®
P r o d u c t I n n o v a t i o n F r o m
P r o d u c t n o v a t i o n F r o m
P
A
I
9
n
1
PA
P
9
A91
1
High Voltage Power Operational Amplifiers
FEATURES
DESCRIPTION
Theꢀ PA91ꢀ isꢀ aꢀ highꢀ voltage,ꢀ lowꢀ quiescentꢀ currentꢀ
MOSFETꢀoperationalꢀamplifierꢀdesignedꢀasꢀaꢀlowꢀcostꢀ
solutionꢀ forꢀ drivingꢀ continuousꢀ outputꢀ currentsꢀ upꢀ toꢀ
200mAꢀandꢀpulseꢀcurrentsꢀupꢀtoꢀ350mA.ꢀTheꢀsafeꢀoper-
atingꢀareaꢀ(SOA)ꢀhasꢀnoꢀsecondꢀbreakdownꢀlimitationsꢀ
andꢀ canꢀ beꢀ observedꢀ forꢀ allꢀ typeꢀ loadsꢀ byꢀ choosingꢀ
anꢀappropriateꢀcurrentꢀlimitingꢀresistor.ꢀTheꢀMOSFETꢀ
outputꢀstageꢀisꢀbiasedꢀABꢀforꢀlinearꢀoperation.ꢀExter-
nalꢀcompensationꢀprovidesꢀflexibilityꢀinꢀchoosingꢀband-
widthꢀandꢀslewꢀrateꢀforꢀtheꢀapplication.ꢀApexꢀPrecisionꢀ
Power’sꢀPowerꢀSIPꢀpackageꢀusesꢀaꢀminimumꢀofꢀboardꢀ
spaceꢀallowingꢀforꢀhighꢀdensityꢀcircuitꢀboards.ꢀTheꢀ12-
pinꢀPowerSIPꢀpackageꢀisꢀelectricallyꢀisolated.
♦ꢀHIGHꢀVOLTAGEꢀ—ꢀ450Vꢀ(±225V)
♦ꢀLOWꢀQUIESCENTꢀCURRENTꢀ—ꢀ10mAꢀ
♦ꢀHIGHꢀOUTPUTꢀCURRENTꢀ—ꢀ200mAꢀꢀ
♦ꢀPROGRAMMABLEꢀCURRENTꢀLIMIT
♦ꢀHIGHꢀSLEWꢀRATEꢀ—ꢀ300V/µs
APPLICATIONS
♦ꢀPIEZOELECTRICꢀPOSITIONING
♦ꢀHIGHꢀVOLTAGEꢀINSTRUMENTATION
♦ꢀELECTROSTATICꢀTRANSDUCERS
♦ꢀPROGRAMMABLEꢀPOWERꢀSUPPLIESꢀUPꢀ
TOꢀ440V
EQUIVALENT SCHEMATIC
12
11
+VS
R1 R2
C1
R3
Q3
R4
Q4
Q1
Q2
Q6
5
CC2
ILIM
9
4
Q5
Q14A
Q8
CC1
R7
10
Q14B
Q11
Q13
1
6
OUT
R6
R5
–IN
R8
R9
Q12
3
IQ
Q17
2
R10
+IN
Q16
R12
Q15
R11
–VS
7
8
EXTERNAL CONNECTIONS
11
1
2
3
4
5
6
7
8
9
10
12
12-pin SIP
PACKAGE
STYLE DP
R
C
c
c
*
RCL
–V
–IN +IN
s
*
Formedꢀleadsꢀavailable
SeeꢀpackageꢀstyleꢀEE
IQ
TO LOAD
AND FEEDBACK
+V
s
(See text.)
* Bypassing required.
Copyright © Cirrus Logic, Inc. 2010
(All Rights Reserved)
MAR 2010
1
APEX − PA91UREVI
PA91U
www.cirrus.com