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

FEATURES

• HIGH VOLTAGE — 450V (

±225V)

• LOW COST

• LOW QUIESCENT CURRENT — 3.0mA MAX

• HIGH OUTPUT CURRENT — 200mA

• PROGRAMMABLE CURRENT LIMIT

APPLICATIONS

• PIEZOELECTRIC POSITIONING

• HIGH VOLTAGE INSTRUMENTATION

• ELECTROSTATIC TRANSDUCERS

• PROGRAMMABLE POWER SUPPLIES UP TO 440V

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.

EQUIVALENT SCHEMATIC

Q1

Q2

6

1

2

5

9

8

10

7

R1 R2

C1

R3

Q3

CC1

CC2

Q6

Q5

R5

R8

R9

Q15

R11

R12

Q16

Q12

Q8

R4

R7

Q4

ILIM

OUT

Q14

R10

Q13

Q11

–IN

+IN

R6

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.

EXTERNAL CONNECTIONS

PACKAGE: SIP 02

F

R

PA15

IN

R

PIEZO DRIVE

S

–V

S

+V

OUT

V

COMPUTER

FOCUS

COMMAND

VOLTAGE

CL

R

10

7

5

2

1

6

1

2

3

4

56

78

9

10

–IN

+IN

NC

–V

+V

OUT

NC

SS

PHASE COMPENSATION

GAIN

≥ 1

33pf

1K

Ω

≥ 10

OPEN

OPEN

.6

HTTP://WWW.APEXMICROTECH.COM

(800) 546-APEX

(800) 546-2739

MICROTECHNOLOGY

HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS

PA15 • PA15A

TYPICAL APPLICATION