ISO 9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
FEATURES:
FET INPUT
DIFFERENTIAL OP-AMP
032
(315) 701-6751
4707 Dey Road Liverpool, N.Y. 13088
Fast Slew Rate
Fast Settling Time
FET Input
Wide Bandwidth
Electrically Isolated
LH0032 Pin Compatible Upgrade
MIL-PRF-38534 CERTIFIED
DESCRIPTION:
The MSK 032 is a high speed, FET input, differential operational amplifier. Intended to replace the popular LH0032,
the MSK 032 offers improved performance, much greater consistency from lot to lot, and improved stability over its
operating temperature range.
The MSK 032's wide bandwidth, accuracy and output drive capability make it a superior choice for applications such
as video amplifiers, buffer amplifiers, comparator circuits and other high frequency signal transfer circuits. As with all
MSK products, the MSK 032 is conservatively specified and is available in military and industrial grades.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
Video Amplifiers
Buffer Amplifiers
Comparator Circuits
1
2
3
4
5
6
PIN-OUT INFORMATION
NC
Output Compensation
Compensation/Balance
Compensation/Balance
Inverting Input
Non-Inverting Input
1
7
8
9
10
11
12
NC
Case Connection
NC
Negative Power Supply
Output
Positive Power Supply
Rev. B 5/02
ABSOLUTE MAXIMUM RATINGS
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(Output Switches) (Junction to Case)
ELECTRICAL SPECIFICATIONS
Parameter
STATIC
Supply Voltage Range
2 7
Quiescent Current
INPUT
Input Offset Voltage
Input Offset Voltage Drift
Input Offset Adjust
Input Bias Current
Input Offset Current
Input Impedance
2
Power Supply Rejection Ratio
2
Common Mode Rejection Ratio
2
Input Noise Voltage
Equivalent Input Noise
OUTPUT
Output Voltage Swing
Output Current
Settling Time to 1%
1
Settling Time to 0.1%
2
Full Power Bandwidth
Bandwidth (Small Signal)
2
TRANSFER CHARACTERISTICS
Slew Rate Limit
Open Loop Voltage Gain
2
V
OUT
=±10V R
L
=510Ω
V
OUT
=±10V R
L
=1KΩ
4
4
2
Test Conditions
V
IN
=0V
Bal.Pins=NC V
IN
=0V A
V
=-10V/V
Bal.Pins=NC
V
IN
=0V
R
POT
=10KΩ To +V
CC
V
CM
=0V
Either Input
V
CM
=0V
F=DC
∆
V
CC
=±5V
F=DC
V
CM
=±10V
F=10Hz To 1KHz
F=1KHz
F≤5MH
Z
R
L
=510Ω
R
L
=510Ω
R
L
=1KΩ 10V step
R
L
=1KΩ 10V step
R
L
=510Ω Vo=±10V
R
L
=510Ω
NOTES:
1
2
3
4
5
6
AV=-1, 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 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.
Subgroup 5 and 6 testing available upon request.
Subgroup 1,4
T
A
=T
C
=+25°C
Subgroup 2,5
T
A
=T
C
=+125°C
Subgroup 3,6
T
A
=T
C
=-55°C
7 Electrical specifications are derated for power supply voltages other than ±15VDC.
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R
TH
±Vcc=±15VDC Unless Otherwise Specified
Group A
Subgroup
-
1
2,3
1
2,3
1
2,3
1
2,3
1
2,3
-
-
-
-
-
4
4
4
4
4
4
-
-
-
-
-
60
70
-
-
±10
±20
-
-
8
80
500
80
MSK 032B/E
Min.
±10
-
-
-
-
Typ.
±15
±15
±18
±0.5
±10
Max.
±18
±20
±25
±5
±25
Min.
±10
-
-
-
-
-
-
-
-
-
-
55
65
-
-
±10
±20
-
-
7
75
475
75
MSK 032
Typ.
±15
±15
-
±1
-
Adjust to Zero
-
±75
-
20
-
10
12
70
80
1.5
40
±12
±30
55
70
8
80
550
85
-
±300
-
150
-
-
-
-
-
-
-
-
65
100
-
-
-
-
Max.
