OPA547T

OPA547 OPA 547 O PA 547 O PA 547 SBOS056F – JANUARY 2002 – JULY 2005 High-Voltage, High-Current OPERATIONAL AMPLIFIER FEATURES q WIDE SUPPLY RANGE Single Supply: +8V to +60V Dual Supply: ±4V to ±30V q HIGH OUTPUT CURRENT: 500mA Continuous q WIDE OUTPUT VOLTAGE SWING q FULLY PROTECTED: Thermal Shutdown Adjustable Current Limit q OUTPUT DISABLE CONTROL q THERMAL SHUTDOWN INDICATOR q HIGH SLEW RATE: 6V/µs q LOW QUIESCENT CURRENT q PACKAGES: 7-Lead TO-220, Zip and Straight Leads 7-Lead DDPAK Surface-Mount DESCRIPTION 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. 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. APPLICATIONS q q q q q q VALVE, ACTUATOR DRIVERS SYNCHRO, SERVO DRIVERS POWER SUPPLIES TEST EQUIPMENT TRANSDUCER EXCITATION AUDIO AMPLIFIERS V+ – VIN OPA547 + VIN VO ILIM 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. 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. Copyright © 2002-2005, Texas Instruments Incorporated www.ti.com ABSOLUTE MAXIMUM RATINGS(1) 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 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. ELECTROSTATIC DISCHARGE SENSITIVITY 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. 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) 7-Lead DDPAK (FA) Surface-Mount 1234567 1234567 1234567 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 NOISE Input Voltage Noise Density, f = 1kHz Current Noise Density, f = 1kHz INPUT VOLTAGE RANGE Common-Mode Voltage Range: Positive Negative Common-Mode Rejection 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) 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 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 VO = ±25V, RL = 1kΩ VO = ±25V, RL = 50Ω 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 ±500 500 100 Linear Operation Linear Operation VCM = (V–) –0.1V to (V+) –3V (V+) –3 (V–) –0.1 80 CONDITION MIN TYP ±1 ±25 10 –100 ±0.5 ±5 90 200 (V+) –2.3 (V–) –0.2 95 107 || 6 109 || 4 115 110 1 6 See Typical Curve 18 0.004(3) (V+) –1.9 (V–) +1.3 (V+) –1.5 (V–) +0.8 MAX ±5 100 –500 ±50 UNITS VCM = 0, IO = 0 TA = –40°C to +85°C VS = ±4V to ±30V VCM = 0V VCM = 0V mV µV/°C µV/V nA nA/°C nA nV/√Hz fA/√Hz V V dB Ω || pF Ω || pF dB dB MHz V/µs kHz µs % V V V V mA mArms See Typical Curve 0 to ±750 ILIM = (5000)(4.75)/(31600Ω + RCL) ±10 ±30 See Typical Curve(4) mA A mA RCL = 31.6kΩ (ILIM = ±375mA), RL = 50Ω E/S Pin Open or Forced HIGH E/S Pin Forced LOW E/S Pin HIGH E/S Pin LOW (V–) +2.4 (V–) +0.8 –60 –65 1 3 (V–) +2.4 (V–) +3.5 (V–) +0.35 +160 +140 ±30 ±10 ±4 V V µA µA µs µs V V °C °C V V mA mA °C °C °C °C/W °C/W °C/W Sourcing 20µA Sinking 5µA, TJ > 160°C (V–) +0.8 ±4 ILIM Connected to V–, IO = 0 ILIM Connected to V– –40 –40 –55 f > 50Hz dc No Heat Sink ±30 ±15 +85 +125 +125 2 3 65 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 120 RL = 50Ω 100 Input Bias Current (nA) 80 Gain (dB) 60 40 20 0 –20 1 10 100 1k 10k 100k 1M 10M Frequency (Hz) φ G 0 Phase (°) –45 –90 –135 –180 –160 –140 –120 –100 –80 –60 –40 –20 0 –75 INPUT BIAS CURRENT vs TEMPERATURE VS = ±5V VS = ±30V IB –50 –25 0 25 50 75 100 125 150 Temperature (°C) ±600 ±500 CURRENT LIMIT vs TEMPERATURE RCL = 15.9kΩ Current Limit (mA) ±600 ±550 ±500 ±450 +400 ±350 ±300 ±250 ±200 CURRENT LIMIT vs SUPPLY VOLTAGE +ILIM RCL = 15.9kΩ –ILIM Current Limit (mA) ±400 ±300 ±200 ±100 –75 RCL = 31.6kΩ RCL = 31.6kΩ RCL = 63.4kΩ RCL = 63.4kΩ –50 –25 0 25 50 75 100 125 150 0 ±5 ±10 ±15 ±20 ±25 ±30 Temperature (°C) Supply Voltage (V) VOLTAGE NOISE DENSITY vs FREQUENCY 400 ±12 ±10 ±8 ±6 QUIESCENT CURRENT vs