PA97DR

PA97 RoHS Power Operational Amplifiers COMPLIANT FEATURES • • • High Voltage — 900V (±450V) Low Quiescent Current — 600µA High Output Current — 10mA APPLICATIONS • • • • • Mass Spectrometers Scanning Coils High Voltage Instrumentation Programmable Power Supplies up to 880V Semiconductor Measurement Equipment DESCRIPTION The PA97 is a high voltage MOSFET operational amplifier designed as a low cost solution for driving con‐ tinuous 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 quies‐ cent current operation. External compensation provides flexibility in choosing bandwidth and slew rate for the application. Apex Microtechnology’s 7‐pin SIP package uses a minimum of board space allowing for high density circuit boards. Figure 1: Equivalent Schematic 12 +VS R1 C1 R2 Q1 R4 Q3 Q2 R5 Q4 Q6 Q5 Q10A 4 CC1 Q10B 1 –IN R7 2 +IN R9 R14 Q14 www.apexanalog.com OUT 8 R10 R8 –VS 10 6 CC2 R16 Q12 Q15 R18 © Apex Microtechnology Inc. All rights reserved Nov 2018 PA97U Rev J PA97 TYPICAL CONNECTION Figure 2: Typical Connection 2 PA97U Rev J PA97 PINOUT AND DESCRIPTION TABLE Figure 3: External Connections * * * 0.01µF or greater ceramic power supply bypassing required. CC = 10pF minimum, 1kV NPO (COG). Pin Number Name Description 1 ‐IN The inverting input. 2 +IN The non‐inverting input. 4,6 CC Compensation capacitor connection. Select value based on Phase Compensation. See applicable section. 8 OUT The output. Connect this pin to load and to the feedback resistors. 10 ‐VS The negative supply rail. 12 +VS The positive supply rail. PA97U Rev J 3 PA97 SPECIFICATIONS Unless otherwise noted: TC = 25°C, DC input specifications are ± value given. Power supply voltage is typical rating. CC = 10pF. ABSOLUTE MAXIMUM RATINGS Parameter Supply Voltage, +Vs To ‐Vs Output Current, source, sink, peak, within SOA Power Dissipation, continuous @ Tc = 25°C Input Voltage, differential 1 Input Voltage, common mode (See Text) Symbol Min Max Units +Vs to ‐Vs 900 V IOUT 15 mA PD 5 W VIN (Diff) ‐20 20 V VCM ‐VS VS V 220 °C 150 °C ‐65 150 °C ‐55 125 °C Temperature, pin solder, 10s max. Temperature, junction 2 TJ Temperature Range, storage Operating Temperature, case TC 1. 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. 2. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dis‐ sipation to achieve high MTTF. CAUTION 4 The PA97 is constructed from MOSFET devices. ESD handling procedures must be observed. PA97U Rev J PA97 INPUT Parameter Test Conditions Min Offset Voltage, initial Typ Max Units 0.5 5 mV 10 50 µV/°C Offset Voltage vs. Supply 10 25 µV/V Offset Voltage vs. Time 75 Bias Current, initial 200 Offset Voltage vs. Temperature Full temp range Bias Current vs. Supply 4 Offset Current, initial 50 Input Impedance, DC 10 Input Capacitance µV/kh 2000 500 11 VS= ±250V ±VS Ŧ 30 Common Mode Rejection, DC VCM = ±90V 80 Noise 100 kHz BW, RS = 1 kΩ, CC = 10pF pA Ω 4 Common Mode Voltage Range 1 pA pA/V pF V 98 dB 2 µVRMS 1. 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. GAIN Parameter Min Typ 94 111 dB Gain Bandwidth Product @ 1 MHz RL = 5 kΩ, CC = 10pF 1 MHz Power Bandwidth RL = 5 kΩ, CC = 10pF 2 kHz Phase Margin, AV = 100 Full temp range 60 ° Open Loop @ 15 Hz Test Conditions RL = 5 kΩ, CC = 10pF Max Units OUTPUT Parameter Voltage Swing Test Conditions IOUT = 10mA Current, continuous Min Typ ±VS Ŧ 24 ±VS Ŧ 20 10 Max Units V mA Slew Rate, AV = 100 CC = 10pF 8 V/µs Settling Time, to 0.1% CC = 10pF, 2V step 2 µs Resistance 10mA Load 100 Ω PA97U Rev J 5 PA97 POWER SUPPLY Parameter Test Conditions Voltage 1 Min Typ Max ±50 ±300 ±450 V 0.6 1 mA Max Units Current, quiescent, amplifier only Units 1. Derate max supply rating 0.625 V/°C below 25°C case. No derating needed above 25°C case. THERMAL Parameter Test Conditions Min Typ Resistance, AC, junction to case 1 Full temp range, F > 60 Hz 20 °C/W Resistance, DC, junction to case Full temp range, F < 60 Hz 25 °C/W Resistance, junction to air Full temp range Temperature Range, case 40 ‐25 °C/W +85 °C 1. Rating applies if the output current alternates between both output transistors at a rate faster than 60 Hz. 6 PA97U Rev J PA97 TYPICAL PERFORMANCE GRAPHS Figure 4: Power Derating Figure 5: Phase Response -120 T = TC 4 -140 Phase, ˇ;Σ) /ŶƚĞƌŶĂůWŽǁĞƌŝƐƐŝƉĂƟŽŶ͕W;tͿ 5 3 T = TA 2 1 -160 -180 -200 0 0 25 50 