MP108 * MP108A MP108 * MP108A MP108, MP108A Power Operational Amplifier FEATURES DESCRIPTION The MP108 operational amplifier is a surface mount constructed component that provides a cost effective solution in many industrial applications. The MP108 offers outstanding performance that rivals much more expensive hybrid components yet has a footprint of only 4 sq in. The MP108 has many optional features such as four-wire current limit sensing and external compensation. The 300 kHz power bandwidth and 10 amp output of the MP108 makes it a good choice for piezo transducer drive applications. The MP108 is built on a thermally conductive but electrically insulating substrate that can be mounted to a heat sink. * LOW COST * HIGH VOLTAGE - 200 VOLTS * HIGH OUTPUT CURRENT - 10 AMPS * 100 WATT DISSIPATION CAPABILITY * 300kHz POWER BANDWIDTH APPLICATIONS * * * * * INKJET PRINTER HEAD DRIVE PIEZO TRANSDUCER DRIVE INDUSTRIAL INSTRUMENTATION REFLECTOMETERS ULTRA-SOUND TRANSDUCER DRIVE EQUIVALENT CIRCUIT DIAGRAM +Vb 8 +Vb 4 C1 GND 3 BACK PLATE 2 TP 1 R1 5 Cc2 6 14 +Vs Q17 R3 Q1B Q1A 15 +Vs 16 +Vs C5 Q2 D1 SUBSTRATE BACKPLATE Cc1 R2 Q6 Q7 Q4 R5 Q8 11 OUT Q9 R15 D2 R7 Q11 Q14 R9 Q15A R10 28 +Ilim 27 -Ilim R8 Q15B R11 Q16 IC1 20 OUT 21 OUT Q18 R12 +IN 33 Q19 22 OUT R17 Q23 GND 32 C3 R19 12 OUT 13 OUT Q12 Q13 -IN 34 Q3 Q20 Q24 Q22 Q21 R20 17 -Vs -Vb 30 18 -Vs -Vb 25 19 -Vs www.apexanalog.com MP108U Copyright (c) Apex Microtechnology, Inc. 2012 (All Rights Reserved) SEP 2012 MP108U REVF1 MP108 * MP108A ABSOLUTE MAXIMUM RATINGS Parameter Symbol Min SUPPLY VOLTAGE, +VS to -VS Max Units 200 V SUPPLY VOLTAGE, +VB (Note 6) +VS, +15 V SUPPLY VOLTAGE, -VB (Note 6) -VS, -15 V OUTPUT CURRENT, peak, within SOA 12 A POWER DISSIPATION, internal, DC 100 W +VB to -VB V 225 C 150 C INPUT VOLTAGE TEMPERATURE, pin solder, 10s TEMPERATURE, junction (Note 2) TEMPERATURE, storage -40 +105 C OPERATING TEMPERATURE RANGE, case -40 +85 C SPECIFICATIONS Parameter Test Conditions (Note 1) MP108 Min MP108A Typ Max 1 5 Min Typ Max Units * 3 mV INPUT OFFSET VOLTAGE OFFSET VOLTAGE, vs. temperature Full temp range 50 * V/C OFFSET VOLTAGE, vs. supply 20 * V/V BIAS CURRENT, initial (Note 3) 100 70 pA BIAS CURRENT, vs. supply 0.1 * pA/V 50 30 pA OFFSET CURRENT, initial INPUT RESISTANCE, DC INPUT CAPACITANCE 1011 * 4 * pF COMMON MODE VOLTAGE RANGE +VB - 15 * V COMMON MODE VOLTAGE RANGE -VB + 15 * V COMMON MODE REJECTION, DC NOISE 92 1MHz BW, RS = 1K * 10 dB * V RMS GAIN OPEN LOOP, @ 15Hz RL = 10K, CC = 10pF 96 GAIN BANDWIDTH PRODUCT CC = 10pF @ 1MHz PHASE MARGIN 2 Full temp range * 10 45 dB * * MHz MP108U MP108 * MP108A Test Conditions (Note 1) Parameter MP108 Min Typ MP108A Max Min Typ Max Units OUTPUT VOLTAGE SWING I O = 10A +VS - 10 +VS - 8.6 * * V VOLTAGE SWING I O = -10A -VS + 10 -VS + 7 * * V VOLTAGE SWING I O = 10A, +VB = +VS +10V +VS - 1.6 * V VOLTAGE SWING I O = -10A, -VB = -VS -10V -VS + 5.1 * V CURRENT, CONTINUOUS, DC 10 SLEW RATE, A V = -20 CC= 10pF SETTLING TIME to 0.1% 2V step RESISTANCE POWER BANDWIDTH 180VP-P 150 11 170 * A * V/S 1 * S No load, DC 5 * CC = 10pF, +VS = 100V, -VS = -100V 300 * kHz POWER SUPPLY VOLTAGE 15 CURRENT, quiescent 75 100 50 65 * * * V * * mA THERMAL RESISTANCE, AC, junction to case (Note 5) RESISTANCE, DC, junction to case RESISTANCE, junction to air (Note 4) TEMPERATURE RANGE, case NOTES: * 1. 