1
OPA549
OPA549
High-Voltage, High-Current
OPERATIONAL AMPLIFIER
DESCRIPTION
The OPA549 is a low-cost, high-voltage/high-current
operational amplifier ideal for driving a wide variety
of loads. This laser-trimmed monolithic integrated
circuit provides excellent low-level signal accuracy,
and high output voltage and current.
The OPA549 operates from either single or dual sup-
plies for design flexibility. The input common-mode
range extends below the negative supply.
The OPA549 is internally protected against over-
temperature conditions and current overloads. In addi-
tion, the OPA549 provides an accurate, user-selected
current limit. Unlike other designs which use a "power"
resistor in series with the output current path, the
OPA549 senses the load indirectly. This allows the
current limit to be adjusted from 0A to 10A with a
resistor/potentiometer, or controlled digitally with a
voltage-out or current-out DAC.
The Enable/Status (E/S) pin provides two functions. It
can be monitored to determine if the device is in
thermal shutdown, and it can be forced low to disable
the output stage and effectively disconnect the load.
The OPA549 is available in an 11-lead power ZIP
package. Its copper tab allows easy mounting to a heat
sink for excellent thermal performance. Operation is
specified over the extended industrial temperature
range, 40
C to +85
C.
FEATURES
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HIGH OUTPUT CURRENT:
8A Continuous
10A Peak
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WIDE POWER SUPPLY RANGE:
Single Supply: +8V to +60V
Dual Supply:
4V to
30V
q
WIDE OUTPUT VOLTAGE SWING
q
FULLY PROTECTED:
Thermal Shutdown
Adjustable Current Limit
q
OUTPUT DISABLE CONTROL
q
THERMAL SHUTDOWN INDICATOR
q
HIGH SLEW RATE: 9V/
s
q
CONTROL REFERENCE PIN
q
11-LEAD POWER ZIP PACKAGE
APPLICATIONS
q
VALVE, ACTUATOR DRIVER
q
SYNCHRO, SERVO DRIVER
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POWER SUPPLIES
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TEST EQUIPMENT
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TRANSDUCER EXCITATION
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AUDIO POWER AMPLIFIER
1999 Burr-Brown Corporation
PDS-1450A
Printed in U.S.A. November, 1999
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/ Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132
OPA549
For most current data sheet and other product
information, visit www.burr-brown.com
OPA549
V+
E/S
R
CL
R
CL
sets the current limit
value from 0A to 10A.
(Very Low Power Dissipation)
I
LIM
V
O
V
Ref
ES Pin
Forced Low: Output disabled
Indicates Low: Thermal shutdown
2
OPA549
OPA549T
PARAMETER
CONDITION
MIN
TYP
MAX
UNITS
OFFSET VOLTAGE
V
OS
Input Offset Voltage
V
CM
= 0V, I
O
= 0
1
5
mV
vs Temperature
dV
OS
/dT
T
CASE
= 40
C to +85
C
20
V/
C
vs Power Supply
PSRR
V
S
=
4V to
30V, Ref = V
25
100
V/V
INPUT BIAS CURRENT
(1)
Input Bias Current
(2)
I
B
V
CM
= 0V
100
500
nA
vs Temperature
T
CASE
= 40
C to +85
C
0.5
nA/
C
Input Offset Current
I
OS
V
CM
= 0V
5
50
nA
NOISE
Input Voltage Noise Density
e
n
f = 1kHz
70
nV/
Hz
Current Noise Density
i
n
f = 1kHz
1
pA/
Hz
INPUT VOLTAGE RANGE
Common-Mode Voltage Range: Positive
V
CM
Linear Operation
(V+) 3
(V+) 2.3
V
Negative
V
CM
Linear Operation
(V) 0.1
(V) 0.2
V
Common-Mode Rejection Ratio
CMRR
V
CM
= (V) 0.1V to (V+) 3V
80
95
dB
INPUT IMPEDANCE
Differential
10
7
|| 6
|| pF
Common-Mode
10
9
|| 4
|| pF
OPEN-LOOP GAIN
Open-Loop Voltage Gain
A
OL
V
O
=
25V, R
L
= 1k
100
110
dB
V
O
=
25V, R
L
= 4
100
dB
FREQUENCY RESPONSE
