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| FET INPUT POWER OPERATIONAL AMPLIFIERS PA07 * PA07A MICROTECHNOLOGY HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739 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 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 +32V CF R CL+ .68 PA07 V = 28 EMF = 14V R W = 14 MOTOR DESCRIPTION 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". +V R CL- .68 LIGHT -32V -V PD1 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. EQUIVALENT SCHEMATIC 3 7 Q1 Q5 Q8 Q9 C3 5 4 Q12A Q15 Q18 D2 6 Q12B Q10 C4 D3 Q17A Q16 C2 Q7 1 Q11 Q19 8 Q17B Q2 D1 Q4 Q3 C1 Q6A Q6B 2 EXTERNAL CONNECTIONS +VS 3 CL+ 2 1 R CL+ OUT OUTPUT RT +IN 4 TOP VIEW RS -IN 5 6 7 8 CL- R CL- -VS BAL RS= ( VS+ + -VS ) RT/1.6 NOTE: Input offset voltage trim optional. RT = 10K MAX 8-pin TO-3 package APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com PA07 * PA07A 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 PA07 TEST CONDITIONS 2 ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS 100V 5A 67W 50V VS 300C 200C -65 to +150C -55 to +125C PA07A MAX MIN TYP MAX UNITS SPECIFICATIONS PARAMETER 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 GAIN OPEN LOOP GAIN at 10Hz TC = 25C, RL = 15 GAIN BANDWIDTH PRODUCT @ 1MHz TC = 25C, RL = 15 POWER BANDWIDTH TC = 25C, RL = 15 PHASE MARGIN Full temperature range, RL = 15 OUTPUT VOLTAGE SWING4 VOLTAGE SWING4 VOLTAGE SWING4 CURRENT, peak SETTLING TIME to .1% SLEW RATE CAPACITIVE LOAD, unity gain CAPACITIVE LOAD, gain>4 POWER SUPPLY VOLTAGE CURRENT, quiescent THERMAL RESISTANCE, AC, junction to case5 RESISTANCE, DC, junction to case RESISTANCE, junction to air TEMPERATURE RANGE, case NOTES: * 1. 2. 3. 4. 5. F>60Hz F<60Hz Meets full range specifications -25 Full temperature range TC = 25C 12 Full temp. range, IO = 5A Full temp. range, IO = 2A Full temp. range, IO = 90mA TC = 25C TC = 25C, 2V step TC = 25C Full temperature range Full temperature range VS-5 VS-5 VS-5 5 92 TC = 25C Full temperature range TC = 25C Full temperature range TC = 25C TC = 25C TC = 25C TC = 25C TC = 25C Full temperature range VS-10 Full temperature range, VCM = 20V MIN TYP .5 10 8 20 5 .01 2.5 1011 4 120 2 30 50 50 * .25 5 * 10 3 * 1.5 * * * .5 10 10 10 mV V/C V/V V/W pA pA/V pA pF V dB 98 1.3 18 70 * * * * * dB MHz kHz * * * * 1.5 5 10 SOA * * * * V V V A s V/s nF 35 18 50 30 * * * * * V mA 1.9 2.4 30 25 2.1 2.6 +85 * * * * * * * * C/W C/W C/W C The specification of PA07A is identical to the specification for PA07 in applicable column to the left. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. The power supply voltage for all specifications is the TYP rating unless otherwise noted as a test condition. Doubles for every 10C of temperature increase. +VS and -VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to -VS. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. 