2. 3. 4. 5. 6. MP108U Full temp range, F60Hz 1 * C/W Full temp range, F<60Hz 1.25 * C/W Full temp range 13 * C/W * C -40 +85 * The specification of MP108A is identical to the specification for MP108 in the applicable column to the left. Unless otherwise noted: TC = 25C, CC = 100pF. 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. Doubles for every 10C of case temperature increase. +VS and -VS denote the positive and negative supply voltages to the output stage. +VB and -VB denote the positive and negative supply voltages to the input stages. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. Power supply voltages +VB and -VB must not be less than +VS and -VS respectively. 3 MP108 * MP108A POWER DERATING 2 PHASE, () 20 0.001 30 = PO 100 1K 10K 30K FREQUENCY, F (Hz) 40 0 40 80 120 160 200 TOTAL SUPPLY VOLTAGE, VS (V) OUTPUT VOLTAGE, VO (VP-P) 115 20 OUTPUT VOLTAGE SWING 8 7 6 5 4 W/O BOOST TC = 25C 50mS PULSE 2 ITH 0 0 M -V S T FRO OOS W/O B 3 1 FROM +V S VS M- RO F ST O BO W ROM +V S OOST F WITH B 2 4 6 8 10 OUTPUT CURRENT, IO (A) 100K 1M FREQUENCY, F (Hz) 5M QUIESCENT CURRENT vs. TEMPERATURE NORMALIZED QUIESCENT CURRENT, IO (%) 0.01 P = 10W O 0W 10 NORMALIZED QUIESCENT CURRENT, IO (%) NORMALIZED CURRENT LIMIT, (%) DISTORTION, THD (%) PO TC = -40C 60 pF = TC = 25C 100 0W 20 80 F AV = 20 CC = 10pF VS = 52V RL = 4 9 TC = 85C C C= HARMONIC DISTORTION 100 F -25 0 25 50 75 100 CASE TEMPERATURE, TC (C) QUIESCENT CURRENT vs. SUPPLY 120 20 10K 100 1K 10K 100K 1M 10M FREQUENCY, F (Hz) 110 105 100 95 90 -40 -20 0 20 40 60 80 100 CASE TEMPERATURE, (C) 10 1 SAFE OPERATING AREA C 5 C =2 5 T C =2 S, T C 5C , m =2 5C 10 0mS C , T =8 10 DC , T C DC 0.1 0 10 10p 80 RL = 4 IO = 1A DC 20 10M C C= 90 40 pF 100 CC = 100pF 60 100 220 110 CC = 33pF 80 pF CURRENT LIMIT CC = 10pF 100 1M FREQUENCY, F (Hz) POWER RESPONSE 200 120 10 100 1K 10K 100K 1M 10M FREQUENCY, F (Hz) 120 70 -50 SMALL SIGNAL RESPONSE W/O BOOST 1 C C= RL = 4 IO = 1A 180 300K 5M 470 40 1M FREQUENCY, F (Hz) 150 33p CC = 470pF 60 1 2 1 CC = 10pF 2 CC = 33pF 3 CC = 100pF RL = 4 IO = 1A C C= CC = 220pF 80 1 4 CC = 33pF 100 130 1 CC = 10pF 2 CC = 33pF 3 CC = 100pF RL = 4 IO = 1A 1 120 C C= OPEN LOOP GAIN, A (dB) 120 OPEN LOOP GAIN, A (dB) SMALL SIGNAL RESPONSE W/ BOOST 0 1 2 150 210 100K 0 -40 -20 0 20 40 60 80 100 CASE TEMPERATURE, TC (C) 20 1 180 2 3 120 40 90 3 PHASE, () 80 60 PHASE RESPONSE W/O BOOST PHASE RESPONSE W/ BOOST 90 OUTPUT CURRENT FROM +VS OR -VS (A) 100 VOLTAGE DROP FROM SUPPLY, (V) INTERNAL POWER DISSIPATION, P(W) TYPICAL PERFORMANCE GRAPHS 0.2 1 10 100 200 SUPPLY TO OUTPUT DIFFERENTIAL, VS-VO (V) MP108U MP108 * MP108A EXTERNAL CONNECTIONS C1 + C2 C5 C6 CC 2 1 3 BACK GND PLT TP OUT 4 5 6 7 8 9 10 +VB CC1 CC2 NC +VB NC -IN +IN GND NC -VB VIEW FROM COMPONENT SIDE NC NC +ILIM -ILIM NC -VB 34 33 32 31 30 29 28 27 26 25 24 11 OUT OUT 12 14 15 16 NC +VS +VS +VS NC -VS -VS -VS 19 18 17 23 22 21 13 20 OUT OUT OUT RLIM C7 C8 + C4 LOAD & FEEDBACK NOTES: CC IS NPO (COG) RATED FOR FULL SUPPLY VOLTAGE +VS TO -VS BOTH PINS 3 