Elantec ELH0101K Power operational amplifier Datasheet

Power Operational Amplifier
Features
General Description
# 5A peak, 2A continuous output
current
# 10 V/ms slew rate
# 300 kHz power bandwidth
# 850 mW standby power ( g 15V
supplies)
# 300 pA input bias current
# Virtually no crossover distortion
# 2 ms settling time to 0.01%
# 5 MHz gain bandwidth
# MIL-STD-883 devices 100%
manufactured in U.S.A.
The ELH0101 is a wideband power operational amplifier featuring FET inputs, internal compensation, virtually no crossover
distortion, and rapid settling time. These features make the
ELH0101 an ideal choice for DC or AC servo amplifiers, deflection yoke drivers, programmable power supplies, and disk head
positioner amplifiers.
Ordering Information
Equivalent Schematic
Part No.
ELH0101/883/8508901/2YX
ELH0101/883/8508901/2YX
TAB WIDE
Elantec facilities comply with MIL-I-45208A and other applicable quality specifications. Elantec’s Military devices are 100%
fabricated and assembled in our rigidly controlled, ultra-clean
facilities in Milpitas, California. For additional information on
Elantec’s Quality and Reliability Assurance policy and procedures request brochure QRA-1.
Temp. Range Package OutlineÝ
ELH0101AK/883B b 55§ C to a 125§ C
TO-3
MDP0003
ELH0101K/883B b 55§ C to a 125§ C
TO-3
MDP0003
8508901YX and 8508902YX are the SMD
versions of this device.
Connection Diagram
Note: Electrically connected internally.
No connection should be made to pin.
0101 – 2
Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a ‘‘controlled document’’. Current revisions, if any, to these
specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation. Patent pending.
© 1985 Elantec, Inc.
December 1994 Rev H
0101 – 1
Top View
ELH0101/883/8508901/2YX
Power Operational Amplifier
Absolute Maximum Ratings
VS
PD
PD
Supply Voltage
ELH0101, ELH0101A
Power Dissipation at TA e 25§ C
Derate linearly at 25§ C/W
to zero at 150§ C
Power Dissipation at TC e 25§ C
Derate linearly at 2§ C/W
to zero at 150§ C
Differential Input Voltage
ELH0101, ELH0101A
VIN
Input Voltage Range
g 20V but k g VS
ELH0101, ELH0101A
Peak Output Current (50 ms pulse)
5A
Output Short Circuit Duration
(within rated power dissipation,
RSC e 0.35X, TA e 25§ C)
Continuous
Operating Temperature Range:
b 55§ C to a 125§ C
ELH0101, ELH0101A
Maximum Junction Temperature
150§ C
b 65§ C to a 150§ C
Storage Temperature
Lead Temperature
(Soldering, 10 seconds)
300§ C
g 22V
5W
62W
TA
TJ
TST
g 40V but k g VS
Important Note:
All parameters having Min/Max specifications are guaranteed. The Test Level column indicates the specific device testing actually
performed during production and Quality inspection. Elantec performs most electrical tests using modern high-speed automatic test
equipment, specifically the LTX77 Series system. Unless otherwise noted, all tests are pulsed tests, therefore TJ e TC e TA.
Test Level
I
II
III
IV
V
Test Procedure
100% production tested and QA sample tested per QA test plan QCX0002.
100% production tested at TA e 25§ C and QA sample tested at TA e 25§ C ,
TMAX and TMIN per QA test plan QCX0002.
QA sample tested per QA test plan QCX0002.
Parameter is guaranteed (but not tested) by Design and Characterization Data.
Parameter is typical value at TA e 25§ C for information purposes only.
