PA98

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PA98 • PA98A PA98U 1 P r o d u c t I n n o v a t i o n F r o m PA98, PA98A

FEATURES

♦ HIGH VOLTAGE — 450V (±225V) ♦ HIGH SLEW RATE — 1000V/μS ♦ HIGH OUTPUT CURRENT — 200mA

APPLICATIONS

♦ HIGH VOLTAGE INSTRUMENTATION ♦ PIEZO TRANSDUCER EXCITATION ♦ PROGRAMMABLE POWER SUPPLIES UP TO 430V ♦ ELECTROSTATIC TRANSDUCERS & DEFLECTION COMP OUT +VS +VS –VS –VS C C L L Q1 Q2 Q3 Q8 Q9 Q6 Q7 Q12 Q10A Q10B Q11 Q17 Q13 Q15 Q18 D23 –IN +IN Power Operational Amplifiers PA98 • PA98AP r o d u c t I n n o v a t i o n F r o m

DESCRIPTION

The PA98 is a high voltage, high power bandwidth MOSFET operational amplifier designed for output currents up to 200mA. Output voltages can swing up to ±215V with a dual supply and up to +440 volts with a single supply. The safe operating area (SOA) has no second breakdown limitations and can be observed with all types of loads by choosing an appropriate cur- rent limiting resistor. High accuracy is achieved with a cascode input circuit configuration. All internal biasing is referenced to a bootstrapped zener-MOSFET cur- rent source. As a result, the PA98 features an unprec- edented supply range and excellent supply rejection. The MOSFET output stage is biased on for linear oper- ation. External compensation provides user flexibility. This hybrid circuit utilizes thick film (cermet) resistors, ceramic capacitors and silicon semiconductor chips to maximize reliability, minimize size and give top perfor- mance. Ultrasonically bonded aluminum wires provide reliable interconnections at all operating temperatures. The Power SIP package is electrically isolated. EQUIVALENT SCHEMATIC Copyright © Cirrus Logic, Inc. 2009 (All Rights Reserved)www.cirrus.com NOV 2009 APEX − PA98REVK

PA98 • PA98A

2 PA98U

P r o d u c t I n n o v a t i o n F r o m The PA98 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. CAUTION 1 2 3 4 5 6 7 8 9 10 –IN +IN RCL +Vs –Vs TO LOAD AND FEEDBACK 11 12 Rc Cc * Bypassing required. NC PATENTED 12-pin SIP PACKAGE STYLE DP Formed leads available Package style EE EXTERNAL CONNECTIONS Parameter Symbol Min Max Units SUPPLY VOLTAGE, +VS to -VS 450 V OUTPUT CURRENT, continuous within SOA 200 mA POWER DISSIPATION, continuous @ TC = 25°C (Note 2) 30 W INPUT VOLTAGE, differential -25 25 V INPUT VOLTAGE, common mode -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 1. CHARACTERISTICS AND SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS Parameter Test Condi- tions1 PA98 PA98A UnitsMin Typ Max Min Typ Max INPUT OFFSET VOLTAGE, initial 0.5 2 0.25 0.5 mV OFFSET VOLTAGE vs. temp Full temp range 10 30 5 10 µV/°C OFFSET VOLTAGE vs. supply 3 10 * * µV/V OFFSET VOLTAGE vs. time 75 * µV/kHz BIAS CURRENT, initial (Note 3) 5 50 3 10 pA BIAS CURRENT, vs. supply 0.01 * pA/V OFFSET CURRENT, initial (Note 3) 10 100 3 30 pA INPUT IMPEDANCE, DC 1011 * Ω INPUT CAPACITANCE 4 * pF COMMON MODE VOLTAGE RANGE (Note 4) ±VS - 15 * V COMMON MODE REJECTION, DC VCM = ±90V 90 110 * * dB

