OPA547
OPA
547
O PA
547
O PA
547
SBOS056F – JANUARY 2002 – JULY 2005
High-Voltage, High-Current
OPERATIONAL AMPLIFIER
FEATURES
DESCRIPTION
● WIDE SUPPLY RANGE
Single Supply: +8V to +60V
Dual Supply: ±4V to ±30V
● HIGH OUTPUT CURRENT:
500mA Continuous
● WIDE OUTPUT VOLTAGE SWING
● FULLY PROTECTED:
Thermal Shutdown
Adjustable Current Limit
● OUTPUT DISABLE CONTROL
● THERMAL SHUTDOWN INDICATOR
● HIGH SLEW RATE: 6V/µs
● LOW QUIESCENT CURRENT
● PACKAGES:
7-Lead TO-220, Zip and Straight Leads
7-Lead DDPAK Surface-Mount
The OPA547 is a low-cost, high-voltage/high-current operational amplifier ideal for driving a wide variety of loads. A
laser-trimmed monolithic integrated circuit provides excellent
low-level signal accuracy and high output voltage and current.
The OPA547 operates from either single or dual supplies for
design flexibility. In single-supply operation, the input common-mode range extends below ground.
The OPA547 is internally protected against over-temperature
conditions and current overloads. In addition, the OPA547
was designed to provide an accurate, user-selected current
limit. Unlike other designs which use a “power” resistor in
series with the output current path, the OPA547 senses the
load indirectly. This allows the current limit to be adjusted
from 0mA to 750mA with a 0 to 150µA control signal. This is
easily done with a resistor/potentiometer or controlled digitally with a voltage-out or current-out DAC.
The Enable/Status (E/S) pin provides two functions. An input
on the pin not only disables the output stage to effectively
disconnect the load, but also reduces the quiescent current
to conserve power. The E/S pin output can be monitored to
determine if the OPA547 is in thermal shutdown.
APPLICATIONS
●
●
●
●
●
●
VALVE, ACTUATOR DRIVERS
SYNCHRO, SERVO DRIVERS
POWER SUPPLIES
TEST EQUIPMENT
TRANSDUCER EXCITATION
AUDIO AMPLIFIERS
The OPA547 is available in an industry-standard
7-lead staggered and straight lead TO-220 package, and a
7-lead DDPAK surface-mount plastic power package. The
copper tab allows easy mounting to a heat sink or circuit
board for excellent thermal performance. It is specified for
operation over the extended industrial temperature range,
–40°C to +85°C.
V+
–
VIN
OPA547
VO
ILIM
+
VIN
RCL (1/4 Watt Resistor)
RCL sets the current limit
value from 0 to 750mA.
E/S
V–
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright © 2002-2005, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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ABSOLUTE MAXIMUM RATINGS(1)
ELECTROSTATIC
DISCHARGE SENSITIVITY
Output Current ................................................................. See SOA Curve
Supply Voltage, V+ to V– ................................................................... 60V
Input Voltage .................................................. (V–) – 0.5V to (V+) + 0.5V
Input Shutdown Voltage ........................................................................ V+
Operating Temperature .................................................. –40°C to +125°C
Storage Temperature ..................................................... –55°C to +125°C
Junction Temperature ...................................................................... 150°C
Lead Temperature (soldering 10s)(2) .............................................. 300°C
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
NOTES: (1) Stresses above these ratings may cause permanent damage. (2)
Vapor-phase or IR reflow techniques are recommended for soldering the
OPA547F surface-mount package. Wave soldering is not recommended due to
excessive thermal shock and “shadowing” of nearby devices.
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.
PACKAGE/ORDERING INFORMATION
For the most current package and ordering information, see the Package Ordering Addendum at the end of this document, or see
the TI website at www.ti.com.
PIN CONFIGURATIONS
Top Front View
7-Lead
Stagger-Formed
TO-220 (T)
7-Lead
Straight-Formed
TO-220 (T-1)
1 2 3 4 5 6 7
7-Lead
DDPAK (FA)
Surface-Mount
1 2 3 4 5 6 7
1 2 3 4 5 6 7
VIN+ ILIM V+ E/S
VIN– V– VO
VIN+ ILIM V+ E/S
VIN– V– VO
VIN+ ILIM V+ E/S
VIN– V– VO
NOTE: Tabs are electrically connected to the V– supply.
2
OPA547
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SBOS056F
ELECTRICAL CHARACTERISTICS
At TCASE = +25°C, VS = ±30V and E/S pin open, unless otherwise noted.
