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PA243 Datasheet(PDF) 1 Page - Cirrus Logic

Part No. PA243
Description  HIGH VOLTAGE POWER OPERATIONAL AMPLIFIER
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Maker  APEX [Cirrus Logic]
Homepage  http://www.cirrus.com
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PA243 Datasheet(HTML) 1 Page - Cirrus Logic

   
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APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com

24-PIN PSOP
PACKAGE STYLE DF
EQUIVALENT SCHEMATIC (ONE OF TwO cHANNELS)
EXTERNAL CONNECTIONS
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.
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—20 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
Low Cost 660v p-p piezo Drive
AsinglePA243amplifieroperatesasabridgedriverforapiezo
transducer providing a low cost 660 volt total drive capability.
The R
N CN 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.
A
PA243
B
PA243
20R
PIEZO
TRANSDUCER
20R
RN
20R
CN
R
VIN
–175
+175
–175
+175
R CL
R CL
180
180
10pF
10pF
W
ILIM
OUT
-IN
+IN
+VS
-VS
CC2
CC1
Q2
D4
Q11
Q7
Q1
Q15
Q12
Q5
Q9
Q14
Q13
Q10
Q6
Q4
Q3
Q8
D2
D3
D1
D5
CC
*
*
*
*
CC
RCL
RCL
+Vsa
NC
La
COMPa
COMPa
OUTa
NC
-INb
+INb
-Vsb
-Vsa
NC
NC
+INa
-INa
NC
OUTb
COMPb
COMPb
ILb
NC
+Vsb
24
1
+
-
A
B


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