PA99

PA99 • PA99A RoHS Power Operational Amplifier COMPLIANT FEATURES • • • • • • Up to 2400VP-P Output Wide Supply Range - ±100V to ±1250V Programmable Current Limit 50mA Continuous Output Hermetically Sealed Package Temperature Sensor APPLICATIONS • • • • Semiconductor Testing Piezo Positioning High Voltage Instrumentation Electrostatic Deflection DESCRIPTION The PA99 is an ultra-high 2,500 V power operational amplifier designed for output currents up to 50mA to target high voltage applications including piezoelectric positioning, instrumentation, semiconductor production testing, and electrostatic deflection. Output voltages can swing up to 2,400 VP-P. High accuracy for this MOSFET power amplifier is achieved with a cascode input circuit configuration. External compensation provides user flexibility by allowing customers to tailor slew rate and bandwidth performance. A resistor configurable current limit provides system level protection. TYPICAL CONNECTION Figure 1: Typical Connection RF +V S 100nF CC RIN RCL+ +V S + TEMPA DMM CC PA99 TEMPB V OUT +CL OUT -CL -V S RCL- RL 100nF -V S www.apexanalog.com © Apex Microtechnology Inc. All rights reserved FEB 2018 PA99U Rev D PA99 • PA99A PINOUT AND DESCRIPTION TABLE Figure 2: External Connections Pin Number 2 Name Description 1, 2 NC No connection. 3 -CL Connect a negative current limit resistor between this pin and -Vs pin. 4 -Vs The negative supply rail. 5 CC Connect a compensation capacitor between this pin and +CL pin. The compensation capacitor needs to be rated for at least the maximum supply voltage. 6 +CL Connect a positive current limit resistor between this pin and the OUT pin. Output current flows out of this pin through RCL+. 7 OUT The output. Connect this pin to load and to the feedback resistors. 8 TEMPA The anode for the temperature sensing diode. 9 TEMPB The cathode for the temperature sensing diode. 10 +Vs The positive supply rail. 11 -IN The inverting input. 12 +IN The non-inverting input. PA99U Rev D PA99 • PA99A SPECIFICATIONS Unless noted otherwise, the test conditions are as follows: TC = 25°C, VS = 2000V, RL = 50 kΩ, AV = 100, RF = 200 kΩ, CC=15pF. DC input specifications are value given. The power supply voltage is typical rating. ABSOLUTE MAXIMUM RATINGS Parameter PA99 & PA99A Min Symbol Supply Voltage Unit Max +Vs to -Vs 2500 V Output Current, Peak, within SOA IO ±70 mA Power Dissipation, internal, DC PD W Input Voltage, common mode Vcm 37 -VS+50 to +VS-50 VIN (Diff) ±20 V +225 °C Temperature, junction Temperature, storage TJ +150 °C -40 +150 °C Operating Temperature Range, case TC -40 +85 °C Input Voltage, differential Temperature, pin solder, 10s 1 V 1. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. INPUT Parameter Test Conditions Min Offset Voltage, initial Offset Voltage vs. temperature PA99 Typ Max 2.0 5.0 2.0 mV 75 50 µV/°C Full temp range Offset Voltage vs. supply 0.1 Bias Current, Initial1 Min PA99A Typ Max * Unit µV/V 50 * pA Bias Current vs. supply 0.01 * pA/V Offset Current, Initial 5.0 Input Resistance, DC 1011 * Ω 13 -Vs + 50 +Vs - 50 134 * pF * V * dB 2 * µV RMS Input Capacitance Common Mode Voltage Range Common Mode Rejection, DC Input Noise 20 kHz BW, RS=10 kΩ 50 * * pA 1. Doubles for every 10°C of case temperature increase. PA99U Rev D 3 PA99 • PA99A GAIN Parameter Test Conditions Min Open Loop, @ 15 Hz Gain Bandwidth Product Power Bandwidth AV=100, 280 kHz VO = 2000V, VS = 2200V 1.6 Phase Margin PA99 Typ Max Min PA99A Typ Max Unit 117 * dB 28 * MHz * kHz 5 * 60 * ° Harmonic Distortion, HD2 1 kHz 61 * dB Harmonic Distortion, HD3 1 kHz 56 * dB PA99 Typ PA99A Typ OUTPUT Parameter Test Conditions Min Max Min Max Unit Voltage Swing, negative rail I O = 20mA -Vs+20 * V Voltage Swing, positive rail I O = 20mA +Vs-20 * V Current, continuous Within SOA ±50 * mA Slew Rate, rising 10 30 * * V/µs Slew Rate, falling 10 30 * * V/µs Resistive Load 1000 * Ω POWER SUPPLY Parameter Test Conditions Voltage Min PA99 Typ ±100 Current, quiescent Max Min ±1250 * 4.0 PA99A Typ Max * * Unit V mA THERMAL Parameter Resistance, DC, junction to case Resistance, junction to air Test Conditions Full temp range, F < 60 Hz Full temp range Min PA99 Typ Max Min PA99A Typ Max Unit 3.3 * °C/W 15.4 * °C/W Note: An asterisk (*) in a specification column of PA99A indicates that the value is identical to the specification for the PA99 in the applicable column to the left 4 PA99U Rev D PA99 • PA99A TYPICAL PERFORMANCE GRAPHS Figure 3: Power Derating Figure 4: Large Signal Pulse Response /ŶƚĞƌŶĂůWŽǁĞƌŝƐƐŝƉĂƟŽŶ;tͿ 40 35 30 25 20 15 10 5 0 0 25 50 75 100 Case Temperature, TC (°C) Figure 5: Small Signal Pulse