ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
INVERTING
OPERATIONAL AMPLIFIER
4707 Dey Road Liverpool, N.Y. 13088
738
(315) 701-6751
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
PIN-OUT INFORMATION
1
2
3
4
5
6
High Performance Data Aquisition
Coaxial Line Driver
Data Conversion Circuits
High Speed Communications
1
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
±VCC
IOUT
VIN
TC
Supply Voltage
+18V
Peak Output Current
±200mA
Differential Input Voltage
±12V
Case Operating Temperature Range
(MSK 738B/E)
-55°C to+125°C
(MSK 738)
-40°C to +85°C
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
TST Storage Temperature Range
TLD Lead Temperature Range
(10 Seconds Soldering)
PD Power Dissipation
TJ Junction Temperature
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
-65°C to +150°C
300°C
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
See Curve
150°C
○
○
○
ELECTRICAL SPECIFICATIONS
±Vcc=±15V Unless Otherwise Specified
Group A
Test Conditions
Parameter
○
○
MSK 738B/E
Subgroup Min.
MSK 738
Typ.
Max.
Min.
Typ.
Max.
Units
STATIC
-
±12
±15
±18
±12
±15
±18
V
VIN=0V
1
-
±39
±40
-
±39
±42
mA
A V=-1V/V
2,3
-
±40
±42
-
-
-
mA
Junction to Case Output Devices
-
-
46
-
-
46
-
°C/W
Bal. Pins=NC VIN=0V AV=-100V/V
1
-
±25
±75
-
±50
±100
µV
VIN=0V
2,3
-
±0.5
±1
-
-
-
µV/°C
RPOT=10KΩ To+VCC AV=-1V/V
1
Adjust to zero
2,3
Adjust to zero
Supply Voltage Range 2
Quiescent Current
Thermal Resistance 2
INPUT
Input Offset Voltage
Input Offset Voltage Drift 2
Input Offset Adjust
Input Bias Current
7
Input Offset Current
Input Impedance
-
-
mV
±40
-
±20
±60
nA
±80
-
-
-
nA
2
20
-
10
30
nA
40
-
-
-
nA
1
-
±10
Either Input
2,3
-
±20
V CM=0V
1
-
5
-
-
5
-
-
5
-
MΩ
∆V CC =±5V
-
-
1
10
-
2
20
µV/V
F= 0.1Hz To 10Hz
-
-
0.15
-
-
0.2
-
µVp-p
2
F=1KHz
-
-
3.8
-
-
4
-
nV√Hz
2
F=1KHz
-
-
0.6
-
-
0.7
-
pA√Hz
RL=100Ω AV=-3V/V F≤20MHz
4
±10
±12
-
±10
±11.8
-
V
AV=-3V/V TJ<150°C
4
±100 ±120
-
±100 ±120
-
mA
0.1% 10V step
4
-
30
40
-
35
45
nS
RL=100Ω Vo=±10V
4
20
22
-
15
20
-
MHz
RL=100Ω
4
175
200
-
165
190
-
MHz
VOUT=±10V RL=100Ω Av=-1.5V/V
4
3200 3500
-
3500
3200
-
V/µS
4
100
-
95
105
-
dB
2
2
Input Noise Current Density
-
V CM=0V
2,3
2
Input Noise Voltage Density
mV
F=DC Differential
Power Supply Rejection Ratio
Input Noise Voltage
Adjust to zero
OUTPUT
Output Voltage Swing
Output Current
Settling Time
1
2
Full Power Bandwidth
Bandwidth (Small Signal) 2
TRANSFER CHARACTERISTICS
Slew Rate
Open Loop Voltage Gain
2
RL=1KΩ F=1KHz
V OUT=±10V
110
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=+25°C
Subgroup 1,4
TA=TC=+125°C
Subgroup 2,5
TA=TC=-55°C
Subgroup 3,6
7 Measurement taken 0.5 seconds after application of power using automatic test equipment.
2
Rev. B 6/03
APPLICATION NOTES
HEAT SINKING
The heat sink in this example must have a thermal resistance of
no more than 8.5°C/W to maintain a junction temperature of no
more than +125°C.
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:
OFFSET NULL
Typically, the MSK 738(B) has an input offset voltage of less than
±25µV. 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 10KΩ potentiometer. Typical offset adjust is
±5mV.
Governing Equation:
TJ=PD x (RθJC + RθCS + RθSA) + TA
Where
TJ=Junction Temperature
PD=Total Power Dissipation
RθJC=Junction to Case Thermal Resistance
RθCS=Case to Heat Sink Thermal Resistance
RθSA=Heat Sink to Ambient Thermal Resistance
TC= Case Temperature
TA=Ambient Temperature
TS=Sink Temperature
Potentiometer values ranging from 1KΩ to 1MΩ can be used with
only a small amount of degradation (typically 0.15 to 0.25µV/°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
Example:
1
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.
1
1
1
1
Conditions:
V CC =±16VDC
VO=±8Vp Sine Wave, Freq.=1KHz
RL=100Ω
1
-1
-2
-5
-8
-10
-20
RI(+)
RI(-)
Rf(Ext)
Cf
C1
499Ω
330Ω
169Ω
100Ω
90.9Ω
100Ω
1KΩ
499Ω
200Ω
124Ω
100Ω
100Ω
1KΩ
1KΩ
1KΩ
1KΩ
1KΩ
2KΩ
2
1µf
1µf
1µf
1µf
1µf
1µf
2
2
2
2
2
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/100Ω)
=0.64W
2.) For conservative design, set TJ=+125°C
3.) For this example, worst case TA=+90°C
4.) RθJC=46°C/W from MSK 738B Data Sheet
5.) RθCS=0.15°C/W for most thermal greases
6.) Rearrange governing equation to solve for RθSA
RθSA=((TJ-TA)/PD) - (RθJC) - (RθCS)
=((125°C -90°C)/0.64W) - 45°C/W - 0.15°C/W
=54.7 - 46.15
=8.5°C/W
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