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

PA240

PA240U

1

PA240

FEATURES

•RoHSCOMPLIANT

•MONOLITHICMOSTECHNOLOGY

•LOWCOST

•HIGHVOLTAGEOPERATION—350V

•LOWQUIESCENTCURRENTTYP.—2.2mA

•NOSECONDBREAKDOWN

•HIGHOUTPUTCURRENT—120mAPEAK

APPLICATIONS

•TELEPHONERINGGENERATOR

•PIEZOELECTRICPOSITIONING

•ELECTROSTATICTRANSDUCER&DEFLECTION

•DEFORMABLEMIRRORFOCUSING

•PACKAGINGOPTIONS

7TO-220withstaggeredLeadForm(PA240CX)

7DDPAKSurfaceMountPackage(PA240CC)

DESCRIPTION

The PA240 is a high voltage monolithic MOSFET operational

amplifier achieving 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

limitations. External compensation provides the user flexibility

in choosing optimum gain and bandwidth for the application.

The PA240 is packaged in two standard package designs.

The surface mount version of the PA240, the PA240CC,

is an industry standard non-hermetic plastic 7-pin DDPAK.

The through hole version of the PA240, the PA240CX, is an

industry standard non-hermetic plastic 7-pin TO-220 package.

The PA240CX is a staggered lead formed option that offers

industry standard 100 mil spacing. This allows for easier PC

board layout. (Please refer to package drawings for outline

dimensions.)

EQUIVALENTSCHEMATIC

A1

PA240

A2

PA240

20R

PIEZO

TRANSDUCER

20R

20R

R

–175

+175

–175

+175

10pF

10pF

LOW COST 660V p-p

PIEZO DRIVE

EXTERNALCONNECTIONS

PA240CC

PA240CX

A

A

For CC values, see graph on page 3.

Note: CC must be rated for full supply voltage.

DDPAK

PKG.STYLECC

TO-220

STAGGEREDLEADS

PKG.STYLECX

–IN

+V

S

–V

S

+IN

D2

D3 D4

D5

Q5

Q4

1

2

4

5

3

Q1

Q11

Q12

D1

Q2

Q6

Q8

Q13

SUB

Q14

Q10

Q3

I

OUT

COMP

COMP

6

7

High voltage considerations should be taken when designing

board layouts for the PA240.The PA240 may require a derate in

supply voltage depending on the spacing used for board layout.

The 15-mil and 14-mil minimum spacing of the 7 TO-220 and

7 DDPAK respectively is adequate to standoff the 350V rating

of the PA240. However, a supply voltage derate to 250V is

required if the spacing of circuit board artwork is less than 11

mils. In cases where the PA240 is used to its maximum voltage

rating, the PA240CX is recommended given that the staggered

lead form allows for 100-mil standard spacing.

The metal tabs of both the PA240CC and PA240CX pack-

ages are directly tied to -Vs.

TYPICALAPPLICATON

Reference Application Notes 3, 20 and 25

High Voltage Power Operational Amplifier

PA240

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)

http://www.cirrus.com

MAY 2009

APEX − PA240UREVF