ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
ULTRA HIGH VOLTAGE DUAL
OPERATIONAL AMPLIFIER
4707 Dey Road Liverpool, N.Y. 13088
165
(315) 701-6751
MIL-PRF-38534 QUALIFIED
FEATURES:
Internally Compensated For Gains > 10 V/V
Monolithic MOS Technology
High Voltage Operation : 350V
Low Quiescent Current : 4mA Total
High Output Current : 60mA Min. Per Channel
No Second Breakdown
High Speed : 40V/µS Typ.
Space Efficient Dual Amplifier
MSK165
DESCRIPTION:
The MSK 165 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 350 volts and 60mA of
output current available from each amplifier, the MSK 165 is also an excellent low cost choice for high voltage piezo
drive circuits. The MOSFET output frees the MSK 165 from secondary breakdown limitations and power dissipation
is kept to a minimum with a quiescent current rating of only 4mA total. The MSK 165 is internally compensated for
gains of 10 V/V or greater and is packaged in a hermetically sealed 14 pin power dip with heat sink bolt down tabs.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
High Voltage Piezo Electric Positioning
Electrostatic Deflection
Computer to Vacuum Tube Interface
Ultra High Voltage
Dual Op-Amp Applications
Bridge Amplifier
PIN-OUT INFORMATION
1
2
3
4
5
6
7
-Vcc 1
+Vcc 1
Output Drive 1
Current Sense 1
N/C
Inverting Input 2
Non -Inverting Input 2
1
14
13
12
11
10
9
8
Non-Inverting Input 1
Inverting Input 1
N/C
Current Sense 2
Output Drive 2
+Vcc 2
-Vcc 2
Rev. A 8/00
ABSOLUTE MAXIMUM RATINGS
VCC 2
±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
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TST
TLD
TC
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Storage Temperature
-65°C to +150°C
Lead Temperature
300°C
Case Operating Temperature
(MSK165B)
-55°C to +125°C
(MSK165)
-40°C to +85°C
Thermal Resistance (DC Each Amplifier)
Junction to Case
12°C/W
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350V
60mA
120mA
±16V
±Vcc
150°C
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RTH
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ELECTRICAL SPECIFICATIONS
MSK165B
Group A
Test Conditions 1
Parameter
Subgroup
Min.
-
±50
Typ.
MSK165
Units
Typ.
Max.
±150 ±175 ±50
±150
±175
V
Max.
Min.
STATIC
Supply Voltage Range 2 4 9
Quiescent Current
VIN=0V
1
-
±1.4
±2.0
-
±1.4
±2.0
mA
2
-
±2.0
±3.0
-
-
-
mA
3
-
±1.0
±2.1
-
-
-
mA
INPUT
Offset Voltage
VIN=0V
1
-
±15
±30
-
±15
±30
mV
Offset Voltage Drift 4
VIN=0V
2,3
-
±40
±65
-
±40
-
µV/°C
Offset Voltage vs ±Vcc 4
VIN=0V
1
-
±20
±32
-
±20
±32
µV/V
VCM=0V
1,3
-
±5
±50
-
±5
±100
pA
2
-
-
-
-
-
nA
-
-
10
-
Ω
-
-
pF
-
Input Bias Current
4
Input Impedance 4
(DC)
Input Capacitance 4
Common Mode Rejection 4
Noise
VCM=±90VDC
-
1Hz≤f≤10Hz
±50
11
-
-
10
5
-
-
5
-
84
94
-
84
94
-
dB
-
50
-
50
-
µVRMS
V
11
-
OUTPUT
Output Voltage Swing
Output Current
Power Bandwidth 4
Resistance 4
Settling Time to 0.1% 3 4
Capacitive Load
4
IOUT=±40mA Peak
4
±138 ±141
-
±138 ±141
-
VOUT=MAX
4
±60
±120
-
±60
±120
-
mA
VOUT=280VPP
-
-
26
-
-
26
-
KHz
No Load RCL=0Ω
-
-
150
-
-
150
-
Ω
10V Step
-
-
12
-
-
12
-
µS
AV=+1V/V
-
10
-
-
10
-
-
nF
4
20
40
-
10
20
-
V/µS
4
94
106
-
94
106
-
dB
TRANSFER CHARACTERISTICS
Slew Rate
Open Loop Voltage Gain 4
F=15Hz RL=5KΩ
NOTES:
1
2
3
4
5
6
7
8
Unless otherwise noted, ±VCC= ±150VDC and specifications apply to each amplifier.
Derate maximum supply voltage 0.5V/°C below TC=+25°C. No derating is needed above TC=25°C.
AV=-10V/V measured in false summing junction circuit.
Devices shall be capable of meeting the parameter, but need not be tested. Typical parameters are for reference only.
Industrial grade devices shall be tested to subgroups 1 and 4 unless otherwise requested.
Military grade devices ('B' suffix) shall be 100% tested to subgroups 1,2,3 and 4.
Subgroup 5 and 6 testing available upon request.
Subgroup
1,4
TC=+25°C
Subgroup
2,5
TC=+125°C
Subgroup 3,6
TA=-55°C
9 Electrical specifications are derated for power supply voltages less than ±50VDC.
2
Rev. A 8/00
APPLICATION NOTES
SAFE OPERATING AREA (SOA)
CURRENT LIMIT
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.
Current limit resistor value can be calculated as follows:
RCL=3/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 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
to pin 4 and pin 10 to pin 11.
INPUT PROTECTION
Input protection circuitry within the MSK 165 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.
OUTPUT SNUBBER NETWORK
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 or 11) 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 165 has sufficient phase margin when compensated for unity gain to be stable with capacitive loads of at
least 10nF at gains of 2V/V or greater. 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. 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 typically be stable.
3
Rev. A 8/00
TYPICAL PERFORMANCE CURVES
4
Rev. A 8/00
MECHANICAL SPECIFICATIONS
MSK165
ESD TRIANGLE INDICATES PIN 1.
ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED.
ORDERING INFORMATION
Part
Number
MSK165
MSK165B
Screening Level
Industrial
Military-Mil-PRF-38534
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.
5
Rev. A 8/00