PA74, PA76, PA74A, PA76A PA74/PA7P6A7 •4 /P7A6 •7 P4AA74/A7/67A6A Power Dual Operational Amplifiers FEATURES • LOW COST • WIDE COMMON MODE RANGE — Includes negative supply • WIDE SUPPLY VOLTAGE RANGE Single supply: 5V to 40V Split supplies: ±2.5V to ±20V 8-PIN TO-3 • HIGH EFFICIENCY — |Vs–2.2V| at 2.5A typ PACKAGE STYLE CE • HIGH OUTPUT CURRENT — 3A • LOW DISTORTION R2 R3 R4 +28V 9K 10K 10K +28V APPLICATIONS R1 5K _ _ • HALF & FULL BRIDGE MOTOR DRIVERS R5 • AUDIO POWER AMPLIFIER A M B 10K STEREO — 30W RMS per channel + 1/2 PA74 1/2 PA74 + BRIDGE — 60W RMS per package COMMAND R6 INPUT 10K • IDEAL FOR SINGLE SUPPLY SYSTEMS 0/10V FIGURE 1: BIDIRECTIONAL 5V — Peripherals, 12V — Automotive SPEED CONTROL FROM A 28V — Avionic SINGLE SUPPLY. DESCRIPTION TYPICAL APPLICATION The amplifier design consists of dual monolithic input and output R1 and R2 set up amplifier A in a non-inverting gain of 2.8. stages to achieve the desired input and output characteristics Amp B is set up as a unity gain inverter driven from the output of the PA74 and PA76. The input stage utilizes a dual power op of amp A. Note that amp B inverts signals about the reference amp on a single chip monolithic that drives the output stages. node, which is set at mid-supply (14V) by R5 and R6. When The output stages are configured in a non inverting unity gain the command input is 5V, the output of amp A is 14V. Since buffer configuration. The output stages of the amplifier are also this is equal to the reference node voltage, the output of amp compensated for stability. The PA74 and PA76 dual amplifiers are B is also 14V, resulting in 0V across the motor. Inputs more designed with both monolithic and hybrid technologies providing positive than 5V result in motor current flow from left to right a cost effective solution for applications requiring multiple ampli- (see Figure 1). Inputs less positive than 5V drive the motor in fiers per board or bridge mode configurations. Both amplifiers the opposite direction. are internally compensated but are not recommended for use The amplifiers are especially well-suited for this application. as unity gain followers. The extended common mode range allows command inputs This dual hybrid circuit utilizes a beryllia (BeO) substrate, thick as low as 0V. Its superior output swing abilities let it drive film resistors, ceramic capacitors and monolithic amplifiers to within 2V of supply at an output current of 2A. This means maximize reliability and power handling capability, minimize size that a command input that ranges from 0.714V to 9.286V will and give top performance. Ultrasonically bonded aluminum wires drive a 24V motor from full scale CCW to full scale CW at up provide reliable interconnections at all operating temperatures. to ±2A. A single power op amp with an output swing capability The 8-Pin TO-3 package is hermetically sealed and electrically of Vs –6 would require ±30V supplies and would be required to isolated. The use of compressible isolation washers voids the swing 48V p-p at twice the speed to deliver an equivalent drive. warranty. EXTERNAL CONNECTIONS EQUIVALENT SCHEMATIC ONE CHANNEL PA74 PA76 +VS -VS –IN,B +IN,B –V MOI BNIIATSOR OUT,B 7 6 -IN,B 7 6 S CGUARINRENT 8 +IN,B 8 OUT,A – B 5 5 + – + -IN +IN THERMAL TOP TOP B A PROTECT OUT VIEW + VIEW + – A 4 4 – CURRENT 1 +IN,A 1 -IN,A GAIN 3 3 OUT,A 2 OUT,B 2 -VS +V -IN,A +V +IN,A S S Copyright © Apex Microtechnology, Inc. 2012 OCT 2012 PwAw7w4.-a7p6Uex analog .com 1 (All Rights Reserved) PA74-76U REVH

