OPA2544 [BB]
High-Voltage, High-Current DUAL OPERATIONAL AMPLIFIER; 高电压，大电流双路运算放大器
| 型号： | OPA2544 |
| 厂家： | 
BURR-BROWN CORPORATION |
| 描述： | High-Voltage, High-Current DUAL OPERATIONAL AMPLIFIER |
| 文件： | 总8页 (文件大小：104K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
OPA2544
F
High-Voltage, High-Current
DUAL OPERATIONAL AMPLIFIER
FEATURES
DESCRIPTION
● HIGH OUTPUT CURRENT: 2A min
The OPA2544 is a dual high-voltage/high-current op-
erational amplifier suitable for driving a wide variety
of high power loads. It provides 2A output current and
power supply voltage range extends to ±35V.
● WIDE POWER SUPPLY RANGE:
±10V to ±35V
● SLEW RATE: 8V/µs
The OPA2544 integrates two high performance FET
op amps with high power output stages on a single
monolithic chip. Internal current limit and thermal
shutdown protect the amplifier and load from damage.
● INTERNAL CURRENT LIMIT
● THERMAL SHUTDOWN PROTECTION
● FET INPUT: IB = 50pA max
● 11-LEAD PLASTIC PACKAGE
The OPA2544 is available in a 11-lead plastic
packages and is specified for the –40°C to +85°C
temperature range.
APPLICATIONS
● MOTOR DRIVER
● PROGRAMMABLE POWER SUPPLY
● SERVO AMPLIFIER
● VALVES, ACTUATOR DRIVER
● MAGNETIC DEFLECTION COIL DRIVER
● AUDIO AMPLIFIER
Case
connected
to V– Supply.
A
B
1
11
NC
V+
V–
International Airport Industrial Park
•
Mailing Address: PO Box 11400, Tucson, AZ 85734
FAXLine: (800) 548-6133 (US/Canada Only)
• 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
© 1994 Burr-Brown Corporation
PDS-1249C
Printed in U.S.A. March, 1998
SPECIFICATIONS
At TCASE = +25°C and VS = ±35V, unless otherwise noted.
OPA2544T
TYP
PARAMETER
CONDITIONS
MIN
MAX
UNITS
OFFSET VOLTAGE
Input Offset Voltage
vs Temperature
±1
±10
±10
±5
mV
µV/°C
µV/V
Specified Temp. Range
vs Power Supply
VS = ±10V to ±35V
±100
INPUT BIAS CURRENT(1)
Input Bias Current
vs Temperature
VCM = 0V
±15
Doubles every 10˚C
±10
±50
±50
pA
pA
Input Offset Current
VCM = 0V
NOISE
Input Voltage Noise
Noise Density, f = 1kHz
Current Noise Density, f = 1kHz
36
3
nV/√Hz
fA/√Hz
INPUT VOLTAGE RANGE
Common-Mode Input Range
Positive
Negative
Common-Mode Rejection
Linear Operation
Linear Operation
(V+) –6
(V–) +6
90
(V+) –4
(V–) +4
106
V
V
dB
VCM = ±VS – 6V
INPUT IMPEDANCE
Differential
Common-Mode
1012 || 8
1012 || 10
Ω || pF
Ω || pF
OPEN-LOOP GAIN
Open-Loop Voltage Gain
VO = ±30V, RL = 15Ω
90
5
103
dB
FREQUENCY RESPONSE
Gain-Bandwidth Product
Slew Rate
RL = 15Ω
60Vp-p, RL = 15Ω
1.4
8
MHz
V/µs
Full-Power Bandwidth
Settling Time 0.1%
See Typical Curve
25
G = –10, 60V Step
µs
Total Harmonic Distortion
See Typical Curve
OUTPUT
Voltage Output: Positive
Negative
Positive
Negative
Current Output
Short-Circuit Current
I
O = 2A
(V+) –5
(V–) +5
(V+) –4.2
(V–) +4
(V+) –4.4
(V–) +3.8
(V+) –3.8
(V–) +3.1
See SOA Curves
±4
V
V
V
V
IO = 2A
I
I
O = 0.5A
O = 0.5A
A
POWER SUPPLY
Specified Operating Voltage
Operating Voltage Range
Quiescent Current (total)
±35
±22
V
V
mA
±10
±35
±30
I
O = 0
TEMPERATURE RANGE
Operating Range
Storage
–40
–40
+85
+125
°C
°C
2
Thermal Resistance, θJC
Both Amplifiers, f > 50Hz
Both Amplifiers, DC
One Amplifier, f > 50Hz
One Amplifier, DC
No Heat Sink
2
2.5
2.7
3
°C/W
°C/W
°C/W
°C/W
°C/W
2
Thermal Resistance, θJC
2
Thermal Resistance, θJC
2
Thermal Resistance, θJC
2
Thermal Resistance, θJA
30
NOTES: (1) High-speed test at TJ = +25°C. (2) Calculated from total power dissipation of both amplifiers.
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.
