APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com

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FEATURES

• HIGH VOLTAGE — 400V (±200V)

• LOW QUIESCENT CURRENT — 10mA

• HIGH OUTPUT CURRENT — 4A

• PROGRAMMABLE CURRENT LIMIT

APPLICATIONS

• PIEZOELECTRIC POSITIONING

• HIGH VOLTAGE INSTRUMENTATION

• ELECTROSTATIC TRANSDUCERS

• PROGRAMMABLE POWER SUPPLIES UP TO 390V

DESCRIPTION

The PA92 is a high voltage, low quiescent current MOSFET

operational amplifier designed as a low cost solution for driving

continuous output currents up to 4A and pulse currents up to

7A. 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 compensation

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

Power SIP package is electrically isolated.

EQUIVALENT SCHEMATIC

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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 PA92 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.

PHASE COMPENSATION

GAIN

CC*

RC

≥1

150pF

100Ω

≥2

100pF

100Ω

≥3

47pF

0Ω

≥12

10pF

0Ω

*CC Never to be <10pF. CC to be rated for the full supply

voltage +V to -Vs. Use ceramic NPO (COG) type.

EXTERNAL CONNECTIONS

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PATENTED

12-PIN SIP

PACKAGE STYLE DP

Formed leads availablewith

package styles ED & EE