POWER OPERATIONAL AMPLIFIER MP108FD HTTP://WWW.APEXMICROTECH.COM M I C R O T E C H N O L O G Y (800) 546-APEX (800) 546-2739 FEATURES • 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 34-pin DIP PACKAGE STYLE FD TYPICAL APPLICATION RF +VS DESCRIPTION The MP108FD operational amplifier is a surface mount constructed component that provides a cost effective solution in many industrial applications. The MP108FD offers outstanding performance that rivals much more expensive hybrid components yet has a footprint of only 4 sq in. The MP108FD 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 MP108FD makes it a good choice for piezo transducer drive applications. The MP108FD is built on a thermally conductive but electrically insulating substrate that can be mounted to a heat sink. +VS RI PRINT NOZZLE COMMAND VOLTAGE 8 +Vb 4 C1 GND 3 BACK PLATE 2 TP 1 R1 CC2 Cc2 R3 R5 Q8 D2 R7 Q11 Q14 Q15A R10 Q16 C3 Q19 -Vb 30 -Vb 25 R19 C6 Q20 1 20 OUT Q18 Q24 C1 + C2 C5 CC R17 GND 32 12 OUT 27 -Ilim IC1 R12 Q23 EXTERNAL CONNECTIONS 28 +Ilim R8 Q15B R11 NOZZLE DRIVE 13 OUT Q12 Q13 R9 Q3 11 OUT Q9 R15 6 +IN 33 15 +Vs Q7 Q4 PIEZO TRANSDUCER The MP108FD'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. Q6 5 -IN 34 INKJET 14 +Vs Q2 D1 GND RLIM CC 16 +Vs C5 -VB -VS OUT CC1 +ILIM -VS Q17 Q1B Q1A SUBSTRATE BACKPLATE Cc1 R2 GND -ILIM EQUIVALENT CIRCUIT DIAGRAM +Vb +VB TP 2 3 BACK GND PLT OUT 4 5 6 7 8 9 10 +VB CC1 CC2 NC +VB NC NC 21 OUT -IN +IN GND NC -VB VIEW FROM COMPONENT SIDE NC +ILIM -ILIM NC NC -VB NC 22 OUT 34 33 32 31 30 29 24 23 28 27 26 25 11 22 OUT OUT 12 21 13 20 14 15 16 +VS +VS +VS -VS -VS -VS 19 18 17 OUT OUT OUT Q22 C7 RLIM C8 Q21 R20 17 -Vs 18 -Vs 19 -Vs + 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 ≥ 10µF PER AMP OUTPUT CURRENT C1,C4,C5-8 HIGH QUALITY CERAMIC ≥ 0.1µF ALL OUTPUT PINS MUST BE TIED TOGETHER C3 C4 LOAD & FEEDBACK CC 100pF 33pF 10pF CC 470pF 220pF 33pF PHASE COMPENSATION TYP. SLEW RATE GAIN W/O BOOST 55 V/µS ≥1 135 V/µS ≥4 170 V/µS ≥ 10 TYP. SLEW RATE GAIN W BOOST 12 V/µS ≥1 35 V/µS ≥3 135 V/µS ≥ 10 APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected] 1 MP108FD ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS PARAMETER INPUT OFFSET VOLTAGE OFFSET VOLTAGE vs. temperature OFFSET VOLTAGE vs. supply BIAS CURRENT, initial3 BIAS CURRENT vs. supply OFFSET CURRENT, initial INPUT RESISTANCE, DC INPUT CAPACITANCE COMMON MODE VOLTAGE RANGE COMMON MODE VOLTAGE RANGE COMMON MODE REJECTION, DC NOISE ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS SUPPLY VOLTAGE, +VS to -VS SUPPLY VOLTAGE, +VB SUPPLY VOLTAGE, -VB OUTPUT CURRENT, peak POWER DISSIPATION, internal, DC INPUT VOLTAGE TEMPERATURE, pin solder, 10s TEMPERATURE, junction2 TEMPERATURE RANGE, storage OPERATING TEMPERATURE, case TEST CONDITIONS1 MIN Full temperature range 200V +VS + 15V6 -VS – 15V6 