Gain Bandwidth Product
GBW
0.9
MHz
Slew Rate
SR
G = 1, 50Vp-p Step, R
L
= 4
9
V/
s
Full Power Bandwidth
See Typical Curve
Settling Time:
0.1%
G = 10, 50V Step
20
s
Total Harmonic Distortion + Noise
(3)
THD+N
f = 1kHz,R
L
= 4
,G = +3, Power = 25W
0.015
%
OUTPUT
Voltage Output, Positive
I
O
= 2A
(V+) 3.2
(V+) 2.7
V
Negative
I
O
= 2A
(V) + 1.7
(V) + 1.4
V
Positive
I
O
= 8A
(V+) 4.8
(V+) 4.3
V
Negative
I
O
= 8A
(V) + 4.6
(V) + 3.9
V
Negative
R
L
= 8
to V
(V) + 0.3
(V) + 0.1
V
Maximum Continuous Current Output: dc
(4)
8
A
ac
(4)
Waveform Cannot Exceed 10A peak
8
Arms
Output Current Limit
Current Limit Range
0 to
10
A
Current Limit Equation
I
LIM
= 15800 4.75V/(7500
+ R
CL
)
A
Current Limit Tolerance
(1)
R
CL
= 7.5k
(I
LIM
=
5A), R
L
= 4
200
500
mA
Capacitive Load Drive (Stable Operation) C
LOAD
See Typical Curve
Output Disabled
Leakage Current
Output Disabled
See Typical Curve
Output Capacitance
Output Disabled
750
pF
OUTPUT ENABLE /STATUS (E/S) PIN
Shutdown Input Mode
V
E/S
High (output enabled)
E/S Pin Open or Forced High
(Ref) + 2.4
V
V
E/S
Low (output disabled)
E/S Pin Forced Low
(Ref) + 0.8
V
I
E/S
High (output enabled)
E/S Pin Indicates High
50
A
I
E/S
Low (output disabled)
E/S Pin Indicates Low
55
A
Output Disable Time
1
s
Output Enable Time
3
s
Thermal Shutdown Status Output
Normal Operation
Sourcing 20
A
(Ref) + 2.4
(Ref) + 3.5
V
Thermally Shutdown
Sinking 5
A, T
J
> 160
C
(Ref) + 0.2
(Ref) + 0.8
V
Junction Temperature, Shutdown
+160
C
Reset from Shutdown
+140
C
Ref (Reference Pin for Control Signals)
Voltage Range
V
(V+) 8
V
Current
(2)
3.5
mA
POWER SUPPLY
Specified Voltage
V
S
30
V
Operating Voltage Range, (V+) (V)
8
60
V
Quiescent Current
I
Q
I
LIM
Connected to Ref I
O
= 0
26
35
mA
Quiescent Current in Shutdown Mode
I
LIM
Connected to Ref
6
mA
TEMPERATURE RANGE
Specified Range
40
+85
C
Operating Range
40
+125
C
Storage Range
55
+125
C
Thermal Resistance,
JC
1.4
C/W
Thermal Resistance,
JA
No Heat Sink
30
C/W
NOTES: (1) High-speed test at T
J
= +25
C. (2) Positive conventional current is defined as flowing into the terminal. (3) See "Total Harmonic Distortion + Noise vs
Frequency" in the Typical Performance Curves section for additional power levels. (4) See "Safe Operating Area" (SOA) in the Typical Performance Curves section.
SPECIFICATIONS: V
S
=
2.25V to
18V
Boldface limits apply over the specified temperature range, T
A
= 40
C to +85
C
At T
CASE
= +25
C, V
S
=
30V, Ref
= 0V, and E/S pin open, unless otherwise noted.
3
OPA549
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 degrada-
tion 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.
ABSOLUTE MAXIMUM RATINGS
(1)
Output Current ................................................ See SOA Curve (Figure 6)
Supply Voltage, V+ to V ................................................................... 60V
Input Voltage Range ....................................... (V) 0.5V to (V+) + 0.5V
Input Shutdown Voltage ................................................... Ref 0.5 to V+
Operating Temperature .................................................. 40
C to +125
C
Storage Temperature ..................................................... 55
C to +125
C
Junction Temperature ...................................................................... 150
C
Lead Temperature (soldering, 10s) ................................................. 300
C
ESD Capability (Human Body Model) ............................................. 2000V
NOTE: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may de-
grade device reliability.
