HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS PA15 • PA15A HTTP://WWW.APEXMICROTECH.COM M I C R O T E C H N O L O G Y (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 RF 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. R1 R2 Q1 C1 8 CC2 Q8 R8 R9 R CL –V S 1 2 Q12 3 4 5 NC NC –VS PACKAGE: SIP 02 6 7 8 9 C C2 C C1 +VS I LIM 10 OUT RC Q13 –IN +IN CC Q14 2 +IN R10 RCL Q16 PHASE COMPENSATION Q15 R11 –VS 5 5 10 OUT R6 R5 7 2 EXTERNAL CONNECTIONS R7 Q11 1 –IN COMPUTER FOCUS COMMAND VOLTAGE V OUT ILIM 7 R4 9 CC1 Q5 10 PA15 Q4 Q3 Q6 PIEZO DRIVE 1 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. R3 Q2 6 R IN LOW POWER, PIEZOELECTRIC POSITIONING EQUIVALENT SCHEMATIC 6 +VS +VS R12 GAIN CC ≥1 ≥ 10 33pf OPEN RC 1KΩ OPEN RCL = .6 ICL APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected] ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS PA15 • PA15A SUPPLY VOLTAGE, +VS to –VS OUTPUT CURRENT, source, sink POWER DISSIPATION, continuous @ TC = 25°C INPUT VOLTAGE, differential INPUT VOLTAGE, common mode TEMPERATURE, pin solder - 10s max TEMPERATURE, junction2 TEMPERATURE, storage OPERATING TEMPERATURE RANGE, case ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS PA15A PA15 TEST CONDITIONS 1 PARAMETER 450V See SOA 30W ±25V ±VS 220°C 150°C –65 to +150°C –55 to +125°C MIN TYP MAX 2 15 10 75 200 4 50 1011 4 10 50 50 MIN TYP MAX UNITS .5 5 * * * * 30 * * 3 20 * * * mV µV/°C µV/V µV/√kh pA pA/V pA Ω pF V dB µVrms * * * * * dB MHz kHz ° * * 20 * * V mA V/µs pf µs Ω 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 Full temperature range VCM = ±90V 10KHz BW, RS = 1KΩ, CC = OPEN ±VS –15 80 2000 500 * * 98 2 * 200 GAIN OPEN LOOP, @ 15Hz GAIN BANDWIDTH PRODUCT at 1MHz POWER BANDWIDTH PHASE MARGIN RL = 2KΩ, CC = OPEN RL = 2KΩ, CC = OPEN RL = 2KΩ, CC = OPEN Full temperature range 94 111 5.8 24 60 OUTPUT VOLTAGE SWING3 CURRENT, continuous SLEW RATE, AV = 100 CAPACITIVE LOAD, AV = +1 SETTLING TIME to .1% RESISTANCE, no load IO = ±200mA CC = OPEN Full temperature range CC = OPEN, 2V step ±VS–15 ±VS–10 ±200 20 100 2 50 30 * * POWER SUPPLY VOLTAGE 5 CURRENT, quiescent, See note 5 ±50 ±150 2.0 ±225 3.0 * * * * * V mA * * °C/W °C/W °C/W °C 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. CAUTION Full temperature range, F > 60Hz Full temperature range, F < 60Hz Full temperature range Meets full range specifications 2.5 4.2 30 –25 * +85 * * The specification of PA15A is identical to the specification for PA15 in applicable column to the left. Unless otherwise noted: TC = 25°C, compensation = CC = 33pF, RC = 1KΩ, 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 25°C case. No derating needed above 25°C case. 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 850°C to avoid generating toxic fumes. APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 PA15 • PA15A OPEN LOOP GAIN, A (dB) 20 C C = 33pF 0 VOLTAGE DROP FROM SUPPLY, +VS – VO (V) –20 10 100 1K 10K .1M 1M FREQUENCY, F (Hz) 10M SWING FROM +VS 10 85°C 8 125°C 6 –55°C 4 25°C 2 0 40 80 120 160 LOAD CURRENT, I (mA) 200 HARMONIC DISTORTION R L = 1KΩ CC = Open AV = 30 5 watt .01 .001 30 90 PHASE, φ (°) C C = Open 20 10 C C = 33pF –10 100K 1M FREQUENCY, F (Hz) 50 mW 100 1K 10K 30K FREQUENCY, F (Hz) 135 C C = Open 180 270 100K 10M SWING FROM –VS 24 C C = 33pF 225 0 1M FREQUENCY, F (Hz) 10M OPEN LOOP OUTPUT IMPEDANCE 400 20 85°C 16 12 125°C 8 4 –55°C 25°C 0 0 40 80 120 160 LOAD CURRENT, I (mA) COMMON MODE REJECTION C C = Open 80 60 40 20 10 1K 10K .1M 100 FREQUENCY, F (Hz) 1M 350 C C = Open 300 250 200 150 100 50 0 10K 200 100 .3 .1 40 OUTPUT IMPEDANCE, R(Ω) 40 45 POWER SUPPLY REJECTION, PSR (dB) C C = Open 10K 100K 200K FREQUENCY, F (Hz) PHASE RESPONSE 50 30 COMMON MODE REJECTION, CMR (dB) VOLTAGE DROP FROM SUPPLY, +VS – VO (V) OPEN LOOP GAIN, A (dB) 60 OUTPUT VOLTAGE, VO (VPP ) SMALL SIGNAL RESPONSE en 80 Op 100 = SMALL SIGNAL RESPONSE 20 2K pf TC = -55°C 2.0 100 300 200 400 450 TOTAL SUPPLY VOLTAGE, VS (V) 25 50 75 100 125 150 CASE TEMPERATURE, TC (°C) 100 15 2.2 0 0 TC = 25°C = TC = 85°C pf 8 2.4 33 16 CC 24 TC = 125°C 2.6 CC 32 500 = QUIESCENT CURRENT, I Q (mA) 2.8 120 DISTORTION, (%) POWER RESPONSE QUIESCENT CURRENT POWER DERATING 40 CC OUTPUT STAGE INTERNAL POWER DISSIPATION, P(W) TYPICAL PERFORMANCE GRAPHS 100K 1M FREQUENCY, F (Hz) 3M POWER SUPPLY REJECTION 120 100 80 60 40 20 0 1 10 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected] OPERATING CONSIDERATIONS PA15 • PA15A GENERAL INPUT PROTECTION 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. 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 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. OUTPUT CURRENT FROM +VS OR –VS, (mA) 500 20 300 0m 10 S 200 0m S DC ,T C DC ,T 100 C 50 C 25 °C = 85 °C DC ,T = = 12 5° C 30 20 10 25 PULSE CURVES @ 10% DUTY CYCLE MAX 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. 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. 1 –IN 50 75 100 125 250 500 SUPPLY TO OUTPUT DIFFERENTIAL, VS –VO (V) 6 Q2 Q1 PA15 Q3 +IN Q4 2 5 Z2 FIGURE 2. OVERVOLTAGE PROTECTION –VS 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 © 1999 Apex Microtechnology Corp.