Apex PA15A, PA15 Datasheet

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

HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS

MICROTECHNOLOGY

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

FEA TURES

• 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 pro­vides flexibility in choosing bandwidth and slew rate for the
application. The 10-pin power SIP package is electrically
isolated.

EQUIVALENT SCHEMATIC

6

+V

S

1

–IN

2

+IN

–V

S

5

R1 R2 C1 R3

Q1 Q2

Q6

Q5

R5

R8 R9

Q15

R11 R12

9

CC1

8

CC2

R6

Q3

Q8

Q12

Q16

R4

R7

Q11

Q13

R10

PA15 • PA15A

TYPICAL APPLICATION

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 PA15 reduces
the costs of power supplies and cooling with its advantages of
low cost and low quiescent power consumption while increas-

Q4

ILIM

7

10

OUT

Q14

ing circuit density with the SIP package.

EXTERNAL CONNECTIONS PACKAGE: SIP 02

12345678910

NC –V +V

–IN +IN

PHASE COMPENSATION

GAIN C

≥ 1 33pf 1KΩ

≥ 10 OPEN OPEN

SS

RCL =

C

I

LIM

R

C

C

OUTNC

C1

C2

C

C

C

R

CL

R

C

.6

I

CL

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

P A15 • PA15A

ABSOLUTE MAXIMUM RATINGS

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

SUPPLY VOLTAGE, +VS to –V
OUTPUT CURRENT, source, sink See SOA

S

450V

POWER DISSIPATION, continuous @ TC = 25°C 30W
INPUT VOLTAGE, differential ±25V
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

PA15

1

MIN TYP MAX MIN TYP MAX UNITS

PA15A

INPUT

OFFSET VOLTAGE, initial 2 10 .5 3 mV
OFFSET VOLTAGE, vs. temperature Full temperature range 15 50 5 20 µV/°C
OFFSET VOLTAGE, vs. supply 10 50 * * 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 30 200 pA
INPUT IMPEDANCE, DC 10
INPUT CAPACITANCE 4 * pF
COMMON MODE VOLTAGE RANGE

3

±VS–15 * V

11

* Ω

COMMON MODE REJECTION, DC VCM = ±90V 80 98 * * dB
NOISE 10KHz BW, RS = 1KΩ, CC = OPEN 2 * µVrms

GAIN

OPEN LOOP, @ 15Hz RL = 2KΩ, CC = OPEN 94 111 * * dB
GAIN BANDWIDTH PRODUCT at 1MHz RL = 2KΩ, CC = OPEN 5.8 * MHz
POWER BANDWIDTH RL = 2KΩ, CC = OPEN 24 * kHz
PHASE MARGIN Full temperature range 60 * °

OUTPUT

VOLTAGE SWING

3

IO = ±200mA ±VS–15 ±VS–10 * * V
CURRENT, continuous ±200 * mA
SLEW RATE, AV = 100 CC = OPEN 20 20 30 V/µs
CAPACITIVE LOAD, AV = +1 Full temperature range 100 * pf
SETTLING TIME to .1% CC = OPEN, 2V step 2 * µs
RESISTANCE, no load 50 * Ω

POWER SUPPLY

VOLTAGE

5

See note 5 ±50 ±150 ±225 * * * V
CURRENT, quiescent, 2.0 3.0 * * 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

NOTES: * The specification of PA15A is identical to the specification for PA15 in applicable column to the left.

1. Unless otherwise noted: TC = 25°C, compensation = CC = 33pF, RC = 1KΩ, RCL = 0. DC input specifications are ± value given.
Power supply voltage is typical rating.

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

The PA15 is constructed from MOSFET transistors. ESD handling procedures must be observed.
The exposed substrate contains beryllia (BeO). 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]

TYPICAL PERFORMANCE
GRAPHS

P A15 • PA15A

40

POWER DERATING

32

24

16

OUTPUT STAGE

8

0

0 25 50 75 100 125 150

INTERNAL POWER DISSIPATION, P(W)

CASE TEMPERATURE, T (°C)

C

SMALL SIGNAL RESPONSE

120
100

80
60
40

20

0

OPEN LOOP GAIN, A (dB)

–20

100 1K .1M 1M

10 10M

FREQUENCY, F (Hz)

C = Open

C = 33pF

C

10K

C

QUIESCENT CURRENT

2.8

Q

2.6

2.4

T = 85°C

C

T = 125°C

C

T = 25°C

C

2.2

QUIESCENT CURRENT, I (mA)

2.0
100 300

T = -55°C

C

200 400

TOTAL SUPPLY VOLTAGE, V (V)

SMALL SIGNAL RESPONSE

50

40

30

C = Open

20

10

C = 33pF

0

OPEN LOOP GAIN, A (dB)

–10

100K 10M

C

FREQUENCY, F (Hz)

C

1M

500

PP

O

C = 15pf

C = 33pf

C

C

C = Open

C

100

OUTPUT VOLTAGE, V (V )

450

S

20

2K 100K

10K

FREQUENCY, F (Hz)

200K

PHASE RESPONSE

45

POWER RESPONSE

90

135

φ

180

PHASE, (°)

225

270

100K 1M

FREQUENCY, F (Hz)

