PA241
II nn nn o v a t ii oo nn FF rr oo mm
PP rr oo dd Puu ccAtt 241
PA241
High Voltage Power Operational Amplifier
FEATURES
•ꢀRoHSꢀCOMPLIANT
•ꢀMONOLITHICꢀMOSꢀTECHNOLOGY
•ꢀLOWꢀCOST
•ꢀHIGHꢀVOLTAGEꢀOPERATION—350V
•ꢀLOWꢀQUIESCENTꢀCURRENTꢀTYP.—2.2mA
•ꢀNOꢀSECONDꢀBREAKDOWN
•ꢀHIGHꢀOUTPUTꢀCURRENT—120mAꢀPEAK
•ꢀAVAILABLEꢀINꢀDIEꢀFORM—CPA241
ꢀ
8-PINꢀTO-3ꢀ
24-PINꢀPSOPꢀ
10-PINꢀSIP
ꢀPACKAGEꢀSTYLEꢀCEꢀ
PACKAGEꢀSTYLEꢀDFꢀ
PACKAGEꢀSTYLEꢀDW
APPLICATIONS
•ꢀPIEZOꢀELECTRICꢀPOSITIONING
•ꢀELECTROSTATICꢀTRANSDUCERꢀ&ꢀDEFLECTION
•ꢀDEFORMABLEꢀMIRRORꢀFOCUSING
•ꢀBIOCHEMISTRYꢀSTIMULATORS
TYPICALꢀAPPLICATION
Ref:APPLICATION NOTE 20:"Bridge Mode Operation of PowerAmplifiers"
20R
+175
R
20R
20R
+175
VIN
•ꢀCOMPUTERꢀTOꢀVACUUMꢀTUBEꢀINTERFACE
10pF
10pF
DESCRIPTION
A1
PA241
A2
PA241
ThePA241isahighvoltagemonolithicMOSFEToperational
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
compensationprovidestheuserflexibilityinchoosingoptimum
gain and bandwidth for the application.
Rn
Cn
RCL
47
RCL
47
PIEZO
TRANSDUCER
LOW COST 660V p-p
PIEZO DRIVE
–175
–175
Two PA241 amplifiers operated as a bridge driver for a piezo
transducer provides a low cost 660 volt total drive capability.
The RN CN network serves to raise the apparent gain of A2 at
high frequencies. If RN is set equal to R the amplifiers can be
compensated identically and will have matching bandwidths.
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.
EXTERNALꢀCONNECTIONS
PA241CE
PA241DW
RCL
1
2
3
4
5
6
7
8
9
10
CC
CC2
NC NC -VS +VS
ILIM CC2 CC1 OUT
2
3
CC1
4
CC
1
ILIM
-IN +IN
OUT
RCL
TOP VIEW
For CC values, see graph on page 4.
Note: CC must be rated for full supply
voltage.
EQUIVALENTꢀSCHEMATIC
5
–IN
8
+VS
+VS
6
7
–VS
+IN
PA241DF
NC
NC
NC
NC
NC
-IN
CC1
CC2
1
24
NC
NC
ILIM
OUT
+IN
NC
-
COMP
NC
+IN
NC
NC
NC
NC
-VS
-IN
OUT
+
NC
CC
RCL
COMP
NC
ILIM
NC
+VS
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.
-VS
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
DEC 2009
1
APEX − PA241UREVI
PA241U
www.cirrus.com
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