Power Operational Amplifier FEATURES • POWER MOS TECHNOLOGY — 2A peak rating • HIGH GAIN BANDWIDTH PRODUCT — 150MHz • VERY FAST SLEW RATE — 200V/µs • PROTECTED OUTPUT STAGE — Thermal shutoff • EXCELLENT LINEARITY — Class A/B output • WIDE SUPPLY RANGE — ±12V to ±40V • LOW BIAS CURRENT, LOW NOISE — FET input APPLICATIONS • VIDEO DISTRIBUTION AND AND AMPLIFICATION • HIGH SPEED DEFLECTION CIRCUITS • POWER TRANSDUCERS TO 2MHz • COAXIAL LINE DRIVERS • POWER LED OR LASER DIODE EXCITATION DESCRIPTION The PA09 is a high voltage, high output current operational amplifier optimized to drive a variety of loads from DC through the video frequency range. Excellent input accuracy is achieved with a dual monolithic FET input transistor which is cascoded by two high voltage transistors to provide outstanding common mode characteristics. All internal current and voltage levels are referenced to a zener diode biased on by a current source. As a result, the PA09 exhibits superior DC and AC stability over a wide supply and temperature range. High speed and freedom from second breakdown is assured by a complementary Power MOS output stage. For optimum linearity, especially at low levels, the Power MOS transistors are biased in the class A/B mode. Thermal shutoff provides full protection against overheating and limits the heatsink requirements to dissipate the internal power losses under normal operating conditions. A built-in current limit protects the amplifier against overloading.Transient inductive load kickback protection is provided by two internal clamping diodes. External phase compensation allows the user maximum flexibility in obtaining the optimum slew rate and gain bandwidth product at all gain settings. For continuous operation under load, a heatsink of proper rating is recommended. This hybrid integrated circuit utilizes thick film (cermet) resistors, ceramic capacitors and silicon semiconductor chips to maximize reliability, minimize size and give top performance. Ultrasonically bonded aluminum wires provide reliable interconnections at all operating temperatures. The CE, 8-pin TO-3 package is hermeti+37V di = 2A/µs CC 5pF cally sealed and elecdt 3 trically isolated. The 7 4 i = Vi /RS 8 use of compressible VI 1 thermal washers and/ PA09 5 CF LY or improper mount470pF 13µH ing torque will void 6 RD 1Ω the product warranty. –37V RF 3.9K Please see “General Operating Consider100Ω R S ations” . .5Ω FIGURE 1. PA09 AS DEFLECTION AMPLIFIER 8-PIN TO-3 PACKAGE STYLE CE DEFLECTION AMPLIFIER (FIGURE 1) The deflection amplifier circuit of Figure 1 achieves arbitrary beam positioning for a fast heads-up display. Maximum transition times are 4µs while delivering 2A pk currents to the 13mH coil. The key to this circuit is the sense resistor (RS) which converts yoke current to voltage for op amp feedback. This negative feedback forces the coil current to stay exactly proportional to the control voltage. The network consisting of RD, RF and CF serves to shift from a current feedback via RS to a direct voltage feedback at high frequencies. This removes the extra phase shift caused by the inductor thus preventing oscillation. See Application Note 5 for details of this and other precision magnetic deflection circuits. NOTE: Input offset voltage trim optional. RT = 10KΩ MAX Copyright © Apex Microtechnology, Inc. 2012 (All Rights Reserved)

PA09 • PA09A ABSOLUTE MAXIMUM RATINGS SUPPLY VOLTAGE, +VS to –VS OUTPUT CURRENT, within SOA POWER DISSIPATION, internal1 INPUT VOLTAGE, differential INPUT VOLTAGE, common mode TEMPERATURE, pin solder - 10s TEMPERATURE, junction1 TEMPERATURE RANGE, storage OPERATING TEMPERATURE RANGE, case SPECIFICATIONS TEST CONDITIONS 2 INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE, vs. temperature OFFSET VOLTAGE, vs. supply BIAS CURRENT, initial BIAS CURRENT, vs. supply OFFSET CURRENT, initial INPUT IMPEDANCE, DC INPUT CAPACITANCE COMMON MODE VOLTAGE RANGE3 COMMON MODE REJECTION, DC GAIN OPEN LOOP GAIN at 15Hz...

OUTPUT VOLTAGE SWING PHASE RESPONSE COMMON MODE REJECTION POWER SUPPLY REJECTION, PSR (dB) OPEN LOOP PHASE, Ф (°) INPUT NOISE POWER SUPPLY REJECTION POWER RESPONSE SLEW RATE vs. COMP. GAIN AND SLEW RATE, (V/µs) VOLTAGE DROP FROM SUPPLY (V) OPEN LOOP GAIN, A (dB) QUIESCENT CURRENT NORMALIZED QUIESCENT CURRENT, IQ (X) CURRENT LIMIT, ILIM (A) INPUT NOISE VOLTAGE, VN (nV/√Hz) INTERNAL POWER DISSIPATION, P (W) SMALL SIGNAL RESPONSE COMMON MODE REJECTION, CMR (dB) CURRENT LIMIT COMMON MODE VOLTAGE, VCM (VPP) POWER DERATING COMMON MODE VOLTAGE

PA09 • PA09A GENERAL Please read Application Note 1 "General Operating Considerations" which covers stability, supplies, heat sinking, mounting, current limit, SOA interpretation, and specification interpretation. Visit www.apexanalog.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit; heat sink selection; Apex Microtechnology's complete Application Notes library; Technical Seminar Workbook; and Evaluation Kits. SUPPLY VOLTAGE The specified voltage (±VS) applies for a dual (±) supply having equal voltages. A nonsymmetrical...

PA09 • PA09A current. Output voltage is given as peak. Currents are average responding supply readings, but AC monitoring will reveal current pulses corresponding to periods of high slew rate. For QUIESCENT vs. SINE DRIVE QUIESCENT vs. SQUARE DRIVE Due to its large bandwidth the PA09 is more likely to oscillate than lower bandwidth Power Operational Amplifiers. To prevent oscillations a reasonable phase margin must be maintained by: 1. Pay very careful attention to supply bypassing and circuit grounding. This is very important when step functions are driven and the PA09 shares supplies with more...

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