鈥?/div>
PIEZOELECTRIC POSITIONING
HIGH VOLTAGE INSTRUMENTATION
ELECTROSTATIC TRANSDUCERS
PROGRAMMABLE POWER SUPPLIES UP TO 440V
TYPICAL APPLICATION
DESCRIPTION
The PA15 is a high voltage, low quiescent current MOSFET
operational amplifier designed as a low cost solution for driving
continuous output currents up to 200mA and pulse currents up
to 350mA into capacitive loads. The safe operating area (SOA)
has no second breakdown limitations and can be observed for
all type loads by choosing an appropriate current limiting
resistor. The MOSFET input stage has integrated static and
differential mode protection. The MOSFET output stage is
biased AB for linear operation. External compensation pro-
vides flexibility in choosing bandwidth and slew rate for the
application. The 10-pin power SIP package is electrically
isolated.
+V
S
R
F
R
IN
1
6
PIEZO DRIVE
PA15
10
V
OUT
COMPUTER
FOCUS
COMMAND
VOLTAGE
2
5
7
R
CL
鈥揤
S
EQUIVALENT SCHEMATIC
6
+V
S
R1 R2
C1
R3
LOW POWER, PIEZOELECTRIC POSITIONING
Piezo positioning may be applied to the focusing of seg-
mented mirror systems. The composite mirror may be com-
posed of hundreds of elements, each requiring focusing under
computer control. In such complex systems the PA15 reduces
the costs of power supplies and cooling with its advantages of
low cost and low quiescent power consumption while increas-
ing circuit density with the SIP package.
Q1
Q6
Q5
Q2
8
CC2
Q3
R4
Q4
ILIM
7
R7
Q11
10
OUT
Q12
Q13
9
CC1
Q8
EXTERNAL CONNECTIONS
1
2
3
NC
4
NC
5
鈥揤
S
6
7
+V
S
I
LIM
PACKAGE: SIP 02
8
R
C
9
C
C2
C
C1
10
OUT
1
鈥揑N
R5
R8
R9
R6
鈥揑N
2
+IN
Q15
R11
鈥揤
S
5
R12
Q14
R10
Q16
+IN
C
C
R
CL
PHASE COMPENSATION
GAIN
鈮?/div>
1
鈮?/div>
10
C
C
33pf
OPEN
R
CL
=
.6
I
CL
R
C
1K鈩?/div>
OPEN
APEX MICROTECHNOLOGY CORPORATION
鈥?TELEPHONE (520) 690-8600 鈥?FAX (520) 888-3329 鈥?ORDERS (520) 690-8601 鈥?EMAIL prodlit@apexmicrotech.com
1
2
3
4
