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P r o d u c t I n n o v a t i o n F r o m PA95 PA95U 1 Copyright © Cirrus Logic, Inc. 2009 (All Rights Reserved)http://www.cirrus.com JUN 2009 APEX − PA95UREVK
FEATURES
♦ HIGH VOLTAGE — 900V (±450V) ♦ LOW QUIESCENT CURRENT — 1.6mA ♦ HIGH OUTPUT CURRENT — 100mA ♦ PROGRAMMABLE CURRENT LIMIT
APPLICATIONS
♦ HIGH VOLTAGE INSTRUMENTATION ♦ PROGRAMMABLE POWER SUPPLIES UP TO ±430V ♦ MASS SPECTROMETERS ♦ SEMICONDUCTOR MEASUREMENT EQUIPMENT High Voltage Power Operational Amplifiers PA95P r o d u c t I n n o v a t i o n F r o m Q1 Q2 R1A R1B C2 CC1 CC2 R11 R12 Q29 R20 R27 Q30 Q29 ILIM OUT Q14 R19 Q21 Q14 +VS –IN +IN –VS R10 Q5A Q5B
DESCRIPTION
The PA95 is a high voltage, MOSFET operational am- plifier designed as a low cost solution for driving contin- uous output currents up to 100mA and pulse currents up to 200mA into capacitive loads. The safe operating area (SOA) has no second breakdown limitations and can be observed for all load types by choosing an ap- propriate current limiting resistor. The MOSFET output stage is biased AB for linear operation. External com- pensation provides flexibility in choosing bandwidth and slew rate for the application. Cirrus’s Power SIP package uses a minimum of board space allowing for high density circuit boards. The Power SIP package is electrically isolated. Isolating thermal washers (TW13) are recommended to prevent arcing from pins to heat- sink. EQUIVALENT SCHEMATIC
P r o d u c t I n n o v a t i o n F r o m PA95
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CAUTION The PA95 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. Parameter Symbol Min Max Units SUPPLY VOLTAGE, +VS to -VS 900 V OUTPUT CURRENT, source, sink, within SOA 200 mA POWER DISSIPATION, continuous @ TC = 25°C 30 W INPUT VOLTAGE, differential -20 20 V INPUT VOLTAGE, common mode (Note 3) -VS VS V TEMPERATURE, pin solder, 10s max. 260 °C TEMPERATURE, junction (Note 2) 150 °C TEMPERATURE RANGE, storage −40 85 °C OPERATING TEMPERATURE RANGE, case −25 85 °C CHARACTERISTICS AND SPECIFICATIONS AbSOLUTE MAXIMUM RATINgS Parameter Test Conditions1 Min Typ Max Units INPUT OFFSET VOLTAGE, initial 0.5 5 mV OFFSET VOLTAGE vs. temperature Full temperature range 15 50 µV/°C OFFSET VOLTAGE vs. supply 10 25 µV/V OFFSET VOLTAGE vs. time 75 µV/kHz BIAS CURRENT, initial 200 2000 pA BIAS CURRENT vs. supply 4 pA/V OFFSET CURRENT, initial 50 500 pA INPUT RESISTANCE, DC 1011 Ω INPUT CAPACITANCE 4 pF COMMON MODE VOLTAGE RANGE (Note 3) VS=±250V ±VS Ŧ 30 V COMMON MODE REJECTION, DC VCM = ±90V 80 98 dB NOISE 10KHz bandwidth, RS = 1KΩ 2 µV RMS gAIN OPEN LOOP @ 15Hz RL = 5KΩ 94 118 dB GAIN BANDWIDTH PRODUCT @ 1MHz RL = 5KΩ 10 MHz POWER BANDWIDTH RL = 5KΩ 20 kHz PHASE MARGIN, A V = 10 Full temp range 60 ° OUTPUT VOLTAGE SWING I O = 70mA ±VS Ŧ 24 ±VS Ŧ 20 V CURRENT, continuous 100 mA SLEW RATE, A V = 100 CC =4.7pF 30 V/µS SETTLING TIME, to 0.1% 2V Step 1 µS RESISTANCE no load 100 Ω SPECIFICATIONS
P r o d u c t I n n o v a t i o n F r o m PA95 PA95U 3 NOTES: 1. Unless otherwise noted: TC = 25°C, DC input specifications are ± value given. Power supply voltage is typical rating. Cc= 4.7pF. 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 25°C case. No derating needed above 25°C case. 1 2 4 6 7 8 10 12 * * * 0.01µF or greater ceramic power supply bypassing required. –IN +IN C C1 C C2 OUT I LIM –Vs +Vs CC RLIM PATENTED 8-pin SIP PACKAgE STYLE DQ Formed leads available See package style EC EXTERNAL CONNECTIONS Parameter Test Conditions1 Min Typ Max Units POWER SUPPLY VOLTAGE (Note 5) ±50 ±300 ±450 V CURRENT, quiescent 1.6 2.2 mA THERMAL RESISTANCE, AC, junction to case (Note 4) Full temp range, F > 60Hz 2.5 °C/W RESISTANCE, DC, junction to case Full temp range, F < 60Hz 4.2 °C/W RESISTANCE, junction to air Full temp range 30 °C/W TEMPERATURE RANGE, case -25 +85 °C PHASE COMPENSATION CC rated for full supply voltage. gAIN CC ≥100 4.7pF .7 RLIM = ILIM
