ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
ULTRA HIGH VOLTAGE
OPERATIONAL AMPLIFIER
162/163
(315) 701-6751
4707 Dey Road Liverpool, N.Y. 13088
MIL-PRF-38534 QUALIFIED
FEATURES:
Monolithic MOS Technology
Low Cost
High Voltage Operation : 350V
Low Quiescent Current : 2mA Max.
High Output Current : 60mA Min.
No Second Breakdown
High Speed : 20V/µS Typ.
Internally Compensated For Gains >10 V/V
MSK163
MSK162
DESCRIPTION:
The MSK 162 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
162 is also an excellent low cost choice for high voltage piezo drive circuits. The MOSFET output frees the MSK 162 from
secondary breakdown limitations and power dissipation is kept to a minimum with a quiescent current rating of only 2mA. The
MSK 162 is packaged in a hermetically sealed 8 pin power dip and is internally compensated for closed loop gains of 10 V/V or
greater. For applications requiring heat sinking, the MSK 163 is available with bolt down tabs and is otherwise identical to the MSK
162 (see mechanical specifications). If the application calls for a gain of less than 10 V/V, refer to the MSK 158/159 data sheet.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
Piezo Electric Positioning
Electrostatic Deflection
Computer to Vacuum Tube Interface
Ultra High Voltage Op-Amp Applications
PIN-OUT INFORMATION
1
2
3
4
-Vcc
N/C
Output Drive
Current Sense
1
8
7
6
5
Inverting Input
Non-Inverting Input
N/C
+Vcc
Rev. B 7/00
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 Storage Temperature
TLD Lead Temperature
TC Case Operating Temperature
(MSK162B/163B)
(MSK162/163)
RTH Thermal Resistance (DC)
Junction to Case
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350V
60mA
120mA
±16V
±Vcc
150°C
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-65°C to +150°C
300°C
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-55°C to +125°C
-40°C to +85°C
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10°C/W
ELECTRICAL SPECIFICATIONS
Group A
Test Conditions 1
Parameter
MSK162B/163B
Subgroup
Min.
-
±50
Typ.
MSK162/163
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
Input Bias Current 4
VCM=0V
1,3
-
±5
±50
-
±5
±100
pA
2
-
-
-
-
-
nA
-
-
10
-
Ω
-
-
pF
-
Input Impedance 4
(DC)
Input Capacitance 4
Common Mode Rejection 4
Noise
VCM=±90VDC
±50
11
-
-
10
5
-
-
5
-
84
94
-
84
94
-
dB
-
50
-
50
-
µVRMS
V
11
1Hz≤f≤10Hz
-
IOUT=±40mA Peak
4
±138 ±141
-
±138 ±141
-
Output Current
VOUT=MAX
4
±60
±120
-
±60
±120
-
mA
Power Bandwidth 4
VOUT=280VPP
-
OUTPUT
Output Voltage Swing
Resistance
4
Settling Time to 0.1% 3 4
Capacitive Load
4
-
-
26
-
-
26
-
KHz
No Load,RCL=0Ω
-
-
150
-
-
150
-
Ω
10V Step
-
-
12
-
-
12
-
µS
AV=+1V/V
-
10
-
-
10
-
-
nF
CC=Open
4
10
20
-
10
20
-
V/µS
F=15Hz RL=5KΩ
4
94
106
-
94
106
-
dB
TRANSFER CHARACTERISTICS
Slew Rate
Open Loop Voltage Gain 4
NOTES:
1
2
3
4
5
6
7
8
Unless otherwise noted, ±VCC= ±150VDC.
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. B 7/00
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 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 used.
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 dependent and can not be predicted. Oscillation will cease when the device comes out of
current limit.
INPUT PROTECTION
Input protection curcuitry within the MSK 162/163 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 and the load. A
small tradeoff with bandwidth must be made in this configuration. The graph below illustrates the effect of capacitive load.
Note that the compensation capacitor must have a voltage rating greater than the total rail to rail power supply voltage.
STABILITY
The MSK 162/163 are internally compensated for closed loop
gains of 10 V/V or greater. The majority of applications the
MSK 162/163 are used in involve gains greater than 10 V/V
because the output is capable of swinging up to +/- 141V and
the maximum differential input voltage is only +/- 16V. A
large gain is necessary to make full use of the output voltage
swing capability of the amplifier when input voltages are small.
If closed loop gains of less than 10 V/V are required, refer to
the MSK 158/159 data sheets. The MSK 158/159 operational
amplifiers are identical to the MSK 162/163 except pins two
and six are compensation pins. The user can tailor op-amp
performance with the external connection of a series resistorcapacitor snubber network. 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 generally be stable.
3
Rev. B 7/00
TYPICAL PERFORMANCE CURVES
4
Rev. B 7/00
MECHANICAL SPECIFICATIONS
MSK163
MSK162
ESD TRIANGLE INDICATES PIN 1.
ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED.
ORDERING INFORMATION
Part
Number
MSK162
MSK162B
MSK163
MSK163B
Screening Level
Industrial
Military-Mil-PRF-38534
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 .B 7/00