±18
±22
-
±7
-
Units
V
mA
mA
mV
µV/°C
mV
mV
pA
nA
pA
nA
Ω
dB
dB
µVrms
nV√Hz
V
mA
nS
nS
MHz
MHz
V/µS
dB
Adjust to Zero
Adjust to Zero
±50
±0.2
10
0.1
10
12
70
80
1.5
40
±12
±30
50
60
9
90
600
90
±250
±10
100
5
-
-
-
-
-
-
-
60
90
-
-
-
-
2
Rev. B 5/02
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T
J
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±V
CC
I
OUT
V
IN
T
C
±18V
Supply Voltage
±40mA
Output Current
±30V
Differential Input Voltage
Case Operating Temperature Range
-55°C to +125°C
(MSK 032B/E)
-40°C to +85°C
(MSK 032)
187°C/W
Thermal Resistance
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T
ST
T
LD
Storage Temperature Range
Lead Temperature Range
(10 Seconds)
Junction Temperature
-65°C to +150°C
300°C
175°C
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.
Thermal Model:
Rθ
SA
= ((T
J
- T
A
)/P
D
) - (Rθ
JC
) - (Rθ
CS
).
= ((125°C-100°C) /0.13W) - 187° C/W - 0.15°C/W
= 192.3 - 187.15
= 5.2°C/W
The heat sink in this example must have a thermal resistance
of no more than 5.2°C/W to maintain a junction temperature
of no more than+125°C.
SLEW RATE
VS
. SLEW RATE LIMIT
SLEW RATE
response of the amplifier and is calculated from the full power
bandwidth frequency.
SLEW RATE LIMIT
dv/dt: The slew rate limit is based upon the amplifier's res-
ponse to a step input and is measured between 10% and 90%.
MSK measures T
R
orT
F
, whichever is greater at±10Vou
T
,
RL=510Ω
SRL= V
O
-20%
T
R
or T
F
SR = 2πVp
F: Slew rate is based upon the sinusoidal linear
COMPENSATION
Governing Equation:
T
J
=P
D
X
(R
θJC
+
R
θCS
+
R
θSA
)+T
A
Where
T
J=
Junction Temperature
P
D=
Total Power Dissipation
R
θJC=
Junction to Case Thermal Resistance
R
θCS=
Case to Heat Sink Thermal Resistance
R
θSA=
Heat Sink to Ambient Thermal Resistance
T
C
= Case Temperature
T
A
= Ambient Temperature
T
S
= Sink Temperature
The MSK 032, can be frequency compensated by connecting
an R-C snubber circuit from pin 3 to pin 4 as shown below.
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
R
L
=510Ω
For a worst case analysis we treat the +8Vp sine wave as an 8
VDC output voltage.
1.) Find driver power dissipation
P
D
= (Vcc-Vo) (Vo/R
L
)
= (16V
- 8V) (8V/510Ω)
=
125.5mW
2.) For conservative design, set T
J
=+125°C
3.) For this example, worst caseT
A
=+100°C
4.) Rθ
JC=
187°C/W from MSK 032B Data Sheet
5.) Rθ
CS=
0.15°C/W for most thermal greases
6.) Rearrange governing equation to solve for Rθ
SA
The recommended capacitor value is 0.01µF and the resis-
tor value can range from 2Ω to 500Ω. The effects of this R-C
snubber can be seen on the typical performance curve labeled
Slew Rate
VS.
Compensation Resistance. The graph clearly illus-
trates the decrease in transition time as snubber resistance in-
creases. This occurs because the high frequency components
of the input square wave are above the corner frequency of the
R-C snubber and are applied common mode to the bases of the
second differential pair, (pins 3 and 4). There is no differential
gain for these higher frequencies since the input signal is ap-
plied common mode. Without the high frequency components
appearing at the output, the slew rate and bandwidth of the op-
amp are limited. However, at the cost of speed and bandwidth
the user gains circuit stability. A good design rule to follow is: as
closed loop gain decreases, circuit stability decreases, therefore
snubber resistance should decrease to maintain stability and avoid
oscillation. The MSK 032 can also be compensated using the
standard LH0032 techniques.
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
decoupling scheme consists of a 0.1 microfarad ceramic capa-
citor in parallel with a 4.7 microfarad tantalum capacitor from
each power supply pin to ground.
3
Rev. B 5/02
PCB Design
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