TEMPERATURE VS = ±30V IQ 300 Quiescent Current (mA) Voltage Noise (nV/√Hz) 200 VS = ±5V VS = ±30V IQ Shutdown 100 ±4 VS = ±5V ±2 –75 0 1 10 100 1k Frequency (Hz) 10k 100k 1M –50 –25 0 25 50 75 100 125 150 Temperature (°C) 4 OPA547 www.ti.com SBOS056F TYPICAL CHARACTERISTICS (Cont.) At TCASE = +25°C, VS = ±30V, and E/S pin open, unless otherwise noted. COMMON-MODE REJECTION vs FREQUENCY 100 90 80 120 100 80 POWER SUPPLY REJECTION vs FREQUENCY +PSRR CMR (dB) 60 50 40 30 20 10 100 1k 10k 100k 1M Frequency (Hz) PSR (dB) 70 60 40 –PSRR 20 0 1 10 100 1k Frequency (Hz) 10k 100k 1M 50 SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE OPEN-LOOP GAIN, COMMON-MODE REJECTION, AND POWER SUPPLY REJECTION vs TEMPERATURE 105 AOL 100 115 CMRR 95 PSRR 90 95 100 120 40 3 20 G = –1 10 CMRR (dB) G = +1 0 0 2k 4k 6k 8k 10k 12k 14k 16k 18k 20k Load Capacitance (pF) 85 –75 –50 –25 0 25 50 75 100 125 90 150 Temperature (°C) GAIN-BANDWIDTH PRODUCT AND SLEW RATE vs TEMPERATURE 1.25 Gain-Bandwidth Product (MHz) TOTAL HARMONIC DISTORTION+NOISE vs FREQUENCY 7.5 0.1 1 GBW SR+ RL = 50Ω G = +3 1W 7 Slew Rate (V/µs) 0.75 6.5 0.5 SR– 6 THD+N (%) 0.01 0.1W 0.001 6.25W 0.25 5.5 0 –75 –50 –25 0 25 50 75 100 125 5 150 0.0001 20 100 1k Frequency (Hz) 10k 20k Temperature (°C) OPA547 SBOS056F www.ti.com 5 PSRR, AOL (dB) Overshoot (%) TYPICAL CHARACTERISTICS (Cont.) At TCASE = +25°C, VS = ±30V, and E/S pin open, unless otherwise noted. OUTPUT VOLTAGE SWING vs OUTPUT CURRENT 3 2.5 2 1.5 1 0.5 0 0 100 200 300 400 500 600 Output Current (mA) (V–) –VO VSUPPLY – VOUT (V) OUTPUT VOLTAGE SWING vs TEMPERATURE 2.5 IO = +100mA IO = +500mA VSUPPLY– VOUT (V) 2 (V+) –VO 1.5 IO = –500mA 1 0.5 IO = –100mA 0 –75 –50 –25 0 25 50 75 100 125 150 Temperature (°C) MAXIMUM OUTPUT VOLTAGE SWING vs FREQUENCY 30 25 Output Voltage (Vp) 20 15 10 5 0 1k 10k 100k Frequency (Hz) 1M –1 –40 1 OUTPUT LEAKAGE CURRENT vs APPLIED OUTPUT VOLTAGE RL = 10Ω VS = ±30V Leakage Current (mA) Maximum Output Voltage Without Slew Rate Induced Distortion 0.5 RCL = 31.6kΩ RCL = ∞ RCL = 0 0 –0.5 Output Disabled VE/S < (V–) + 0.8V –30 –20 –10 0 10 20 30 Output Voltage (V) OFFSET VOLTAGE PRODUCTION DISTRIBUTION 20 18 Percent of Amplifiers (%) OFFSET VOLTAGE DRIFT PRODUCTION DISTRIBUTION 25 Typical production distribution of packaged units. 14 12 10 8 6 4 2 0 –5 –4 –3 –2 –1 0 1 2 3 4 5 Percent of Amplifiers (%) 16 Typical production distribution of packaged units. 20 15 10 5 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 Offset Voltage Drift (µV/°C) Offset Voltage (mV) 6 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 = 1, CL = 1000pF SMALL SIGNAL STEP RESPONSE G = 3, CL = 1000pF 50mV/div 2µs/div 50mV/div 2µs/div LARGE SIGNAL STEP RESPONSE G = 3, CL = 100pF, RL = 50Ω 10V/div 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. 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: R CL = (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. 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. V+ 10µF + 0.1µF(2) R1 5 2 7 6 G = 1+ R2 R1 R2 E/S VO ZL SAFE OPERATING AREA 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. OPA547 3 4 VIN 1 ILIM(1) 0.1µF(2) 10µF + V– SAFE OPERATING AREA NOTES: (1) ILIM connected to V– gives the maximum current limit, 750mA (peak). (2) Connect 0.1µF capacitors directly to package power-supply pins. Output Current (mA) 1k Current-Limited TC = 25°C Output current may be limited to less than 500mA—see text. TC = 85°C TC = 125°C FIGURE 1. Basic Circuit Connections. 100 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. Pulse Operation Only (