DC Electrical Characteristics (Note 1) VS e g 15V, TA e 25§ C, VCM e 0V
Description
ELH0101
Test Conditions
Min
VOS
DVOS/DPD
DVOS/DT
IB
Input Offset
Voltage
Change in Input
Offset Voltage with
Dissipated Power
ELH0101A
Typ
Max
1
10
TMIN s TA s TMAX,
ELH0101
Min
Max
Test
Level
Units
Typ
1
3
I
mV
7
I
mV
15
(Note 2)
Change in Input
Offset Voltage with
Temperature
Input Bias Current
TA s TMAX,
ELH0101
2
150
150
V
mV/W
10
10
V
mV/§ C
1,000
300
I
pA
1,000
300
I
nA
TD is 2.3in
Parameter
ELH0101/883/8508901/2YX
Power Operational Amplifier
Parameter
Description
ELH0101
Test Conditions
Min
IOS
Input Offset
Current
Typ
TA s TMAX,
ELH0101, A
AVOL
Large Signal
Voltage Gain
VO e g 10V, RL e 10X
VO
Output Voltage
Swing
ELH0101A
Test
Level
Units
Max
250
75
I
pA
250
75
I
nA
Max
Min
Typ
50
200
50
200
I
V/mV
RSC e 0X, AV e 1,
RL e 100X (Note 3)
g 11.7
g 12.5
g 11.7
g 12.5
I
V
RSC e 0X, AV e 1,
RL e 10X (Note 3)
g 11
g 11.6
g 11
g 11.6
I
V
RSC e 0X, AV e 1,
RL e 5X (Note 3)
g 10.5
g 11
g 10.5
g 11
I
V
85
100
85
100
I
dB
CMRR
Common-Mode
Rejection Ratio
VIN e g 10V
PSRR
Power Supply
Rejection Ratio
g 5V s VS s g 15V
85
100
85
100
I
dB
a 5V s VS( a ) s a 15V,
VS(b) e b15V
80
110
80
110
I
dB
b 5V t VS( b ) t b 15V,
VS( a ) e a 15V
80
95
80
95
I
dB
I
mA
Test
Level
Units
IS
Supply Current
28
35
28
35
TD is 3.5in
DC Electrical Characteristics (Note 1) VS e g 15V, TA e 25§ C, VCM e 0V Ð Contd.
Parameter
Description
ELH0101
Test Conditions
Min
en
Equivalent Input
Noise Voltage
f e 1 kHz
CIN
Input Capacitance
f e 1 MHz
PBW
Power Bandwidth,
b 3 dB
RL e 10X, AV e 1
SR
Slew Rate
RL e 10X, AV e 1
ELH0101AK
tr, tf
Small Signal Rise
or Fall Time
RL e 10X, AV e 1
Small Signal
Overshoot
RL e 10X, AV e 1
7.5
3
Typ
ELH0101A
Max
Min
Typ
Max
25
25
V
nV/0Hz
3
3
V
pF
300
300
V
kHz
10
I
Vms
200
200
V
ns
10
10
V
%
10
7.5
TD is 2.2in
AC Electrical Characteristics VS e g 15V, TA e TC e TJ e 25§ C
ELH0101/883/8508901/2YX
Power Operational Amplifier
Parameter
Description
GBW
Gain-Bandwidth
Product
RL e % , AV e 1
ELH0101AK
tS
Large Signal
Settling Time
(0.01%)
RL e % , AV e 1
Total Harmonic
Distortion
f e 1 kHz, PO e 0.5W,
RL e 10X
THD
ELH0101
Test Conditions
ELH0101A
Test
Level
Units
5
I
MHz
2
2
V
ms
0.008
0.008
V
%
Min
Typ
4
5
Max
Min
Typ
4
Max
Note 1: Specification is at TA e 25§ C. Actual values at operating temperature may differ from the TA e 25§ C value. When supply
voltages are g 15V, quiescent operating junction temperature will rise approximately 20§ C without heatsinking. Accordingly,
VOS may change 0.5 mV and IB and IOS will change significantly during warm-ups. Refer to IB vs. temperature and power
dissipation graphs for expected values.
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 heatsink.
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. RSC is the current sense resistor.
4
TD is 1.5in
AC Electrical Characteristics VS e g 15V, TA e TC e TJ e 25§ C Ð Contd.
ELH0101/883/8508901/2YX
Power Operational Amplifier
Typical Performance Curves
Power Dissipation
Safe Operating Area
Quiescent Power Supply
Current
Input Bias Current
Input Bias Current After
Warm-up
Input Common-Mode
Voltage Range
Open-Loop Small Signal
Frequency Response
Output Voltage Swing vs
Frequency
Common-Mode Rejection
Ratio vs Frequency
0101 – 3
5
ELH0101/883/8508901/2YX
Power Operational Amplifier
Typical Performance Curves Ð Contd.
Power Supply Rejection
Ratio vs Frequency
Settling Time
Total Harmonic Distortion
vs Frequency
Total Harmonic Distortion
vs Gain
Equivalent Input Noise
Voltage
Output Voltage Swing with
Swing Enhancement
Output Voltage Swing vs
Load Resistance
Open-Loop Output
Resistance
Open-Loop Output
Resistance vs Frequency
0101 – 4
6
ELH0101/883/8508901/2YX
Power Operational Amplifier
Typical Performance Curves Ð Contd.
