PA97DR PA97DR PA97DR Power Operational Amplifiers FEATURES DESCRIPTION * HIGH VOLTAGE -- 900V (450V) * LOW QUIESCENT CURRENT -- 600A * HIGH OUTPUT CURRENT -- 10mA APPLICATIONS * * * * MASS SPECTROMETERS SCANNING COILS HIGH VOLTAGE INSTRUMENTATION PROGRAMMABLE POWER SUPPLIES UP TO 880V * SEMICONDUCTOR MEASUREMENT EQUIPMENT The PA97DR is a high voltage MOSFET operational amplifier designed as a low cost solution for driving continuous output currents up to 10mA and pulse currents to 15mA into capacitive loads. The safe operating area (SOA) has no second breakdown limitations. The MOSFET output stage is biased class C for low quiescent current operation. External compensation provides flexibility in choosing bandwidth and slew rate for the application. Apex Microtechnology's SIP05 package uses a minimum of board space allowing for high density circuit boards. EQUIVALENT SCHEMATIC 12 +VS R1 C1 R2 Q1 Q3 Q2 Q6 4 CC1 Q5 Q10A 1 -IN Q4 6 CC2 OUT 8 R10 2 +IN R9 R14 Q14 www.apexanalog.com PA97DRU R5 Q10B R7 R8 -VS 10 R4 R16 Q12 Q15 R18 Copyright (c) Apex Microtechnology, Inc. 2012 (All Rights Reserved) OCT 2012 1 PA97U REVI PA97DR CHARACTERISTICS AND SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS Parameter Symbol Min Max Units SUPPLY VOLTAGE, +VS to -VS 900 V OUTPUT CURRENT, source, sink, within SOA 15 mA POWER DISSIPATION,continuous @ TC = 25C 5 W INPUT VOLTAGE, differential (Note 3) -20 20 V INPUT VOLTAGE, common mode (See Text) -VS VS V 220 C TEMPERATURE, pin solder, 10s max. TEMPERATURE, junction (Note 2) 150 C TEMPERATURE RANGE, storage -65 150 C OPERATING TEMPERATURE, case -55 125 C SPECIFICATIONS Parameter Test Conditions Min Typ Max Units 0.5 5 mV 10 50 V/C OFFSET VOLTAGE vs. supply 10 25 OFFSET VOLTAGE vs. time 75 BIAS CURRENT, initial 200 INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE vs. temperature Full temperature range BIAS CURRENT vs. supply 4 OFFSET CURRENT, initial 50 INPUT IMPEDANCE, DC 10 INPUT CAPACITANCE 11 4 COMMON MODE VOLTAGE RANGE V =250V (Note 3) S COMMON MODE REJECTION, DC VCM = 90V NOISE 10KHz BW, RS = 1K, CC = 10pF VS 30 80 V/V V/kHz 2000 pA pA/V 500 pA pF V 98 dB 2 VRMS 111 dB GAIN OPEN LOOP @ 15Hz RL = 5K, CC = 10pF 94 GAIN BANDWIDTH PRODUCT @ 1MHz RL = 5K, CC = 10pF 1 MHz POWER BANDWIDTH RL = 5K, CC = 10pF 2 kHz PHASE MARGIN, AV = 100 Full temperature range 60 VS 20 V OUTPUT VOLTAGE SWING (Note 3) IO = 10mA CURRENT, continuous VS 24 10 mA SLEW RATE, AV = 100 CC = 10pF 8 V/S SETTLING TIME, to 0.1% CC = 10pF, 2V step 2 S RESISTANCE 10mA Load 100 2 PA97DRU PA97DR Parameter Test Conditions Min Typ Max Units 50 300 450 V 0.6 1 mA 20 C/W 25 C/W POWER SUPPLY VOLTAGE (Note 5) CURRENT, quiescent, amplifier only THERMAL RESISTANCE, AC, junction to case (Note 4) Full temp range, F > 60Hz RESISTANCE, DC, junction to case Full temp range, F < 60Hz RESISTANCE, junction to air Full temp range 40 TEMPERATURE RANGE, case -25 C/W +85 C NOTES: 1. Unless otherwise noted: TC = 25C, DC input specifications are value given. Power supply voltage is typical rating. CC = 10pF. 2. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. 3. Although supply voltages can range up to 450V the input pins cannot swing over this range. The input pins must be at least 30V from either supply rail but not more than 500V from either supply rail. See text for a more complete description of the common mode voltage range. 4. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. 