APEX MP108A

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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
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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.
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EQUIVALENT CIRCUIT DIAGRAM
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EXTERNAL CONNECTIONS
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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.
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INKJET NOZZLE DRIVE
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APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected]
1
MP108 • MP108A
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
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
225°C.
150°C.
-40 to 105°C.
-40 to 85°C.
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
1011
4
1MHz bandwidth, 1kΩ RS
92
96
45
MAX
+VB - 15
-VB + 15
10
Full temperature range, f ≤ 60Hz
Full temperature range, f < 60Hz
Full temperature range
-40
±75
50
*
*
*
*
±100
65
1
1.25
13
85
MP108A
TYP
MAX
*
*
*
10
+VS - 10 +VS - 8.6
-VS + 10 -VS + 7
+VS - 1.6
-VS + 5.1
10
CC = 10pF
150
170
2V Step
1
No load, DC
5
CC = 10pF, +VS = 100V, -VS = -100V
300
±15
MIN
5
50
20
100
0.1
50
IO = 10A
IO = -10A
IO = 10A, +VB = +VS +10V
IO = -10A, -VB = -VS -10V
POWER SUPPLY
VOLTAGE
CURRENT, quiescent
THERMAL
RESISTANCE, AC, junction to case5
RESISTANCE, DC, junction to case
RESISTANCE, junction to air
TEMPERATURE RANGE, case
MP108
TYP
1
20
Full temperature range
GAIN
OPEN LOOP @ 15Hz
RL = 10KΩ, CC = 10pF
GAIN BANDWIDTH PRODUCT @ 1MHz CC = 10pF
PHASE MARGIN
Full temperature range
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
MIN
*
*
*
*
*
*
*
*
mV
µV/°C
µV/V
pA
pA/V
pA
Ω
pF
V
V
dB
µV RMS
dB
MHz
degrees
*
*
*
*
*
11
*
*
3
*
*
70
*
30
UNITS
V
V
V
V
A
V/µS
µS
Ω
kHz
*
*
*
*
*
*
V
mA
*
*
*
*
°C/W
°C/W
°C/W
°C
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
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TYPICAL PERFORMANCE
GRAPHS
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MP108 • MP108A
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APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected]
3
MP108 • MP108A
OPERATING
CONSIDERATIONS
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.
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.
parasitic oscillation in the output stage of the MP108. 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 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.
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SAFE OPERATING AREA
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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.
FIGURE 1
OVERVOLTAGE PROTECTION
COMPENSATION
CURRENT LIMIT
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).
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 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.
POWER SUPPLY BYPASSING
Bypass capacitors to power supply terminals +VS and -VS
must be connected physically close to the pins to prevent local
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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 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 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 1µF capacitor.
This data
sheet has been carefully CORPORATION
checked and is believed
to be reliable,
no responsibility
assumed forARIZONA
possible inaccuracies
All specifications are
subject to change
without
notice.
APEX
MICROTECHNOLOGY
• 5980
NORTHhowever,
SHANNON
ROAD • isTUCSON,
85741 •or omissions.
USA • APPLICATIONS
HOTLINE:
1 (800)
546-2739
4
MP108 REV C JANUARY 2005 © 2005 Apex Microtechnology Corp.