0101 – 5
Typical Applications
High Power Voltage Follower
High Power Voltage Follower
with Swing Enhancement
0101 – 6
0101 – 7
Restricting Outputs to Positive Voltage Only
Generating a Split Supply
from a Single Voltage Supply
0101 – 8
0101 – 9
7
ELH0101/883/8508901/2YX
Power Operational Amplifier
Typical Applications Ð Contd.
g 5 to g 35 Power Source or Sink
CRT Deflection Yoke Driver
0101 – 11
0101 – 10
DC Servo Amplifier
High Current Source/Sink
0101 – 12
0101 – 13
8
ELH0101/883/8508901/2YX
Power Operational Amplifier
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 device is
not limited to less than 100 mA or if there is
much more than 1 mF bypass on the supply bus.
Applications Information
Input Voltages
The ELH0101 operational amplifier contains
JFET input devices 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 negative supply as the resultant
high current flow may destroy the unit.
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 ELH0101.
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.
Layout Considerations
When working with circuitry capable of resolving
picoampere 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.
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.
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.
These amplifiers will operate with the commonmode input voltage equal to the positive supply.
In fact, the common-mode voltage may exceed
the positive supply by approximately 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 example, in a supply current monitor and/
or limiter.
Electrostatic shielding of high impedance circuitry is advisable.
Error voltages can also be generated in the external circuitry. Thermocouples formed between dissimilar metals can cause hundreds of microvolts
of error in the presence of temperature gradients.
With the ELH0101 there is a temptation to remove the bias current compensation resistor normally used on the non-inverting 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
Since the ELH0101 can deliver large output currents, careful attention should be paid to power
supply, power supply bypassing and load currents. Incorrect grounding of signal inputs and
load can cause significant errors.
9
ELH0101/883/8508901/2YX
Power Operational Amplifier
Applications Information Ð Contd.
Thermal Resistance
Every attempt should be made to achieve a single point ground system as shown in the figure
below.
The thermal resistance between two points of a
conductive system is expressed as:
i12 e
T 1 b T2
§ C/W
PD
(1)
where subscript order indicates the direction of
heat flow. A simplified heat transfer circuit for a
cased semiconductor and heatsink system is
shown in the figure below.
The circuit is valid only if the system is in thermal equilibrium (constant heat flow) and there
are, indeed, single specific temperatures, TJ, TC,
and TS, (no temperature distribution in junction,
case, or heatsink). Nevertheless, this is a reasonable approximation of actual performance.
0101 – 14
Bypass capacitor CBX should be used if the lead
lengths of bypass capacitors CB are long. If a single point ground system is not possible, keep signal, load, and power supply from intermingling
as much as possible. For further information on
proper grounding techniques refer to ‘‘Grounding
and Shielding Techniques in Instrumentation’’
by Morrison, and ‘‘Noise Reduction Techniques
in Electronic Systems’’ by Ott (both published
by John Wiley and Sons).
0101 – 15
*Short circuit current will be limited to approximately
0.6
.
RSC
The junction-to-case thermal resistance, iJC,
specified in the data sheet depends upon the material and size of the package, die size and thickness, and quality of the die bond to the case or
lead frame. The case-to-heatsink thermal resistance, iCS, depends on the mounting of the device
to the heatsink and upon the area and quality of
the contact surface. Typical iCS for a TO-3 package is 0.5§ C/W to 0.7§ C/W, and 0.3§ C/W to
0.5§ C/W using silicone grease.
Leads or PC board traces to the supply pins,
short circuit current limit pins, and the output
pin must be substantial enough to handle the
high currents that the ELH0101 is capable of
producing.
Short Circuit Current Limiting
Should current limiting of the output not be necessary, SC a should be shorted to V a and SC b
should be shorted to V b . Remember that the
short circuit current limit is dependent upon the
total resistance seen between the supply and current limit pins. This total resistance includes the
desired resistor plus leads, PC Board traces, and
solder joints.* Assuming a zero TCR current limit resistor, typical temperature coefficient of the
short circuit will be approximately 0.3%.
The heatsink to ambient thermal resistance, iSA,
depends on the quality of the heatsink and the
ambient conditions.
10
ELH0101/883/8508901/2YX
Power Operational Amplifier
Some inductive loads may cause output stage oscillation. A 0.01 mF ceramic capacitor in series
with a 10X resistor from the output to ground
will usually remedy this situation.
Application Information Ð Contd.