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TEMPERATURE, T (°C) POWER DERATING INTERNAL POWER DISSIPATION, P(W) 10 100 10K 1M FREQUENCY, F (Hz) OUTPUT CURRENT, IO (mA) OUTPUT VOLTAGE SWING 3 10 20 100 CURRENT LIMIT RESISTOR, RCL (Ω) 200 CURRENT LIMIT CURRENT LIMIT, ILIM (mA) 5 50 INPUT NOISE VOLTAGE DROP FROM SUPPLY, VS – VO (V) 120 100 150 T = TC T = TA SAFE OPERATING AREA SUPPLY TO OUTPUT DIFFERENTIAL, VS –VO (V) OUTPUT CURRENT FROM +VS OR –VS, (mA) DC, T C = 125°C DC, T C = 85°C 200mS PULSE CURVES @ 10% DUTY CYCLE MAX DC, T C = 25°C 100mS 100 100 150 200 250 500 1K 1M 2M 3M 4M 5M FREQUENCY, F (Hz) -90 -135 -180 -225 -270 -315 -360 PHASE RESPONSE PHASE, Ф (°) CC = 4.7pF 100K 300K FREQUENCY, F (Hz) 500 POWER RESPONSE OUTPUT VOLTAGE, VO (VP-P) 100 10K CC = 4.7pF 200 0 200 600 800 1000 TOTAL SUPPLY VOLTAGE, VS (V) 1.08 1.04 1.00 .96 .92 .88 QUIESCENT CURRENT QUIESCENT CURRENT, I (X) 400 FREQUENCY, F (Hz) SMALL SIGNAL RESPONSE OPEN LOOP GAIN, A (dB) 120 100 100 1K 10K 100K 1M 10M10 CC = 4.7pF INPUT NOISE VOLTAGE, VN (nV/√Hz) 0 1004 20 6040 TC = 25°C TC = –55°C TC = 125°CTC = 85°C TYPICAL APPLICATION Piezo positioning may be applied to the focusing of seg- mented mirror systems. The composite mirror may be composed of hundreds of elements, each requiring focus- ing under computer control. In such complex systems the PA95 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. FR PA95 INR PIEZO DRIVE S–V S+V OUTV COMPUTER FOCUS COMMAND VOLTAGE CLR
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The PA95 is stable at gains of 10 or more with a NPO (COG) compensation capacitor of 4.7pF. 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 4.7pF is not recommended. EXTERNAL COMPONENTS The compensation capacitor Cc must be rated for the total supply voltage. An NPO (COG)capacitor rated a 1kV is recommended. Of equal importance are the voltage rating and voltage coefficient of the gain setting feedback resistor. Typical volt- age ratings of low wattage resistors are 150 to 250V. Up to 500 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 The operating voltages of the PA95 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. CONTACTINg CIRRUS LOgIC SUPPORT For all Apex Precision Power product questions and inquiries, call toll free 800-546-2739 in North America. For inquiries via email, please contact tucson.support@cirrus.com. International customers can also request support by contacting their local Cirrus Logic Sales Representative. To find the one nearest to you, go to www.cirrus.com IMPORTANT NOTICE Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives con- sent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. 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. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROP- ERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, AUTOMOTIVE SAFETY OR SECURITY DEVICES, LIFE SUPPORT PROD- UCTS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUS- TOMER’S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE CUSTOMER OR CUSTOMER’S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES, BY SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL LIABILITY, INCLUDING ATTORNEYS’ FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES. Cirrus Logic, Cirrus, and the Cirrus Logic logo designs, Apex Precision Power, Apex and the Apex Precision Power logo designs are trademarks of Cirrus Logic, Inc. All other brand and product names in this document may be trademarks or service marks of their respective owners.