PA15FL • PA15FLA PA15FL • PA15FLA Product IPnrno odvuac tt i Ionnn o v a t i o n F r o m PA15FL, PA15FLA From High Voltage Power Operational Amplifiers FEATURES • HIGH VOLTAGE — 450V (±225V) • LOW COST • LOW QUIESCENT CURRENT — 3.0mA Max • HIGH OUTPUT CURRENT — 200mA • PROGRAMMABLE CURRENT LIMIT APPLICATIONS 10-pin SIP PACKAGE STYLE fl • PIEZOELECTRIC POSITIONING • HIGH VOLTAGE INSTRUMENTATION • ELECTROSTATIC TRANSDUCERS • PROGRAMMABLE POWER SUPPLIES UP TO 440V Formed leads available See package style FU TYPICAL APPLICATION RF DESCRIPTION The PA15FL is a high voltage, low quiescent current MOSFET operational amplifier designed as a low cost solution for driving continuous output currents up to 200mA and pulse currents up to 350mA 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 10-pin power SIP package is electrically isolated. EQUIVALENT SCHEMATIC 6 +VS R1 R2 Q1 C1 Q3 Q6 9 CC1 Q5 R4 8 CC2 Q8 R7 Q4 ILIM 7 Q11 1 –IN R8 R9 1 COMPUTER FOCUS COMMAND VOLTAGE –VS 5 R11 Q12 EXTERNAL CONNECTIONS 2 Q13 3 4 5 NC NC –VS http://www.cirrus.com 6 7 +VS I LIM 8 9 C C2 C C1 RC +IN 10 OUT CC Q14 RCL Q16 PHASE COMPENSATION R12 GAIN ≥1 ≥ 10 CC 33pf OPEN RCL ≅ PA15FLU RCL 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 PA15FL 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. 1 R10 Q15 7 5 VOUT -VS –IN 2 +IN 2 PIEZO DRIVE 10 PA15FL 10 OUT R6 R5 6 RIN LOW POWER, PIEZOELECTRIC POSITIONING R3 Q2 +VS Copyright © Cirrus Logic, Inc. 2009 (All Rights Reserved) RC 1KΩ OPEN .6 ICL MAY 20091 APEX − PA15FLUREVC PA15FL • PA15FLA P r o d u c t I n n o v a t i o nF r o m ABSOLUTE MAXIMUM RATINGS SUPPLY VOLTAGE, +VS to –VS OUTPUT CURRENT, source, sink POWER DISSIPATION, continuous @ TC = 25°C INPUT VOLTAGE, differential INPUT VOLTAGE, common mode TEMPERATURE, pin solder - 10s max TEMPERATURE, junction2 TEMPERATURE RANGE, storage OPERATING TEMPERATURE RANGE, case SPECIFICATIONS PARAMETER TEST CONDITIONS 1 INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE, vs. temperature OFFSET VOLTAGE, vs. supply OFFSET VOLTAGE, vs. time BIAS CURRENT, initial BIAS CURRENT, vs. supply OFFSET CURRENT, initial INPUT IMPEDANCE, DC INPUT CAPACITANCE COMMON MODE VOLTAGE RANGE3 COMMON MODE REJECTION, DC NOISE VCM = ±90V 10KHz BW, RS = 1KΩ, CC = OPEN GAIN OPEN LOOP, @ 15Hz GAIN BANDWIDTH PRODUCT at 1MHz POWER BANDWIDTH PHASE MARGIN RL = 2KΩ, CC = OPEN RL = 2KΩ, CC = OPEN RL = 2KΩ, CC = OPEN Full temperature range OUTPUT VOLTAGE SWING3 CURRENT, continuous SLEW RATE, AV = 100 CAPACITIVE LOAD, AV = +1 SETTLING TIME to .1% RESISTANCE, no load POWER SUPPLY VOLTAGE 5 CURRENT, quiescent, THERMAL RESISTANCE, AC, junction to case 4 RESISTANCE, DC, junction to case RESISTANCE, junction to air TEMPERATURE RANGE , Case MIN Full temperature range IO = ±200mA CC = OPEN Full temperature range CC = OPEN, 2V step See note 5 Full temperature range, F > 60Hz Full temperature range, F < 60Hz Full temperature range Meets full range specifications ±VS –15 80 94 PA15FL PA15FLA TYP MAX MIN TYP MAX 2 15 10 75 200 4 50 1011 4 98 2 111 5.8 24 60 ±VS–15 ±VS–10 ±200 20 100 2 50 ±50 –25 450V See SOA 30W ±25V ±VS 260°C 150°C –40 to +85°C –25 to +85°C ±150 2.0 30 10 .5 3 50 5 20 50 * * * 2000 * * * 500 30 200 * * * * * * * UNITS mV µV/°C µV/V µV/√kh pA pA/V pA Ω pF V dB µVrms * * * * dB MHz kHz ° * * * 20 30 * * * V mA V/µs pf µs Ω ±225 * 3.0 * * * * 2.5 * 4.2 * * +85 * * V mA °C/W °C/W °C/W °C NOTES: * The specification of PA15FLA is identical to the specification for PA15FL in applicable column to the left. 1. Unless otherwise noted: TC = 25°C, compensation = CC = 33pF, RC = 1KΩ, RCL = 0. 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. 