PA243 Datasheet, PDF (1/6 Pages) Cirrus Logic – HIGH VOLTAGE POWER OPERATIONAL AMPLIFIER

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PAP2A42433
High Voltage Power Operational Amplifier
FEATURES
• RoHS COMPLIANT
• SURFACE MOUNT PACKAGE
• MONOLITHIC MOS TECHNOLOGY
• LOW COST
• HIGH VOLTAGE OPERATION—350V
• LOW QUIESCENT CURRENT TYP.—2.2mA
• NO SECOND BREAKDOWN
• HIGH OUTPUT CURRENT—120 mA PEAK
APPLICATIONS
• TELEPHONE RING GENERATOR
• PIEZO ELECTRIC POSITIONING
• ELECTROSTATIC TRANSDUCER & DEFLECTION
• DEFORMABLE MIRROR FOCUSING
DESCRIPTION
The PA243 is a dual high voltage monolithic MOSFET op-
erational amplifier achieving performance features previously
found only in hybrid designs while increasing reliability. This
approach provides a cost-effective solution to applications
where multiple amplifiers are required. Inputs are protected
from excessive common mode and differential mode volt-
ages. The safe operating area (SOA) has no secondary
breakdown limitations 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 PA243DF is packaged in a 24 pin PSOP (JEDEC
MO-166) package. The heatslug of the PA243DF package is
isolated in excess of full supply voltage.
TYPICAL APPLICATION
R
20R
VIN
+175
20R
20R
+175
10pF
10pF
A
B
PA243 _{R CL}
R _CL ^PA243
R_N
PIEZO
47 _TRANSDUCER 47
C_N
–175
–175
Low Cost 660v _p-p Piezo Drive
A single PA243 amplifier operates as a bridge driver for a piezo
transducer providing a low cost 660 volt total drive capability.
The R_N C_N network serves to raise the apparent gain of A2 at
high frequencies. If R_N is set equal to R the amplifiers can be
compensated identically and will have matching bandwidths.
See application note 20 for more details.
24-pin PSOP
PACKAGE STYLE DF
EQUIVALENT SCHEMATIC (one of two channels)
+VS
Q1
Q2
CC1
CC2
+IN
-IN
Q7
D1
Q8
D4
Q3
Q5 Q6
Q10
Q9
Q4
ILIM
OUT
D2 _Q11
D3
Q13
Q12
Q14
Q15
D5
EXTERNAL CONNECTIONS
+Vsa
1
NC
La
COMPa
R_CL
COMPa
C_C
OUTa
NC
-INb
+INb
24
+
A
-
B
-Vsb
-VS
-Vsa
*
NC
NC
+INa
-INa
NC
OUTb
COMPb
COMPb
R_CL
ILb
C_C
NC
+Vsb
*
For C_C values, see graph on page 3.
Note: C_C must be rated for full supply voltage.
* Supply bypassing required. See general Operating Con-
siderations.
PA24_h3_tU_{tp://www.cirrus.com}
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
MAY 2009₁
APEX − PA243UREVG