PA98 • PA98A PA98U 3 P r o d u c t I n n o v a t i o n F r o m NOTES: * The specification of PA98A is identical to the specification for PA98 in applicable column to the left. 1. Unless otherwise noted: TC = 25°C, compensation = CC = 68pF, RC = 100Ω. DC input specifications are ± value given. Power supply voltage is typical rating. 2. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. Ratings apply only to output transistors. An addi- tional 10W may be dissipated due to quiescent power. 3. Doubles for every 10°C of temperature increase. 4. +V S and –VS denote the positive and negative power supply rail respectively. 5. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. 6. Derate max supply rating 0.625 V/°C below 25°C case. No derating needed above 25°C case. Parameter Test Condi- tions1 PA98 PA98A UnitsMin Typ Max Min Typ Max NOISE 100kHz BW, RS = 1KΩ, CC = 10pf 1 * µV RMS GAIN OPEN LOOP GAIN @ 15Hz RL = 2KΩ, CC = OPEN 96 111 * * dB GAIN BANDWIDTH PRODUCT @ 1MHz RL = 2KΩ, CC = 3.3pf 100 * MHz POWER BANDWIDTH CC = 10pf 300 * kHz CC = 3.3pf 500 * kHz PHASE MARGIN Full temp range 60 * ° OUTPUT VOLTAGE SWING (Note 4) IO = ±200mA ±VS - 10 ±VS - 6.5 * * V VOLTAGE SWING (Note 4) IO = ±75mA ±VS - 8.5 ±VS - 6.0 * * V VOLTAGE SWING (Note 4) IO = ±20mA ±VS - 8.0 ±VS - 5.5 * * V CURRENT, continuous TC = 85°C ±200 * mA SLEW RATE, A V = 20 CC = 10pf 400 * V/µS SLEW RATE, A V = 100 CC = OPEN 1000 700 * V/µS CAPACITIVE LOAD, A V = +1 Full temp range 470 * pF SETTLING TIME to 0.1% CC = 10pf, 2V step 1 * µS RESISTANCE, no load RCL = 0 50 * Ω POWER SUPPLY VOLTAGE (Note 6) Full temp range ±15 ±150 ±225 * * * V CURRENT, quiescent 21 25 * * mA THERMAL RESISTANCE, AC, junction to case (Note 5) 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 Meets full range specifications -25 +85 * * °C

PA98 • PA98A

4 PA98U

P r o d u c t I n n o v a t i o n F r o m CURRENT LIMIT RESISTOR VALUE, RCL (Ω) 2 1051 CURRENT LIMIT, ILIM (mA) 300 500 100 200 POWER SUPPLY REJECTION FREQUENCY, F (Hz) 10 1K1001 POWER SUPPLY REJECTION, PSR (dB) 100 10K 120 140 1M100K COMMON MODE REJECTION FREQUENCY, F (Hz) 10K 1M100K1K COMMON MODE REJECTION, CMR (dB) 100 10M 120 140 CC = 10pF INPUT NOISE VOLTAGE FREQUENCY, F (Hz) 100 10K1K10 INPUT NOISE VOLTAGE, VN (nV√Hz) 100K HARMONIC DISTORTION FREQUENCY, F (Hz) 100 10K1K10 DISTORTION, (%) .03 .003 .001 100K .05 .005 .01 AV = 30 PO = 15W CC = 10pF RL = 1KΩ SLEW RATE EXT. COMPENSATION CAPACITOR, CC (pF) 15 45300 SLEW RATE, (V/µS) 500 200 100 1000 75 90 SMALL SIGNAL RESPONSE FREQUENCY, F (Hz) 200K 2M500K50K OUTPUT VOLTAGE, VO (VPP) 250 125 100 500 C C = 68pF C C = 3.3pF C C = 10pF RL = 2KΩ SMALL SIGNAL RESPONSE OUTPUT CURRENT, IO (mA) 50 2001501000 VOLTAGE DROP FROM SUPPLY, VS - VO (V) 250 TC = 125°C TC = -55°C TC = 25°C SMALL SIGNAL RESPONSE FREQUENCY, F (Hz) 100 1K 1M100K10K 10M10 OPEN LOOP GAIN, A (dB) -20 CC = 3.3pF CC = 10pF CC = 68pF 20M 120 100 QUIESCENT CURRENT TOTAL SUPPLY VOLTAGE, VS (V) 100 200 4504003000 NORMALIZED QUIESCENT CURRENT, IQ (X) 1.15 1.10 1.05 1.00 .95 .90 TC = 125°C TC = -55°C TC = 25°C 1.20 PHASE RESPONSE FREQUENCY, F (Hz) 1M 10M 40M.2M PHASE, Ф (°) -45 -90 -135 -180 -225 -270 CC = 68pF CC = 3.3pF CC = 10pF POWER DERATING CASE TEMPERATURE, TC (°C) 25 50 12510075 1500 OUTPUT STAGE INTERNAL POWER DISSIPATION, P (W)

