® OPA511 High Current—High Power OPERATIONAL AMPLIFIER FEATURES APPLICATIONS ● WIDE SUPPLY RANGE: ±10V to ±30V ● SERVO AMPLIFIER ● HIGH OUTPUT CURRENT: 5A Peak ● MOTOR DRIVER ● CLASS A/B OUTPUT STAGE: ● SYNCRO EXCITATION ● AUDIO AMPLIFIER Low Distortion ● SMALL TO-3 PACKAGE ● TEST PIN DRIVER DESCRIPTION providing excellent low-level signal fidelity and high output voltage swing. The reduced internal parts count made possible with this bias IC improves performance and reliability. The OPA511 is a high voltage, high current operational amplifier designed to drive a wide variety of resistive and reactive loads. Its complementary class A/B output stage provides superior performance in applications requiring freedom from cross-over distortion. User-set current limit circuitry provides protection to the amplifier and load in fault conditions. This hybrid integrated circuit is housed in a hermetically sealed TO-3 package and all circuitry is electrically isolated from the case. This allows direct mounting to a chassis or heat sink without cumbersome insulating hardware and provides optimum heat transfer. The OPA511 employs a laser-trimmed monolithic integrated circuit to bias the output transistors, 3 –V S 2 4 5 Bias Circuit Current Limit 1 Out 8 6 RCL+ RCL– –VS International Airport Industrial Park • Mailing Address: PO Box 11400 Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP • • Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706 Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132 © 1985 Burr-Brown Corporation PDS-599A Printed in U.S.A. December, 1993 SPECIFICATIONS ELECTRICAL At TC = +25°C and VS = ±28VDC unless otherwise noted. OPA511AM PARAMETER CONDITIONS MIN TYP MAX UNITS ±5 ±10 ±35 ±20 ±10 ±65 ±200 mV µV/°C µV/V µV/W ±15 ±0.05 ±0.02 ±40 ±0.4 nA nA/°C nA/V ±5 ±0.01 ±10 nA nA/°C INPUT OFFSET VOLTAGE Initial Offset vs Temperature vs Supply Voltage vs Power BIAS CURRENT Initial vs Temperature vs Supply voltage OFFSET CURRENT Initial vs Temperature Full Temperature Range Full Temperature Range Full Temperature Range INPUT IMPEDANCE Common Mode Differential VOLTAGE RANGE (1) Common-Mode Voltage Common-Mode Rejection GAIN Open-Loop Gain at 10Hz Gain-Bandwidth Product at 1MHz Power Bandwidth Phase Margin OUTPUT Voltage Swing Full Temperature Range, IO = 2A Full Temperature Range, IO = 56mA Current, Peak Settling Time to 0.1% Slew Rate Capacitive Load: Unity Gain Gain>4 POWER SUPPLY Voltage Current, Quiescent 200 10 MΩ MΩ Full Temperature Range VCM = VS – 6V ±(|VS| – 6) 70 ±(|VS| – 3) 110 V dB Full Temperature Range, full load TC = +25°C, full load TC = +25°C, IO = 4A, VO = 40Vp-p Full Temperature Range 91 113 1 23 45 dB MHz kHz Degrees IO = 5A ±(|VS| – 6) ±(|VS| – 5) ± (|VS| – 8) ±(|VS| – 5) 15 ±(|VS| – 5) V V V ±5 2V step RL = 2.5Ω Full Temperature Range Full Temperature Range ±1.0 2 1.8 3.3 SOA(2) ±10 Full Temperature Range A µs V/µs nF ±28 20 ±30 30 V mA 1.9 2.4 30 2.1 2.6 °C/W °C/W °C/W +85 °C THERMAL RESISTANCE AC Junction to Case (3) DC Junction to Case Junction to Air f > 60Hz f > 60Hz TEMPERATURE RANGE Case –25 NOTES: (1) +VS and –VS denote the positive and negative supply voltage respectively. Total VS is measured from +VS to –VS. (2) SOA = Safe Operating Area. (3) Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. 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. ® OPA511 2 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION Supply Voltage, +VS to –VS .................................................................. 68V Output Current: Source .......................................................................... 5A Sink ..................................................................... see SOA Power Dissipation, internal(1) ............................................................... 67W Input Voltage: Differential ......................................................... ±(|VS| – 3V) Common-mode ............................................................. ±VS Temperature: Junction(1) ................................................................ +200°C Pin solder(10s) ........................................................ +300°C Temperature Range: Storage ......................................... –65°C to +150°C Operating (case) ............................. –25°C to +85°C Top View +VS 3 1 4 5 8 –In 6 –VS ORDERING INFORMATION PACKAGE TEMPERATURE RANGE TO-3 –25°C to +85°C OPA511AM 2 +In NOTE: (1) Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. MODEL +Current Limit (+RCL) 7 Output –Current Limit (–RCL) No Internal Connection MECHANICAL M Package — 8-Pin Metal TO-3 A B DIM A B C D E F G H J K Q R C E K Seating Plane D H J G INCHES MIN MAX 1.510 1.550 .745 .770 .260 .300 .038 .042 .080 .105 40° BASIC .500 BASIC 1.182 1.192 .591 .596 .400 .500 .151 .161 .980 1.020 MILLIMETERS MIN MAX 38.35 39.37 18.92 19.56 6.60 7.62 0.97 1.07 2.03 2.67 40° BASIC 12.70 BASIC 30.02 30.28 15.01 15.14 10.16 12.70 3.84 4.09 24.89 25.91 NOTE: Leads in true position within 0.01" (0.25mm) R at MMC at seating plane. Pin numbers shown for reference only. Numbers may not be marked on package. Q F 2 3 7 6 1 4 5 8 R ® 3 OPA511 TYPICAL PERFORMANCE CURVES TA = +25°C, VS = ±28VDC unless otherwise noted. BIAS CURRENT 2.8 60 2.5 Normalized Bias Current, IB Internal Power Dissipation, P (W) POWER DERATING 70 50 40 T = TC 30 20 T = TA 10 2.2 1.9 1.6 1.3 1.0 0.7 0 0 20 40 60 80 100 Temperature, T (°C) 120 –50 140 –25 120 3.0 100 2.5 RCL = 0.3Ω 2.0 1.5 RCL = 0.6Ω 1.0 0.5 125 1M 10M 80 60 40 20 0 0 –20 –50 –25 0 25 50 75 100 125 1 10 100 Case Temperature, TC (°C) PHASE RESPONSE 1k 10k 100k Frequency, f (Hz) POWER RESPONSE 0 100 –30 68 Output Voltage, VO (V p–p) Phase φ (Degrees) 100 SMALL SIGNAL RESPONSE 3.5 Open Loop Gain, A (dB) Current Limit, ILIM (A) CURRENT LIMIT 0 25 50 75 Case Temperature, TC (°C) –60 –90 –120 –150 –180 |+VS| + |–VS| = 60V 46 32 22 15 10 6.8 4.6 –210 1 10 100 1k 10k 100k Frequency, f (Hz) 1M 10M 10 30 Frequency, f (kHz) ® OPA511 20 4 50 70 100 TYPICAL PERFORMANCE CURVES (CONT) TA = +25°C, VS = ±28VDC unless otherwise noted. PULSE RESPONSE COMMON-MODE REJECTION 8 VIN = ±5V, tR = 100ns 6 100 Output Voltage, VO (V) Common-Mode Rejection,CMR(dB) 120 80 60 40 4 2 0 –2 –4 20 –6 0 –8 1 10 100 1k 10k 100k –2 1M 0 2 4 Frequency, f (Hz) 100 3 70 1 50 0.3 Distortion (%) Input Noise Voltage, VN (nV/√Hz) 10 12 14 HARMONIC DISTORTION INPUT NOISE 40 30 PO = 50mW 0.1 0.03 20 PO = 32mW VS = ±28V RL = 8Ω G = 10 0.01 0.003 10 10 100 1k 10k 100 100k 300 1k QUIESCENT CURRENT 10k 30k 100k OPEN-LOOP GAIN +6 1.2 +4 Normalized, A (dB) 1.3 1.1 3k Frequency, f (Hz) Frequency, f (Hz) Normalized, IQ 6 8 Time, t (µs) +85°C 1.0 –25°C to +25°C 0.9 0.8 +2 TC = –25°C 0 TC = +25°C TC = +85°C –2 –4 0.7 –6 20 30 40 50 60 70 80 20 Total Supply Voltage, VS (V) 30 40 50 60 70 80 Total Supply Voltage, VS (V) ® 5 OPA511 APPLICATIONS INFORMATION POWER SUPPLIES HEAT SINKING Specifications for the OPA511 are based on a nominal operating voltage ±28V. A single power supply or unbalanced supplies may be used so long as the maximum total operating voltage (total of +VS and –VS) is not greater than 68V. Power amplifiers are rated by case temperature (not ambient temperature). The maximum allowable power dissipation is a function of the case temperature as shown in the power derating curve. Load characteristics, signal conditions, and power supply voltage determine the power dissipated by the amplifier. The case temperature will be determined by the heat sinking conditions. Sufficient heat sinking must be provided to keep the case temperature within safe bounds given the power dissipated and ambient temperature. See Application Note AN-83 for further details. CURRENT LIMITS Current limit resistors must be provided for proper operation. Independent positive and negative current limit values may be selected by choice of RCL+ and RCL–, respectively. Resistor values are calculated by: SAFE OPERATING AREA (SOA) RCL = 0.65/ILIM (amps) –0.01 The safe area plot provides a comprehensive summary of the power handling limitations of a power amplifier, including maximum current, voltage and power as well as the secondary breakdown region (see Figure 1). It shows the allowable output current as a function of the power supply to output voltage differential (voltage across the conducting power device). See Application Note AN-123 for details on SOA. This is the nominal current limit value at room temperature. The maximum output current decreases at high temperature as shown in the typical performance curve. Most wirewound resistors are satisfactory, but some highly inductive types may cause loop stability problems. Be sure to evaluate performance with the actual resistors to be used in production. 25 °C it T C s 2 s Lim 5m Output Current (A) al 1m =+ C erm t= T Th Current Limited t= 6 5 4 3 =+ 85° C 1 0.8 0.6 0.5 0.4 0.3 Secondary Breakdown 0.2 5 6 7 8 910 15 20 30 40 50 60 70 Voltage Across Output Transistor (V) FIGURE 1. Safe Operating Area. ® OPA511 6