PA98 • PA98A

PA98U

1

P r o d u c t I n n o v a t i o n F r o m

PA98, PA98A

FEATURES

♦ HIGH VOLTAGE — 450V (±225V)

♦ HIGH SLEW RATE — 1000V/μS

♦ HIGH OUTPUT CURRENT — 200mA

APPLICATIONS

♦HIGHVOLTAGEINSTRUMENTATION

♦PIEZOTRANSDUCEREXCITATION

♦PROGRAMMABLEPOWERSUPPLIESUP

TO 430V

♦ELECTROSTATICTRANSDUCERS&

DEFLECTION

9

6

12

11

7

2

1

5

4

COMP

OUT

+V

S

+V

S

–V

S

–V

S

C

10

C

L

L

8

Q1

Q2

Q3

Q8

Q9

Q6

Q7

Q12

Q10A

Q10B

Q11

Q17

Q13

Q15

Q18

D1

D23

D2

–IN

+IN

Power Operational Amplifiers

PA98 • PA98A

P r o d u c t I n n o v a t i o n F r o m

DESCRIPTION

The PA98 is a high voltage, high power bandwidth

MOSFET operational amplifier designed for output

currentsupto200mA.Outputvoltagescanswingup

to±215Vwithadualsupplyandupto+440voltswith

a single supply.The safe operating area (SOA) has

no second breakdown limitations and can be observed

withalltypesofloadsbychoosinganappropriatecur-

rentlimitingresistor.Highaccuracyisachievedwitha

cascodeinputcircuitconfiguration.Allinternalbiasing

isreferencedtoabootstrappedzener-MOSFETcur-

rentsource.Asaresult,thePA98featuresanunprec-

edentedsupplyrangeandexcellentsupplyrejection.

TheMOSFEToutputstageisbiasedonforlinearoper-

ation.Externalcompensationprovidesuserflexibility.

Thishybridcircuitutilizesthickfilm(cermet)resistors,

ceramiccapacitorsandsiliconsemiconductorchipsto

maximizereliability,minimizesizeandgivetopperfor-

mance.Ultrasonicallybondedaluminumwiresprovide

reliableinterconnectionsatalloperatingtemperatures.

ThePowerSIPpackageiselectricallyisolated.

EQUIVALENT SCHEMATIC

Copyright © Cirrus Logic, Inc. 2009

(All Rights Reserved)

www.cirrus.com

NOV 2009

APEX − PA98REVK