®
OPA2544
2
ABSOLUTE MAXIMUM RATINGS(1)
CONNECTION DIAGRAM
Front View
11-Lead Plastic
Supply Voltage, V+ to V– ................................................................... 70V
Output Current ................................................................. See SOA Curve
Input Voltage .................................................... (V–) –0.7V to (V+) +0.7V
Operating Temperature ................................................. –55°C to +125°C
Storage Temperature..................................................... –40°C to +125°C
Junction Temperature ...................................................................... 150°C
Lead Temperature (soldering, –10s) ............................................... 300°C
Case
connected
to V– Supply.
NOTE: (1) Stresses above these ratings may cause permanent damage.
A
B
PACKAGE/ORDERING INFORMATION
PACKAGE
DRAWING
NUMBER(1)
TEMPERATURE
RANGE
1
11
PRODUCT
PACKAGE
OPA2544T
11-Lead Plastic
242
–40°C to +85°C
NC
V+
V–
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
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.
®
3
OPA2544
TYPICAL PERFORMANCE CURVES
At TCASE = +25°C, VS = ±35V, unless otherwise noted.
OPEN-LOOP GAIN AND PHASE vs FREQUENCY
120
INPUT BIAS CURRENT vs TEMPERATURE
10n
1n
100
80
60
40
20
0
0
–45
–90
–135
–180
RL = 15Ω
IB
100p
10p
1p
IOS
–20
1
10
100
1k
10k
100k
1M
10M
–75
–50
–25
0
25
50
75
100
125
125
1M
Frequency (Hz)
Temperature (°C)
CURRENT LIMIT vs TEMPERATURE
QUIESCENT CURRENT vs TEMPERATURE
5
4
3
2
1
0
26
24
22
20
18
VS = ±35V
VS = ±10V
–75
–50
–25
0
25
50
75
100
–75
–50
–25
0
25
50
75
100
125
Temperature (°C)
Temperature (°C)
VOLTAGE NOISE DENSITY vs FREQUENCY
CHANNEL CROSSTALK vs FREQUENCY
100
80
0
–20
9kΩ
1kΩ
60
40
–40
15Ω
–60
9kΩ
1kΩ
–80
20
10
VX
–100
–120
10
100
1k
10k
100k
1
10
100
1k
10k
100k
Frequency (Hz)
Frequency (Hz)
®
OPA2544
4
TYPICAL PERFORMANCE CURVES (CONT)
At TCASE = +25°C and VS = ±35V, unless otherwise noted.
COMMON-MODE REJECTION vs FREQUENCY
POWER SUPPLY REJECTION vs FREQUENCY
110
100
90
120
100
80
V+ Supply
80
V– Supply
70
60
60
40
50
40
20
100
1k
10k
100k
1M
1
10
100
1k
10k
100k
1M
Frequency (Hz)
Frequency (Hz)
GAIN-BANDWIDTH PRODUCT AND SLEW RATE
vs TEMPERATURE
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY
Clipping
35
30
25
20
15
10
5
2.5
2.0
1.5
1.0
0.5
9
8
7
6
Slew Rate
Limited
SR+
SR–
0
–75
–50
–25
0
25
50
75
100
125
20k
100k
200k
Frequency (Hz)
Temperature (°C)
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT
(V+) – VO
5
4
3
2
1
0
10
1
RL = 15Ω
100mW
2W
|(V–) –VO|
0.1
30W
0.01
0.001
20
100
10k 20k
0
1
2
3
1k
Output Current (A)
Frequency (Hz)
®
5
OPA2544
TYPICAL PERFORMANCE CURVES (CONT)
At TCASE = +25°C and VS = ±35V, unless otherwise noted.
OUTPUT VOLTAGE SWING vs TEMPERATURE
6
IO = +2A
5
4
IO = –2A
3
IO = +0.5A
IO = –0.5A
2
1
0
–75
–50
–25
0
25
50
75
100
125
Temperature (°C)
SMALL SIGNAL RESPONSE
G = 3, CL = 1nF
LARGE SIGNAL RESPONSE
G = 3, RL = 15Ω
200mV/div
5V/div
2µs/div
5µs/div
®
OPA2544
6
The safe output current decreases as VCE increases. Output
short-circuit is a very demanding case for SOA. A short-
circuit to ground forces the full power supply voltage (V+
or V–) across the conducting transistor. With VS = ±35V
the safe output current is 1.5A (at 25°C). The short-circuit
current is approximately 4A which exceeds the SOA. This
situation will activate the thermal shutdown circuit in the
OPA2544. For further insight on SOA, consult AB-039.
APPLICATIONS INFORMATION
Figure 1 shows the OPA2544 connected as a basic non-
inverting amplifier. The OPA2544 can be used in virtually
any op amp configuration. Power supply terminals should be
bypassed with low series impedance capacitors. The tech-
nique shown, using a ceramic and tantalum type in parallel,
is recommended. Power supply wiring should have low
series impedance and inductance.
