PA15FL PA15FLA. High Voltage Power Operational Amplifiers PA15FL PA15FLA APPLICATIONS PA15FL, PA15FLA FEATURES 10-PIN SIP PACKAGE STYLE FL
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1 P r o d u c t IP nr no od vu ac t i oi n n o v a t i o n F r o m F r o m PAFL, PAFLA FEATURES HIGH VOLTAGE 4V (±V) LOW COST LOW QUIESCENURRENT 3.mA MAX HIGH OUTPUURRENT ma PROGRAMMABLE CURRENT LIMIT PAFL PAFLA PAFL PAFLA High Voltage Power Operational Amplifiers APPLICATIONS PIEZOELECTRIC POSITIONING HIGH VOLTAGE INSTRUMENTATION ELECTROSTATIC TRANSDUCERS PROGRAMMABLE POWER SUPPLIES UP TO 44V TYPICAL APPLICATION -PIN SIP PACKAGE STYLE FL Formed leads available See package style FU DESCRIPTION The PAFL is a high voltage, low quiescent current MOSFET operational amplifier designed as a low cost solution for driving continuous output currents up to ma and pulse currents up to 3mA into capacitive loads. The safe operating area (SOA) has no second breakdown limitations and can be observed for all type loads by choosing an appropriate current limiting resistor. The MOSFET input stage has integrated static and differential mode protection. The MOSFET output stage is biased AB for linear operation. External compensation provides flexibility in choosing bandwidth and slew rate for the application. The -pin power SIP package is electrically isolated. EQUIVALENT SCHEMATIC COMPUTER FOCUS COMMAND VOLTAGE R IN -V S R F PAFL LOW POWER, PIEZOELECTRIC POSITIONING 7 PIEZO DRIVE V OUT R R3 Q3 Q Q Q Q CC 9 CC Q R R R R9 Q Q Q3 R4 R7 Q4 ILIM 7 OUT 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 PAFL 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. EXTERNAL CONNECTIONS NC S S I LIM NC V +V OUT Q Q R Q4 PHASE COMPENSATION R R GAIN 33pf KΩ OPEN OPEN. I CL Copyright Cirrus Logic, Inc. PAFLU MAR (All Rights Reserved) APEX PAFLUREVE
2 PAFL PAFLA ABSOLUTE MAXIMUM RATINGS SUPPLY VOLTAGE, to 4V SPECIFICATIONS OUTPUURRENT, source, sink See SOA POWER DISSIPATION, = C 3W INPUT VOLTAGE, differential ±V INPUT VOLTAGE, common mode ±V S TEMPERATURE, pin solder - s max C TEMPERATURE, junction C TEMPERATURE RANGE, storage 4 to + C OPERATING TEMPERATURE RANGE, case to + C PAFL PAFLA PARAMETER TESONDITIONS MIN TYP MAX MIN TYP MAX UNITS INPUT OFFSET VOLTAGE, initial. 3 mv OFFSET VOLTAGE, vs. temperature Full temperature range µv/ C OFFSET VOLTAGE, vs. supply * * µv/v OFFSET VOLTAGE, vs. time 7 * µv/ kh BIAS CURRENT, initial * * pa BIAS CURRENT, vs. supply 4 * pa/v OFFSEURRENT, initial 3 pa INPUT IMPEDANCE, DC * Ω INPUAPACITANCE 4 * pf COMMON MODE VOLTAGE RANGE 3 ±V S * V COMMON MODE REJECTION, DC V CM = ±9V 9 * * db NOISE KHz BW, R S = KΩ, = OPEN * µvrms GAIN OPEN Hz R L = KΩ, = OPEN 94 * * db GAIN BANDWIDTH PRODUCT at MHz R L = KΩ, = OPEN. * MHz POWER BANDWIDTH R L = KΩ, = OPEN 4 * khz PHASE MARGIN Full temperature range * OUTPUT VOLTAGE SWING 3 I O = ±ma ±V S ±V S * * V CURRENT, continuous ± * ma SLEW RATE, A V = = OPEN 3 V/µs CAPACITIVE LOAD, A V = + Full temperature range * pf SETTLING TIME to.% = OPEN, V step * µs RESISTANCE, no load * Ω POWER SUPPLY VOLTAGE See note ± ± ± * * * V CURRENT, quiescent,. 3. * * ma THERMAL RESISTANCE, AC, junction to case 4 Full temperature range, F > Hz. * C/W RESISTANCE, DC, junction to case Full temperature range, F < Hz 4. * C/W RESISTANCE, junction to air Full temperature range 3 * C/W TEMPERATURE RANGE, Case Meets full range specifications + * * C NOTES: * The specification of PAFLA is identical to the specification for PAFL in applicable column to the left.. Unless otherwise noted: = C, compensation =, = KΩ, =. DC input specifications are ± value given. Power supply voltage is typical rating.. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. 3. and denote the positive and negative power supply rail respectively. 4. Rating applies if the output current alternates between both output transistors at a rate faster than Hz.. Derate max supply rating. V/ C below C case. No derating needed above C case. CAUTION The PAFL 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 C to avoid generating toxic fumes. PAFLU
