperature Potentiometer values ranging from 1K to 1M can be used with only a small amount of degradation (typically 0.15 to 0.25V/C) of input offset voltage drift. If the input offset voltage is to be trimmed to a value other than "zero", the following formula can be used to approximate the change in input offset voltage drift: VOSD=VOS (trimmed)/250 Recommended External Component Selection Guide APPROXIMATE DESIRED GAIN 1 1 1 1 1 RI(+) 499 330 169 100 90.9 100 RI(-) 1K 499 200 124 100 100 Rf(Ext) 1K 1K 1K 1K 1K 2K Cf 2 2 2 2 2 2 C1 1f 1f 1f 1f 1f 1f Example: This example demonstrates a worst case analysis for the op-amp output stage. This occurs when the output voltage is 1/2 the power supply voltage. Under this condition, maximum power transfer occurs and the output is under maximum stress. Conditions: VCC=16VDC VO=8Vp Sine Wave, Freq.=1KHz RL=100 For a worst case analysis we will treat the +8Vp sine wave as an 8VDC output voltage. 1.) Find Driver Power Dissipation PD=(VCC-VO) (VO/RL) =(16V-8V) (8V/100) =0.64W 2.) For conservative design, set TJ=+125C 3.) For this example, worst case TA=+90C 4.) RJC=46C/W from MSK 738B Data Sheet 5.) RCS=0.15C/W for most thermal greases 6.) Rearrange governing equation to solve for RSA RSA=((TJ-TA)/PD) - (RJC) - (RCS) =((125C -90C)/0.64W) - 45C/W - 0.15C/W =54.7 - 46.15 =8.5C/W 1 -1 -2 -5 -8 -10 -20 1 The positive input resistor is selected to minimize any bias current induced offset voltage. 2 The feedback capacitor will help compensate for stray input capacitance. The value of this capacitor can be dependent on individual applications. A 2 to 9 pf capacitor is usually optimum for most applications. 3 Rev. B 6/03 TYPICAL PERFORMANCE CURVES 4 Rev. B 6/03 MECHANICAL SPECIFICATIONS NOTE:Standard cover height: MSK 738 0.200 Max. Alternate lid heights available NOTE: ALL DIMENSIONS ARE 0.010 INCHES UNLESS OTHERWISE LABELED. ORDERING INFORMATION MSK738 B SCREENING BLANK=INDUSTRIAL; B=MIL-PRF-38534 CLASS H E=EXTENDED RELIABILITY GENERAL PART NUMBER 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. B 6/03 |
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