AND 32 REQUIRED CONNECTED TO SIGNAL GROUND C2 AND C3 ELECTROLYTIC 10F PER AMP OUTPUT CURRENT C1,C4,C5-8 HIGH QUALITY CERAMIC 0.1F ALL OUTPUT PINS MUST BE TIED TOGETHER TYPICAL APPLICATION INKJET NOZZLE DRIVE C3 CC 100pF 33pF 10pF CC 470pF 220pF 33pF PHASE COMPENSATION GAIN W/O BOOST TYP. SLEW RATE 1 55 V/S 4 135 V/S 10 170 V/S TYP. SLEW RATE GAIN W BOOST 12 V/S 1 35 V/S 3 135 V/S 10 The MP108's fast slew rate and wide power bandwith make it an ideal nozzle driver for industrial inkjet printers. The 10 amp output capability can drive hundreds of nozzles simultaneously. RF +VS RI +VS +VB GND PRINT NOZZLE COMMAND VOLTAGE -ILIM CC2 OUT CC1 +ILIM GND -VS RLIM 34-pin DIP PACKAGE STYLE FD PIEZO TRANSDUCER -VB CC -VS MP108U 5 MP108 * MP108A GENERAL Please read Application Note 1 "General Operating Considerations" which covers stability, power 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. GROUND PINS The MP108 has two ground pins (pins 3, 32). These pins provide a return for the internal capacitive bypassing of the small signal portions of the MP108. The two ground pins are not connected together on the substrate. Both of these pins are required to be connected to the system signal ground. SAFE OPERATING AREA The MOSFET output stage of the MP108 is not limited by second breakdown considerations as in bipolar output stages. Only thermal considerations and current handling capabilities limit the SOA (see Safe Operating Area graph on previous page). The output stage is protected against transient flyback by the parasitic body diodes of the output stage MOSFET structure. However, for protection against sustained high energy flyback external fast-recovery diodes must be used. COMPENSATION The external compensation capacitor CC is connected between pins 5 and 6. Unity gain stability can be achieved with any capacitor value larger than 100pF for a minimum phase margin of 45 degrees. At higher gains more phase shift can usually be tolerated in most designs and the compensation capacitor value can be reduced resulting in higher bandwidth and slew rate. Use the typical operating curves as a guide to select CC for the application. An NPO (COG) type capacitor is required rated for the full supply voltage (200V). OVERVOLTAGE PROTECTION Although the MP108 can withstand differential input voltages up to 25V, additional external protection is recommended. In most applications 1N4148 signal diodes connected anti-parallel across the input pins is sufficient. In more demanding applications where bias current is important diode connected JFETs such as 2N4416 will be required. See Q1 and Q2 in Figure 1. In either case the differential input voltage will be clamped to 0.7V. This is usually sufficient overdrive to produce the maximum power bandwidth. Some applications will also need over voltage protection devices connected to the power supply rails. Unidirectional zener diode transient suppressors are recommended. 