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OPA502 High Current, High Power OPERATIONAL AMPLIFIER ®
OPA502
1
OPA502
High Current, High Power
OPERATIONAL AMPLIFIER
FEATURES
q
HIGH OUTPUT CURRENT: 10A
q
WIDE POWER SUPPLY VOLTAGE:
±
10V to
±
45V
q
USER-SET CURRENT LIMIT
q
SLEW RATE: 10V/
µ
s
q
FET INPUT: I
B
= 200pA max
q
CLASS A/B OUTPUT STAGE
q
QUIESCENT CURRENT: 25mA max
q
HERMETIC TO-3 PACKAGE
ISOLATED CASE
APPLICATIONS
q
MOTOR DRIVER
q
SERVO AMPLIFIER
q
PROGRAMMABLE POWER SUPPLY
q
ACTUATOR DRIVER
q
AUDIO AMPLIFIER
q
TEST EQUIPMENT
DESCRIPTION
The OPA502 is a high output current operational
amplifier designed to drive a wide range of resistive
and reactive loads. Its complementary class A/B
output stage provides superior performance in
applications requiring freedom from crossover distor-
tion. Resistor-programmable current limits provide
protection for both the amplifier and the load during
abnormal operating conditions. An adjustable foldover
current limit can also be used to protect against
potentially damaging conditions.
The OPA502 employs a custom monolithic op amp/
driver circuit and rugged complementary output
transistors, providing excellent DC and dynamic
performance.
The industry-standard 8-pin TO-3 package is electri-
cally isolated from all circuitry. This allows the
OPA502 to be mounted directly to a heat sink without
cumbersome insulating hardware which degrade
thermal performance. The OPA502 is available in
40
°
C to +85
°
C temperature range.
5
4
Bias
Circuit
3
V+
6
V
Output
Drive
8
R
FO
7
Current
Sense
1
+Output
Drive
2
280 20k 20k 280 ®
International Airport Industrial Park Mailing Address: PO Box 11400, Tucson, AZ 85734 Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 Tel: (520) 746-1111 Twx: 910-952-1111
Internet: http://www.burr-brown.com/ FAXLine: (800) 548-6133 (US/Canada Only) Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132
© 1992 Burr-Brown Corporation
PDS-1166B
Printed in U.S.A. March, 1998 2
®
OPA502
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the users own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
SPECIFICATIONS
T
CASE
= +25
°
C, V
S
=
±
40V, unless otherwise noted.
OPA502BM
PARAMETER
CONDITION
MIN
TYP
MAX
UNITS
OFFSET VOLTAGE
Input Offset Voltage
±
0.5
±
5
mV
vs Temperature
Specified Temp. Range
±
5
µ
V/
°
C
vs Power Supply
V
S
=
±
10V to
±
45V
74
92
dB
INPUT BIAS CURRENT
(1)
Input Bias Current
V
CM
= 0V
12
200
pA
Input Offset Current
V
CM
= 0V
±
3
pA
NOISE
Input Voltage Noise
Noise Density,
f = 1kHz
25
nV/ Hz
Current Noise Density,
f = 1kHz
3
fA/ Hz
INPUT VOLTAGE RANGE
Common-Mode Input Range, Positive
Linear Operation
(V+) 5
(V+) 4
V
Negative
Linear Operation
(V) +5
(V) +4
V
Common-Mode Rejection
V
CM
=
±
35V
74
106
dB
INPUT IMPEDANCE
Differential
10
12
|| 5 || pF
Common-Mode
10
12
|| 4 || pF
OPEN-LOOP GAIN
Open-Loop Voltage Gain
V
O
=
±
34V, R
L
= 6 92
103
dB
FREQUENCY RESPONSE
Gain-Bandwidth Product
G = +10, R
L
= 50 2.0
MHz
Slew Rate
68Vp-p, R
L
= 6 5
10
V/
µ
s
Full-Power Bandwidth
See Typical Curves
Total Harmonic Distortion
G = +3, f = 20kHz
0.06
%
V
O
= 20V, R
L
= 8 Capacitive Load
See Figure 6
OUTPUT
Voltage Output, Positive
I
O
= 10A
(V+) 6
(V+)3.5
V
Negative
I
O
= 10A
(V) +6
(V) +3.6
V
Positive
I
O
= 1A
(V+) 2.5
V
Negative
I
O
= 1A
(V) +3.1
V
Current Output
See SOA Curves
Short Circuit Current
Resistor Programmed
POWER SUPPLY
Specified Operating Voltage
±
40
V
Operating Voltage Range
±
10
±
45
V
Quiescent Current
I
O
= 0
±
20
±
25
mA
TEMPERATURE RANGE
Specification
40
+85
°
C
Storage
55
+125
°
C
Thermal Resistance, JC
DC
1.25
1.4
°
C/W
AC f 50Hz
0.8
0.9
°
C/W JA
No Heat Sink
30
°
C/W
NOTE: (1) High-speed test at T
J
= 25
°
C.
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage, V+ to V ..................................................................... 90V
Output Current .................................................................. See SOA Curve
Input Voltage .............................................................. (V) 1V to (V+)+1V
Case Temperature, Operating ......................................................... 150
°
C
Junction Temperature ...................................................................... 200
°
C
NOTE: (1) Stresses above these ratings may cause permanent damage.
