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LH0101 Power Operational Amplifier TL K 5558
LH0101
Power
Operational
Amplifier
February 1995
LH0101 Power Operational Amplifier
General Description
The LH0101 is a wideband power operational amplifier fea-
turing FET inputs internal compensation virtually no cross-
over distortion and rapid settling time These features make
the LH0101 an ideal choice for DC or AC servo amplifiers
deflection yoke drives programmable power supplies and
disk head positioner amplifiers The LH0101 is packaged in
an 8 pin TO-3 hermetic package rated at 60 watts with a
suitable heat sink
Features
Y
5 Amp peak 2 Amp continuous output current
Y
300 kHz power bandwidth
Y
850 mW standby power (
g
15V supplies)
Y
300 pA input bias current
Y
10 V ms slew rate
Y
Virtually no crossover distortion
Y
2 ms settling time to 0 01%
Y
5 MHz gain bandwidth
Schematic and Connection Diagrams
TL K 5558 1
TL K 5558 2
Top View
Order Numbers LH0101K
LH0101K-MIL LH0101CK
LH0101AK
LH0101AK-MIL or LH0101ACK
See NS Package Number K08A
Note Electrically connected internally no
connection should be made to pin
C1995 National Semiconductor Corporation
RRD-B30M115 Printed in U S A Absolute Maximum Ratings
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
(Note 5)
Supply Voltage V
S
g
22V
Power Dissipation at T
A
e
25 C P
D
5W
Derate linearly at 25 C W to zero at 150 C
Power Dissipation at T
C
e
25 C
62W
Derate linearly at 2 C W to zero at 150 C
Differential Input Voltage V
IN
g
40V but
k g
V
S
Input Voltage Range V
CM
g
20V but
k g
V
S
Thermal Resistance
See Typical Performance Characteristics
Peak Output Current (50 ms pulse) I
O(PK)
5A
Output Short Circuit Duration
(within rated power dissipation
R
SC
e
0 35X T
A
e
25 C)
Continuous
Operating Temperature Range T
A
LH0101AC LH0101C
b
25 C to
a
85 C
LH0101A LH0101
b
55 C to
a
125 C
Storage Temperature Range T
STG
b
65 C to
a
150 C
Maximum Junction Temperature T
J
150 C
Lead Temperature (Soldering
k
10 sec )
260 C
ESD rating to be determined
DC Electrical Characteristics
(Note 1) V
S
e
g
15V T
A
e
25 C unless otherwise noted
LH0101AC
LH0101C
Symbol
Parameter
Conditions
LH0101A
LH0101
Units
Min
Typ
Max
Min
Typ
Max
V
OS
Input Offset Voltage
1
3
5
10
mV
T
MIN s
T
A s
T
MAX
7
15
D
V
OS
D
P
D
Change in
(Note 2)
Input Offset Voltage
150
300
m
V W
with Dissipated Power
D
V
OS
D
T
Change in
V
CM
e
0
Input Offset Voltage
10
10
m
V C
with Temperature
I
B
Input Bias Current
300
1000
pA
T
A s
T
MAX
LH0101C AC
60
60
nA
LH0101 A
300
1000
I
OS
Input Offset Current
75
250
pA
T
A s
T
MAX
LH0101C AC
15
15
nA
LH0101 A
75
250
A
VOL
Large Signal
V
O
e
g
10V R
L
e
10X
50
200
50
200
V mV
Voltage Gain
V
O
Output Voltage Swing R
SC
e
0
R
L
e
100X
g
12
g
12 5
g
12
g
12 5
A
V
e a
1
R
L
e
10X
g
11 25
g
11 6
g
11 25
g
11 6
V
Note 3
R
L
e
5X
g
10 5
g
11
g
10 5
g
11
CMRR
Common Mode
D
V
IN
e
g
10V
85
100
85
100
Rejection Ratio
dB
PSRR
Power Supply
D
V
S
e
g
5V to
g
15V
85
100
85
100
Rejection Ratio
I
S
Quiescent Supply
28
35
28
35
mA
Current
2 AC Electrical Characteristics
(Note 1) V
S
e
g
15V T
A
e
25 C
LH0101
LH0101C
Symbol
Parameter
Conditions
LH0101A
LH0101AC
Units
Min
Typ
Max
Min
Typ
Max
e
n
Equivalent Input
f
e
1 kHz
25
25
nV
0
Hz
Noise Voltage
C
IN
Input Capacitance
f
e
1 MHz
3 0
3 0
pF
Power Bandwidth
b
3 dB
300
300
kHz
SR
Slew Rate
7 5
10
10
V ms
R
L
e
10X
(Note 4)
t
r
t
f
Small Signal Rise or
A
V
e a
1
200
200
ns
Fall Time
Small Signal Overshoot
10
10
%
GBW
Gain-Bandwidth Product
4 0
5 0
5 0
MHz
R
L
e
%
(Note 4)
t
s
Large Signal Settling
2 0
2 0
m
s
Time to 0 01%
THD
Total Harmonic Distortion
P
o
e
10W f
e
1 kHz
0 008
0 008
%
R
L
e
10X
Note 1
Specification is at T
A e
25 C Actual values at operating temperature may differ from the T
A e
25 C value When supply voltages are
g
15V quiescent
operating junction temperature will rise approximately 20 C without heat sinking Accordingly V
OS
may change 0 5 mV and I
B
and I
OS
will change significantly
during warm-ups Refer to the I
B
vs temperature and power dissipation graphs for expected values Power supply voltage is
g
15V Temperature tests are made
only at extremes
Note 2
Change in offset voltage with dissipated power is due entirely to average device temperature rise and not to differential thermal feedback effects Test is
performed without any heat sink
Note 3