Cooling is normally required to maintain the
worst case operating junction temperature, TJ, of
the device below the specified maximum value,
TJ(MAX). TJ can be calculated from known operating conditions. Rewriting equation (1), we find:
iJA e
TJ b TA
PD
§ C/W
TJ e TA a PDiJA § C
Where: PD e (VS b VOUT) IOUT a l V g
(V b ) l IQ
iJA e iJC a iCS a iSA and
VS e Supply Voltage
0101 – 16
Capacitive loads may be compensated for by traditional techniques. (See ‘‘Operational Amplifiers: Theory and Practice’’ by Roberge, published
by Wiley.)
iJC for the ELH0101 is typically 2§ C/W.
Stability and Compensation
As with most amplifiers, care should be taken
with lead dress, component placement and supply decoupling in order to ensure stability. For
example, resistors from the output to an input
should be placed with the body close to the input
to minimize ‘‘pickup’’ and maximize the frequency of the feedback pole by minimizing the capacitance from the input to ground.
A feedback pole is created when the feedback
around any amplifier is resistive. The parallel resistance and capacitance from the input of the
device (usually the inverting input) to AC
ground set the frequency of the pole. In many
instances the frequency of this pole is much
greater than the expected 3 dB frequency of the
closed loop gain and consequently there is negligible effect on stability margin. However, if the
feedback pole is less than approximately six
times the expected 3 dB frequency, a lead capacitor should be placed from the output to the input
of the op amp. The value of the added capacitor
should be such that the RC time constant of this
capacitor and the resistance it parallels is greater
than or equal to the original feedback pole time
constant.
0101 – 17
A similar but alternative technique may be used
for the ELH0101.
0101 – 18
11
ELH0101/883/8508901/2YX
Power Operational Amplifier
amp must be appropriately compensated to account for the additional loop gain.
Output Swing Enhancement
When the feedback pin is connected directly to
the output, the output voltage swing is limited
by the driver stage and not by output saturation.
Output swing can be increased by taking gain in
the output stage as shown below in the High
Power Voltage Follower with Swing Enhancement. Whenever gain is taken in the output
stage, either the output stage, or the entire op
Output Resistance
The open-loop output resistance of the ELH0101
is a function of the load current. No-load output
resistance is approximately 10X. This decreases
to under an X for load currents exceeding
100 mA.
Burn-In Circuit
0101 – 19
12
ELH0101/883/8508901/2YX
ELH0101 Macromodel
* Connections: a input
b Input
*
l
*
Va
l
l
*
Isc a
l
l
l
*
Feedback
l
l
l
l
*
Vb
l
l
l
l
l
*
l
l
l
l
l
l Iscb
*
l
l
l
l
l
l l Output
*
l
l
l
l
l
l l l
* em0101
6
5
2
1
3
7
8
4
.subckt buffer 21
2
1
3
7
8
4
* Resistors
r1 3 27 10
r2 26 3 10
r3 30 7 50
r4 2 23 50
r5 29 7 2K
r6 2 22 2K
r7 27 28 10
r8 24 26 10
* Transistors
q1 4 30 8 qnd
d1 8 4 dclamp
q2 4 23 1 qpd
d2 4 1 dclamp
q3 7 21 22 qp
q4 23 22 24 qn
q5 21 21 26 qn
q6 23 1 2 qp
q7 2 21 29 qn
q8 27 27 21 qn
q9 30 29 28 qp
q10 30 8 7 qn
* Models
.model qpd pnp (is e 88.013eb12 ikf e 5A tf e 32nS vaf e 50V cje e 45pF cjc e 60pF
a xtb e 2.1 bf e 12000 ne e 4 ise e 1e b 10)
.model qnd npn (is e 88.013eb12 ikf e 5A tf e 32nS vaf e 50V cje e 45pF cjc e 60pF
a xtb e 2.1 bf e 12000 ne e 4 isc e 1e b 10)
.model dclamp d (is e 10eb28 tt e 100nS)
13
TD is 5.2in
TAB WIDE
Power Operational Amplifier
ELH0101/883/8508901/2YX
TAB WIDE
Power Operational Amplifier
ELH0101 Macromodel Ð Contd.
