Apex PA91 Datasheet

HIGH VOLTAGE POWER OPERATIONAL AMPLIFIER

MICROTECHNOLOGY

HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX [phone]

FEATURES

• HIGH VOLTAGE — 450V (±225V)

• LOW QUIESCENT CURRENT — 10mA

• HIGH OUTPUT CURRENT — 200mA

• PROGRAMMABLE CURRENT LIMIT

• HIGH SLEW RATE — 300V/µs

APPLICATIONS

• PIEZOELECTRIC POSITIONING

• HIGH VOLTAGE INSTRUMENTATION

• ELECTROSTATIC TRANSDUCERS

• PROGRAMMABLE POWER SUPPLIES UP TO 440V

DESCRIPTION

The PA91 is a high voltage, low quiescent current MOSFET
operational amplifier designed for driving continuous output
currents up to 200mA and pulse currents up to 350mA. 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 output
stage is biased AB for linear operation. External compensation
provides flexibility in choosing bandwidth and slew rate for the
application. APEX’s Power SIP package uses a minimum of
board space allowing for high density circuit boards.

EQUIVALENT SCHEMATIC

12
11

+V

S

R1 R2 C1 R3

PA91

TYPICAL APPLICATION

R

F

+V

S

R

IN

COMPUTER

FOCUS

COMMAND

VOLTAGE

LOW POWER, PIEZOELECTRIC POSITIONING

Piezo positioning may be applied to the focusing of seg­mented mirror systems. The composite mirror may be com­posed of hundreds of elements, each requiring focusing under
computer control. In such complex systems the PA91 reduces
the costs of power supplies and cooling with its advantages of
low cost and low quiescent power consumption while increas­ing circuit density with the SIP package.

11,12

1

PA91

2

9,10

R

–V

7,8

S

6

CL

PIEZO DRIVE

V

OUT

Q1 Q2

Q6

Q5

1

R5

–IN

R8 R9

2

+IN

Q15

–V

S

7
8

APEX MICROTECHNOLOGY CORPORATION • TELEPHONE [phone] • FAX [phone] • ORDERS [phone] • EMAIL [e-mail]

R11 R12

4

CC1

5

CC2

R6

Q3

Q8

Q11

Q13

Q12

3
I

Q

Q16

R4

R10

R7

Q4
ILIM

10

OUT

Q14

PHASE COMPENSATION

GAIN

≥1 68pF

9

*C

6

c

+V to –Vs. Use NPO ceramic (COG) type.

≥5
≥10
≥30

To be rated for the full supply voltage

EXTERNAL CONNECTIONS

12345678910

–IN +IN

I

Q

(See text.)

R

c

10pF

4.7pF

NONE

AND FEEDBACK

Cc*R

100Ω
100Ω

C

c

TO LOAD

0Ω
0Ω

c

R

CL

Package: SIP03

–V

s

*

* Bypassing required.

+V

11

12

*

s

PA91

ABSOLUTE MAXIMUM RATINGS

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

SUPPLY VOLTAGE, +VS to –V
OUTPUT CURRENT, source, sink, peak 350mA, within SOA

S

450V

POWER DISSIPATION, continuous @ TC = 25°C 30W
INPUT VOLTAGE, differential ±20V
INPUT VOLTAGE, common mode ±V
TEMPERATURE, pin solder - 10s max 220°C
TEMPERATURE, junction

2

S

150°C
TEMPERATURE, storage –65 to +150°C
OPERATING TEMPERATURE RANGE, case –55 to +125°C

SPECIFICATIONS

PARAMETER TEST CONDITIONS
INPUT

OFFSET VOLTAGE, initial .5 2 mV
OFFSET VOLTAGE, vs. temperature Full temperature range 15 50 µV/°C
OFFSET VOLTAGE, vs. supply 10 25 µV/V
OFFSET VOLTAGE, vs. time 75 µV/√kh
BIAS CURRENT, initial 200 2000 pA
BIAS CURRENT, vs. supply 4 pA/V
OFFSET CURRENT, initial 50 500 pA
INPUT IMPEDANCE, DC 10
INPUT CAPACITANCE 4pF
COMMON MODE VOLTAGE RANGE

3

COMMON MODE REJECTION, DC VCM = ±90V 80 98 dB
NOISE 100KHz BW, RS = 1KΩ, CC = OPEN 1 µVrms

GAIN

OPEN LOOP, @ 15Hz RL = 2KΩ, CC = OPEN 94 111 dB
GAIN BANDWIDTH PRODUCT at 1MHz RL = 2KΩ, CC = OPEN 100 MHz
POWER BANDWIDTH RL = 2KΩ, CC = OPEN 470 kHz
PHASE MARGIN Full temperature range 60 °

OUTPUT

VOLTAGE SWING

3

IO = 200mA ±VS 12 ±VS 10 V
CURRENT, continuous 200 mA
SLEW RATE, AV = 100 CC = OPEN 240 300 V/µs
CAPACITIVE LOAD, AV = +1 Full temperature range 470 pF
SETTLING TIME to .1% CC = OPEN, 2V step 1 µs
RESISTANCE, no load 50 Ω

POWER SUPPLY

VOLTAGE

5

See note 5 ±40 ±150 ±225 V
CURRENT, quiescent, 10 14 mA

THERMAL

RESISTANCE, AC, junction to case

4

Full temperature range, F > 60Hz 2.5 °C/W
RESISTANCE, DC, junction to case Full temperature range, F < 60Hz 4.2 °C/W
RESISTANCE, junction to air Full temperature range 30 °C/W
TEMPERATURE RANGE, case Meets full range specifications –25 +85 °C

1

MIN TYP MAX UNITS

11

±

±VS 15 V

±

±

Ω

NOTES: 1. Unless otherwise noted: TC = 25°C, DC input specifications are ± value given. Power supply voltage is typical rating. RC = 100

CC = 68pF.

2. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation
to achieve high MTTF.

3. +VS and –VS denote the positive and negative power supply rail respectively.

4. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz.

5. Derate max supply rating .625 V/°C below 25°C case. No derating needed above 25°C case.

CAUTION

APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: [phone]

The PA91 is constructed from MOSFET transistors. ESD handling procedures must be observed.