APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
1
FEATURES
• HIGH VOLTAGE — 450V (±225V)
• LOW COST
• LOW QUIESCENT CURRENT — 3.0mA MAX
• HIGH OUTPUT CURRENT — 200mA
• PROGRAMMABLE CURRENT LIMIT
APPLICATIONS
• PIEZOELECTRIC POSITIONING
• HIGH VOLTAGE INSTRUMENTATION
• ELECTROSTATIC TRANSDUCERS
• PROGRAMMABLE POWER SUPPLIES UP TO 440V
DESCRIPTION
The PA15FL is a high voltage, low quiescent current MOSFET
operational amplier 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 exibility
in choosing bandwidth and slew rate for the application. The
10-pin power SIP package is electrically isolated.
EQUIVALENT SCHEMATIC
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PA15FL • PA15FLA
TYPICAL APPLICATION
LOW POWER, PIEZOELECTRIC POSITIONING
Piezo positioning may be applied to the focusing of segment-
ed 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.
EXTERNAL CONNECTIONS
PHASECOMPENSATION
GAIN CC RC
≥ 1 33pf 1KΩ
≥ 10 OPEN OPEN
.6
RCL ≅
ICL
10-PIN SIP
PACKAGE STYLE FL
Formed leads available
See package style FU
APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
2
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS SUPPLY VOLTAGE, +VS to –VS 450V
OUTPUT CURRENT, source, sink See SOA
POWER DISSIPATION, continuous @ TC = 25°C 30W
INPUT VOLTAGE, differential ±25V
INPUT VOLTAGE, common mode ±VS
TEMPERATURE, pin solder - 10s max 260°C
TEMPERATURE, junction2 150°C
TEMPERATURE RANGE, storage –40 to +85°C
OPERATING TEMPERATURE RANGE, case –25 to +85°C
PA15FL • PA15FLA
SPECIFICATIONS
PA15FL PA15FLA
PARAMETER TESTCONDITIONS 1 MIN TYP MAX MIN TYP MAX UNITS
INPUT
OFFSET VOLTAGE, initial 2 10 .5 3 mV
OFFSET VOLTAGE, vs. temperature Full temperature range 15 50 5 20 µV/°C
OFFSET VOLTAGE, vs. supply 10 50 * * µV/V
OFFSET VOLTAGE, vs. time 75 * µV/√kh
BIAS CURRENT, initial 200 2000 * * pA
BIAS CURRENT, vs. supply 4 * pA/V
OFFSET CURRENT, initial 50 500 30 200 pA
INPUT IMPEDANCE, DC 1011 * Ω
INPUT CAPACITANCE 4 * pF
COMMON MODE VOLTAGE RANGE3 ±VS–15 * V
COMMON MODE REJECTION, DC VCM = ±90V 80 98 * * dB
NOISE 10KHz BW, RS = 1KΩ, CC = OPEN 2 * µVrms
GAIN
OPEN LOOP, @ 15Hz RL = 2KΩ, CC = OPEN 94 111 * * dB
GAIN BANDWIDTH PRODUCT at 1MHz RL = 2KΩ, CC = OPEN 5.8 * MHz
POWER BANDWIDTH RL = 2KΩ, CC = OPEN 24 * kHz
PHASE MARGIN Full temperature range 60 * °
OUTPUT
VOLTAGE SWING3 IO = ±200mA ±VS–15 ±VS–10 * * V
CURRENT, continuous ±200 * mA
SLEW RATE, AV = 100 CC = OPEN 20 20 30 V/µs
CAPACITIVE LOAD, AV = +1 Full temperature range 100 * pf
SETTLING TIME to .1% CC = OPEN, 2V step 2 * µs
RESISTANCE, no load 50 * Ω
POWERSUPPLY
VOLTAGE5 See note 5 ±50 ±150 ±225 * * * V
CURRENT, quiescent, 2.0 3.0 * * mA
THERMAL
RESISTANCE, AC, junction to case 4 Full temperature range, F > 60Hz 2.5 * °C/W
RESISTANCE, DC, junction to case Full temperature range, F < 60Hz 4.2 * °C/W
RESISTANCE, junction to air Full temperature range 30 * °C/W
TEMPERATURE RANGE , Case Meets full range specications –25 +85 * * °C
NOTES: * The specication of PA15FLA is identical to the specication for PA15FL in applicable column to the left.
1. Unless otherwise noted: TC = 25°C, compensation = CC = 33pF, RC = 1KΩ, RCL = 0. DC input specications 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.
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
3
TYPICAL PERFORMANCE
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APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
4
OPERATING
CONSIDERATIONS
PA15FL • PA15FLA
GENERAL
Please read Application Note 1 "General Operating Con-
siderations" which covers stability, supplies, heat sinking,
mounting, current limit, SOA interpretation, and specication
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.
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 ampli-
er 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.
INPUT PROTECTION
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 sufcient
(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 volt-
age will be clamped to ±1.4V. This is sufcient overdrive to
produce maximum power bandwidth.
POWER SUPPLY PROTECTION
Unidirectional zener diode transient suppressors are recom-
mended 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 amplier as possible.
STABILITY
The PA15FL has sufcient phase margin to be stable with
most capacitive loads at a gain of 10 or more, using the rec-
ommended 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 amplier pins 8 and 9 to avoid
spurious oscillation.
FIGURE2.OVERVOLTAGEPROTECTION
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This data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. All specifications are subject to change without notice.
PA15FLU REV B FEBRUARY 2007 © 2007 Apex Microtechnology Corp.
