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POWER OPERATIONAL AMPLIFIER
MP108FD
MICROTECHNOLOGY
HTTP://WWW.APEXMICROTECH.COM
(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.
RI PRINT NOZZLE COMMAND VOLTAGE -VB +VS +VB
GND -ILIM CC2 GND OUT CC1 +ILIM RLIM
-VS
PIEZO TRANSDUCER CC
EQUIVALENT CIRCUIT DIAGRAM
+Vb +Vb GND BACK PLATE TP 8 4 C1 3 2 1 SUBSTRATE BACKPLATE Cc1 Cc2 5 6 Q12 Q13 R9 R15 Q1A C5 D1 Q4 Q1B Q2 Q7 Q8 Q9 D2 R7 Q14 Q15A R10 R12 Q15B R11 IC1 Q18 Q19 R17 GND 32 C3 -Vb 30 -Vb 25 Q23 R19 Q24 R20 Q20 Q21 17 -Vs 18 -Vs 19 -Vs R8 Q16 Q11 R1 R2 Q17 R3 14 +Vs 15 +Vs 16 +Vs Q6 R5 Q3 11 OUT 12 OUT 13 OUT 28 +Ilim
C5
-VS
INKJET
NOZZLE DRIVE
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.
EXTERNAL CONNECTIONS
C1 + C2 C6 CC OUT 6 CC2 7 NC 8 +VB 9 NC 10 NC NC 23 22 21 20 11 OUT OUT 12 13 14 +VS -VS 19 15 +VS -VS 18 16 +VS -VS 17
-IN 34
27 -Ilim 20 OUT 21 OUT 22 OUT Q22
-IN 34 +IN 33
1 TP GND 32
2
3
4 +VB
5 CC1
BACK GND PLT NC 31 -VB 30
VIEW FROM COMPONENT SIDE NC +ILIM -ILIM NC NC -VB 29 28 27 RLIM 26 25 24
+IN 33
OUT OUT OUT C7 C8
+ 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
C3 C4
CC 100pF 33pF 10pF CC 470pF 220pF 33pF
PHASE COMPENSATION TYP. SLEW RATE GAIN W/O BOOST 55 V/S 1 135 V/S 4 170 V/S 10 TYP. SLEW RATE GAIN W BOOST 12 V/S 1 35 V/S 3 135 V/S 10
APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com
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MP108FD
ABSOLUTE MAXIMUM RATINGS
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
200V +VS + 15V6 -VS - 15V6 12A, within SOA 100W +VB to -VB 225C. 150C. -40 to 105C. -40 to 85C.
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
TEST CONDITIONS1
Full temperature range
MIN
TYP
1 20
MAX
5 50 20 100 0.1 50 +VB - 15 -VB + 15
UNITS
mV V/C V/V pA pA/V pA pF V V dB V RMS dB MHz degrees V V V V A V/S S kHz
1011 4 92 1MHz bandwidth, 1k RS RL = 10K, CC = 10pF CC = 10pF Full temperature range 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 96 10 45 +VS - 10 -VS + 10 +VS - 1.6 -VS + 5.1 10 150 +VS - 8.6 -VS + 7 10
GAIN
OPEN LOOP @ 15Hz GAIN BANDWIDTH PRODUCT @ 1MHz PHASE MARGIN
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
170 1 5 300 75 50 100 65 1 1.25 13 85
POWER SUPPLY
VOLTAGE CURRENT, quiescent 15 V mA 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 NOTES: 1. Unless otherwise noted: TC=25C, 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 10C 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. Full temperature range, f 60Hz Full temperature range, f < 60Hz Full temperature range -40
APEX MICROTECHNOLOGY CORPORATION * 5980 NORTH SHANNON ROAD * TUCSON, ARIZONA 85741 * USA * APPLICATIONS HOTLINE: 1 (800) 546-2739
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TYPICAL PERFORMANCE GRAPHS
MP108FD
PHASE RESPONSE W/ BOOST
90 2 3
INTERNAL POWER DISSIPATION, P(W)
POWER DERATING
100 80 60 40 20 0 -40 -20 0 20 40 60 80 100 CASE TEMPERATURE, TC (C) PHASE, ()
PHASE RESPONSE W/O BOOST
90 2 3 PHASE, () 1
120
1 2 1 CC = 10pF 2 CC = 33pF 3 CC = 100pF RL = 4 IO = 1A 1M FREQUENCY, F (Hz)