PA74/76 • PA74A/76A ABSOLUTE MAXIMUM RATINGS SUPPLY VOLTAGE, total 5V to 40V OUTPUT CURRENT SOA POWER DISSIPATION, internal (per amplifier) 36W POWER DISSIPATION, internal (both amplifiers) 60W INPUT VOLTAGE, differential ±V S INPUT VOLTAGE, common mode +V , -V –0.5V S S JUNCTION TEMPERATURE, max1 150°C TEMPERATURE, pin solder–10 sec max 350°C TEMPERATURE RANGE, storage –65°C to 150°C OPERATING TEMPERATURE RANGE, case –55°C to 125°C SPECIFICATIONS PA74/76 PA74A/PA76A PARAMETER TEST CONDITIONS2 MIN TYP MAX MIN TYP MAX UNITS INPUT OFFSET VOLTAGE, initial 1.5 10 .5 7 mV OFFSET VOLTAGE, vs. temperature Full temperature range 20 10 µV/°C BIAS CURRENT, initial 100 500 * 250 nA COMMON MODE RANGE Full temperature range –V +V –1.3 * * V S S COMMON MODE REJECTION, DC Full temperature range 60 70 * * dB POWER SUPPLY REJECTION Full temperature range 60 90 * * dB CHANNEL SEPARATION I = 1A, F = 1kHz 50 70 * * dB OUT INPUT NOISE VOLTAGE R = 100Ω, f = 1 to 100KHz S GAIN OPEN LOOP GAIN Full temperature range 89 100 * * * dB GAIN BANDWIDTH PRODUCT A = 40dB 0.9 1.4 * * MHz V POWER BANDWIDTH V = 28V 13.6 * kHz O(P-P) OUTPUT CURRENT, peak 2.5 3 A SLEW RATE 0.5 1.4 * * V/µs VOLTAGE SWING Full temp. range, I = 100mA |V | –1.1 |V | –0.9 * * V O S S VOLTAGE SWING Full temp. range, I = 1A |V | –2.0 |V | –1.7 * * V O S S VOLTAGE SWING I = 2.5A (PA74, 76) |V | –3.5 |V | –2.9 * * V O S S VOLTAGE SWING I = 3.0A (PA74A, PA76A) |V | –4.0 |V | –3.3 V O S S POWER SUPPLY VOLTAGE, VSS3 30 40 * * * V CURRENT, quiescent, total 18 40 * * mA THERMAL RESISTANCE, junction to case DC, single amplifier 3.2 3.5 * * °C/W DC, both amplifiers4 1.9 2.1 * * °C/W AC, single amplifier 2.4 2.6 * * °C/W AC, both amplifiers4 1.4 1.6 * * °C/W RESISTANCE, junction to air 30 * * °C/W TEMPERATURE RANGE, case Meets full range specifications –25 85 –25 85 °C NOTES: * The specification of PA74A/PA76A is identical to the specification for PA74/PA76 in applicable column to the left. 1. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. 2. Unless otherwise noted, the following conditions apply: ±VS = ±15V, TC = 25°C. 3. +VS and –VS denote the positive and negative supply rail respectively. VSS denotes the total rail-to-rail supply voltage. 4. Rating applies when power dissipation is equal in the two amplifiers. The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or CAUTION subject to temperatures in excess of 850°C to avoid generating toxic fumes. 2 PA74-76U

PA74/76 • PA74A/76A NORMALIZED QUIESCENT CURRENT NORMALIZED QUIESCENT CURRENT X) vs. CASE TEMPERATURE X) vs. SUPPLY VOTAGE V) OUTPUT VOLTAGE SWING RRENT, I (Q211...085 RRENT, I (Q 111...012 PLY, V (DROP 334...050 U U P NT C 1.4 NT C 0.9 M SU 2.5 UIESCE 11..20 UIESCE 00..78 OP FRO 12..50 Q Q R D 0.8 D 0.6 D 1.0 MALIZE 0.6 MALIZE 0.5 LTAGE 0.5 R 0.4 R 0.4 O 0.0 O -80 -20 20 60 100 140 O 0 5 10 15 20 V 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 N N CASE TEMPERATURE, T (°C) SUPPLY VOLTAGE, V (V) OUTPUT CURRENT, I (A) C S O PULSE RESPONSE PULSE RESPONSE I 15 15 X) 1.3 B OUTPUT VOLTAGE, V (V)O -11-00505 AV+-RfVVVILN S = S== = = = 2 +1 1 -00+110KΩ15VH5VpVz OUTPUT VOLTAGE, V (V)O -11-00505 AV+Rf-VVVILN S = S== = = = 1 +1 1 -K+1001H1ΩV55zVpV RMALIZED BIAS CURRENT, I (B 100011......098712 -15 IN -15 IN NO 0.6 0 10 20 30 40 50 60 70 0 200 400 600 8001.0K1.2K1.4K -80 -40 0 40 80 120 160 TIME, t (s) TIME, t (s) TEMPERATURE, (°C) PHASE vs. FREQUENCY VOLTAGE GAIN vs. FREQUENCY V 80 80 X) 8 OS (OS V 120 60 E, G A 4 HASE, Ф (°) 126000 AIN, A (dB) 4200 FFSET VOLT 0 P G 0 O D E 240 Z -20 LI -4 A M R 280 -40 O 1K 10K 100K 1M 10M 1K 10K 100K 1M 10M N -40 0 40 80 120 FREQUENCY, f (Hz) FREQUENCY, f (Hz) TEMPERATURE, (°C) PA74-76U 3

PA74/76 • PA74A/76A GENERAL PARALLEL CONFIGURATION CONSIDERATIONS Please read Application Note 1 "General Operating Consider- LOSSES ations" which covers stability, supplies, heatsinking, mounting, The PA74 and PA76 utilize a parallel configuration to achieve SOA interpretation, and specification interpretation. Visit www. the desired current output requirements. The parallel configura- apexanalog.com for design tools that help automate tasks such tion inherently creates internal losses due to circulating currents. as calculations for stability, internal power dissipation, heatsink The circulating currents generate power losses through the selection; Apex Microtechnology's complete Application Notes current sharing resistors when delivering current to the load. library; Technical Seminar Workbook; and Evaluation Kits. SUPPLY CURRENT STABILITY