Response PA99U Rev D Figure 6: Large Signal Response with Current Limit 5 PA99 • PA99A Figure 7: Open Loop Gain vs. Frequency Figure 8: Phase Response 0 160 -60 100 80 60 -80 -100 -120 -140 40 0 Cc=15pF -40 120 -160 20 -180 1 10 100 1k 10k 100k 1M 10M Frequency (Hz) Figure 9: Common Mode Rejection vs. Frequency 6 -20 Cc=15pF Phase,Ɍ (°) Open Loop Gain (dB) 140 -200 1 10 100 1k 10k 100k 1M 10M 100M Frequency (Hz) Figure 10: Power Supply Rejection PA99U Rev D PA99 • PA99A Figure 11: Quiescent Current Figure 12: Output Voltage Swing Figure 13: Input Noise vs. Frequency Figure 14: Negative Current Limit Resistor Input Noise EN, N (nV/ √Hz) 20 19 Vs = +/- 1100V Z>сϱϬŬɏ AV = -100 18 17 16 15 14 13 0 20k 40k 60k 80k 100k 120k Frequency (Hz) PA99U Rev D 7 PA99 • PA99A Figure 15: Slew Rate vs. Compensation Figure 16: Harmonic Distortion Figure 17: Temperature Diode (1mA Bias) Figure 18: Temperature Diode (500µA Bias) 0.8 0.75 0.7 VBE (V) 0.65 0.6 0.55 0.5 0.45 0.4 -60 -40 -20 0 20 40 60 80 100 120 140 Temperature (°C) 8 PA99U Rev D PA99 • PA99A SAFE OPERATING AREA (SOA) Figure 19: SOA KƵƚƉƵƚƵƌƌĞŶƚĨƌŽŵцsS ;ŵͿ T T C C =8 =2 5° 5° C C 10 1 100 ϭ͕ϬϬϬ ^ƵƉƉůLJƚŽKƵƚƉƵƚŝīĞƌĞŶƟĂů͕VS - VO (V) PA99U Rev D 9 PA99 • PA99A 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.apexanalog.com for Apex Microtechnology’s complete Application Notes library, Technical Seminar Workbook, and Evaluation Kits. TYPICAL APPLICATION Figure 20: Typical Application Circuit Figure 20 shows PA99 in a typical inverting amplifier circuit. The resistors RLIM+ and RLIM- are used to limit the current output. If no current limit is desired, a direct connection between CL+ and OUT is required for proper operation, and CL- must be connected to -VS with a resistor larger or equal 200 k in that case. OUTPUT CURRENT AND DEVICE COOLING PA99 can handle output currents of ±50mA, but careful considerations need to be done about proper cooling of the device to avoid damage due to overheating. When calculating the power loss inside the device, the output current and the quiescent currents need to be considered. For example, if the device uses a supply voltage of 1000V, the output voltage to a resistive load is 500V and the output current is 50mA, the power loss inside the device is calculated as follows: P DEVICE =  1000V – 500V    50 + 4 mA = 27W In the above example, the device will dissipate 27W of heat. If we supply 1500V instead of 1000V, the power dissipation of the device doubles, resulting in a loss of 54W. As alternative to extensive device cooling, it should be considered to alter the supply voltage of the device. If the PA99 is used in a test environment where is needs to drive 50mA at 500V but 5mA at 2000V, consider supplying two voltages, i.e. 1000V and 2500V, and provide for sufficient cooling for the approximate 30W of power dissipation of the device. 10 PA99U Rev D PA99 • PA99A OVERVOLTAGE PROTECTION Although the PA99 can withstand differential input voltages up to ±20V, additional external protection is recommended. In most applications 1N4148 signal diodes connected anti-parallel across the input pins are sufficient. In more demanding applications where bias current is important diode connected JFETs such as 2N4416 will be required. In either case the differential input voltage will be clamped to ±0.7V. This is usually sufficient overdrive to produce the maximum power bandwidth. CURRENT LIMIT PA99 allows independent setting of a positive and negative current limit. POSITIVE CURRENT LIMIT The resistor value RLIM+ for positive current limit is calculated as follows: 0.65V R LIM    = ------------------I LIM  A  Positive Current Limit Measured Resistor Value (RLIM+) 5mA 10mA 20mA 40mA 130 Ω 68 Ω 32.4 Ω 15.8 Ω NEGATIVE CURRENT LIMIT The current limit resistor for the negative current limit can be approximated as: R LIM    = 5324  e 76.4  I LIM A Negative Current Limit Measured Resistor Value (RLIM-) 5mA 10mA 20mA 40mA 8 kΩ 15 kΩ 33 kΩ 92 kΩ TEMPERATURE SENSING The temperature sensing pins of the PA99 are connected to a 1N4448 type of diode that can be used to sense the temperature inside the device. A typical application will use a current source as the best means for the excitation of the diode. PA99U Rev D 11 PA99 • PA99A PACKAGE OPTIONS Part Number Apex Package Style Description PA99 CW 12-pin Power DIP, High Voltage PA99A CW 12-pin Power DIP, High Voltage PACKAGE STYLE CW .020 0.220 ±0.05 1.605 ±0.05 3.669 3.300 2.935 ±0.05 1 12 2 11 3 10 4 9 5 8 6 7 0.400 ±0.002 TYP 0.025 ±0.002 2.969±0.01 .115R 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. 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