5. Derate max supply rating .625 V/C below 25C case. No derating needed above 25C case. 1 -200 0 25 50 75 100 125 150 TEMPERATURE, T (C) SMALL SIGNAL RESPONSE 120 100 C 80 C = 10 pF 60 40 20 0 1 M +VS OR -VS, (mA) -180 20 10 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) SAFE OPERATING AREA PA97DRU 10 DC DC ,T C 0 S =2 5 -220 .6M 14 1M 2M FREQUENCY, F (Hz) 3M OUTPUT VOLTAGE SWING SWING FROM +VS 13 12 11 10 SWING FROM -VS 9 0 2 4 6 8 10 OUTPUT CURRENT, IO (mA) 1.08 QUIESCENT CURRENT 1.04 1.00 0.96 0.92 0.88 100 200 300 400 500 600 700 800 900 TOTAL SUPPLY VOLTAGE, VS (V) 1K OUTPUT VOLTAGE, VO (VP-P) PHASE, () T = TA 2 -160 NORMALIZED QUIESCENT CURRENT, I (X) -140 T = TC 3 10 8 -120 POWER RESPONSE 500 200 CC = 10pF 100 50 1K , VN (nV/Hz) 4 0 PHASE RESPONSE POWER DERATING 5 140 OPEN LOOP GAIN, A (dB) The PA97DR is constructed from MOSFET transistors. ESD handling procedures must be observed. VOLTAGE DROP FROM SUPPLY, VS - VO (V) INTERNAL POWER DISSIPATION, P(W) CAUTION 20 15 10 10K FREQUENCY, F (Hz) 30K INPUT NOISE 3 = C 10 pF 60 40 PA97DR 20 20 10 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) 12 11 10 SWING FROM -VS 9 0 2 4 6 8 10 OUTPUT CURRENT, IO (mA) SAFE OPERATING AREA 10 8 6 5 4 3 0 C DC ,T C =1 25 50 1K 10K FREQUENCY, F (Hz) 30K INPUT NOISE 15 S DC =2 5 ,T C C= 85 C ,T 100 20 10 DC CC = 10pF 200 INPUT NOISE VOLTAGE, VN (nV/Hz) OUTPUT CURRENT FROM +VS OR -VS, (mA) 0 1 OUTPUT VOLTAGE, C 80 VOLTAGE DROP FROM SUPP OPEN LOOP GAIN, 100 10 C 2 CC =10pF 1 200 300 400 600 100 1000 SUPPLY TO OUTPUT DIFFERENTIAL, VS -VO (V) 7 5 3 2 10 100 1K 10K FREQUENCY, F (Hz) 1M EXTERNAL CONNECTIONS -IN +IN CC1 CC2 OUT -Vs +Vs 1 2 4 6 8 10 12 * * CC* PATENTED * 0.01F or greater ceramic power supply bypassing required. CC = 10pF minimum, 1kV NPO (COG). 7-pin SIP PACKAGE STYLE DR PHASE COMPENSATION GAIN CC 10 10pF TYPICAL APPLICATION RF 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 PA97DR 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. +VS R IN 1 12 PIEZO DRIVE PA97DR 2 COMPUTER FOCUS COMMAND VOLTAGE 8 6 V OUT 4 10 CC -V S GENERAL Please read the "General Operating Considerations" section, which covers stability, supplies, heatsinking, mounting, current limit, SOA interpretation, and specification interpretation. Additional information can be found in the application notes. For information on the package outline, heatsinks, and mounting hardware, consult the "Accessory and Package Mechanical Data" section of the handbook. CURRENT LIMIT The PA97DR has no provision for current limiting the output. 4 PA97DRU PA97DR COMMON MODE INPUT RANGE Operational amplifiers are usually designed to have a common mode input voltage range that approximates the power supply voltage range. However, to keep the cost as low as possible and still meet the requirements of most applications the common mode input voltage range of the PA97DR is restricted. The input pins must always be a least 30V from either supply voltage but never more than 500V. This means that the PA97 cannot be used in applications where the supply voltages are extremely unbalanced. For example, supply voltages of +800V and -100V would not be allowed in an application where the non-inverting pin is grounded because in normal operation both input pins would be at 0V and the difference voltage between the positive supply and the input pins would be 800V. In this kind of application, however, supply voltages +500V and -100V does meet the input common mode voltage range requirements since the maximum difference voltage between the inputs pins and the supply voltage is 500V (the maximum allowed). The output has no such restrictions on its voltage swing. The output can swing within 24V of either supply voltage regardless of value so long as the total supply voltage does not exceed 900V. INPUT PROTECTION Although the PA97DR can withstand differential input voltages up to 20V, additional external protection is recommended. In most applications 1N4148 or 1N914 signal diodes are sufficient (D1, D2 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, Q2 in Figure 2b). In either case the input differential voltage will be clamped to .7V. This is sufficient overdrive to produce maximum power bandwidth. Note that this protection does not automatically protect the amplifier from excessive common mode input voltages. 