3 PAFL PAFLA OUTPUT STAGE INTERNAL POWER DISSIPATION, P (W) POWER DERATING 7 CASE TEMPERATURE, ( C) QUIESCENURRENT, I Q (ma)...4. QUIESCENURRENT = C = - C = C = C TOTAL SUPPLY VOLTAGE, V S OUTPUT VOLTAGE, V O (V P-P ) K POWER RESPONSE CC = pf CC = 33pf CC K K K SMALL SIGNAL RESPONSE SMALL SIGNAL RESPONSE 4 PHASE RESPONSE OPEN LOOP GAIN, A (db) 4 OPEN LOOP GAIN, A (db) 4 3 PHASE, Ф ( ) 9 3 K K.M M M K M M 7 K M M VOLTAGE DROP FROM SUPPLY, V O 4 C SWING FROM C C C 4 LOAD CURRENT, I (ma) VOLTAGE DROP FROM SUPPLY, V O 4 4 SWING FROM C C C C 4 LOAD CURRENT, I (ma) OUTPUT IMPEDANCE, R (Ω) OPEN LOOP OUTPUT IMPEDANCE K K M 3M DISTORTION, (%) HARMONIC DISTORTION R L = K A = 3 watt mw K K 3K COMMON MODE REJECTION, CMR (db) COMMON MODE REJECTION 4 K K.M M POWER SUPPLY REJECTION, PSR (db) POWER SUPPLY REJECTION 4 K K.M M M PAFLU 3
4 PAFL PAFLA GENERAL Please read Application Note "General Operating Considerations" which covers stability, supplies, heat sinking, mounting, current limit, SOA interpretation, and specification interpretation. Visit for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit; heat sink selection; Apex Precision Power s complete Application Notes library; Technical Seminar Workbook; and Evaluation Kits. CURRENT LIMIT For proper operation, the current limit resistor ( ) must be connected as shown in the external connection diagram. The minimum value is 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 ohms.. = I LIM SAFE OPERATING AREA (SOA) The MOSFET output stage of this power operational amplifier has two distinct limitations:. The current handling capability of the MOSFET geometry and the wire bonds.. The junction temperature of the output MOSFETs. OUTPUURRENT FROM OR, (ma) 3 3 SOA ms DC, = C DC, = C ms DC, = C PULSE % DUTY CYCLE MAX 7 SUPPLY TO OUTPUT DIFFERENTIAL, V S V O INPUT PROTECTION Although the PAFL can withstand differential input voltages up to ±V, additional external protection is recommended. In most applications N44 or N94 signal diodes are sufficient (D-D4 in Figure a). In more demanding applications where low leakage or low capacitance are of concern N44 or N47-N49 JFETs connected as diodes will be required (Q-Q4 in Figure b). In either case the input differential voltage will be clamped to ±.4V. This is sufficient 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 overshoot 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 are 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 PAFL has sufficient phase margin to be stable with most capacitive loads at a gain of or more, using the recommended phase compensation. The PAFL 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 must be rated at V working voltage. An NPO capacitor is recommended. The compensation network must be mounted closely to the amplifier pins and 9 to avoid spurious oscillation. FIGURE. OVERVOLTAGE PROTECTION a. b. Q Q3 D D3 Q Q4 D D4 PAFL PAFL Z Z Z Z 4 PAFLU
5 PAFL PAFLA CONTACTING CIRRUS LOGIC SUPPORT For all Apex Precision Power product questions and inquiries, call toll free in North America. For inquiries via , please contact International customers can also request support by contacting their local Cirrus Logic Sales Representative. To find the one nearest to you, go to 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 consent 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 OTHERITICAL 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 OUSTOMER 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. PAFLU
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