C = 33pF

C

C = Open

C

10M

10

SWING FROM +V

SO

S

85°C

8

125°C

6

–55°C

4

25°C

2

0 40 160 200

VOLTAGE DROP FROM SUPPLY, +V – V (V)

80 120

LOAD CURRENT, I (mA)

HARMONIC DISTORTION

.3

RL = 1KΩ
CC = Open

.1

AV = 30

24

SO

20

SWING FROM –V

S

85°C

16

12

125°C

8

4
0

0 40 200

VOLTAGE DROP FROM SUPPLY, +V – V (V)

100

LOAD CURRENT, I (mA)

COMMON MODE REJECTION

C = Open

C

–55°C

80 120 160

25°C

80

OPEN LOOP OUTPUT IMPEDANCE

400
350
300

C = Open

C

250
200
150
100

50

OUTPUT IMPEDANCE, R(Ω)

0

1M

FREQUENCY, F (Hz)

POWER SUPPLY REJECTION

120

100

3M10K 100K

80

60

40

.01

DISTORTION, (%)

5 watt

60

50 mW

40

20

.001

30

FREQUENCY, F (Hz)

20

30K100 1K 10K

10 1M

COMMON MODE REJECTION, CMR (dB)

1K 10K

100 .1M

FREQUENCY, F (Hz)

0

11M

POWER SUPPLY REJECTION, PSR (dB)

10 100 1K 10K .1M

FREQUENCY, F (Hz)

10M

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

P A15 • P A15A

OPERATING

CONSIDERATIONS

GENERAL

Please read Application Note 1 “General Operating Consid­erations”, which covers stability, supplies, heatsinking, mount­ing, current limit, SOA interpretation, and specification inter­pretation. Additional information can be found in other applica­tion notes. For information on the package outline, heatsinks,
and mounting hardware, consult the “Accessory and Package
Mechanical Data” section of the data book.

CURRENT LIMIT

For proper operation, the current limit resistor (RCL) must be
connected as shown in the external connection diagram. The
minimum value is 2 ohm, however for optimum reliability the
resistor value should be set as high as possible. The value is
calculated as follows; with the maximum practical value of 150
ohms.

R

CL

.6

=

I

LIM

SAFE OPERATING AREA (SOA)

The MOSFET output stage of this power operational ampli­fier has two distinct limitations:

1. The current handling capability of the MOSFET geometry

and the wire bonds.

2. The junction temperature of the output MOSFETs.
NOTE: The output stage is protected against transient flyback.

However, for protection against sustained, high energy flyback,
external fast-recovery diodes should be used. Pulsed output
currents may not reach 350 mA with V

500

DC, T

200mS

DC, T

C

= 125°C

300

, (mA)

S

200

OR –V

S

100

50

30

20

OUTPUT CURRENT FROM +V

PULSE CURVES @ 10% DUTY CYCLE MAX

10

25 50 75 100 250 500

SUPPLY TO OUTPUT DIFFERENTIAL, VS –VO (V)

– VO less than 25V.

S

100mS

DC, T

C

= 25°C

C

= 85°C

125

INPUT PROTECTION

Although the PA15 can withstand differential input voltages
up to ±25V, additional external protection is recommended. In
most applications 1N4148 or 1N914 signal diodes are suffi­cient (D1-D4 in Figure 2a). In more demanding applications
where low leakage or low capacitance are of concern 2N4416
or 2N5457-2N5459 JFETs connected as diodes will be re­quired (Q1-Q4 in Figure 2b). In either case the input differential
voltage will be clamped to ±1.4V. This is sufficient overdrive to
produce maximum power bandwidth.

POWER SUPPLY PROTECTION

Unidirectional zener diode transient suppressors are recom­mended as protection on the supply pins. The zeners clamp
transients to voltages within the power supply rating and also
clamp power supply reversals to ground. Whether the zeners
are used or not, the system power supply should be evaluated
for transient performance including power-on overshoot and
power-off polarity reversals as well as line regulation.

Conditions which can cause open circuits or polarity rever­sals on either power supply rail should be avoided or protected
against. Reversals or opens on the negative supply rail are
known to induce input stage failure. Unidirectional transzorbs
prevent this, and it is desirable that they be both electrically and
physically as close to the amplifier as possible.

STABILITY

The PA15 has sufficient phase margin to be stable with most
capacitive loads at a gain of 10 or more, using the recom­mended phase compensation.

The PA15 is externally compensated and performance can
be tailored to the ap­plication. Use the
graphs of small sig­nal response and
power response as a
guide. The compen­sation capacitor C
must be rated at
500V working volt­age. An NPO capaci­tor is recommended.
The compensation
network C

CRC

must
be mounted closely
to the amplifier pins
8 and 9 to avoid spu­rious oscillation.

C

–IN

+IN

Q1

a.

–IN

+IN

b.

Q3

Q2

Q4

+V

S

Z1

6

1

D2D1

PA15

D4D3

2

5

Z2

–V

S

+V

S

Z1

6

1

PA15

2

5

Z2

FIGURE 2. OVERVOLTAGE PROTECTION

This data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. All specifications are subject to change without notice.

PA15U REV. D MARCH 1999 © 1999 Apex Microtechnology Corp.

–V

S