OPA547T, F
PARAMETER
OFFSET VOLTAGE
Input Offset Voltage
vs Temperature
vs Power Supply
INPUT BIAS CURRENT(1)
Input Bias Current(2)
vs Temperature
Input Offset Current
CONDITION
MIN
TYP
MAX
UNITS
VCM = 0, IO = 0
TA = –40°C to +85°C
VS = ±4V to ±30V
±1
±25
10
±5
mV
µV/°C
µV/V
VCM = 0V
–100
±0.5
±5
VCM = 0V
NOISE
Input Voltage Noise Density, f = 1kHz
Current Noise Density, f = 1kHz
INPUT VOLTAGE RANGE
Common-Mode Voltage Range: Positive
Negative
Common-Mode Rejection
Linear Operation
Linear Operation
VCM = (V–) –0.1V to (V+) –3V
(V+) –3
(V–) –0.1
80
INPUT IMPEDANCE
Differential
Common-Mode
OPEN-LOOP GAIN
Open-Loop Voltage Gain, f = 10Hz
FREQUENCY RESPONSE
Gain-Bandwidth Product
Slew Rate
Full-Power Bandwidth
Settling Time: ±0.1%
Total Harmonic Distortion + Noise, f = 1kHz
OUTPUT
Voltage Output, Positive
Negative
Positive
Negative
Maximum Continuous Current Output: dc
ac
Leakage Current, Output Disabled, dc
Output Current Limit
Current Limit Range
Current Limit Equation
Current Limit Tolerance(1)
VO = ±25V, RL = 1kΩ
VO = ±25V, RL = 50Ω
100
RL = 50Ω
G = 1, 50VPP, RL = 50Ω
G = –10, 50V Step
RL = 50Ω, G = +3V, 1W Power
IO = 0.5A
IO = –0.5A
IO = 0.1A
IO = –0.1A
(V+) –2.2
(V–) +1.6
(V+) –1.8
(V–) +1.2
±500
500
POWER SUPPLY
Specified Voltage
Operating Voltage Range
Quiescent Current
Quiescent Current, Shutdown Mode
TEMPERATURE RANGE
Specified Range
Operating Range
Storage Range
Thermal Resistance, θJC
7-Lead DDPAK, 7-Lead TO-220
7-Lead DDPAK, 7-Lead TO-220
Thermal Resistance, θJA
7-Lead DDPAK, 7-Lead TO-220
–500
±50
nA
nA/°C
nA
90
200
nV/√Hz
fA/√Hz
(V+) –2.3
(V–) –0.2
95
V
V
dB
107 || 6
109 || 4
Ω || pF
Ω || pF
115
110
dB
dB
1
6
See Typical Curve
18
0.004(3)
MHz
V/µs
kHz
µs
%
(V+) –1.9
(V–) +1.3
(V+) –1.5
(V–) +0.8
V
V
V
V
mA
mArms
See Typical Curve
0 to ±750
ILIM = (5000)(4.75)/(31600Ω + RCL)
±10
±30
RCL = 31.6kΩ (ILIM = ±375mA),
RL = 50Ω
mA
A
mA
See Typical Curve(4)
Capacitive Load Drive
OUTPUT ENABLE /STATUS (E/S) PIN
Shutdown Input Mode
VE/S HIGH (output enabled)
VE/S LOW (output disabled)
IE/S HIGH (output enabled)
IE/S LOW (output disabled)
Output Disable Time
Output Enable Time
Thermal Shutdown Status Output
Normal Operation
Thermally Shutdown
Junction Temperature, Shutdown
Reset from Shutdown
100
E/S Pin Open or Forced HIGH
E/S Pin Forced LOW
E/S Pin HIGH
E/S Pin LOW
(V–) +2.4
Sourcing 20µA
Sinking 5µA, TJ > 160°C
(V–) +2.4
(V–) +0.8
–60
–65
1
3
±4
ILIM Connected to V–, IO = 0
ILIM Connected to V–
(V–) +3.5
(V–) +0.35
+160
+140
±30
±10
±4
–40
–40
–55
(V–) +0.8
V
V
µA
µA
µs
µs
V
V
°C
°C
±30
±15
V
V
mA
mA
+85
+125
+125
°C
°C
°C
f > 50Hz
dc
2
3
°C/W
°C/W
No Heat Sink
65
°C/W
NOTES: (1) High-speed test at TJ = +25°C. (2) Positive conventional current flows into the input terminals. (3) See Total Harmonic Distortion+Noise in the Typical
Characteristics section for additional power levels. (4) See Small-Signal Overshoot vs Load Capacitance in the Typical Characteristics section.
OPA547
SBOS056F
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3
TYPICAL CHARACTERISTICS
At TCASE = +25°C, VS = ±30V, and E/S pin open, unless otherwise noted.
