PA07PA07 • PA07A • PA07A PA07, P r o d u c t IPA07A Innnnoovvaa t i o n FFr roomm FET Input Power Operational Amplifier FEATURES • Low bias current — FET Input • Protected output STAGE — Thermal Shutoff • Excellent linearity — Class A/B Output • Wide supply range — ±12V to ±50V • High output current — ±5A peak 8-pin TO-3 PACKAGE STYLE CE APPLICATIONS • Motor, valve and actuator control • Magnetic deflection circuits up to 4A • Power transducers up to 100kHz • Temperature control up to 180W • Programmable power supplies up to 90V • Audio amplifiers up to 60W RMS TYPICAL APPLICATION CL RL R F1 R F2 PA07 The PA07 is a high voltage, high output current operational amplifier designed to drive resistive, inductive and capacitive loads. For optimum linearity, especially at low levels, the output stage is biased for class A/B operation using a thermistor compensated base-emitter voltage multiplier circuit. A thermal shutoff circuit protects against overheating and minimizes heatsink requirements for abnormal operating conditions. The safe operating area (SOA) can be observed for all operating conditions by selection of user programmable current limiting resistors. Both amplifiers are internally compensated for all gain settings. For continuous operation under load, a heatsink of proper rating is recommended. This hybrid circuit utilizes thick film (cermet) resistors, ceramic capacitors and semiconductor chips to maximize reliability, minimize size and give top performance. Ultrasonically bonded aluminum wires provide reliable interconnections at all operating temperatures. The 8-pin TO-3 package is hermetically sealed and electrically isolated. The use of compressible washers and/or improper mounting torque will void the product warranty. Please see “General Operating Considerations”. EQUIVALENT SCHEMATIC 3 7 Q2 D1 Q3 C1 Q6B +V –32V –V PD1 C3 Q10 4 Q12A Q11 Q19 Q12B Q15 OUT 1 OUTPUT 4 TOP VIEW RS Q16 Q18 +IN Q17B Q17A 2 3 RT R CL+ CL+ +VS 8 C4 D3 PD2 Negates optoelectronic instabilities Lead network minimizes overshoot SEQUENTIAL POSITION CONTROL Position is sensed by the differentially connected photo diodes, a method that negates the time and temperature variations of the optical components. Off center positions produce an error current which is integrated by the op amp circuit, driving the system back to center position. A momentary switch contact forces the system out of lock and then the integrating capacitor holds drive level while both diodes are in a dark state. When the next index point arrives, the lead network of C1 and R1 optimize system response by reducing overshoot. The very low bias current of the PA07 augments performance of the integrator circuit. Q7 1 5 LIGHT .68Ω 2 C2 Q9 MOTOR R CL– EXTERNAL CONNECTIONS Q6A Q4 Q5 Q8 V = 28 EMF = 14V R W = 14Ω .68Ω DESCRIPTION Q1 CF R CL+ +32V –IN R CL– 5 –VS D2 6 6 8 CL– 7 BAL RS= ( VS+ + –VS ) RT/1.6 NOTE: Input offset voltage trim optional. RT = 10KΩ MAX PA07U http://www.cirrus.com Copyright © Cirrus Logic, Inc. 2009 (All Rights Reserved) MAY 20091 APEX − PA07UREVP PA07 • PA07A P r o d u c t I n n o v a t i o nF r o m 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 PARAMETER TEST CONDITIONS 2 INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE, vs. temperature OFFSET VOLTAGE, vs. supply OFFSET VOLTAGE, vs. power BIAS CURRENT, initial3 BIAS CURRENT,vs. supply OFFSET CURRENT, initial3 INPUT IMPEDANCE, DC INPUT CAPACITANCE COMMON MODE VOLTAGE RANGE4 COMMON MODE REJECTION, DC TC = 25°C Full temperature range TC = 25°C Full temperature range TC = 25°C TC = 25°C TC = 25°C TC = 25°C TC = 25°C Full temperature range Full temperature range, VCM = ±20V GAIN OPEN LOOP GAIN at 15Hz GAIN BANDWIDTH PRODUCT @ 1MHz POWER BANDWIDTH PHASE MARGIN TC = 25°C, RL = 15Ω TC = 25°C, RL = 15Ω TC = 25°C, RL = 15Ω Full temperature