3. +VS and –VS 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 60Hz. 5. Derate max supply rating .625 V/°C below 25°C case. No derating needed above 25°C case. CAUTION The PA15FL 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. 2 PA15FLU PA15FL • PA15FLA QUIESCENT CURRENT, IQ (mA) 90 CC = 33pF 0 VOLTAGE DROP FROM SUPPLY, +VS – VO (V) 100 1K 10K .1M 1M FREQUENCY, F (Hz) 85°C 8 125°C 6 –55°C 4 25°C 2 0 .3 .1 40 80 120 160 LOAD CURRENT, I (mA) 200 HARMONIC DISTORTION RL = 1K CC = Open A = 30 5 watt .01 .001 30 PA15FLU 50 mW 100 1K 10K 30K FREQUENCY, F (Hz) PHASE, Ф (°) CC = 33pF 0 –10 100K 10M SWING FROM +VS 10 10 1M FREQUENCY, F (Hz) 16 12 125°C 8 100 –55°C 0 25°C 40 80 120 160 LOAD CURRENT, I (mA) CC = Open 80 60 40 1K 10K 100 .1M FREQUENCY, F (Hz) 1M 350 10M CC = Open 300 250 200 150 100 50 0 10K 200 COMMON MODE REJECTION 20 10 1M FREQUENCY, F (Hz) OPEN LOOP OUTPUT IMPEDANCE 85°C 0 CC = Open 180 400 20 4 135 270 100K 10M SWING FROM –VS 24 CC = 33pF 225 OUTPUT IMPEDANCE, R (Ω) 20 CC = Open 20 VOLTAGE DROP FROM SUPPLY, +VS – VO (V) 40 30 POWER SUPPLY REJECTION, PSR (dB) OPEN LOOP GAIN, A (dB) 40 COMMON MODE REJECTION, CMR (dB) OPEN LOOP GAIN, A (dB) 100 CC = Open n pe 45 60 100K 200K 10K FREQUENCY, F (Hz) PHASE RESPONSE 50 80 2K SMALL SIGNAL RESPONSE 120 –20 10 DISTORTION, (%) =O SMALL SIGNAL RESPONSE 20 f TC = -55°C 2.0 100 300 200 400 450 TOTAL SUPPLY VOLTAGE, VS (V) 25 50 75 100 125 150 CASE TEMPERATURE, TC (°C) 5p 2.2 100 =1 0 TC = 25°C f 0 TC = 85°C 3p 8 2.4 =3 16 TC = 125°C 2.6 CC 24 500 CC 32 POWER RESPONSE QUIESCENT CURRENT 2.8 OUTPUT VOLTAGE, VO (VP-P) POWER DERATING 40 CC OUTPUT STAGE INTERNAL POWER DISSIPATION, P (W) P r o d u c t I n n o v a t i o nF r o m 100K 1M FREQUENCY, F (Hz) 3M POWER SUPPLY REJECTION 120 100 80 60 40 20 0 1 10 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) 3 PA15FL • PA15FLA P r o d u c t I n n o v a t i o nF r o m GENERAL POWER SUPPLY PROTECTION 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 selection; Apex Precision Power’s complete Application Notes library; Technical Seminar Workbook; and Evaluation Kits. 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. CURRENT LIMIT For proper operation, the current limit resistor (RCL) must be connected as shown in the external connection diagram. The minimum value is 2 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 150 ohms. .6 RCL = ILIM 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 geometry and the wire bonds. 2. The junction temperature of the output MOSFETs. SOA STABILITY The PA15FL has sufficient phase margin to be stable with most capacitive loads at a gain of 10 or more, using the recommended phase compensation. The PA15FL 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 amplifier pins 8 and 9 to avoid spurious oscillation. FIGURE 2. OVERVOLTAGE PROTECTION 500 a. OUTPUT CURRENT FROM +VS OR –VS, (mA) Z1 0m S 10 200 0m S DC ,T C DC ,T 100 C ,T C 50 = 1 –IN = 25 °C +IN 85 D1 D2 D3 D4 2 °C DC = 12 6 PA15FL 5 Z2 5° C –VS b. 30 +VS Z1 20 10 25 PULSE CURVES @ 10% DUTY CYCLE MAX 50 75 100 125 250 SUPPLY TO OUTPUT DIFFERENTIAL, VS –VO (V) 1 –IN Although the PA15FL can withstand differential input voltages up to ±25V, additional external protection is recommended. In most applications 1N4148 or 1N914 signal diodes are sufficient (D1-D4 in Figure 2a). 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-Q4 in Figure 2b). In either case the input differential voltage will be clamped to ±1.4V. This is sufficient overdrive to produce maximum power bandwidth. Q2 Q1 500 INPUT PROTECTION 4 +VS 20 300 +IN Q3 Q4 6 PA15FL 2 5 Z2 –VS PA15FLU P r o d u c t I n n o v a t i o nF r o m PA15FL • PA15FLA 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 [email protected]. 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). 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