OPA2544 [BB]

High-Voltage, High-Current DUAL OPERATIONAL AMPLIFIER; 高电压,大电流双路运算放大器
OPA2544
型号: OPA2544
厂家: BURR-BROWN CORPORATION    BURR-BROWN CORPORATION
描述:

High-Voltage, High-Current DUAL OPERATIONAL AMPLIFIER
高电压,大电流双路运算放大器

运算放大器
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  
|| pF  
|| 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 = 15  
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 = 15  
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  
5k  
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  
100k  
V+  
20pF  
R2  
R1  
5k  
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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