PA241

PA241U

1

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

PA241

FEATURES

•RoHSCOMPLIANT

•MONOLITHICMOSTECHNOLOGY

•LOWCOST

•HIGHVOLTAGEOPERATION—350V

•LOWQUIESCENTCURRENTTYP.—2.2mA

•NOSECONDBREAKDOWN

•HIGHOUTPUTCURRENT—120mAPEAK

•AVAILABLEINDIEFORM—CPA241

APPLICATIONS

•PIEZOELECTRICPOSITIONING

•ELECTROSTATICTRANSDUCER&DEFLECTION

•DEFORMABLEMIRRORFOCUSING

•BIOCHEMISTRYSTIMULATORS

•COMPUTERTOVACUUMTUBEINTERFACE

DESCRIPTION

The PA241 is a high voltage monolithic MOSFET operational

amplifier which achieves performance features previously

found only in hybrid designs while increasing reliability. Inputs

are protected from excessive common mode and differential

mode voltages.The safe operating area (SOA) has no second

breakdown limitation and can be observed with all type loads

by choosing an appropriate current limiting resistor. External

compensation provides the user flexibility in choosing optimum

gain and bandwidth for the application.

The PA241CE is packaged in a hermetically sealed 8-pin

TO-3 package. The metal case of the PA241CE is isolated in

excess of full supply voltage.

The PA241DF is packaged in a 24 pin PSOP (JEDEC MO-

166) package. The metal heat slug of the PA241DF is isolated

in excess of full supply voltage.

The PA241DW is packaged in Apex Precision Power’s her-

metic ceramic SIP package. The alumina ceramic isolates the

die in excess of full supply voltage.

EQUIVALENTSCHEMATIC

20R

PIEZO

TRANSDUCER

20R

Rn

20R

Cn

R

–175

+175

–175

+175

47

47

10pF

10pF

A1

PA241

A2

PA241

LOW COST 660V p-p

PIEZO DRIVE

Two PA241 amplifiers operated as a bridge driver for a piezo

transducer provides a low cost 660 volt total drive capability.

The R

high frequencies. If R

compensated identically and will have matching bandwidths.

EXTERNALCONNECTIONS

1

4

5

6

7

3

2

8

9 10

+IN

-IN

PA241DW

TOP VIEW

1

2

3

4

5

6

7

8

OUT

–IN

+IN

NOTE: PA241CE Recommended mounting torque is 4-7

in•lbs (.45 -.79 N•m)

CAUTION: The use of compressible, thermally conductive

insulators may void warranty.

PA241CE

8-PINTO-3

24-PINPSOP

10-PINSIP

PACKAGESTYLECE

PACKAGESTYLEDF

PACKAGESTYLEDW

OUT

-IN

+IN

TYPICALAPPLICATION

Ref:APPLICATION NOTE 20: "Bridge Mode Operation of Power Amplifiers"

C

C

R

CL

NC

NC

NC

NC

-IN

NC

+IN

NC

NC

NC

NC

-VS

NC

NC

NC

OUT

NC

COMP

NC

COMP

NC

ILIM

NC

+VS

24

1

PA241DF

For CC values, see graph on page 4.

Note: CC must be rated for full supply

voltage.

High Voltage Power Operational Amplifier

PA241

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

Copyright © Cirrus Logic, Inc. 2009

(All Rights Reserved)

www.cirrus.com

DEC 2009

APEX − PA241UREVI