CONNECTION DIAGRAM
PACKAGE/ORDERING INFORMATION
PACKAGE
DRAWING
TEMPERATURE
PRODUCT
PACKAGE
NUMBER
RANGE
OPA549T
11-Lead Power ZIP
242
40
C to +85
C
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 user's 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.
In
+In
Ref
I
LIM
E/S
V+
V
O
1
3
5
7
9
11
2
4
6
8
10
V
Tab connected to V. Do not use to conduct current.
Connect both pins 1 and 2 to output.
Connect both pins 5 and 7 to V.
Connect both pins 10 and 11 to V+.
4
OPA549
TYPICAL PERFORMANCE CURVES
At T
CASE
= +25
C, V
S
=
30V and E/S pin open, unless otherwise noted.
60
40
20
0
20
40
60
80
140
120
100
130
120
110
100
90
80
70
60
50
40
Input Bias Current (nA)
Temperature (
C)
INPUT BIAS CURRENT vs TEMPERATURE
I
B
+I
B
30
20
10
0
10
20
30
200
180
160
140
120
100
80
60
40
20
0
Input Bias Current (nA)
Common-Mode Voltage (V)
INPUT BIAS CURRENT
vs COMMON-MODE VOLTAGE
1
10
100
1k
10k
100k
1M
10M
120
100
80
60
40
20
0
20
40
0
20
40
60
80
100
120
140
160
Gain (dB)
Phase (
)
Frequency (Hz)
OPEN-LOOP GAIN AND PHASE
vs FREQUENCY
0
5
10
15
20
25
30
9
8
7
6
5
4
3
2
1
0
Current Limit (A)
Supply Voltage (V)
CURRENT LIMIT vs SUPPLY VOLTAGE
+I
LIM
, 5A
I
LIM
, 5A
+I
LIM
, 2A
I
LIM
, 2A
+I
LIM
, 8A
I
LIM
, 8A
75
50
25
0
25
50
75
100
125
30
25
20
15
10
5
0
Quiescent Current (mA)
Temperature (
C)
QUIESCENT CURRENT vs TEMPERATURE
V
S
=
30V
V
S
=
5V
I
Q
Shutdown (output disabled)
75
50
25
0
25
50
75
100
125
9
8
7
6
5
4
3
2
1
0
Current Limit (A)
Temperature (
C)
CURRENT LIMIT vs TEMPERATURE
5A
2A
8A
5
OPA549
TYPICAL PERFORMANCE CURVES
(Cont.)
At T
CASE
= +25
C, V
S
=
30V and E/S pin open, unless otherwise noted.
1
10
100
1k
10k
100k
300
250
200
150
100
50
0
Voltage Noise (nV/
Hz)
Frequency (Hz)
VOLTAGE NOISE DENSITY vs FREQUENCY
10
100
1k
10k
100k
1M
120
100
80
60
40
20
0
Power Supply Rejection Ratio (dB)
Frequency (Hz)
POWER SUPPLY REJECTION RATIO
vs FREQUENCY
PSRR
+PSRR
75
50
0
50
100
A
OL
125
120
110
100
90
80
A
OL
, CMRR, PSRR (dB)
Temperature (
C)
OPEN-LOOP GAIN, COMMON-MODE REJECTION RATIO
AND POWER SUPPLY REJECTION RATIO
vs TEMPERATURE
CMRR
PSRR
20
100
1k
10k
20k
1
0.1
0.01
0.001
THD+N (%)
Frequency (Hz)
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
G = +3
R
L
= 4
0.1W
1W
10W
75W
75
50
25
0
25
50
75
100
125
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
16
15
14
13
12
11
10
9
8
7
6
Gain-Bandwidth Product (MHz)
Slew Rate (V/
s)
Temperature (
C)
GAIN-BANDWIDTH PRODUCT AND
SLEW RATE vs TEMPERATURE
SR+
SR
GBW
10
100
1k
10k
100k
100
90
80
70
60
50
40
Common-Mode Rejection (dB)
Frequency (Hz)
COMMON-MODE REJECTION RATIO vs FREQUENCY
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