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| HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS PA15 * PA15A MICROTECHNOLOGY HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739 FEATURES * * * * * HIGH VOLTAGE -- 450V (225V) LOW COST LOW QUIESCENT CURRENT -- 3.0mA MAX HIGH OUTPUT CURRENT -- 200mA PROGRAMMABLE CURRENT LIMIT APPLICATIONS * * * * PIEZOELECTRIC POSITIONING HIGH VOLTAGE INSTRUMENTATION ELECTROSTATIC TRANSDUCERS PROGRAMMABLE POWER SUPPLIES UP TO 440V TYPICAL APPLICATION DESCRIPTION The PA15 is a high voltage, low quiescent current MOSFET operational amplifier designed as a low cost solution for driving continuous output currents up to 200mA and pulse currents up to 350mA into capacitive loads. The safe operating area (SOA) has no second breakdown limitations and can be observed for all type loads by choosing an appropriate current limiting resistor. The MOSFET input stage has integrated static and differential mode protection. The MOSFET output stage is biased AB for linear operation. External compensation provides flexibility in choosing bandwidth and slew rate for the application. The 10-pin power SIP package is electrically isolated. +VS RF R IN 1 6 PIEZO DRIVE PA15 10 V OUT COMPUTER FOCUS COMMAND VOLTAGE 2 5 7 R CL -V S EQUIVALENT SCHEMATIC 6 +VS R1 R2 C1 R3 LOW POWER, PIEZOELECTRIC POSITIONING Piezo positioning may be applied to the focusing of segmented mirror systems. The composite mirror may be composed of hundreds of elements, each requiring focusing under computer control. In such complex systems the PA15 reduces the costs of power supplies and cooling with its advantages of low cost and low quiescent power consumption while increasing circuit density with the SIP package. Q1 Q6 Q5 Q2 8 CC2 Q3 R4 Q4 ILIM 7 R7 Q11 10 OUT Q12 Q13 9 CC1 Q8 EXTERNAL CONNECTIONS 1 2 3 NC 4 NC 5 -VS 6 7 +VS I LIM PACKAGE: SIP 02 8 RC 9 C C2 C C1 10 OUT 1 -IN R5 R8 R9 R6 -IN 2 +IN Q15 R11 -VS 5 R12 Q14 R10 Q16 +IN CC RCL PHASE COMPENSATION GAIN 1 10 CC 33pf OPEN RCL = .6 ICL RC 1K OPEN APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com PA15 * PA15A ABSOLUTE MAXIMUM RATINGS SUPPLY VOLTAGE, +VS to -VS OUTPUT CURRENT, source, sink POWER DISSIPATION, continuous @ TC = 25C INPUT VOLTAGE, differential INPUT VOLTAGE, common mode TEMPERATURE, pin solder - 10s max TEMPERATURE, junction2 TEMPERATURE, storage OPERATING TEMPERATURE RANGE, case PA15 TEST CONDITIONS 1 MIN TYP ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS 450V See SOA 30W 25V VS 220C 150C -65 to +150C -55 to +125C PA15A SPECIFICATIONS PARAMETER INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE, vs. temperature OFFSET VOLTAGE, vs. supply OFFSET VOLTAGE, vs. time BIAS CURRENT, initial BIAS CURRENT, vs. supply OFFSET CURRENT, initial INPUT IMPEDANCE, DC INPUT CAPACITANCE COMMON MODE VOLTAGE RANGE3 COMMON MODE REJECTION, DC NOISE GAIN OPEN LOOP, @ 15Hz GAIN BANDWIDTH PRODUCT at 1MHz POWER BANDWIDTH PHASE MARGIN OUTPUT VOLTAGE SWING3 CURRENT, continuous SLEW RATE, AV = 100 CAPACITIVE LOAD, AV = +1 SETTLING TIME to .1% RESISTANCE, no load POWER SUPPLY VOLTAGE 5 CURRENT, quiescent, THERMAL RESISTANCE, AC, junction to case 4 RESISTANCE, DC, junction to case RESISTANCE, junction to air TEMPERATURE RANGE , Case NOTES: * 1. 2. 3. 4. 