120 2 150 1 CC = 10pF 2 CC = 33pF 3 CC = 100pF RL = 4 IO = 1A 1M FREQUENCY, F (Hz)
150
180
1
1
210 100K
5M
180 300K
10M
SMALL SIGNAL RESPONSE W/ BOOST
120 OPEN LOOP GAIN, A (dB) 100 80 60 40 20 0 1 RL = 4 IO = 1A 10 100 1K 10K 100K 1M 10M FREQUENCY, F (Hz)
NORMALIZED QUIESCENT CURRENT, IO (%)
SMALL SIGNAL RESPONSE W/O BOOST
120
200
POWER RESPONSE
OUTPUT VOLTAGE, VO(VP-P)
10 CC= 33 CC=
CC = 33pF CC = 220pF CC = 470pF
OPEN LOOP GAIN, A (dB)
CC = 10pF 100 CC = 33pF 80 CC = 100pF 60 40 20 0 10 RL = 4 IO = 1A DC 100 1K 10K 100K 1M 10M FREQUENCY, F (Hz)
100
pF
pF
47 CC= 0pF
22 CC= 0pF
10 CC= 0pF
20 10K NORMALIZED QUIESCENT CURRENT, IO (%)
100K 1M FREQUENCY, F (Hz)
5M
NORMALIZED CURRENT LIMIT, (%)
CURRENT LIMIT
130 120 110 100 90 80 70 -50
QUIESCENT CURRENT vs. SUPPLY
120
QUIESCENT CURRENT vs. TEMPERATURE
115 110 105 100 95 90 -40 -20 0 20 40 60 80 100 CASE TEMPERATURE, (C)
100 TC = 85C 80 TC = 25C 60 TC = -40C
-25 0 25 50 75 100 CASE TEMPERATURE, TC (C)
40 0 40 80 120 160 200 TOTAL SUPPLY VOLTAGE, VS (V)
VOLTAGE DROP FROM SUPPLY, (V)
1 DISTORTION, THD (%) AV = 20 CC = 10pF VS = 52V RL = 4
PO
= 10
9 8 7 6 5 4 3 2 1 0 0
W/O BOO ST F ROM -V S
W/O BOOS T FROM +V S
OUTPUT CURRENT FROM +VS OR -VS (A)
HARMONIC DISTORTION
OUTPUT VOLTAGE SWING
SAFE OPERATING AREA
20
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
10
0.1
=
20
0W
0W
0.01 P = 10W O
PO
TC = 25C 50mS PULSE
W
ITH
BO
O
OM FR ST
-V S
1
WITH B
ROM +V S OOST F
0.001 30
100 1K 10K 30K FREQUENCY, F (Hz)
2 4 6 8 10 OUTPUT CURRENT, IO (A)
1 10 100 200 SUPPLY TO OUTPUT DIFFERENTIAL, VS-VO (V)
0.2
APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com
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MP108FD
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.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.
OPERATING CONSIDERATIONS
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 MP108FD. 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 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.
+Vs Z1
RF
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.
SAFE OPERATING AREA
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.
-IN 34 +Vs +Vb 3 GND OUT
IN RIN 34 ILIM-
Q2 Q1 33 +IN -Vs -Vb GND 32
27 28 ILIM+ OUT 11-13 20-22 RP RLIM
33
RL
-Vs
Z2
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).
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
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.
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 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 1F capacitor.
This data sheet has been carefully CORPORATION * 5980 NORTH SHANNON ROAD is TUCSON, ARIZONA 85741 * USA * All specifications are subject to 1 (800) 546-2739 APEX MICROTECHNOLOGYchecked and is believed to be reliable, however, no responsibility * assumed for possible inaccuracies or omissions.APPLICATIONS HOTLINE:change without notice.
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MP108 REV B AUGUST 2004 (c) 2004 Apex Microtechnology Corp.

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