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. See Z1 and Z2 in Figure 1. +Vs Z1 +Vs -IN 34 3 GND +Vb Q2 OUT Q1 33 GND +IN -Vb 32 -Vs -Vs Z2 FIGURE 1. OVERVOLTAGE PROTECTION POWER SUPPLY BYPASSING Bypass capacitors to power supply terminals +VS and -VS must be connected physically close to the pins to prevent local parasitic oscillation in the output stage of the MP108. Use electrolytic capacitors at least 10F per output amp required. Bypass the electrolytic capacitors with high quality ceramic capacitors (X7R) 0.1F or greater. In most applications power supply terminals +VB and -VB will be connected to +VS and -VS respectively. Supply voltages +VB and -VB are bypassed internally but both ground pins 3 and 32 must be connected to the system signal ground to be effective. In all cases power to the buffer amplifier stage of the MP108 at pins 8 and 25 must be connected to +VB and -VB at pins 4 and 30 respectively. Provide local bypass capacitors at pins 8 and 25. See the external connections diagram on page 1. 6 MP108U MP108 * MP108A CURRENT LIMIT RF The two current limit sense lines are to be connected directly across the current limit sense resistor. For the current limit to work correctly pin 28 must be connected to the amplifier output side and pin 27 connected to the load side of the current limit resistor RLIM as shown in Figure 2. This connection will bypass any parasitic resistances RP, formed by socket and solder joints as well as internal amplifier losses. The current limiting resistor may not be placed anywhere in the output circuit except where shown in Figure 2. The value of the current limit resistor can be calculated as follows: RLIM = .65/ILIMIT RIN 34 IN 33 27 ILIM28 ILIM+ RP OUT 11-13 20-22 RLIM RL FIGURE 2. 4 WIRE CURRENT LIMIT BOOST OPERATION With the boost feature the small signal stages of the amplifier are operated at a higher supply voltages than the amplifieris high current output stage. +VB (pins 4,8) and -VB (pins 25,30) are connected to the small signal stages and +VS (pins 14-16) and -VS (pins 17-19) are connected to the high current output stage. An additional 10V on the +VB and -VB pins is sufficient to allow the small signal stages to drive the output stage into the triode region and improve the output voltage swing for extra efficient operation when required. When the boost feature is not needed +VS and -VS are connected to the +VB and -VB pins respectively. The +VB and -VB pins must not be operated at supply voltages less than +VS and -VS respectively. BACKPLATE GROUNDING The substrate of the MP108 is an insulated metal substrate. It is required that it be connected to signal ground. Connect pin 2 (back plate) to signal ground. The back plate will then be AC grounded to signal ground through a 1F capacitor. 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. APEX MICROTECHNOLOGY PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN PRODUCTS USED FOR LIFE SUPPORT, AUTOMOTIVE SAFETY, SECURITY DEVICES, OR OTHER CRITICAL APPLICATIONS. PRODUCTS IN SUCH APPLICATIONS ARE UNDERSTOOD TO BE FULLY AT THE CUSTOMER OR THE CUSTOMER'S RISK. Apex Microtechnology, Apex and Apex Precision Power are trademarks of Apex Microtechnolgy, Inc. All other corporate names noted herein may be trademarks of their respective holders. www.apexanalog.com MP108U Copyright (c) Apex Microtechnology, Inc. 2012 (All Rights Reserved) SEP 2012 7 MP108U REVF