CURRENT LIMIT
+35V
V+
The OPA2544 has an internal current limit set for approxi-
mately 4A. This current limit decreases with increasing
junction temperature as shown in the typical curve, Current
Limit versus Temperature. This, in combination with the
thermal shutdown circuit, provides protection from many
types of overload. It may not, however, protect for short-
circuit to ground, depending on the power supply voltage,
ambient temperature, heat sink and signal conditions.
10µF
R2
G = 1+
= 3
+
R1
0.1µF
R1
5kΩ
R2
10kΩ
VO
1/2
OPA2544
POWER DISSIPATION
VIN
Power dissipation depends on power supply, signal and load
conditions. For DC signals, power dissipation is equal to the
product of output current times the voltage across the con-
ducting output transistor. Power dissipation can be mini-
mized by using the lowest possible power supply voltage
necessary to assure the required output voltage swing.
ZL
0.1µF
10µF
+
V–
For resistive loads, the maximum power dissipation occurs
at a DC output voltage of one-half the power supply voltage.
Dissipation with AC signals is lower. Application Bulletin
AB-039 explains how to calculate or measure power dissi-
pation with unusual signals and loads.
–35V
FIGURE 1. Basic Circuit Connections.
SAFE OPERATING AREA
Stress on the output transistors is determined by the output
current and the voltage across the conducting output transis-
tor, VCE. The power dissipated by the output transistor is
equal to the product of the output current and the voltage
across the conducting transistor, VCE. The Safe Operating
Area (SOA curve, Figure 2) shows the permissible range of
voltage and current.
HEATSINKING
Most applications require a heat sink to assure that the
maximum junction temperature is not exceeded. The heat
sink required depends on the power dissipated and on
ambient conditions. Consult Application Bulletin AB-038
for information on determining heat sink requirements.
The heat sink tab of the plastic package is connected to the
V– power supply terminal. Lowest thermal resistance can be
achieved by mounting the tab directly to a heat sink. If the
heat sink cannot be electrically “hot” at V– power supply
potential, insulating hardware must be used.
SAFE OPERATING AREA
10
Current-Limited
4
TC = 25°C
THERMAL PROTECTION
Output current may
be limited to less
1
The OPA2544 has thermal shutdown that protects the ampli-
fier from damage. Any tendency to activate the thermal
shutdown circuit during normal operation is indication of
excessive power dissipation or an inadequate heat sink.
than 4A—see text.
TC = 85°C
0.4
TC = 125°C
The thermal protection activates at a junction temperature
of approximately 155°C. For reliable operation, junction
temperature should be limited to 150°C, maximum. To
estimate the margin of safety in a complete design (includ-
ing heat sink), increase the ambient temperature until the
thermal protection is activated. Use worst-case load and
signal conditions. For good reliability, the thermal protec-
0.1
1
2
5
10
20
50
100
|VS – VO| (V)
FIGURE 2. Safe Operating Area.
®
7
OPA2544
tion should trigger more than 25°C above the maximum
expected ambient condition of your application. This pro-
duces a junction temperature of 125°C at the maximum
expected ambient condition.
OPA2544 are operated within their linear common-mode
range, and that the output can swing to 0V. The V+ power
supply could range from 15V to 63V. The total voltage
(V– to V+) can range from 20V to 70V. With a 63V positive
supply voltage, the device may not be protected from dam-
age during short-circuits because of the larger VCE during
this condition.
Depending on load and signal conditions, the thermal pro-
tection circuit may produce a duty-cycle modulated output
signal. This limits the dissipation in the amplifier, but the
rapidly varying output waveform may be damaging to some
loads. The thermal protection may behave differently de-
pending on whether internal dissipation is produced by
sourcing or sinking output current.
OUTPUT PROTECTION
Reactive and EMF-generating loads can return load current
to the amplifier, causing the output voltage to exceed the
power supply voltage. This damaging condition can be
avoided with clamp diodes from the output terminal to the
power supplies as shown in Figure 2. Fast-recovery rectifier
diodes with a 4A or greater continuous rating are recom-
mended.
UNBALANCED POWER SUPPLIES
Some applications do not require equal positive and negative
output voltage swing. The power supply voltages of the
OPA2544 do not need to be equal. For example, a –7V
negative power supply voltage assures that the inputs of the
R2
100kΩ
V+
20pF
R2
R1
5kΩ
R2
20kΩ
G = –
= –4
R1
10kΩ
R1
AV = –R2/R1 = –10
VIN
VIN
0.1Ω
A
D1
L
1/2
OPA2544
10kΩ
Master
1Ω
D2
Motor
Paralleled operation not
recommended for input
signals that can cause
amplifiers to slew.
20pF
0.01µF
0.1Ω
V–
B
D1, D2 : Motorola MUR420
Slave
Fast Recovery Rectifier.
FIGURE 3. Motor Drive Circuit.
FIGURE 5. Paralleled Operation, Extended SOA.
+35V
+35V
10kΩ
10kΩ
10kΩ
20kΩ
3nF
30Ω
A
B
1kΩ
VIN
Load
±10V
120Vp-p
(±60V)
G = +3
G = –1
–35V
–35V
FIGURE 4. Bridge Drive Circuit.
®
OPA2544
8
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