PA94 Datasheet, PDF (1/4 Pages) Cirrus Logic – HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS

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FEATURES
• HIGH VOLTAGE — 900V (±450V)
• HIGH SLEW RATE — 500V/µS
• HIGH OUTPUT CURRENT — 100mA
• PROGRAMMABLE CURRENT LIMIT
APPLICATIONS
• HIGH VOLTAGE INSTRUMENTATION
• PROGRAMMABLE POWER SUPPLIES UP TO ±430V
• MASS SPECTROMETERS
• SEMICONDUCTOR MEASUREMENT EQUIPMENT
DESCRIPTION
The PA94 is a high voltage, MOSFET operational amplifier
designed as a low cost solution for driving continuous output
currents up to 100mA and pulse currents up to 200mA into
capacitive loads. The safe operating area (SOA) has no sec-
ond breakdown limitations and can be observed for all load
types by choosing an appropriate current limiting resistor.
The MOSFET output stage is biased AB for linear operation.
External compensation provides flexibility in choosing band-
width 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. Isolating thermal washers (TW13) prevent arcing
from pins to heatsink.
EQUIVALENT SCHEMATIC
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PATENTED
8-PIN SIP
PACKAGE STYLE DQ
Formed leads available
See package styles EC & EP
TYPICAL APPLICATION
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 PA94 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.
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EXTERNAL CONNECTIONS
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PHASE COMPENSATION
GAIN
≥100
C_C
2.2pF
≥50
4.7pF
≥10
22pF
C_C rated for full supply voltage.
R_LIM =
.7
I_LIM
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE [phone] • FAX [phone] • ORDERS [phone] • EMAIL [e-mail]
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