High Current High Power OPERATIONAL AMPLIFIER

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1 OPA High Current High Power OPERATIONAL AMPLIFIER FEATURES WIDE SUPPLY RANGE: ±V to ±V HIGH OUTPUT CURRENT: A Peak CLASS A/B OUTPUT STAGE: Low Distortion SMALL TO- PACKAGE APPLICATIONS SERVO AMPLIFIER MOTOR DRIVER SYNCRO EXCITATION AUDIO AMPLIFIER TEST PIN DRIVER DESCRIPTION The OPA 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. The OPA employs a laser-trimmed monolithic integrated circuit to bias the output transistors, V S 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. This hybrid integrated circuit is housed in a hermetically sealed TO- 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. Bias Circuit Current Limit R CL+ Out R CL V S International Airport Industrial Park Mailing Address: PO Box Tucson, AZ 7 Street Address: 7 S. Tucson Blvd. Tucson, AZ 7 Tel: () 7- Twx: 9-9- Cable: BBRCORP Telex: -9 FAX: () 9- Immediate Product Info: () - 9 Burr-Brown Corporation PDS-99A Printed in U.S.A. December, 99

2 SPECIFICATIONS ELECTRICAL At T C = + C and V S = ±VDC unless otherwise noted. OPAAM PARAMETER CONDITIONS MIN TYP MAX UNITS INPUT OFFSET VOLTAGE Initial Offset ± ± mv vs Temperature Full Temperature Range ± ± µv/ C vs Supply Voltage ± ± µv/v vs Power ± µv/w BIAS CURRENT Initial ± ± na vs Temperature Full Temperature Range ±. ±. na/ C vs Supply voltage ±. na/v OFFSET CURRENT Initial ± ± na vs Temperature Full Temperature Range ±. na/ C INPUT IMPEDANCE Common Mode MΩ Differential MΩ VOLTAGE RANGE () Common-Mode Voltage Full Temperature Range ±( V S ) ±( V S ) V Common-Mode Rejection V CM = V S V 7 db GAIN Open-Loop Gain at Hz Full Temperature Range, full load 9 db Gain-Bandwidth Product at MHz T C = + C, full load MHz Power Bandwidth T C = + C, I O = A, V O = Vp-p khz Phase Margin Full Temperature Range Degrees OUTPUT Voltage Swing I O = A ± ( V S ) ±( V S ) V Full Temperature Range, I O = A ±( V S ) ±( V S ) V Full Temperature Range, I O = ma ±( V S ) V Current, Peak ± A Settling Time to.% V step µs Slew Rate R L =.Ω ±.. V/µs Capacitive Load: Unity Gain Full Temperature Range. nf Gain> Full Temperature Range SOA () POWER SUPPLY Voltage Full Temperature Range ± ± ± V Current, Quiescent ma THERMAL RESISTANCE AC Junction to Case () f > Hz.9. C/W DC Junction to Case f > Hz.. C/W Junction to Air C/W TEMPERATURE RANGE Case + C NOTES: () +V S and V S denote the positive and negative supply voltage respectively. Total V S is measured from +V S to V S. () SOA = Safe Operating Area. () Rating applies if the output current alternates between both output transistors at a rate faster than Hz. 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. OPA

3 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION Supply Voltage, +V S to V S... V Output Current: Source... A Sink... see SOA Power Dissipation, internal ()... 7W Input Voltage: Differential... ±( V S V) Common-mode... ±V S Temperature: Junction ()... + C Pin solder(s)... + C Temperature Range: Storage... C to + C Operating (case)... C to + C Top View +In +V S +Current Limit (+R CL ) Output NOTE: () Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. In 7 Current Limit ( R CL ) ORDERING INFORMATION V S No Internal Connection TEMPERATURE MODEL PACKAGE RANGE OPAAM TO- C to + C USA OEM PRICES 99 + $. $. $. MECHANICAL M Package -Pin Metal TO- Seating Plane J A B D H G E C K INCHES MILLIMETERS DIM MIN MAX MIN MAX A B C D E....7 F BASIC BASIC G. BASIC.7 BASIC H..9.. J K....7 Q....9 R NOTE: Leads in true position within." (.mm) R at MMC at seating plane. Pin numbers shown for reference only. Numbers may not be marked on package. Q F 7 R OPA

4 TYPICAL PERFORMANCE CURVES T A = + C, V S = ±VDC unless otherwise noted. 7 POWER DERATING. BIAS CURRENT Internal Power Dissipation, P (W) T = T A T = T C Normalized Bias Current, I B Temperature, T ( C) 7 Case Temperature, T C ( C). CURRENT LIMIT SMALL SIGNAL RESPONSE. Current Limit, I LIM (A).... R CL =.Ω R CL =.Ω Open Loop Gain, A (db). 7 Case Temperature, T C ( C) k k k M M PHASE RESPONSE POWER RESPONSE Phase φ (Degrees) 9 Output Voltage, V O (V p p). +V S + V S = V k k k M M. 7 Frequency, f (khz) OPA

5 TYPICAL PERFORMANCE CURVES (CONT) T A = + C, V S = ±VDC unless otherwise noted. Common-Mode Rejection,CMR(dB) COMMON-MODE REJECTION k k k M Output Voltage, V O (V) PULSE RESPONSE V IN = ±V, t R = ns Time, t (µs) INPUT NOISE HARMONIC DISTORTION Input Noise Voltage, V N (nv/ Hz) 7 Distortion (%).... P O = mw P O = mw V S = ±V R L = Ω G = k k k. k k k k k. QUIESCENT CURRENT + OPEN-LOOP GAIN. + Normalized, I Q C C to + C Normalized, A (db) + T C = + C T C = C T C = + C..7 7 Total Supply Voltage, V S (V) 7 Total Supply Voltage, V S (V) OPA

6 APPLICATIONS INFORMATION POWER SUPPLIES Specifications for the OPA are based on a nominal operating voltage ±V. A single power supply or unbalanced supplies may be used so long as the maximum total operating voltage (total of +V S and V S ) is not greater than V. CURRENT LIMITS Current limit resistors must be provided for proper operation. Independent positive and negative current limit values may be selected by choice of R CL+ and R CL, respectively. Resistor values are calculated by: R CL =./I LIM (amps). 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. HEAT SINKING 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- for further details. SAFE OPERATING AREA (SOA) 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 ). 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- for details on SOA. Output Current (A)..... Current Limited T C = + C Thermal Limit Voltage Across Output Transistor (V) FIGURE. Safe Operating Area. T C = + C t = ms Secondary Breakdown t = ms OPA

High Current, High Power OPERATIONAL AMPLIFIER

High Current, High Power OPERATIONAL AMPLIFIER OPA51 High, High Power OPERATIONAL AMPLIFIER FEATURES HIGH OUTPUT CURRENT: ±1A Peak WIDE POWER SUPPLY RANGE: ±1 to ±V LOW QUIESCENT CURRENT:.mA ISOLATED CASE TO-3 PACKAGE APPLICATIONS MOTOR DRIVER SERVO