Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION
905 E. Walnut St., Garland, TX 75040 (972) 272-3571 Fax (972) 494-2281
www.micropac.com
E-MAIL:
hybridsales@micropac.com
05/17/01
ADVANCED DATA SHEET
42142
RADIATION TOLERANT
POWER OPERATIONAL AMPLIFIER
Mii
HYBRID MICROELECTRONICS
PRODUCTS DIVISION
Features:
Design Tested to 100 krad(Si) Total Dose
Hermetically Sealed in Metal Package
Performance over 55C to +125C
Wide Supply Voltage Range
High Output Current
Short Circuit Protection
Applications:
Satellite/Space
systems
Military/High Reliability Systems
Programmable Power Supplies
Solenoid
Driver
Servo Motor Amplifier
Synchro Power Amplifier
DESCRIPTION
The 42142 is a power operational amplifier designed for military and space applications where radiation tolerance is
required. Utilizing multi-chip hybrid construction, the 42142 power operational amplifier combines 10A load current
capability with the convenience of a monolithic operational amplifier. Output current limiting is provided using
external resistors. The 42142 power operational amplifier is supplied in an 8-pin hermetic flat package. This design
has demonstrated it will function with minimal degradation after exposure to 100 krad(Si) total dose. This device is
available as COTS, or screened to MIL-PRF-38534, Table C-IX, Class H or custom screening. Lead options
support both through-hole and surface-mount assembly.
ABSOLUTE MAXIMUM RATINGS:
Supply Voltage (V
S
) ............................................................................................................... 22 V
Input Voltage
(1)
......................................................................................................................... 22 V
Differential Input Voltage
(2)
........................................................................................................ 0.7 V
Peak Output Current
(3)
................................................................................................................ 10 A
Storage Temperature Range ......................................................................................... -65C to +150C
Operating Junction Temperature .................................................................................... -55C to +150C
Lead Solder Temperature for 10 seconds ........................................................................................ 300C
Power Dissipation
(4)
................................................................................................................... 95 W
Linear Derating Factor ........................................................................................................... 0.76 W/C
WEIGHT: ........................................................................................... .................... 15.2 grams (typical)
RECOMMENDED OPERATING CONDITIONS:
Parameter
Symbol
Min.
Max.
Units
Supply Voltage
V
S
8
20
VDC
Ambient Temperature
T
A
-55
125
C
Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION
905 E. Walnut St., Garland, TX 75040 (972) 272-3571 Fax (972) 494-2281
www.micropac.com
E-MAIL:
hybridsales@micropac.com
05/17/01
ADVANCED DATA SHEET
42142
Radiation Tolerant Power Operational Amplifier
ELECTRICAL SPECIFICATIONS (Pre-Irradiation)
V
S
= 15 V, T
C
= -55C to +125C unless otherwise specified
Parameter
Symbol
Min.
Typ.*
Max.
Units
Test Conditions
Input Offset Voltage
V
OS
25
200
V
Input Offset Voltage Drift
5
V/C
Input Bias Current
I
B+,
I
B-
15
80
nA
Input Offset Current
I
OS
10
75
nA
DC Open Loop Gain
A
VOL
100
126
dB
R
L
> 2 k
, V
O
= 10V
Common-Mode Input Voltage
Range
V
CM
10.3
12.3
V
Common-Mode Rejection Ratio
CMRR
100
dB
V
CM
= 9 VDC
R
L
= 10 k
Gain Bandwidth Product
(5)
GBW
1
MHz
Phase Margin
(5)
M
45
degree
R
L
= 10 k
(small signal)
Slew Rate
SR
2
V/
s
R
L
= 100
R
CL
= 0
Output Voltage Swing
V
O
12
10
V
R
L
= 10 k
R
L
= 1
Quiescent Current
I
Q
4
7
mA
R
L
=
Thermal Resistance
JA
30
C/W
TO-3 package
* All typical values are at T
C
= 25C
Notes:
1. For V
S
less than
22 V, the input voltage is not to exceed V
S
.
2. Input current must not exceed 25 mA
3. It is recommended that external current limiting resistors (
R
CL
0.068 ) be used to ensure
that 10 A is not exceeded. See Figures 1, 2 and 4 for R
CL
application information.