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 850C to avoid generating toxic fumes. CAUTION APEX MICROTECHNOLOGY CORPORATION * 5980 NORTH SHANNON ROAD * TUCSON, ARIZONA 85741 * USA * APPLICATIONS HOTLINE: 1 (800) 546-2739 TYPICAL PERFORMANCE GRAPHS PA07 * PA07A NORMALIZED BIAS CURRENT, I B (X) 256 64 16 4 1 .25 .06 -15 INTERNAL POWER DISSIPATION, P(W) 70 60 POWER DERATING BIAS CURRENT 3.0 2.5 2.0 1.5 1.0 .5 CURRENT LIMIT T = TC 50 40 30 20 10 0 0 20 40 60 80 100 120 140 TEMPERATURE, TC (C) T = TA CURRENT LIMIT, I LIM (A) R CL = 0.3 R CL = 0.6 25 5 45 65 85 TEMPERATURE, T C (C) 105 0 0 25 75 100 -50 -25 50 CASE TEMPERATURE, TC (C) 120 SMALL SIGNAL RESPONSE 0 -30 -60 PHASE RESPONSE 100 POWER RESPONSE OUTPUT VOLTAGE, VO (VPP ) 68 46 32 22 15 10 6.8 4.6 10K 20K 30K 50K 70K .1M FREQUENCY, F (Hz) |+VS | + |-VS | = 100V |+VS | + |-VS | = 70V OPEN LOOP GAIN, A OL (dB) 100 80 60 40 20 0 1 10 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) PHASE, () -90 -120 -150 -180 -210 1 10 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) -20 COMMON MODE REJECTION, CMR (dB) 120 100 80 60 40 20 0 INPUT NOISE VOLTAGE, VN (nV/ Hz) COMMON MODE REJECTION 8 PULSE RESPONSE OUTPUT VOLTAGE, VO (VPP ) 6 4 2 0 -2 -4 -6 -8 0 2 46 8 10 12 TIME, t (s) VIN = 5V, t r = 100ns 20 INPUT NOISE 10 6 4 1 10 100 1K 10K .1M FREQUENCY, F (Hz) 1M 2 10 100 10K 1K FREQUENCY, F (Hz) .1M VOLTAGE DROP FROM SUPPLY, VSAT (V) 10 HARMONIC DISTORTION G =10 NORMALIZED QUIESCENT CURRENT, I Q (X) QUIESCENT CURRENT 1.6 1.4 1.2 1.0 .8 .6 T C = 25C T C = -25C OUTPUT VOLTAGE SWING 6 5 DISTORTION, THD (%) 3 4 ,R L W ,R = 1 .3 O 8 TC= 4 3 2 1 0 0 8 C -25 25C TC = = 5V L = 50 m 2 = 3 6V ,R L .1 = 60 W ,V 50 TC = 85C 85C TC = ,V W = S P S = .03 .01 100 P O C T C = 125 P O = 300 1K 3K 10K 30K .1M FREQUENCY, F (Hz) .4 50 60 70 80 90 100 40 TOTAL SUPPLY VOLTAGE, VS (V) 2 3 4 1 5 OUTPUT CURRENT, I O (A) 6 APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com PA07 * PA07A 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.apexmicrotech.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit; heat sink selection; Apex's complete Application Notes library; Technical Seminar Workbook; and Evaluation Kits. OPERATING CONSIDERATIONS 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 = 85C: VS 50V 40V 30V 20V 15V SHORT TO VS C, L, OR EMF LOAD .21A .3A .46A .87A 1.4A SHORT TO COMMON .61A .87A 1.4A 2.5A 4.0A 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. 5.0 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. OUTPUT CURRENT FROM +VS OR - VS (A) 4.0 3.0 2.0 1.5 1.0 .8 .6 .4 .3 Tc =8 5C 25 ste ad Tc ys t= ta te SE 5m TH =1 s ER C t= t= 1m 0 . 5 s ms BR THERMAL SHUTDOWN PROTECTION The thermal protection circuit shuts off the amplifier when the substrate temperature exceeds approximately 150C. 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 = 25C 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. MA CO L ND EA KD OW N .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. PA07U REV. L FEBRUARY 2001 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 .12, 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. 1 Note 1. Power Design is a self-extracting Excel spreadsheet available free from www.apexmicrotech.com This data sheet has been carefully CORPORATION * 5980 NORTH SHANNON ROAD assumed for possible inaccuracies * USA * APPLICATIONS HOTLINE: 1 (800) 546-2739 APEX MICROTECHNOLOGY checked and is believed to be reliable, however, no responsibility*isTUCSON, ARIZONA 85741 or omissions. All specifications are subject to change without notice. (c) 2001 Apex Microtechnology Corp. |
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