12A, within SOA 100W +VB to -VB 225°C. 150°C. -40 to 105°C. -40 to 85°C. TYP MAX UNITS 1 20 5 50 20 100 0.1 50 mV µV/°C µV/V pA pA/V pA Ω pF V V dB µV RMS 1011 4 +VB - 15 -VB + 15 92 1MHz bandwidth, 1kΩ RS 10 GAIN OPEN LOOP @ 15Hz GAIN BANDWIDTH PRODUCT @ 1MHz PHASE MARGIN RL = 10KΩ, CC = 10pF CC = 10pF Full temperature range 96 dB MHz degrees 10 45 OUTPUT VOLTAGE SWING VOLTAGE SWING VOLTAGE SWING VOLTAGE SWING CURRENT, continuous, DC SLEW RATE, AV = -20 SETTLING TIME, to 0.1% RESISTANCE POWER BANDWIDTH 180VP-P IO = 10A IO = -10A IO = 10A, +VB = +VS +10V IO = -10A, -VB = -VS -10V CC = 10pF 2V Step No load, DC CC = 10pF, +VS = 100V, -VS = -100V +VS - 10 -VS + 10 +VS - 1.6 -VS + 5.1 10 150 +VS - 8.6 -VS + 7 ±15 ±75 50 V V V V A V/µS µS Ω kHz 170 1 5 300 POWER SUPPLY VOLTAGE CURRENT, quiescent ±100 65 V mA 1 1.25 13 85 °C/W °C/W °C/W °C THERMAL RESISTANCE, AC, junction to case5 RESISTANCE, DC, junction to case RESISTANCE, junction to air TEMPERATURE RANGE, case Full temperature range, f ≤ 60Hz Full temperature range, f < 60Hz Full temperature range -40 NOTES: 1. Unless otherwise noted: TC=25°C, compensation CC=100pF, 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 MTBF. 3. Doubles for every 10°C of case temperature increase. 4. +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. 5. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. 6. Power supply voltages +VB and -VB must not be less than +VS and -VS respectively. APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 2 MP108FD POWER DERATING 100 2 60 40 1M FREQUENCY, F (Hz) 180 300K 5M SMALL SIGNAL RESPONSE W/O BOOST 0W = 0.01 P = 10W O 10 PO 100 1K 10K 30K FREQUENCY, F (Hz) TC = -40°C 60 40 0 40 80 120 160 200 TOTAL SUPPLY VOLTAGE, VS (V) 9 8 T FROM +V S W/O BOOS 7 6 5 4 3 2 1 0 0 W/O ST F BOO TC = 25°C 50mS PULSE ROM -V S OM FR ST -V S O ITH BO W ROM +V S OOST F WITH B 2 4 6 8 10 OUTPUT CURRENT, IO (A) OUTPUT VOLTAGE, VO(VP-P) NORMALIZED QUIESCENT CURRENT, IO (%) OPEN LOOP GAIN, A (dB) NORMALIZED QUIESCENT CURRENT, IO (%) TC = 25°C OUTPUT CURRENT FROM +VS OR -VS (A) PO 80 OUTPUT VOLTAGE SWING VOLTAGE DROP FROM SUPPLY, (V) 20 TC = 85°C pF 0W = 100 100K 1M FREQUENCY, F (Hz) 5M QUIESCENT CURRENT vs. TEMPERATURE 115 110 105 100 95 90 -40 -20 0 20 40 60 80 100 CASE TEMPERATURE, (°C) SAFE OPERATING AREA 20 10 1 C 5° C =2 5° T C =2 S, , T C 5°C m =2 5°C 10 0mS C , T =8 10 DC , T C DC AV = 20 CC = 10pF ±VS = 52V RL = 4Ω QUIESCENT CURRENT vs. SUPPLY 120 100 HARMONIC DISTORTION 1 20 10K 100 1K 10K 100K 1M 10M FREQUENCY, F (Hz) C C= -25 0 25 50 75 100 CASE TEMPERATURE, TC (°C) RL = 4Ω IO = 1A DC 20 F 80 40 F 90 CC = 100pF 60 100 10p 100 CC = 33pF 80 pF 110 CC = 10pF 100 220 120 10M POWER RESPONSE pF CURRENT LIMIT 130 1M FREQUENCY, F (Hz) 200 0 10 10 100 1K 10K 100K 1M 10M FREQUENCY, F (Hz) 1 C C= RL = 4Ω IO = 1A 150 470 40 2 1 CC = 10pF 