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 A. evaluated for transient performance including power-on overshoot and power-off polarity reversal 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 is 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. EXTERNAL COMPONENTS The compensation capacitor Cc must be rated for the total supply voltage. 10pF NPO (COG)capacitor rated at 1kV is recommended. Of equal importance is the voltage rating and voltage coefficient of the gain setting feedback resistor. Typical voltage ratings of low wattage resistors are 150 to 250V. Up to 900 V can appear across the feedback resistor. High voltage rated resistors can be obtained. However a 1 megohm feedback resistor composed of five 200k resistors in series will produce the proper voltage rating. CAUTIONS +VS Z1 1 -IN D1 +IN D2 2 12 PA97DR 10 Z2 -VS B. +VS Z1 1 -IN Q1 +IN Q2 2 12 PA97DR 10 Z2 -VS FIGURE 2. The operating voltages of the PA97DR are potentially lethal. During circuit design develop a functioning circuit at the lowest possible voltages. Clip test leads should be used for "hands off" measurements while troubleshooting. With no internal current limit, proper choice of load impedance and supply voltage is required to meed SOA limitiations. An output short circuit will destroy the amplifier within milliseconds. STABILITY The PA97DR is stable at gains of 10 or more with a NPO (COG) compensation capacitor of 10pF. The compensation capacitor, Cc, in the external connections diagram must be rated at 1000V working voltage and mounted closely to pins 4 and 6 to prevent spurious oscillation. A compensation capacitor less than 10pF is not recommended. PA97DRU 5 PA97DR NEED TECHNICAL HELP? CONTACT APEX SUPPORT! For all Apex Microtechnology product questions and inquiries, call toll free 800-546-2739 in North America. For inquiries via email, please contact apex.support@apexanalog.com. International customers can also request support by contacting their local Apex Microtechnology Sales Representative. To find the one nearest to you, go to www.apexanalog.com IMPORTANT NOTICE Apex Microtechnology, Inc. has made every effort to insure the accuracy of the content contained in this document. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (expressed or implied). Apex Microtechnology reserves the right to make changes without further notice to any specifications or products mentioned herein to improve reliability. This document is the property of Apex Microtechnology and by furnishing this information, Apex Microtechnology grants no license, expressed or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual property rights. Apex Microtechnology owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Apex Microtechnology integrated circuits or other products of Apex Microtechnology. This consent does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale. APEX MICROTECHNOLOGY PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN PRODUCTS USED FOR LIFE SUPPORT, AUTOMOTIVE SAFETY, SECURITY DEVICES, OR OTHER CRITICAL APPLICATIONS. PRODUCTS IN SUCH APPLICATIONS ARE UNDERSTOOD TO BE FULLY AT THE CUSTOMER OR THE CUSTOMER'S RISK. Apex Microtechnology, Apex and Apex Precision Power are trademarks of Apex Microtechnolgy, Inc. All other corporate names noted herein may be trademarks of their respective holders. www.apexanalog.com 6 Copyright (c) Apex Microtechnology, Inc. 2012 (All Rights Reserved) OCT 2012 PA97DRU PA97U REVI