range, RL = 15Ω OUTPUT VOLTAGE SWING4 VOLTAGE SWING4 VOLTAGE SWING4 CURRENT, peak SETTLING TIME to .1% SLEW RATE CAPACITIVE LOAD, unity gain CAPACITIVE LOAD, gain>4 Full temp. range, IO = 5A Full temp. range, IO = 2A Full temp. range, IO = 90mA TC = 25°C TC = 25°C, 2V step TC = 25°C Full temperature range Full temperature range POWER SUPPLY VOLTAGE CURRENT, quiescent Full temperature range TC = 25°C THERMAL RESISTANCE, AC, junction to case5 RESISTANCE, DC, junction to case RESISTANCE, junction to air TEMPERATURE RANGE, case MIN ±VS–10 89 ±VS–5 ±VS–5 ±VS–5 5 ±12 F>60Hz F<60Hz Meets full range specifications –25 PA07 TYP .5 10 8 20 5 .01 2.5 1011 4 120 95 1.3 18 70 100V 5A 67W ±50V ±VS 300°C 200°C –65 to +150°C –55 to +125°C PA07A MAX MIN TYP MAX ±2 ±.25 ±.5 30 5 10 * 10 50 3 10 * 50 1.5 10 * * * * mV µV/°C µV/V µV/W pA pA/V pA Ω pF V dB * * * * dB MHz kHz ° * * * * * * 1 * SOA * V V V A µs V/µs nF ±35 18 ±50 * 30 * * V mA 1.9 2.4 30 25 2.1 2.6 +85 * * * * * * * * 1.5 5 * UNITS * * °C/W °C/W °C/W °C NOTES: * The specification of PA07A is identical to the specification for PA07 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. The power supply voltage for all specifications is the TYP rating unless otherwise noted as a test condition. 3. Doubles for every 10°C of temperature increase. 4. +VS and –VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to –VS. 5. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. CAUTION 2 The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or subject to temperatures in excess of 850°C to avoid generating toxic fumes. PA07U PA07 • PA07A 40 30 20 10 T = TA 0 0 1 .25 .06 –15 80 –60 PHASE, Ф (°) –30 60 40 20 –210 COMMON MODE REJECTION OUTPUT VOLTAGE, VO (VP-P) 100 80 60 40 20 0 1 10K .1M 100 1K FREQUENCY, F (Hz) 10 HARMONIC DISTORTION 10 G =10 PA07U 8Ω = L L .01 100 L R V, 36 = S ,V W 60 = P O = O P .03 V, W 25 m = S ,V O P 50 .1 W = 50 .3 R ,R = 1 = 8Ω 4Ω 3 300 1K 3K 10K 30K FREQUENCY, F (Hz) .1M 1 10 .5 0 –50 –25 50 0 25 75 100 CASE TEMPERATURE, TC (°C) POWER RESPONSE 4 2 0 –2 –4 –6 0 2 4 6 8 TIME, t (µs) 10 32 22 15 10 6.8 T C = –25C 1.2 1.0 .8 .6 .4 40 T C = 25C T C = 85C C T C = 125 50 60 70 80 90 100 TOTAL SUPPLY VOLTAGE, VS (V) INPUT NOISE 10 QUIESCENT CURRENT 1.4 20K 30K 50K 70K .1M FREQUENCY, F (Hz) 20 12 1.6 |+VS| + |-VS| = 70V 46 4.6 10K 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) VIN = 5V, tr = 100ns |+VS| + |-VS| = 100V 68 PULSE RESPONSE 6 –8 1M RCL = 0.6Ω 1.0 100 8 NORMALIZED QUIESCENT CURRENT, IQ (X) 120 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) 1.5 PHASE RESPONSE –150 –20 RCL = 0.3Ω 2.0 105 –120 –180 10 45 65 85 25 TEMPERATURE, TC (°C) –90 0 1 5 0 100 OPEN LOOP GAIN, AOL (dB) COMMON MODE REJECTION, CMR (dB) 4 SMALL SIGNAL RESPONSE 120 DISTORTION, THD (%) 16 20 40 60 80 100 120 140 TEMPERATURE, TC (°C) 2.5 CURRENT LIMIT, ILIM (A) 50 64 OUTPUT VOLTAGE, VO (VP-P) T = TC CURRENT LIMIT 3.0 INPUT NOISE VOLTAGE, VN (nV/√Hz) 60 BIAS CURRENT 256 VOLTAGE DROP FROM SUPPLY, VSAT (V) POWER DERATING 70 NORMALIZED BIAS CURRENT, IB (X) INTERNAL POWER DISSIPATION, P (W) P r o d u c t I n n o v a t i o nF r o m 6 4 2 10 1K 100 10K FREQUENCY, F (Hz) .1M OUTPUT VOLTAGE SWING 6 5 TC = °C –25 4 TC = 3 TC = 2 25°C 85°C 1 0 0 2 3 1 4 5 OUTPUT CURRENT, IO (A) 6 3 PA07 • PA07A P r o d u c t I n n o v a t i o nF r o m 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.Cirrus.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit; heat sink selection; Apex Precision Power’s complete Application Notes library; Technical Seminar Workbook; and Evaluation Kits. SAFE OPERATING AREA (SOA) The output stage of most power amplifiers has three distinct limitations: 1. The current handling capability of the wire bonds. 2. The second breakdown effect which occurs whenever the simultaneous collector current and collector-emitter voltage exceed specified limits. 