4. Case Temperature T
C
= 25C (see Figure 3).
5. Guaranteed by design.
Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION
905 E. Walnut St., Garland, TX 75040 (972) 272-3571 Fax (972) 494-2281
www.micropac.com
E-MAIL:
hybridsales@micropac.com
05/17/01
ADVANCED DATA SHEET
42142
Radiation Tolerant Power Operational Amplifier
Figure 1. Typical Short-Circuit Output Current Figure 2. Short-Circuit Output Current vs.
Case
vs. Current Limiting Resistors (
R
CL
) Temperature (typical data).
Figure 3. Maximum Average Power Dissipation
vs. Case Temperature (TO-3 package)
0
2
4
6
8
10
0
0.1
0.2
0.3
0.4
0.5
Resistance (ohm)
S
h
o
r
t
-
C
i
r
c
u
i
t Ou
tp
u
t
C
u
rre
n
t
(
A
)
T
C
= 25C
0
2
4
6
8
10
-55 -25
5
35
65
95 125
Temperature (C)
S
h
o
r
t
-
C
i
r
c
u
i
t Ou
tp
u
t
C
u
rre
n
t
(
A
)
R
CL
= .10 ohm
R
CL
= .33 ohm
0
20
40
60
80
100
-55 -25
5
35
65
95 125
Temperature (C)
I
n
t
e
r
n
a
l
P
o
w
e
r
Di
s
s
ip
at
io
n (
W
)
Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION
905 E. Walnut St., Garland, TX 75040 (972) 272-3571 Fax (972) 494-2281
www.micropac.com
E-MAIL:
hybridsales@micropac.com
05/17/01
ADVANCED DATA SHEET 42142
Radiation Tolerant Power Operational Amplifier
42142
SIGNAL
GROUND
LOAD
+VS
2
3
8
6
4
5
1
CL
+R
50 F
S
-V
50 F
-RCL
Figure 4. Application Information
Controlling the short circuit current to the minimum necessary for a given application maximizes
device protection and reliability.
Approximate values for the current limiting resistors can be determined from the equation:
R
CL
= (0.65/I
SC
- 0.01)
where I
SC
is the short circuit current limit in amperes at T
C
= 25C.
Current limits for positive and negative load currents can be set independently.
Current limiting resistors carry the full output current, therefore the short circuit current limit should be
used in determining resistor wattage. Lead lengths of the limiting resistors should be minimized and
highly inductive resistor types should be avoided.
Large bypass capacitors (50
F) are recommended across the power supply terminals if the application
requires large output current transients. Care should be taken to keep the power supply ground currents
from flowing through the signal ground path.
Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. HYBRID MICROELECTRONICS PRODUCTS DIVISION
905 E. Walnut St., Garland, TX 75040 (972) 272-3571 Fax (972) 494-2281
www.micropac.com
E-MAIL:
hybridsales@micropac.com
05/17/01
ADVANCED DATA SHEET 42142
Radiation Tolerant Power Operational Amplifier
TOTAL DOSE TEST RESULTS
Disclaimer: The data of 4 representative units irradiated in Cobalt-60 chamber is only typical of one lot of
operational amplifiers. Micropac does not guarantee performance of its Operational Amplifier to these
radiation levels. Individual lots have to be screened to guarantee the performance.
Figure 5. Input Offset Voltage vs Total Dose Figure 6. Input Offset Current vs Total Dose
Figure 7. Input (+) Bias Current vs Total Dose Figure 8. Input (-) Bias Current vs Total Dose
0
10
20
30
40
50
0
50
100
Total Dose, krad (Si)
I
n
p
u
t
O
f
f
s
e
t
C
u
rre
n
t, n
A
0
100
200
300
400
500
0
50
100
Total Dose, krad (Si)
I
n
p
u
t(
+
)
B
i
a
s
C
u
r
r
e
n
t, n
A
0
100
200
300
400
500
0
50
100
Total Dose, krad (Si)
I
n
p
u
t(-) B
i
a
s
C
u
rre
n
t
,
n
A
-20
-10
0
10
20
30
40
0
50
100
Total Dose, krad (Si)
I
n
pu
t
O
f
f
s
et
V
o
l
t
a
ge,
V
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