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.
www.ti.com
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 www.ti.com
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
www.ti.com
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 www.ti.com
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
www.ti.com
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 www.ti.com
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
www.ti.com
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 (
