®
OPA512
Very-High Current—High Power
OPERATIONAL AMPLIFIER
FEATURES
q
WIDE SUPPLY RANGE:
±
10V to
±
50V
q
HIGH OUTPUT CURRENT: 15A Peak
q
CLASS A/B OUTPUT STAGE:
Low Distortion
q
VOLTAGE-CURRENT LIMIT PROTECTION
CIRCUIT
q
SMALL TO-3 PACKAGE
APPLICATIONS
q
q
q
q
q
SERVO AMPLIFIER
MOTOR DRIVER
SYNCRO EXCITATION
AUDIO AMPLIFIER
TEST PIN DRIVER
DESCRIPTION
The OPA512 is a high voltage, very-high current
operational amplifier designed to drive a wide variety
of resistive and reactive loads. Its complementary
class A/B output stage provides superior performance
in applications requiring freedom from cross-over
distortion. User-set current limit circuitry provides
protection to the amplifier and load in fault conditions.
A resistor-programmable voltage-current limiter
circuit may be used to further protect the amplifier
from damaging conditions.
3
+V
S
The OPA512 employs a laser-trimmed monolithic
integrated circuit to bias the output transistors, provid-
ing excellent low-level signal fidelity and high output
voltage swing. The reduced internal parts count made
possible with this monolithic IC improves perfor-
mance and reliability.
This hybrid integrated circuit is housed in a hermetic
TO-3 package and all circuitry is electrically-isolated
from the case. This allows direct mounting to a chassis
or heat sink without cumbersome insulating hardware
and provides optimum heat transfer.
2
4
5
Bias
Circuit
1
7
R
CL–
8
R
VI
(Optional)
R
CL+
Out
6
–V
S
International Airport Industrial Park • Mailing Address: PO Box 11400
Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP •
©
• Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
PDS-600B
Printed in U.S.A. December, 1993
1985 Burr-Brown Corporation
SPECIFICATIONS
ELECTRICAL
At T
C
= +25°C, and V
S
=
±40V,
unless otherwise noted.
OPA512BM
PARAMETER
INPUT OFFSET VOLTAGE
Initial Offset
vs Temperature
vs Supply Voltage
vs Power
INPUT BIAS CURRENT
Initial
vs Temperature
vs Supply Voltage
INPUT OFFSET CURRENT
Initial
vs Temperature
INPUT IMPEDANCE, DC
INPUT CAPACITANCE
VOLTAGE RANGE
Common-Mode Voltage
Common-Mode Rejection
GAIN
Open-Loop Gain at 10Hz
Specified Temp. Range
Specified Temp. Range
1kΩ Load
Specified Temp. Range
8Ω Load
8Ω Load
8Ω Load
Specified Temp. Range
8Ω Load
BM at 10A, SM at 15A
Specified Temp. Range
I
O
= 80mA
I
O
= 5A
2V Step
2.5
Specified Temp. Range
G=1
Specified Temp. Range
G > 10
Specified Temp. Range
±10
±40
25
±(|V
S
| – 5)
74
CONDITIONS
MIN
TYP
±2
±10
±30
±20
12
±50
±10
±12
±50
200
3
±(|V
S
| – 3)
100
110
96
13
108
4
20
20
±(|V
S
| – 6)
±(|V
S
| – 5)
±(|V
S
| – 5)
10
2
4
1.5
SOA
(2)
±45
50
*
*
*
±(|V
S
| – 7)
*
*
15
*
*
*
*
*
±50
35
V
mA
*
*
*
*
MAX
±6
±65
±200
MIN
OPA512SM
TYP
±1
*
*
*
10
*
*
±5
*
*
*
*
*
*
*
*
*
*
MAX
±3
±40
*
UNITS
mV
µV/°C
µV/V
µV/V
nA
pA/°C
pA/V
nA
pA/°C
MΩ
pF
V
dB
dB
dB
MHz
kHz
Degrees
V
V
V
A
µs
V/µs
nF
Specified Temp. Range
Specified Temp. Range
30
400
20
*
±30
±10
Specfied Temp. Range
Gain-Bandwidth Product, 1MHz
Power Bandwidth
Phase Margin
OUTPUT
Voltage Swing
(1)
Current, Peak
Settling Time to 0.1%
Slew Rate
Capacitive Load
POWER SUPPLY
Voltage
Current, Quiescent
THERMAL RESISTANCE
AC Junction-to-Case
(3)
DC Junction-to-Case
Junction to Air
TEMPERATURE RANGE
Specified
T
C
= –55°C to +125°C,
f > 60Hz
T
C
= –55°C to +125°C
T
C
= –55°C to +125°C
T
C
–25
0.8
1.25
30
0.9
1.4
*
*
*
–55
*
*
°C/W
°C/W
°C/W
°C
+85
+125
*Specification same as OPA512BM.
NOTES: (1) +V
S
and –V
S
denote the postive and negative supply voltage, respectively. Total V
S
is measured from +V
S
to –V
S
. (2) SOA = Safe Operating Area.
