Apex PA89, PA89A Datasheet

HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS

MICROTECHNOLOGY

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

FEATURES

• 1140V P-P SIGNAL OUTPUT

• WIDE SUPPLY RANGE — ±75V to ±600V

• PROGRAMMABLE CURRENT LIMIT

• 75 mA CONTINUOUS OUTPUT CURRENT

• HERMETIC SEALED PACKAGE

• INPUT PROTECTION

PA89 • PA89A

APPLICATIONS

• PIEZOELECTRIC POSITIONING

• HIGH VOLTAGE INSTRUMENTATION

• ELECTROSTATIC DEFLECTION

• SEMICONDUCTOR TESTING

DESCRIPTION

The PA89 is an ultra high voltage, MOSFET operational
amplifier designed for output currents up to 75 mA. Output
voltages can swing over 1000V p-p. The safe operating area
(SOA) has no second breakdown limitations and can be
observed with all types of loads by choosing an appropriate
current limiting resistor. High accuracy is achieved with a
cascode input circuit configuration and 120dB open loop gain.
All internal biasing is referenced to a bootstrapped zener­MOSFET current source, giving the PA89 a wide supply range
and excellent supply rejection. The MOSFET output stage is
biased for class A/B linear operation. External compensation
provides user flexibility. The PA89 is 100% gross leak tested
to military standards for long term reliability.

This hybrid integrated circuit utilizes a beryllia (BeO) sub­strate, thick film resistors, ceramic capacitors and semicon­ductor chips to maximize reliability, minimize size and give top
performance. Ultrasonically bonded aluminum wires provide
reliable interconnections at all operating temperatures. The
MO-127 High Voltage, Power Dip™ package is hermetically
sealed and electrically isolated.

SIMPLIFIED SCHEMATIC

D1

Q1 Q2

Q22 Q23

Q25A Q25B

D30
D35

Q45

Q5

D57

COMP

+IN–IN

21

D34
D31

D5

109

Q29

Q19

Q44

Q26

Q36

Q20

OUT

Q42

+V

C

–V

TYPICAL APPLICATION

Ultra-high voltage capability combined with the bridge am­plifier configuration makes it possible to develop +/–1000 volt
peak swings across a piezo element. A high gain of –50 for A1
insures stability with the capacitive load, while “noise-gain”
compensation Rn and Cn on A2 insure the stability of A2 by
operating in a noise gain of 50.

50R

+600V

R

V

IN

A1

PA89

PIEZO

TRANSDUCER

–600V

SINGLE AXIS MICRO-POSITIONING

50R

50R

+600V

PA89

–600V

A2

EXTERNAL CONNECTIONS*

–IN
+IN

N/C

8

S

L

7

6

N/C
–V

S

OUT

1
2
3

TOP

TOP

VIEW

VIEW

4
5
6

R

12
11
10

9
8
7

CL

PHASE COMPENSATION

Gain C

1 470pF 470Ω

10 68pF 220Ω

S

5

Note: CC must be rated for full supply voltage –Vs to +Vs.

15 33pF 220Ω

100 15pF 220Ω

See details under “EXTERNAL COMPONENTS”.

C

RESERVED
RESERVED
COMP
COMP
+V

S

C

R =

R

PATENTED

C

C

R

C

L

CL

C

R

Cn

.7
I

LIM

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

P A89 • P A89A

ABSOLUTE MAXIMUM RATINGS

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

SUPPLY VOLTAGE, +VS to –V
OUTPUT CURRENT, within SOA 100mA

S

1200V

POWER DISSIPATION, internal at TC = 25°C 40W
INPUT VOLTAGE, differential ±25V
INPUT VOLTAGE, common mode ±VS 25V
TEMPERATURE, pin solder - 10s max 300°C
TEMPERATURE, junction

2

±

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

SPECIFICATIONS

PARAMETER TEST CONDITIONS

PA89

1

MIN TYP MAX MIN TYP MAX UNITS

PA89A

INPUT

OFFSET VOLTAGE, initial .5 2 .25 .5 mV
OFFSET VOLTAGE, vs. temperature Full temperature range 10 30 5 10 µV/°C
OFFSET VOLTAGE, vs. supply 7 * µV/V
OFFSET VOLTAGE, vs. time 75 * µV/kh
BIAS CURRENT, initial
BIAS CURRENT,vs. supply .01 * pA/V
OFFSET CURRENT, initial
INPUT IMPEDANCE, DC 10
INPUT CAPACITANCE 4 * pF
COMMON MODE VOLTAGE RANGE4Full temperature range ±VS 50 * V

3

3

550 310pA
550 320pA

5

*MΩ

±

COMMON MODE REJECTION, DC Full temperature range, VCM = ±90V 96 110 * * dB
INPUT NOISE 10kHz BW, RS = 10K, CC = 15pF 4 µV RMS

GAIN

OPEN LOOP GAIN at 10Hz RL = 10k, CC = 15pF 108 120 * * dB
GAIN BANDWIDTH PRODUCT RL = 10k, CC = 15pF, AV = 100 10 * MHz
POWER BANDWIDTH RL = 10k, CC = 15pF, VO = 500V p-p 5 * kHz
PHASE MARGIN Full temperature range, AV = 10 60 * °

OUTPUT

VOLTAGE SWING
VOLTAGE SWING

4
4

IO = 75mA ±VS 30 ±VS 15 * * V
Full temperature range, IO = 20mA ±VS 20 ±VS 12 * * V

±
±

±

±

CURRENT, continuous Full temperature range 75 * mA
SLEW RATE CC = 15pF, AV = 100 12 16 * * V/µs
CAPACITIVE LOAD, Av = 10 Full temperature range 1 * nF
CAPACITIVE LOAD, Av>10 Full temperature range SOA *
SETTLING TIME to .1% RL = 10KΩ, 10V step, Av = 10 2 * µs

POWER SUPPLY

VOLTAGE, V
CURRENT, quiescent 4.8 6.0 * * mA

4

S

Full temperature range ±75 ±500 ±600 * * * V

THERMAL

RESISTANCE, AC, junction to case5Full temperature range, F > 60Hz 2.1 2.3 * * °C/W
RESISTANCE, DC, junction to case Full temperature range, F < 60Hz 3.3 3.5 * * °C/W
RESISTANCE, junction to air Full temperature range 15 * °C/W
TEMPERATURE RANGE, case Meets full range specifications –25 +85 * * °C

NOTES: * The specification of PA89A is identical to the specification for PA89 in applicable column to the left.

1. Unless otherwise noted: TC = 25°C, CC = 68pF, RC = 220Ω, and VS = ±500V. Input parameters for bias currents and offset
voltage are ± values given.

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

3. Doubles for every 10°C of temperature increase.

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

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

CAUTION

The PA89 is constructed from MOSFET transistors. ESD handling procedures must be observed.
The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or

subject to temperatures in excess of 850°C to avoid generating toxic fumes.

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