鈥?/div>
RoHS COMPLIANT
SURFACE MOUNT PACKAGE
MONOLITHIC MOS TECHNOLOGY
LOW COST
HIGH VOLTAGE OPERATION鈥?50V
LOW QUIESCENT CURRENT TYP.鈥?.2mA
NO SECOND BREAKDOWN
HIGH OUTPUT CURRENT鈥?20 mA PEAK
TELEPHONE RING GENERATOR
PIEZO ELECTRIC POSITIONING
ELECTROSTATIC TRANSDUCER & DEFLECTION
DEFORMABLE MIRROR FOCUSING
APPLICATIONS
24-PIN PSOP
PACKAGE STYLE DF
EQUIVALENT SCHEMATIC
(ONE OF TwO cHANNELS)
+V
S
Q1
C
C
1
C
C
2
+IN
-IN
D1
D2
Q11
Q7
Q8
Q9
Q10
Q5
Q6
Q2
Q3
Q4
I
LIM
OUT
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.
D4
D3
Q13
Q12
Q15
D5
-V
S
Q14
TYPICAL APPLICATION
R
VIN
20R
+175
10pF
B
PA243
R
CL
C
C
20R
20R
+175
10pF
EXTERNAL CONNECTIONS
*
+Vsa
NC
La
COMPa
COMPa
OUTa
NC
+INb
-INb
1
+
-
24
A
-
-Vsa
NC
NC
+INa
-INa
NC
OUTb
COMPb
COMPb
ILb
NC
+Vsb
*
A
PA243
R
CL
鈥?75
鈥?75
*
-Vsb
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.
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.
APEX MICROTECHNOLOGY CORPORATION
鈥?TELEPHONE (520) 690-8600 鈥?FAX (520) 888-3329 鈥?ORDERS (520) 690-8601 鈥?EMAIL prodlit@apexmicrotech.com
+
PIEZO
180 TRANSDUCER 180
W
R
CL
R
N
C
N
B
R
CL
C
C
*
1
2
3
4
5