3. The junction temperature of the output transistors. OUTPUT CURRENT FROM +VS OR – VS (A) 5.0 4.0 3.0 2.0 1.5 Tc =8 Tc 5°C =1 TH 25 ER ste °C MA L ad ys t= ta te SE 5m CO s ND t= t= 1m 0 . 5 s ms BR EA 1.0 .8 KD OW N .6 .4 .3 .2 10 15 20 25 30 35 40 50 60 70 80 100 SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE VS – VO (V) SAFE OPERATING AREA CURVES The SOA curves combine the effect of these limits. For a given application, the direction and magnitude of the output current should be calculated or measured and checked against the SOA curves. This is simple for resistive loads but more complex for reactive and EMF generating loads. However, the following guidelines may save extensive analytical efforts. 1. For DC outputs, especially those resulting from fault conditions, check worst case stress levels against the new SOA graph. For sine wave outputs, use Power Design1 to plot a load line. Make sure the load line does not cross the 0.5ms limit and that excursions beyond any other second breakdown line do not exceed the time label, and have a duty cycle of no more than 10%. For other waveform outputs, manual load line plotting is recommended. Applications Note 22, SOA AND LOAD LINES, will be helpful. A Spice type analysis can be very useful in that a hardware setup often calls for instruments or amplifiers with wide common mode rejection ranges. 4 2. The amplifier can handle any reactive or EMF generating load and short circuits to the supply rail or common if the current limits are set as follows at TC = 85°C: SHORT TO ±VS SHORT TO C, L, OR EMF LOAD COMMON ±VS 50V .21A .61A 40V .3A .87A 30V .46A 1.4A 20V .87A 2.5A 15V 1.4A 4.0A These simplified limits may be exceeded with further analysis using the operating conditions for a specific application. 3. The output stage is protected against transient flyback. However, for protection against sustained, high energy flyback, external fast-recovery diodes should be used. THERMAL SHUTDOWN PROTECTION The thermal protection circuit shuts off the amplifier when the substrate temperature exceeds approximately 150°C. This allows heatsink selection to be based on normal operating conditions while protecting the amplifier against excessive junction temperature during temporary fault conditions. Thermal protection is a fairly slow-acting circuit and therefore does not protect the amplifier against transient SOA violations (areas outside of the TC = 25°C boundary). It is designed to protect against short-term fault conditions that result in high power dissipation within the amplifier. If the conditions that cause thermal shutdown are not removed, the amplifier will oscillate in and out of shutdown. This will result in high peak power stresses, will destroy signal integrity and reduce the reliability of the device. CURRENT LIMIT Proper operation requires the use of two current limit resistors, connected as shown in the external connections diagram. The minimum value for RCL is .12Ω, however, for optimum reliability it should be set as high as possible. Refer to the “General Operating Considerations” section of the handbook for current limit adjust details. Note 1. Power Design is a self-extracting Excel spreadsheet available free from www.Cirrus.com 1 PA07U P r o d u c t I n n o v a t i o nF r o m PA07 • PA07A Contacting Cirrus Logic Support For all Apex Precision Power product questions and inquiries, call toll free 800-546-2739 in North America. For inquiries via email, please contact [email protected]. International customers can also request support by contacting their local Cirrus Logic Sales Representative. To find the one nearest to you, go to www.cirrus.com IMPORTANT NOTICE Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. 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