PA98 • PA98A PA98U 5 P r o d u c t I n n o v a t i o n F r o m 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.cirrus.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit; heat sink selec- tion; Apex Precision Power’s complete Application Notes library; Technical Seminar Workbook; and Evaluation Kits. CURRENT LIMIT For proper operation, the current limit resistor (RCL) must be connected as shown in the external connection dia- gram. The minimum value is 1.4 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 30 ohms. .7 RCL = ILIM - .016 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 ge- ometry 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. SAFE OPERATING CURVES The safe operating area curves define the maximum additional internal power dissipation the amplifier can tolerate when it produces the necessary output to drive an external load. This is not the same as the absolute maximum internal power dissipation listed elsewhere in the specification since the quiescent power dissipation is significant compared to the total. SOA SUPPLY TO OUTPUT DIFFERENTIAL, VS - VO (V) OUTPUT CURRENT FROM +VS OR -VS (mA) 25 50 75 100 125 250 500 500 300 200 100 PULSE CURVES @ 10% DUTY CYCLE MAX. 100mS 200mS DC, T C = 25°C DC, T C = 125°C DC, T C = 85°C TYPICAL APPLICATION DYNAMIC FOCUSING Dynamic focusing is the active correction of focusing voltage as a beam traverses the face of a CRT. This is necessary in high resolution flat face monitors since the distance between cathode and screen varies as the beam moves from the center of the screen to the edges. PA98 lends itself well to this func- tion since it can be connected as a summing amplifier with inputs from the nominal focus potential and the dynamic cor- rection. The nominal might be derived from a potentiometer, or perhaps automatic focusing circuitry might be used to generate this potential. The dynamic correction is generated from the sweep voltages by calculating the distance of the beam from the center of the display. PHASE COMPENSATION Gain CC RC 1 68pF 100Ω 20 10pF 330Ω 100 3.3pF 0Ω CC RATED FOR FULL SUPPLY VOLTAGE 2z = x + y2 IN1R FR CLR +225V 225V PA98 IN2R DC FOCUS X SWEEP SAMPLE Y SWEEP SAMPLE TO FOCUS GRID

PA98 • PA98A

6 PA98U

P r o d u c t I n n o v a t i o n F r o m INPUT PROTECTION Although the PA98 can withstand differential voltages up to ±25V, additional external protection is recommended. Since the PA98 is a high speed amplifier, low leakage, low capacitance JFETs connected as diodes are recom- overdrive to produce maximum power bandwidth. 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 over- shoot 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 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. STABILITY The PA98 is externally compensated and performance can be tailored to the application. Use the graphs of small signal response and power response as a guide. The compensation capacitor CC must be rated at 500V working voltage. An NPO capacitor is recommended. The compensation network CCRC must be mounted closely to the am- plifier pins 7 and 8 to avoid spurious oscillation. INTERNAL POWER DISSIPATION AND HEATSINK SELECTION With the unique combination of high voltage and speed of the PA98, traditional formulas for heatsink selection will falsely lower the apparent power handling capability of this amplifier. To more accurately predict operating tempera- tures use Power Design1 revision 10 or higher, or use the following procedure: Find internal dissipation (PD) resulting from driving the load. Use Power Design or refer to Apex Precision Power Applications Note 1, General Operating Considertaions, paragraph 7. Find total quiescent power (PDQ) by multiply- ing 0.025A by VSS (total supply voltage). Find output stage quiescent power (PDQOUT) by multiplying 0.001 by VSS. Calculate a heatsink rating which will maintain the case at 85°C or lower. TC - TA PD + PDQ RØSA = -0.1°C/W Where: TC = maximum case temperature allowed TA = maximum ambient temperature encountered Calculate a heatsink rating which will maintain output transistor junctions at 150°C or lower. TJ - TA - (PD + PDQOUT) * RØJC PD + PDQ RØSA = -0.1°C/W Where: TJ = maximum junction temperature allowed. RØJC = AC or DC thermal resistance from the specification table. Use the larger heatsink of these two calculations. Power Design is an Excel spreadsheet available free from www.cirrus.com +VS –IN +IN 11, 12 7, 8 6PA98 –VS FIGURE 1. OVERVOLTAGE PROTECTION

PA98 • PA98A PA98U 7 P r o d u c t I n n o v a t i o n F r o m 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 apex.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.