OPEN-LOOP GAIN AND PHASE
vs FREQUENCY
INPUT BIAS CURRENT vs TEMPERATURE
120
–160
RL = 50Ω
φ
60
–45
40
–90
20
–135
0
–180
Phase (°)
Gain (dB)
0
Input Bias Current (nA)
G
80
–120
10
100
1k
10k
100k
1M
VS = ±30V
–100
IB
–80
–60
–40
–20
–20
1
VS = ±5V
–140
100
0
–75
10M
–50
–25
0
25
Frequency (Hz)
CURRENT LIMIT vs TEMPERATURE
±600
RCL = 31.6kΩ
±300
RCL = 63.4kΩ
±200
150
–ILIM
RCL = 15.9kΩ
±500
±450
+400
RCL = 31.6kΩ
±350
±300
RCL = 63.4kΩ
±200
–50
–25
0
25
50
75
100
125
150
0
±5
±10
Temperature (°C)
±15
±20
±25
±30
Supply Voltage (V)
VOLTAGE NOISE DENSITY vs FREQUENCY
±12
Quiescent Current (mA)
400
Voltage Noise (nV/√Hz)
125
+ILIM
±250
±100
–75
100
±550
Current Limit (mA)
Current Limit (mA)
±400
75
CURRENT LIMIT vs SUPPLY VOLTAGE
±600
RCL = 15.9kΩ
±500
50
Temperature (°C)
300
200
100
QUIESCENT CURRENT vs TEMPERATURE
VS = ±30V
IQ
±10
±8
VS = ±5V
±6
VS = ±30V
IQ Shutdown
±4
VS = ±5V
±2
–75
0
1
10
100
1k
10k
100k
1M
4
–50
–25
0
25
50
75
100
125
150
Temperature (°C)
Frequency (Hz)
OPA547
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SBOS056F
TYPICAL CHARACTERISTICS (Cont.)
At TCASE = +25°C, VS = ±30V, and E/S pin open, unless otherwise noted.
POWER SUPPLY REJECTION
vs FREQUENCY
COMMON-MODE REJECTION vs FREQUENCY
100
120
90
100
+PSRR
80
70
PSR (dB)
60
50
60
40
–PSRR
40
20
30
20
0
10
100
1k
10k
100k
1M
1
10
100
Frequency (Hz)
100k
105
1M
120
AOL
40
100
G = +1
3
CMRR (dB)
Overshoot (%)
10k
OPEN-LOOP GAIN, COMMON-MODE REJECTION,
AND POWER SUPPLY REJECTION vs TEMPERATURE
SMALL-SIGNAL OVERSHOOT
vs LOAD CAPACITANCE
50
1k
Frequency (Hz)
G = –1
20
115
CMRR
95
100
PSRR
90
95
10
85
–75
0
2k
4k
6k
8k
10k
12k
14k
16k
18k
50
75
100
90
150
10k
20k
0.1
7
0.5
6
SR–
1W
0.01
THD+N (%)
6.5
–25
125
RL = 50Ω
G = +3
GBW
SR+
0.1W
6.25W
0.001
5.5
0
25
50
75
100
125
5
150
0.0001
Temperature (°C)
20
100
1k
Frequency (Hz)
OPA547
SBOS056F
25
TOTAL HARMONIC DISTORTION+NOISE
vs FREQUENCY
7.5
–50
0
GAIN-BANDWIDTH PRODUCT AND
SLEW RATE vs TEMPERATURE
0.75
0
–75
–25
Temperature (°C)
1
0.25
–50
Load Capacitance (pF)
1.25
Gain-Bandwidth Product (MHz)
20k
Slew Rate (V/µs)
0
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5
PSRR, AOL (dB)
CMR (dB)
80
TYPICAL CHARACTERISTICS (Cont.)
At TCASE = +25°C, VS = ±30V, and E/S pin open, unless otherwise noted.
OUTPUT VOLTAGE SWING vs TEMPERATURE
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT
2.5
3
IO = +500mA
IO = +100mA
2
VSUPPLY – VOUT (V)
VSUPPLY– VOUT (V)
2.5
(V+) –VO
1.5
1
(V–) –VO
0.5
1.5
IO = –500mA
1
0.5
IO = –100mA
0
0
100
200
300
400
500
0
–75
600
–50
–25
0
25
50
75
Temperature (°C)
MAXIMUM OUTPUT VOLTAGE SWING
vs FREQUENCY
OUTPUT LEAKAGE CURRENT
vs APPLIED OUTPUT VOLTAGE
Leakage Current (mA)
15
10
0.5
RCL = 31.6kΩ
RCL = ∞
0
RCL = 0
–0.5
Output Disabled
VE/S < (V–) + 0.8V
5
–1
–40
0
1k
10k
100k
1M
–30
–20
–10
0
10
Frequency (Hz)
Output Voltage (V)
OFFSET VOLTAGE
PRODUCTION DISTRIBUTION
OFFSET VOLTAGE DRIFT
PRODUCTION DISTRIBUTION
20
25
Typical production
distribution of
packaged units.