At light loads the output swing may be limited by the second stage rather than the output stage See the application section under Output swing
enhancement for hints on how to obtain extended operation
Note 4
These parameters are sample tested to 10% LTPD
Note 5
Refer to RETS0101AK for the LH0101AK military specifications and RETS0101K for the LH0101K military specifications
3 Typical Performance Characteristics
Maximum Power Dissipation
Safe Operating Area
Current
Quiescent Power Supply
Input Bias Current
Warm-up
Input Bias Current after
Voltage Range
Input Common-Mode
Response (open loop)
Small Signal Frequency
vs Frequency
Output Voltage Swing
Ratio vs Frequency
Common-Mode Rejection
Ratio vs Frequency
Power Supply Rejection
Settling Time
Distortion vs Frequency
Total Harmonic
TL K 5558 3
4 Typical Performance Characteristics
(Continued)
Distortion vs Gain
Total Harmonic
Equivalent Input Noise Voltage
with Swing Enhancement
Output Voltage Swing
Load Resistance
Output Voltage Swing vs
Open-Loop Output Resistance
Resistance vs Frequency
Open-Loop Output
vs R
SC
Short Circuit Current
TL K 5558 4
Small Signal Pulse Response (No Load)
TL K 5558 5
Large Signal Pulse Response (R
L
e
10X)
TL K 5558 6
5 Application Hints
Input Voltages
The LH0101 operational amplifier contains JFET input de-
vices which exhibit high reverse breakdown voltages from
gate to source or drain This eliminates the need for input
clamp diodes so that high differential input voltages may be
applied without a large increase in input current However
neither input voltage should be allowed to exceed the nega-
tive supply as the resultant high current flow may destroy
the unit
Exceeding the negative common-mode limit on either input
will cause a reversal of the phase to the output and force
the amplifier output to the corresponding high or low state
Exceeding the negative common-mode limit on both inputs
will force the amplifier output to a high state In neither case
does a latch occur since raising the input back within the
common-mode range again puts the input stage and thus
the amplifier in a normal operating mode
Exceeding the positive common-mode limit on a single input
will not change the phase of the output however if both
inputs exceed the limit the output of the amplifier will be
forced to a high state
These amplifiers will operate with the common-mode input
voltage equal to the positive supply In fact the common-
mode voltage may exceed the positive supply by approxi-
mately 100 mV independent of supply voltage and over the
full operating temperature range The positive supply may
therefore be used as a reference on an input as for exam-
ple in a supply current monitor and or limiter
With the LH0101 there is a temptation to remove the bias
current compensation resistor normally used on the non-in-
verting input of a summing amplifier Direct connection of
the inputs to ground or a low-impedance voltage source is
not recommended with supply voltages greater than 3V
The potential problem involves loss of one supply which can
cause excessive current in the second supply Destruction
of the IC could result if the current to the inputs of the de-
vice is not limited to less than 100 mA or if there is much
more than 1 mF bypass on the supply buss
Although difficulties can be largely avoided by installing
clamp diodes across the supply lines on every PC board a
conservative design would include enough resistance in the
input lead to limit current to 10 mA if the input lead is pulled
to either supply by internal currents This precaution is by no
means limited to the LH0101
Layout Considerations
When working with circuitry capable of resolving pico-am-
pere level signals leakage currents in circuitry external to
the op amp can significantly degrade performance High
quality insulation is a must (Kel-F and Teflon rate high)
Proper cleaning of all insulating surfaces to remove fluxes
and other residues is also required This includes the IC
package as well as sockets and printed circuit boards
When operating in high humidity environments or near 0 C
some form of surface coating may be necessary to provide
a moisture barrier
The effects of board leakage can be minimized by encircling
the input circuitry with a conductive guard ring operated at a
potential close to that of the inputs
Electrostatic shielding of high impedance circuitry is advisa-
ble
Error voltages can also be generated in the e