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FEATURES
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•
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HIGH VOLTAGE — 450V (±225V)
LOW QUIESCENT CURRENT — 10mA
HIGH OUTPUT CURRENT — 200mA
PROGRAMMABLE CURRENT LIMIT
HIGH SLEW RATE — 300V/µs
APPLICATIONS
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PIEZOELECTRIC POSITIONING
HIGH VOLTAGE INSTRUMENTATION
ELECTROSTATIC TRANSDUCERS
PROGRAMMABLE POWER SUPPLIES UP TO 440V
12-PIN SIP
PACKAGE STYLE DP
Formed leads available
with package styles ED & EE
TYPICAL APPLICATION
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DESCRIPTION
The PA91 is a high voltage, low quiescent current MOSFET
operational amplifier designed as a low cost solution for driving
continuous output currents up to 200mA and pulse currents
up to 350mA. 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
output stage is biased AB for linear operation. External com-
pensation provides flexibility in choosing bandwidth and slew
rate for the application. APEX’s Power SIP package uses a
minimum of board space allowing for high density circuit boards.
The 12-pin PowerSIP package is electrically isolated.
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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 PA91 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.
EQUIVALENT SCHEMATIC
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PHASE COMPENSATION
GAIN
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C
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R
C
≥1
68pF
100Ω
≥5
10pF
100Ω
≥10
4.7pF
0Ω
≥30
NONE
0Ω
*C
C
To be rated for the full supply voltage +V to –Vs. Use NPO
ceramic (COG) type.
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EXTERNAL CONNECTIONS
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APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
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APEX [ CIRRUS LOGIC ]