5. Full temperature range, F > 60Hz Full temperature range, F < 60Hz Full temperature range Meets full range specifications See note 5 50 IO = 200mA CC = OPEN Full temperature range CC = OPEN, 2V step RL = 2K, CC = OPEN RL = 2K, CC = OPEN RL = 2K, CC = OPEN Full temperature range 94 Full temperature range MAX MIN TYP MAX UNITS VCM = 90V 10KHz BW, RS = 1K, CC = OPEN VS -15 80 2 15 10 75 200 4 50 1011 4 98 2 111 5.8 24 60 10 50 50 2000 500 * * .5 5 * * * * 30 * * * * * * * * * 30 * * 3 20 * * 200 mV V/C V/V V/kh pA pA/V pA pF V dB Vrms dB MHz kHz V mA V/s pf s * VS-15 VS-10 200 20 100 2 50 150 2.0 225 3.0 2.5 4.2 30 -25 +85 * * 20 * * * * * * * * V mA C/W C/W C/W C * * * The specification of PA15A is identical to the specification for PA15 in applicable column to the left. Unless otherwise noted: TC = 25C, compensation = CC = 33pF, RC = 1K, RCL = 0. DC input specifications are value given. Power supply voltage is typical rating. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. +VS and -VS denote the positive and negative power supply rail respectively. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. Derate max supply rating .625 V/C below 25C case. No derating needed above 25C case. CAUTION The PA15 is constructed from MOSFET transistors. ESD handling procedures must be observed. The exposed substrate contains beryllia (BeO). Do not crush, machine, or subject to temperatures in excess of 850C to avoid generating toxic fumes. APEX MICROTECHNOLOGY CORPORATION * 5980 NORTH SHANNON ROAD * TUCSON, ARIZONA 85741 * USA * APPLICATIONS HOTLINE: 1 (800) 546-2739 TYPICAL PERFORMANCE GRAPHS PA15 * PA15A QUIESCENT CURRENT 2.8 500 OUTPUT STAGE INTERNAL POWER DISSIPATION, P(W) 40 32 24 16 8 0 0 POWER DERATING QUIESCENT CURRENT, I Q (mA) POWER RESPONSE OUTPUT VOLTAGE, VO (VPP ) CC 2.6 TC = 125C = Op en CC = CC = 2.4 TC = 85C 100 33 15 TC = 25C pf pf 2.2 TC = -55C 2.0 100 300 200 400 450 TOTAL SUPPLY VOLTAGE, VS (V) 25 50 75 100 125 150 CASE TEMPERATURE, TC (C) 20 2K 10K 100K 200K FREQUENCY, F (Hz) SMALL SIGNAL RESPONSE 120 50 SMALL SIGNAL RESPONSE 45 90 PHASE RESPONSE OPEN LOOP GAIN, A (dB) OPEN LOOP GAIN, A (dB) 100 80 60 C C = Open 40 20 0 -20 10 C C = 33pF 40 C C = 33pF PHASE, () 30 20 10 C C = 33pF 0 -10 100K C C = Open 135 C C = Open 180 225 270 100K 100 1K 10K .1M 1M FREQUENCY, F (Hz) 10M 1M FREQUENCY, F (Hz) 10M 1M FREQUENCY, F (Hz) 10M COMMON MODE REJECTION, CMR (dB) VOLTAGE DROP FROM SUPPLY, +VS - VO (V) VOLTAGE DROP FROM SUPPLY, +VS - VO (V) 10 SWING FROM +VS 85C 24 20 SWING FROM -VS OUTPUT IMPEDANCE, R() OPEN LOOP OUTPUT IMPEDANCE 400 350 300 250 200 150 100 50 0 10K 100K 1M FREQUENCY, F (Hz) 3M C C = Open 8 125C 85C 16 12 125C 6 -55C 8 4 0 0 40 80 120 160 LOAD CURRENT, I (mA) 200 -55C 4 25C 25C 2 0 40 80 120 160 LOAD CURRENT, I (mA) 200 .3 .1 R L = 1K CC = Open AV = 30 100 C C = Open 80 POWER SUPPLY REJECTION, PSR (dB) HARMONIC DISTORTION COMMON MODE REJECTION POWER SUPPLY REJECTION 120 100 80 60 40 20 0 1 10 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) DISTORTION, (%) 5 watt .01 50 mW 60 40 .001 30 100 1K 10K 30K FREQUENCY, F (Hz) 20 10 1K 10K .1M 100 FREQUENCY, F (Hz) 1M APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com PA15 * PA15A GENERAL Please read Application Note 1 "General Operating Considerations", which covers stability, supplies, heatsinking, mounting, current limit, SOA interpretation, and specification interpretation. Additional information can be found in other application notes. For information on the package outline, heatsinks, and mounting