PACKAGE
DRAWING
TEMPERATURE
PRODUCT
PACKAGE
NUMBER
(1)
RANGE
OPA502BM
8-Pin TO-3
030
40
°
C to +85
°
C
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
PACKAGE/ORDERING INFORMATION ®
OPA502
3
Top View
TO-3
Current
Sense
V
+In
In
V+
+Output
Drive
R
FO
Output
Drive
V
O
1
2
3
8
5
6
4
7
R
CL
R
CL
+ PIN CONFIGURATION
CURRENT LIMIT vs LIMIT RESISTOR
R
CL
( )
I
CL
(A)
10
1
0.10
0.10
0.01
1
10
I
CL
+I
CL
CURRENT LIMIT vs TEMPERATURE
Case Temperature (°C)
I
CL
(A)
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
50
50
125
25
0
25
75
100
I
CL
(A)
0.24
0.22
0.20
0.18
0.16
0.14
0.12
0.10
R
CL
= 5.0 R
CL
= 0.5 NOTE: These are average values.
I
CL
is typically 8% higher.
+I
CL
is typically 8% lower.
SUPPLY CURRENT vs TEMPERATURE
Case Temperature (°C)
Supply Current (mA)
30
20
10
50
50
125
25
0
25
75
100
V
S
= ±10 to ±45V
OPEN-LOOP GAIN AND PHASE vs FREQUENCY
Frequency (Hz)
Voltage Gain (dB)
120
100
80
60
40
20
0
10
100k
10M
100
1k
10k
1M
R
L
= 4 R
L
= 50 Phase (degrees)
0
45
90
135
180
TYPICAL PERFORMANCE CURVES
T
CASE
= +25
°
C, V
S
=
±
40V, unless otherwise noted.
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications. 4
®
OPA502
TYPICAL PERFORMANCE CURVES
(CONT)
T
CASE
= +25
°
C, V
S
=
±
40V, unless otherwise noted.
INPUT BIAS AND OFFSET CURRENTS
vs TEMPERATURE
Case Temperature (°C)
Input Bias and Offset Current (pA)
10nA
1nA
100
10
1
50
50
125
25
0
25
75
100
I
OS
I
B
INPUT BIAS CURRENT vs
INPUT COMMON-MODE VOLTAGE
Common-Mode Voltage (V)
Normalized (I
B
)
2.2
1.8
1.4
1.0
0.6
0.2
40
10
40
30
20
10
20
30
0
VOLTAGE NOISE DENSITY vs FREQUENCY
Frequency (Hz)
Voltage Noise (nV/ Hz)
10k
1k
100
10
10
1
10k
100k
100
1k
GAIN BANDWIDTH PRODUCT vs TEMPERATURE
Case Temperature (°C)
GBWP (MHz)
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0
50
50
125
25
0
25
75
100
R
L
= 50 R
L
= 10k G = +10
R
L
= 4 POWER SUPPLY REJECTION vs FREQUENCY
Frequency (Hz)
120
100
80
60
40
20
10
1
100k
1M
100
1k
PSRR (dB)
10k
COMMON-MODE REJECTION vs FREQUENCY
Frequency (Hz)
120
100
80
60
40
20
10
1
100k
1M
100
1k
CMRR (dB)
10k ®
OPA502
5
TYPICAL PERFORMANCE CURVES
(CONT)
T
CASE
= +25
°
C, V
S
=
±
40V, unless otherwise noted.
SLEW RATE vs TEMPERATURE
Case Temperature (°C)
Slew Rate (V/µs)
14
12
10
8
6
4
50
50
125
25
0
25
75
100
SR
+SR
G = +10
V
O
= 34V
PK
R
L
= 6 FULL POWER RESPONSE
Frequency (Hz)
Output Voltage (V
PK
)
35
30
25
20
15
10
5
0
10k
100k
1M
G = +10
R
L
= 8 THD < 2%
TOTAL HARMONIC DISTORTION AND NOISE
vs FREQUENCY
Frequency (Hz)
THD + N (%)
1.000
0.100
0.010
0.001
20
100
20k
1k
10k
P
O
= 100mW
G = +3
R
L
= 8 Measurement
BW = 80kHz
P
O
= 50W
P
O
= 5W
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT
I
OUT
(A)
|±V
S
| |V
OUT
| (V)
5
4
3
2
1
0
0
6
10
2
3
4
7
9
1
5
8
(+V
S
) V
O
|V
S
| |V
O
|
OUTPUT VOLTAGE SWING vs TEMPERATURE
Case Temperature (°C)
|±V
S
| |V
O
| (V)
5
4
3
2
1
0
50
50
125
25
0
25
75
100
I
O
= +10A
I
O
= 10A
I
O
= +1A
I
O
= 1A 6
®
OPA502
TYPICAL PERFORMANCE CURVES
(CONT)
T
CASE
= +25
°
C, V
S
=
±
40V, unless otherwise noted.
FIGURE 1. Basic Circuit Connections.
I
CL
Power
R
CL
at 25
°
C
Dissipation
1
( )
(A)
of R
CL
(W)
10
0.11
0.12
5
0.19
0.18
2
0.44
0.39
1
0.78
0.61
0.68
1.22
1.0
0.5
1.65
1.4
0.3
2.73
2.2
0.2
4.0
3.2
0.15
5.4
4.4
0.1
8.1
6.6
NOTE 1: Power dissipation during continuous
current limit at T
CASE
= +25
°
C.
APPLICATIONS INFORMATION
Power supply terminals should be bypassed with low series
impedance capacitors such as ceramic or tantalum close to the
device pins. Power supply wiring should have low series
impedance and inductance. Figure 1 indicates the high current
connections in bold lines.
Current limit is set with two external