Apex PA94 Datasheet

HIGH VOLTAGE POWER OPERATIONAL AMPLIFIER

F

R

PA94

IN

R

PIEZO DRIVE

S

–V

S

+V

OUT

V

COMPUTER

FOCUS

COMMAND

VOLTAGE

CL

R

1

2

10

8

7

12

MICROTECHNOLOGY

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

FEATURES

• HIGH VOLTAGE — 900V (±450V)

• HIGH SLEW RATE — 500V/µS

• HIGH OUTPUT CURRENT — 100mA

• PROGRAMMABLE CURRENT LIMIT

APPLICATIONS

• HIGH VOLTAGE INSTRUMENTATION

• PROGRAMMABLE POWER SUPPLIES UP TO ±430V

• MASS SPECTROMETERS

• SEMICONDUCTOR MEASUREMENT EQUIPMENT

DESCRIPTION

The PA94 is a high voltage, MOSFET operational amplifier
designed as a low cost solution for driving continuous output
currents up to 100mA and pulse currents up to 200mA into
capacitive loads. The safe operating area (SOA) has no
second breakdown limitations and can be observed for all load
types 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 SIP04
package uses a minimum of board space allowing for high
density circuit boards.

PA94

PATENT PENDING

TYPICAL APPLICATION

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 PA94 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.

EQUIVALENT SCHEMATIC

12

+V

S

1

–IN

2

+IN

–V

S

10

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

Q1 Q2

Q5

R5

R8

Q15

R11

R1 R2 C1

Q6

CC1

R9

R3

Q3

6

CC2

4

R6

Q8

Q12

Q16

R12

Q11

Q13

R4

R10

R7

Q4
ILIM

OUT

Q14

8

EXTERNAL CONNECTIONS PACKAGE SIP04

7

–IN +IN CC1 CC2 OUT I

12 4 678 10

C

c

*

.01µF or greater ceramic power supply bypassing required.

PHASE COMPENSATION

GAIN

≥100

≥50
≥10

=

R

LIM

C

2.2pF

4.7pF
22pF

.7

I

LIM

lim

R

LIM

C

–Vs +Vs

**

12

PA94

ABSOLUTE MAXIMUM RATINGS

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

SUPPLY VOLTAGE, +VS to –V
OUTPUT CURRENT, source, sink 200mA, within SOA
POWER DISSIPATION, continuous @ TC = 25°C 30W
INPUT VOLTAGE, differential ±20V
INPUT VOLTAGE, common mode
TEMPERATURE, pin solder - 10s max 220°C
TEMPERATURE, junction
TEMPERATURE, storage –65 to +150°C
OPERATING TEMPERATURE RANGE, case –55 to +125°C

S

3

2

900V

±V

S

150°C

SPECIFICATIONS

PARAMETER TEST CONDITIONS
INPUT

OFFSET VOLTAGE, initial .5 5 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 RANGE3Vs=±250V SEE NOTE 3 ±VS 30 V
COMMON MODE REJECTION, DC VCM = ±90V 80 98 dB
NOISE 10KHz BW, RS = 1KΩ 2 µVrms

GAIN

OPEN LOOP, @ 15Hz RL = 5KΩ 94 115 dB
GAIN BANDWIDTH PRODUCT at 1MHz RL = 5KΩ 140 MHz
POWER BANDWIDTH RL = 5KΩ 300 kHz
PHASE MARGIN, Av=100 Full temperature range 60 °

OUTPUT

VOLTAGE SWING IO = 100mA ±VS 24 ±VS 20 V
CURRENT, continuous 100 mA
SLEW RATE, AV = 100 CC =2.2pF 500 700 V/µs
SETTLING TIME to .1% 2V step 1 µs
RESISTANCE no load 100 Ω

POWER SUPPLY

VOLTAGE
CURRENT, quiescent total 17 24 mA
CURRENT, quiescent output stage only 120 µA

THERMAL

RESISTANCE, AC, junction to case
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

5

See note 5 ±50 ±300 ±450 V

4

Full temperature range, F > 60Hz 2.5 °C/W

1

MIN TYP MAX UNITS

11

Ω

±

±

±

NOTES: 1. Unless otherwise noted: TC = 25°C, DC input specifications are ± value given. Power supply voltage is typical rating. Cc= 4.7pF.

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

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

3. Although supply voltages can range up to ± 450V the input pins cannot swing over this range. The input pins must be at least
30V from either supply rail but not more than 500V from either supply rail. See text for a more complete description of the
common mode voltage range.

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

The PA94 is constructed from MOSFET transistors. ESD handling procedures must be observed.