hardware, consult the "Accessory and Package Mechanical Data" section of the data book. OPERATING CONSIDERATIONS INPUT PROTECTION Although the PA15 can withstand differential input voltages up to 25V, additional external protection is recommended. In most applications 1N4148 or 1N914 signal diodes are sufficient (D1-D4 in Figure 2a). In more demanding applications where low leakage or low capacitance are of concern 2N4416 or 2N5457-2N5459 JFETs connected as diodes will be required (Q1-Q4 in Figure 2b). In either case the input differential voltage will be clamped to 1.4V. This is sufficient overdrive to produce maximum power bandwidth. CURRENT LIMIT For proper operation, the current limit resistor (RCL) must be connected as shown in the external connection diagram. The minimum value is 2 ohm, however for optimum reliability the resistor value should be set as high as possible. The value is calculated as follows; with the maximum practical value of 150 ohms. .6 RCL = ILIM POWER SUPPLY PROTECTION Unidirectional zener diode transient suppressors are recommended as protection on the supply pins. The zeners clamp transients to voltages within the power supply rating and also clamp power supply reversals to ground. Whether the zeners are used or not, the system power supply should be evaluated for transient performance including power-on overshoot and power-off polarity reversals as well as line regulation. Conditions which can cause open circuits or polarity reversals on either power supply rail should be avoided or protected against. Reversals or opens on the negative supply rail are known to induce input stage failure. Unidirectional transzorbs prevent this, and it is desirable that they be both electrically and physically as close to the amplifier as possible. SAFE OPERATING AREA (SOA) The MOSFET output stage of this power operational amplifier has two distinct limitations: 1. The current handling capability of the MOSFET geometry and the wire bonds. 2. The junction temperature of the output MOSFETs. NOTE: The output stage is protected against transient flyback. However, for protection against sustained, high energy flyback, external fast-recovery diodes should be used. Pulsed output currents may not reach 350 mA with VS - VO less than 25V. 500 OUTPUT CURRENT FROM +VS OR -VS, (mA) 300 200 DC STABILITY The PA15 has sufficient phase margin to be stable with most capacitive loads at a gain of 10 or more, using the recommended phase compensation. The PA15 is externally compensated and performance can be tailored to the ap+VS a. plication. Use the graphs of small sigZ1 nal response and power response as a 6 1 guide. The compen-IN sation capacitor CC D1 D2 PA15 must be rated at D3 D4 +IN 500V working volt2 5 age. An NPO capacitor is recommended. Z2 The compensation network CCRC must -VS be mounted closely b. +VS to the amplifier pins Z1 8 and 9 to avoid spurious oscillation. -IN Q1 Q3 +IN Q2 PA15 Q4 2 5 Z2 FIGURE 2. OVERVOLTAGE PROTECTION -VS 1 6 20 0m S DC ,T 10 0m S C = 100 DC ,T ,T 25 C C = 85 C 50 30 20 C = 12 5 C 10 25 PULSE CURVES @ 10% DUTY CYCLE MAX 50 75 100 125 250 500 SUPPLY TO OUTPUT DIFFERENTIAL, VS -VO (V) This data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. All specifications are subject to change without notice. PA15U REV. D MARCH 1999 (c) 1999 Apex Microtechnology Corp. |
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