CONSIDERATIONS The parallel configuration used in the PA74 and PA76 also All monolithic power op amps use output stage topologies generates supply currents while high voltage sign waves are that present special stability problems. This is primarily due to seen at the output. Listed below are the supply currents expected non-complementary (both devices are NPN) output stages with while running at a particular frequency and when VO ≈ 15Vpp, a mismatch in gain and phase response for different polarities note that the outputs are not loaded. of output current. It is difficult for the opamp manufacturer to optimize compensation for all operating conditions. Frequency Supply Current 100Hz 18mA SOA 1KHz 20mA A) 10 5KHz 32mA V, (S TWO AMPLIFIERS LOADED DC, TC = 25°C 1105KKHHzz 7550mmAA or - V S SATURATION OPERATION M + ONE AMPLIFIER O LOADED The parallel configuration used in the PA74 and PA76 is R sensitive to operation in the saturation region. The PA74 and T F 1.0 PA76 may exhibit large peak currents; this is mainly due to N E thermal protection limitations. R DC, T = 85°C R C CU POWER DERATING T 70 PU W) UT P ( 60 TWO AMPLIFIERS LOADED O 0.1 N, 1.0 10 100 O TI 50 SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE, V - V (V) A S O P SAFE OPERATING AREA (SOA) SSI 40 ONE AMPLIFIER LOADED DI The SOA curves combine the effect of all limits for this power R op amp. For a given application, the direction and magnitude E 30 W of the output current should be calculated or measured and O checked against the SOA curves. This is simple for resistive L P 20 A loads but more complex for reactive and EMF generating loads. N R 10 E T THERMAL CONSIDERATIONS N I 0 Thermal grease or a Apex Microtechnology TW03 thermal 0 25 50 75 100 125 washer, RCS = .1 to .2°C/W, is the only recommended interface CASE TEMPERATURE, T (°C) C for the PA74/76. Internal power dissipation increases directly with frequency therefore it is critical to sufficiently heat sink the PA74 and PA76. Even unloaded the PA74 and PA76 can dissipate up to 3 watts while running at higher frequencies. 4 PA74-76U

PA74/76 • PA74A/76A NEED TECHNICAL HELP? CONTACT APEX SUPPORT! For all Apex Microtechnology product questions and inquiries, call toll free 800-546-2739 in North America. For inquiries via email, please contact apex.support@apexanalog.com. International customers can also request support by contacting their local Apex Microtechnology Sales Representative. To find the one nearest to you, go to www.apexanalog.com IMPORTANT NOTICE Apex Microtechnology, Inc. has made every effort to insure the accuracy of the content contained in this document. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (expressed or implied). Apex Microtechnology reserves the right to make changes without further notice to any specifications or products mentioned herein to improve reliability. This document is the property of Apex Microtechnology and by furnishing this informa- tion, Apex Microtechnology grants no license, expressed or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual property rights. Apex Microtechnology owns the copyrights associated with the information contained herein and gives consent for copies to be made of the informa- tion only for use within your organization with respect to Apex Microtechnology integrated circuits or other products of Apex Microtechnology. This consent does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale. APEX MICROTECHNOLOGY PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN PRODUCTS USED FOR LIFE SUPPORT, AUTOMOTIVE SAFETY, SECURITY DEVICES, OR OTHER CRITICAL APPLICATIONS. PRODUCTS IN SUCH APPLICATIONS ARE UNDER- STOOD TO BE FULLY AT THE CUSTOMER OR THE CUSTOMER’S RISK. Apex Microtechnology, Apex and Apex Precision Power are trademarks of Apex Microtechnolgy, Inc. All other corporate names noted herein may be trademarks of their respective holders. Copyright © Apex Microtechnology, Inc. 2012 OCT 2012 PwAw7w4.-a7p6Uex analog .com 5 (All Rights Reserved) PA74-76U REVH