2 CC = 33pF 3 CC = 100pF RL = 4Ω IO = 1A C C= CC = 470pF 120 33p CC = 220pF 60 0.001 30 1 1 C C= CC = 33pF 80 0.1 1 CC = 10pF 2 CC = 33pF 3 CC = 100pF RL = 4Ω IO = 1A 120 100 70 -50 2 150 210 100K 0 -40 -20 0 20 40 60 80 100 CASE TEMPERATURE, TC (°C) 0 1 1 180 20 20 3 C C= OPEN LOOP GAIN, A (dB) 90 3 120 SMALL SIGNAL RESPONSE W/ BOOST NORMALIZED CURRENT LIMIT, (%) PHASE RESPONSE W/O BOOST PHASE, Θ (°) 80 120 DISTORTION, THD (%) PHASE RESPONSE W/ BOOST 90 2 PHASE, Θ (°) INTERNAL POWER DISSIPATION, P(W) TYPICAL PERFORMANCE GRAPHS 0.2 1 10 100 200 SUPPLY TO OUTPUT DIFFERENTIAL, VS-VO (V) APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected] 3 MP108FD OPERATING CONSIDERATIONS GENERAL POWER SUPPLY BYPASSING 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.apexmicrotech.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit, heat sink selection, Apex's complete Application Notes library, Technical Seminar Workbook and Evaluation Kits. 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 MP108FD. Use electrolytic capacitors at least 10µF per output amp required. Bypass the electrolytic capacitors with high quality ceramic capacitors (X7R) 0.1µF 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 MP108FD 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. GROUND PINS The MP108FD has two ground pins (pins 3, 32). These pins provide a return for the internal capacitive bypassing of the small signal portions of the MP108FD. 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. +Vs Z1 SAFE OPERATING AREA RF The MOSFET output stage of the MP108FD 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 C C 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 MP108FD can withstand differential input voltages up to ±25V, additional external protection is recommended. In most applications 1N4148 signal diodes connected antiparallel 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. -IN 34 +Vs 3 GND +Vb Q2 RIN OUT 34 IN 33 GND +IN -Vs -Vs -Vb 32 27 ILIM- Q1 33 28 RP ILIM+ OUT 11-13 20-22 RLIM RL Z2 FIGURE 1 OVERVOLTAGE PROTECTION FIGURE 2 4 WIRE CURRENT LIMIT CURRENT LIMIT 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 BOOST OPERATION With the boost feature the small signal stages of the amplifier are operated at a higher supply voltages than the amplifierís 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 MP108FD 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 1µF capacitor. This data sheet has been carefully checked and is believed• to5980 be reliable, however, no responsibility for possible inaccuracies All specifications areHOTLINE: subject to change without notice. APEX MICROTECHNOLOGY CORPORATION NORTH SHANNON ROAD •is assumed TUCSON, ARIZONA 85741or•omissions. USA • APPLICATIONS 1 (800) 546-2739 4 MP108 REV B AUGUST 2004 © 2004 Apex Microtechnology Corp.