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ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
HIGH VOLTAGE OPERATIONAL AMPLIFIER
0004
(315) 701-6751
4707 Dey Road Liverpool, N.Y. 13088
FEATURES:
MIL-PRF-38534 QUALIFIED
Pin Similar Replacement for the LH0004 Wide Supply Voltage Range: 10V to 50V Low Offset Current: 15nA High Voltage Gain: 200KV/V Internal Compensation Output Overload Protection Thermal Overload Protection
DESCRIPTION:
The MSK 0004 is a high voltage operational amplifier for use in high performance signal conditioning applications, as well as resolver excitation designs. These devices offer maximum reliability by providing internal output overload protection and thermal overload protection. Monolithic design and internal compensation make the MSK 0004 an excellent replacement for many general purpose operational amplifiers and specifically the LH0004. The MSK 0004 is internally compensated and can replace the LH0004 in most applications without any changes to existing circuitry. The device is packaged in an hermetically sealed 10 pin metal can.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS TYPICAL APPLICATIONS
Precision High Voltage Power Supply High Voltage Regulators Signal Conditioning Resolver Excitation Transducer Power Supply 1
PIN-OUT INFORMATION
1 2 3 4 5 NC +Input -VCC -Input NC 10 9 8 7 6 NC +VCC Output NC NC Rev. - 8/02
ABSOLUTE MAXIMUM RATINGS

ELECTRICAL SPECIFICATIONS
Parameter STATIC Supply Voltage Range 2 Quiescent Current INPUT Input Offset Voltage Input Offset Voltage Drift 2 Input Bias Current
2
Test Conditions 1
Group A Subgroup 1 2,3
MSK0004H/E Min. 10 74 40 35 2.5 100K Typ. 40 3.0 1.0 15 12 15 100 250 37 23 500 50 5.0 200K 16 Max. 50 4.5 4.5 6.0 7.0 30 50 30 19 Min. 10 74 40 35 2.5 100K -
MSK0004 Typ. 40 3.0 1.0 15 12 15 100 250 37 23 500 50 5.0 200K 16 Max. 45 5.0 7.5 50 40 22
AV=10
1 2,3 -
VCM=0V VCM=0V VCM=20VDC DC f=1KHz VOUT=35VPK No Load RL=1K VOUT=30VPK VOUT=30VPK f=10KHz Junction to Case @ 125C
1 2,3 1 4 4 4 -
Input Offset Current 2 Common Mode Rejection Ratio 2 Input Impedence 2 OUTPUT Output Voltage Swing Power Bandwidth 2 Output Resistance 2 Capacitive Load 2 TRANSFER CHARACTERISTICS Slew Rate Open Loop Voltage Gain 2 Thermal Resistance
NOTES:
1 2 3 4 5 6 Unless otherwise specified, VCC=40VDC and VIN=0V. 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 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 TC=+25C Subgroup 2,5 TC=+125C Subgroup 3,6 TA=-55C
2

TC

VCC VIN TC
Supply Voltage 50V Differential Input Voltage 40V Case Operating Temperature Range MSK0004H/E -55C to +125C MSK0004 -40C to +85C
TST TLD
Storage Temperature Range -65C to +150C Lead Temperature Range 300C (10 Seconds) Junction Temperature 175C

Units
V mA mA mV mV V/C nA nA nA dB M V KHz pF V/S V/V C/W
Rev. - 8/02
APPLICATION NOTES POWER SUPPLY BYPASSING
Both the negative and positive power supplies must be effectively decoupled with a high and low frequency bypass circuit to avoid power supply induced oscillation. An effective deecoupling scheme consists of a 0.1 microfarad ceramic capacitor in parallel with a 4.7 microfarad tantalum capacitor from each power supply pin to ground. Conditions: VCC=40VDC VO=20Vp Sine Wave, Freq.=1KHz RL=1K For a worst case analysis we treat the 20Vp sine wave as an 8 VDC output voltage. 1.) Find driver power dissipation PD=(VCC-VO) (VO/RL) =(40V-20V) (20V/1K) =400mW 2.) For conservative design, set TJ =+125C. 3.) For this example, worst case TA =+100C. 4.) RJC = 16C/W. 5.) RCS=0.15C/W for most thermal greases. 6.) Rearrange governing equation to solve for RSA: RSA= ((TJ - TA) / PD) - (RJC) - (RCS) = (125C - 100C)/0.4W - 16C/W - 0.15C/W =62.5 - 16.15 =46.4C/W The heat sink in this example must have a thermal resistance of no more than 46.4C/W to maintain a junction temperature of less than +125C.
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.
Thermal Model:
TYPICAL APPLICATION CIRCUIT
Governing Equation:
TJ = PD X (RJC + RCS + RSA) + TA Where TJ PD RJC RCS RSA TC TA TS = = = = = = = = Junction Temperature Total Power Dissipation Junction to Case Thermal Resistance Case to Heat Sink Thermal Resistance Heat Sink to Ambient Thermal Resistance Case Temperature Ambient Temperature Sink Temperature
REPLACING THE LH0004
The MSK 0004 is not an exact copy of the LM0004 but it is only slightly different. The MSK 0004 is internally compensated and is lower cost. Pins 1,5,6,7 and 10 are not connected internally in the MSK0004.
Example:
The 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.
3
Rev. - 8/02
TYPICAL PERFORMANCE CURVES
4
Rev. - 8/02
MECHANICAL SPECIFICATIONS
MSK0004
ALL DIMENSIONS ARE 0.010 INCHES UNLESS OTHERWISE LABELED.
MSK0004 H
ORDERING INFORMATION
SCREENING BLANK= INDUSTRIAL; E=EXTENDED RELIABILITY H= MIL-PRF-38534 CLASS H GENERAL PART NUMBER
The above example is a Military grade hybrid.
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.
M.S. Kennedy Corp.
5
Rev. - 8/02

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