(3) Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz.
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.
®
OPA512
2
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, +V
S
to –V
S
................................................................ 100V
Output Current: Source ........................................................................ 15A
Sink .................................................................... see SOA
Power Dissipation, Internal
(1)
............................................................ 125W
Input Voltage: Differential ........................................................
±(|V
S
| – 3V)
Common-mode .............................................................
±V
S
Temperature: Pins (soldering, 10s) ................................................ +300°C
Junction
(1)
............................................................... +200°C
Temperature Range: Storage
(2)
...................................... –65°C to +150°C
Operating (Case) .......................... –55°C to +125°C
NOTES: (1) Long term operation at the maximum junction temperature will
result in reduced product life. Derate internal power dissipation to achieve
high MTTF. (2) OPA512BM, –55°C to +100°C.
CONNECTION DIAGRAM
Top View
+V
S
3
+In 4
2
1
Output
+Current
Limit
+R
CL
–R
CL
–In 5
6
–V
S
7
R
VI
8
–Current
Limit
ORDERING INFORMATION
MODEL
OPA512BM
OPA512SM
PACKAGE
8-pin TO-3
8-pin TO-3
TEMPERATURE RANGE
–25°C to +85°C
–55°C to +125°C
PACKAGE INFORMATION
MODEL
OPA512BM
OPA512SM
PACKAGE
8-Pin TO-3
8-Pin TO-3
PACKAGE DRAWING
NUMBER
(1)
030
030
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.
®
3
OPA512
TYPICAL PERFORMANCE CURVES
T
A
= 25°C, V
S
=
±40VDC,
unless otherwise noted.
POWER DERATING
140
2.5
2.2
BIAS CURRENT
Internal Power Dissipation, P (W)
120
100
80
60
40
BM
20
0
0
20
40
60
80
100
120
140
Case Temperature, T
C
(°C)
SM
Normalized Bias Current, I
B
1.9
1.6
1.3
1.0
0.7
0.4
–50
–25
0
25
50
75
100
125
Case Temperature, T
C
(°C)
CURRENT LIMIT
17.5
15.0
12.5
10.0
7.5
5.0
2.5
V
O
= –24V
0
–50
–25
0
25
50
75
100
125
Case Temperature, T
C
(°C)
–20
1
10
120
100
SMALL SIGNAL RESPONSE
Open-Loop Gain, A (dB)
Current Limit, I
LIM
(A)
V
O
= 0
R
CL
= 0.06Ω, R
VI
=
∞
V
O
= 24V
V
O
= 0
R
CL
= 0.18Ω, R
VI
= 0
80
60
40
20
0
100
1k
10k
100k
1M
10M
Frequency, f (Hz)
PHASE RESPONSE
0
–30
100
68
POWER RESPONSE
|+V
S
| + |–V
S
| = 100V
|+V
S
| + |–V
S
| = 80V
46
32
22
15
10
6.8
4.6
|+V
S
| + |–V
S
| = 30V
Phase,
φ
(degrees)
–60
–90
–120
–150
–180
–210
1
10
100
1k
10k
100k
1M
10M
Frequency, f (Hz)
Output Voltage, V
O
(Vp-p)
10
20
30
Frequency, f (kHz)
50
70
100
®
OPA512
4
TYPICAL PERFORMANCE CURVES
(CONT)
T
A
= 25°C, V
S
=
±40VDC,
unless otherwise noted.
COMMON-MODE REJECTION
120
Common-Mode Rejection, CMR (dB)
100
Output Voltage, V
O
(V)
8
PULSE RESPONSE
V
IN
= ±5V, t
R
= 100ns
6
4
2
0
–2
–4
–6
–8
80
60
40
20
0
1
10
100
1k
10k
100k
1M
Frequency, f (Hz)
0
2
4
6
Time, t (µs)
8
10
12
INPUT NOISE
100
Input Noise Voltage, V
N
(nV/√Hz)
3
1
0.3
0.1
0.03
0.01
G = 10
V
S
= ±37V
R
L
= 4Ω
HARMONIC DISTORTION
70
50
Distortion (%)
40
30
20
P
O
= 4W
P
O
= 100mW
P
O
= 120W
10
0
100
1k
Frequency, f (Hz)
10k
100k
0.003
100
300
1k
3k
10k
30k
100k
Frequency, f (Hz)
QUIESCENT CURRENT
1.6
1.4
Normalized, I
Q
1.2
1.0
0.8
T
C
= +125°C
0.6
0.4
40
50
60
70
80
90
100
Total Supply Voltage, V
S
(V)
T
C
= –25°C
T
C
= +25°C
T
C
= +85°C
6
OUTPUT VOLTAGE SWING
Voltage Drop From Supply (V)
5
4
–V
O
3
+V
O
2
1
0
3
6
9
12
15
Output Current, I
O
(A)
®
5
OPA512
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