75 100 125 -220 0.6M 150 1M Case Temperature, TC (°C) 3M Frequency, F (Hz) Figure 6: Quiescent Current Figure 7: Small Signal Response 1.08 140 120 1.04 Open Loop Gain, A (dB) Normalized Quiescent Current, I (X) 2M 1.00 0.96 0.92 100 C 80 C =1 0p F 60 40 20 0.88 100 200 300 400 500 600 700 800 900 Total Supply Voltage, VS (V) PA97U Rev J 0 1 10 100 1k 10k 0.1M 1M 10M Frequency, F (Hz) 7 PA97 Figure 8: Output Voltage Swing Figure 9: Power Response 1k SWING FROM +VS Output Voltage, VOUT (VP-P) Voltage Drop From Supply, VS-VOUT (V) 14 13 12 11 10 500 CC = 10pF 200 100 SWING FROM -VS 9 0 2 4 6 8 10 50 1k 10k 30k Frequency, F (Hz) Output Current, IOUT (mA) Figure 10: Input Noise Input Noise Voltage, VN ;Ŷsͬя,njͿ 20 15 10 7 5 3 2 10 100 1k 10k 100k Frequency, F (Hz) 8 PA97U Rev J PA97 SAFE OPERATING AREA (SOA) Figure 11: SOA KƵƚƉƵƚƵƌƌĞŶƚ&ƌŽŵнVSŽƌͲVS;ŵA) 20 10 0μ s  ͕d  C =25° C ͕d C =8 5° C 10 8 6 5 4  ͕d = C 12 5° 3 C 2 CC сϭϬƉ& 1 100 200 300 400 600 1000 ^ƵƉƉůLJƚŽKƵƚƉƵƚŝīĞƌĞŶƟĂů͕VS-VOUT (V) PA97U Rev J 9 PA97 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.apexana‐ log.com for Apex Microtechnology’s complete Application Notes library, Technical Seminar Workbook, and Evaluation Kits. TYPICAL APPLICATION 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 com‐ plex systems the PA97 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. Figure 12: Typical Application PHASE COMPENSATION Gain CC ≥10 10pF CURRENT LIMIT The PA97 has no provision for current limiting the output. 10 PA97U Rev J PA97 COMMON MODE INPUT RANGE Operational amplifiers are usually designed to have a common mode input voltage range that approxi‐ mates 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 PA97 is restricted. The input pins must always be at 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, sup‐ ply 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 differ‐ ence 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 PA97 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 13a). 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 13b). 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. Figure 13: Input Protection PA97U Rev J 11 PA97 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 per‐ formance 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 900V can appear across the feedback resistor. High voltage rated resistors can be obtained. However a 1 MΩ feedback resistor composed of five 200 kΩ resistors in series will produce the proper voltage rating. CAUTIONS The operating voltages of the PA97 are potentially lethal. During circuit design develop a functioning cir‐ cuit at the lowest possible voltages. Clip test leads should be used for “hands off” measurements while trou‐ bleshooting. With no internal current limit, proper choice of load impedance and supply voltage is required to meet SOA limitations. An output short circuit will destroy the amplifier within milliseconds. STABILITY The PA97 is stable at gains of 10 or more with a NPO (COG) compensation capacitor of 10pF. The com‐ pensation 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. 12 PA97U Rev J PA97 PACKAGE OPTIONS Part Number Apex Package Style Description PA97PC PC 7‐Pin SIP PA97DR DR Not recommended for new design PACKAGE STYLE PC NOTES: 1. 2. 3. 4. 5. 6. Dimensions are inches & [mm]. Triangle printed on lid denotes pin 1. Pins: Alloy 510 phosphor bronze plated with matte tin (150 - 300μ") over nickel (50 μ" max.) underplate. Package Material: Alumina substrate with plastic lid. Package weight: 2.4 grams. Epoxy sealed, non-hermetic package. 7. Drawing scale is 2X. .18 [4.4] MAX. .475 [12.07] .010 [0.25] TYP. 1.200 [30.48] .590 [14.99] .100 [2.54] TYP. PA97U Rev J .84 [21.3] .21 [5.3] .020 [0.51] TYP. .200 [5.08] TYP. 13 PA97 PACKAGE STYLE DR Note: Package is not recommended for new designs Notes: 1. Dimensions are inches and [mm] 2. Triangle printed on lid denotes pin 1 ϯ͘WŝŶƐ͗ůůŽLJϱϭϬƉŚŽƐƉŚŽƌďƌŽŶnjĞƉůĂƚĞĚǁŝƚŚŵĂƩĞƟŶ;ϭϱϬͲϯϬϬʅ͟ͿŽǀĞƌŶŝĐŚĞů;ϱϬʅ” max) underplate ϰ͘WĂĐŬĂŐĞŵĂƚĞƌŝĂů͗ůƵŵŝŶĂƐƵďƐƚƌĂƚĞǁŝƚŚƉůĂƐƟĐůŝĚ 5. Package weight: .11 oz [3.0 g] ϲ͘ƉŽdžLJƐĞĂůĞĚ͕ŶŽŶͲŚĞƌŵĞƟĐƉĂĐŬĂŐĞ 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 Microtechnology, Inc. All other corporate names noted herein may be trademarks of their respective holders. 14 PA97U Rev J