Percent of Amplifiers (%)
Percent of Amplifiers (%)
150
RL = 10Ω
VS = ±30V
20
16
125
1
Maximum Output
Voltage Without
Slew Rate Induced
Distortion
25
18
100
Output Current (mA)
30
Output Voltage (Vp)
2
14
12
10
8
6
4
20
30
Typical production
distribution of
packaged units.
20
15
10
5
2
0
0
–5
–4
–3
–2
–1
0
1
2
3
4
0
5
10 15 20 25 30 35 40 45 50 55 60 65 70
Offset Voltage Drift (µV/°C)
Offset Voltage (mV)
6
5
OPA547
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SBOS056F
TYPICAL CHARACTERISTICS (Cont.)
At TCASE = +25°C, VS = ±35V, and E/S pin open, unless otherwise noted.
SMALL SIGNAL STEP RESPONSE
G = 3, CL = 1000pF
50mV/div
50mV/div
SMALL SIGNAL STEP RESPONSE
G = 1, CL = 1000pF
2µs/div
2µs/div
10V/div
LARGE SIGNAL STEP RESPONSE
G = 3, CL = 100pF, RL = 50Ω
5µs/div
OPA547
SBOS056F
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7
APPLICATIONS INFORMATION
Figure 1 shows the OPA547 connected as a basic noninverting
amplifier. The OPA547 can be used in virtually any op amp
configuration.
Power-supply terminals should be bypassed with low series
impedance capacitors. The technique shown, using a ceramic and tantalum type in parallel, is recommended. Powersupply wiring should have low series impedance.
V+
10µF
+
G = 1+
0.1µF(2)
R1
2
VIN
R2
R1
OPA547
6
3
1
ILIM(1)
4
(5000)(4.75)
– 31.6kΩ
ILIM
(1)
The low-level control signal (0µA to 150µA) also allows the
current limit to be digitally controlled with a current-out or
voltage-out DAC reference to V– according to the equations
given in Figure 3.
SAFE OPERATING AREA
E/S
7
R CL =
Figure 3 shows a simplified schematic of the internal circuitry
used to set the current limit. Leaving the ILIM pin open
programs the output current to zero, while connecting ILIM
directly to V– programs the maximum output current limit,
typically 750mA.
R2
5
With the OPA547, the simplest method for adjusting the
current limit uses a resistor or potentiometer connected
between the ILIM pin and V– according to the Equation 1:
Stress on the output transistors is determined both by the
output current and by the output voltage across the conducting output transistor, VS – VO. The power dissipated by the
output transistor is equal to the product of the output current
and the voltage across the conducting transistor, VS – VO.
The Safe Operating Area (SOA curve, Figure 2) shows the
permissible range of voltage and current.
VO
ZL
0.1µF(2)
10µF
+
V–
SAFE OPERATING AREA
1k
Output Current (mA)
NOTES: (1) ILIM connected to V– gives the maximum
current limit, 750mA (peak). (2) Connect 0.1µF capacitors
directly to package power-supply pins.
FIGURE 1. Basic Circuit Connections.
POWER SUPPLIES
The OPA547 operates from single (+8V to +60V) or dual
(±4V to ±30V) supplies with excellent performance. Most
behavior remains unchanged throughout the full operating
voltage range. Parameters which vary significantly with operating voltage are shown in the typical characteristic curves.
Some applications do not require equal positive and negative
output voltage swing. Power-supply voltages do not need to
be equal. The OPA547 can operate with as little as 8V
between the supplies and with up to 60V between the
supplies. For example, the positive supply could be set to
55V with the negative supply at –5V, or vice-versa.
ADJUSTABLE CURRENT LIMIT
The OPA547 features an accurate, user-selected current
limit. Current limit is set from 0mA to 750mA by controlling
the input to the ILIM pin. Unlike other designs which use a
power resistor in series with the output current path, the
OPA547 senses the load indirectly. This allows the current
limit to be set with a 0µA to 150µA control signal. In contrast,
other designs require a limiting resistor to handle the full
output current (750mA in this case).
8
Current-Limited
TC = 25°C
Output current may
be limited to less
than 500mA—see text.
100
TC = 85°C
TC = 125°C
Pulse Operation Only (