.model qp pnp (is e 10eb15 xti e 3 eg e 1.11V vaf e 91V bf e 200 ne e 2.321 ise e 6.2fA
a ikf e 500mA xtb e 2.1 br e 3.3 nc e 2 cjc e 14.6pF vjc e 0.75V mjc e 0.3333 fc e 0.5 cje e 20pF
a vje e 0.75V mje e 0.3333 tr e 29nS tf e 0.4nS itf e 0.4 vtf e 10 xtf e 2 rb e 10)
.model qn npn (is e 3eb15 xti e 3 eg e 1.11V vaf e 151V bf e 220 ne e 1.541 ise e 14fA
a ikf e 500mA xtb e 2.1 br e 6 nc e 2 cjc e 14.6pF vjc e 0.75V mjc e 0.3333 fc e 0.5 cje e 26pF
a vje e 0.75V mje e 0.3333 tr e 51nS tf e 0.4nS itf e 0.6 vtf e 1.7 xtf e 2 rb e 10)
.ends buffer
* lf156 Subcircuit
a Input
* Connections:
b Input
*
l
*
Va
l
l
l
l
l
l
l
l
Vb
l
l
Output
5
2
7
21
l
TD is 5.8in
*
l
*
l
*
l
.subckt lf156
6
* Input Stage
vcm2 40 7 2
rd1 40 80 1.06K
rd2 40 90 1.06K
j1 80 102 12 jm1
j2 90 103 12 jm2
cin 5 6 4pF
rg1 5 102 2
rg2 6 103 2
* CM Clamp
dcm1 107 103 dm4
dcm2 105 107 dm4
vcmc 105 7 4V
ecmp 106 7 103 7 1
rcmp 107 106 10K
dcm3 109 102 dm4
dcm4 105 109 dm4
ecmn 108 2 102 2 1
rcmn 109 108 10K
cl 80 90 15pF
iss 2 12 0.48mA
gosit 2 12 90 80 2.4eb4
* Intermediate Stage
gcm 0 88 12 0 9.425eb9
ga 88 0 80 90 9.425eb4
r2 88 0 100K
c2 91 88 30pF
gb 91 0 88 0 28.6
ro2 91 0 74
14
ELH0101/883/8508901/2YX
Power Operational Amplifier
ELH0101 Macromodel Ð Contd.
TD is 3.9in
* Output Stage
rso 91 21 1
ecl 18 0 91 21 20.69
gcl 0 88 20 0 1
rcl 20 0 1K
d1 18 20 dm1
d2 20 18 dm1
d3a 131 70 dm3
d3b 13 131 dm3
gpl 0 88 70 2 1
vc 13 21 3.1552V
rpla 2 70 10K
rplb 2 131 100K
d4a 60 141 dm3
d4b 141 14 dm3
gnl 0 88 60 7 1
ve 21 14 3.1552V
rnla 60 7 10K
rnlb 141 7 100K
ip 2 7 4.52mA
dsub 7 2 dm2
* Models
.model jm1 pjf (is e 3.15eb11 beta e 9.2528eb4 vto eb1.0)
.model jm2 pjf (is e 2.85eb11 beta e 9.2528eb4 vto eb0.999)
.model dm1 d (is e 1.0eb15)
.model dm2 d (is e 8.0eb16 bv e 52.8)
.model dm3 d (is e 1.0eb16)
.model dm4 d (is e 1.0eb9)
ends lf156
* lf156 model courtesy of Linear Technology Corp.
15
ELH0101/883/8508901/2YX
ELH0101/883/8508901/2YX
Power Operational Amplifier
ELH0101 Macromodel Ð Contd.
0101 – 20
General Disclaimer
Specifications contained in this data sheet are in effect as of the publication date shown. Elantec, Inc. reserves the right to make changes
in the circuitry or specifications contained herein at any time without notice. Elantec, Inc. assumes no responsibility for the use of any
circuits described herein and makes no representations that they are free from patent infringement.
December 1994 Rev H
WARNING Ð Life Support Policy
Elantec, Inc. products are not authorized for and should not be
used within Life Support Systems without the specific written
consent of Elantec, Inc. Life Support systems are equipment intended to support or sustain life and whose failure to perform
when properly used in accordance with instructions provided can
be reasonably expected to result in significant personal injury or
death. Users contemplating application of Elantec, Inc. products
in Life Support Systems are requested to contact Elantec, Inc.
factory headquarters to establish suitable terms & conditions for
these applications. Elantec, Inc.’s warranty is limited to replacement of defective components and does not cover injury to persons or property or other consequential damages.
Elantec, Inc.
1996 Tarob Court
Milpitas, CA 95035
Telephone: (408) 945-1323
(800) 333-6314
Fax: (408) 945-9305
European Office: 44-71-482-4596
16
Printed in U.S.A.