Apex PA07A, PA07 Datasheet

CL+

+V

+IN

–IN

–V

BAL

CL–

OUT

S

S

TOP VIEW

R

CL+

R

CL–

R

T

R

S

OUTPUT

R

S

= ( VS++–VS) RT/1.6

1

2

3

4

5

6

7

8

MOTOR

R

CL+

R

CL–

C

L

C

F

R

L

R

F2

R

F1

+32V

.68 Ω

.68 Ω

–32V

+V

–V

PD1 PD2

LIGHT

V = 28
EMF = 14V
R = 14 Ω

PA07

W

FET INPUT POWER OPERATIONAL AMPLIFIERS

MICROTECHNOLOGY

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

FEATURES

• LOW BIAS CURRENT — FET Input

• PROTECTED OUTPUT STAGE — Thermal Shutoff

• EXCELLENT LINEARITY — Class A/B Output

• WIDE SUPPLY RANGE — ±12V TO ±50V

• HIGH OUTPUT CURRENT — ±5A Peak

APPLICATIONS

PA07 • PA07A

• MOTOR, VALVE AND ACTUATOR CONTROL

• MAGNETIC DEFLECTION CIRCUITS UP TO 4A

• POWER TRANSDUCERS UP TO 100kHz

• TEMPERATURE CONTROL UP TO 180W

• PROGRAMMABLE POWER SUPPLIES UP TO 90V

• AUDIO AMPLIFIERS UP TO 60W RMS

DESCRIPTION

The PA07 is a high voltage, high output current operational
amplifier designed to drive resistive, inductive and capacitive
loads. For optimum linearity, especially at low levels, the
output stage is biased for class A/B operation using a ther­mistor compensated base-emitter voltage multiplier circuit. A
thermal shutoff circuit protects against overheating and mini­mizes heatsink requirements for abnormal operating condi­tions. The safe operating area (SOA) can be observed for all
operating conditions by selection of user programmable cur­rent limiting resistors. Both amplifiers are internally compen­sated for all gain settings. For continuous operation under
load, a heatsink of proper rating is recommended.

This hybrid circuit utilizes thick film (cermet) 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 8-pin TO-3 package is hermeti­cally sealed and electrically isolated. The use of compressible
washers and/or improper mounting torque will void the product
warranty. Please see “General Operating Considerations”.

EQUIVALENT SCHEMATIC

3

TYPICAL APPLICATION

Negates optoelectronic instabilities

Lead network minimizes overshoot

SEQUENTIAL POSITION CONTROL

Position is sensed by the differentially connected photo
diodes, a method that negates the time and temperature
variations of the optical components. Off center positions
produce an error current which is integrated by the op amp
circuit, driving the system back to center position. A momen­tary switch contact forces the system out of lock and then the
integrating capacitor holds drive level while both diodes are in
a dark state. When the next index point arrives, the lead
network of C1 and R1 optimize system response by reducing
overshoot. The very low bias current of the PA07 augments
performance of the integrator circuit.

7

Q1 Q2

Q5

Q8

5

Q12A Q12B

4

6

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

Q15

Q9

C3

Q18

D1

Q4

Q10

D3

D2

C2

C4

Q11

Q3

Q16

C1

Q7

Q19

Q6A

Q6B

2

1

8

Q17B

Q17A

EXTERNAL CONNECTIONS

NOTE: Input offset voltage trim optional. RT = 10KΩ MAX

8-pin TO-3 package

PA07 • PA07A

ABSOLUTE MAXIMUM RATINGS

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

SUPPLY VOLTAGE, +VS to –V
OUTPUT CURRENT, within SOA 5A
POWER DISSIPATION, internal

S

1

100V

67W
INPUT VOLTAGE, differential ±50V
INPUT VOLTAGE, common mode ±V
TEMPERATURE, pin solder - 10s 300°C
TEMPERATURE, junction

1

S

200°C
TEMPERATURE RANGE, storage –65 to +150°C
OPERATING TEMPERATURE RANGE, case –55 to +125°C

SPECIFICATIONS

PARAMETER TEST CONDITIONS

PA07

2

MIN TYP MAX MIN TYP MAX UNITS

PA07A

INPUT

OFFSET VOLTAGE, initial TC = 25°C.5±2 ±.25 ±.5 mV
OFFSET VOLTAGE, vs. temperature Full temperature range 10 30 5 10 µV/°C
OFFSET VOLTAGE, vs. supply TC = 25°C8*µV/V
OFFSET VOLTAGE, vs. power Full temperature range 20 10 µV/W
BIAS CURRENT, initial
BIAS CURRENT,vs. supply TC = 25°C .01 * pA/V
OFFSET CURRENT, initial
INPUT IMPEDANCE, DC TC = 25°C10

3

3

TC = 25°C550310pA
TC = 25°C 2.5 50 1.5 10 pA

11

* Ω
INPUT CAPACITANCE TC = 25°C4*pF
COMMON MODE VOLTAGE RANGE4Full temperature range ±VS–10 * V
COMMON MODE REJECTION, DC Full temperature range, VCM = ±20V 120 * dB

GAIN

OPEN LOOP GAIN at 10Hz TC = 25°C, RL = 15Ω 92 98 * * dB
GAIN BANDWIDTH PRODUCT @ 1MHz TC = 25°C, RL = 15Ω 1.3 * MHz
POWER BANDWIDTH TC = 25°C, RL = 15Ω 18 * kHz
PHASE MARGIN Full temperature range, RL = 15Ω 70 * °

OUTPUT

VOLTAGE SWING
VOLTAGE SWING
VOLTAGE SWING

4
4
4

Full temp. range, IO = 5A ±VS–5* V
Full temp. range, IO = 2A ±VS–5* V

Full temp. range, IO = 90mA ±VS–5* V
CURRENT, peak TC = 25°C5*A
SETTLING TIME to .1% TC = 25°C, 2V step 1.5 * µs
SLEW RATE TC = 25°C5*V/µs
CAPACITIVE LOAD, unity gain Full temperature range 10 * nF
CAPACITIVE LOAD, gain>4 Full temperature range SOA *

POWER SUPPLY

VOLTAGE Full temperature range ±12 ±35 ±50 * * * V
CURRENT, quiescent TC = 25°C1830**mA

THERMAL

RESISTANCE, AC, junction to case

5

F>60Hz 1.9 2.1 * * °C/W
RESISTANCE, DC, junction to case F<60Hz 2.4 2.6 * * °C/W
RESISTANCE, junction to air 30 * °C/W
TEMPERATURE RANGE, case Meets full range specifications –25 25 +85 * * * °C

NOTES: * The specification of PA07A is identical to the specification for PA07 in applicable column to the left.

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

2. The power supply voltage for all specifications is the TYP rating unless otherwise noted as a test condition.

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

4. +VS and –VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to –VS.

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

CAUTION

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]

TYPICAL PERFORMANCE
GRAPHS

PA07 • PA07A

70

60
50

POWER DERATING

T = T

C

40
30
20
10

0

0 20 40 60 80 100 120

INTERNAL POWER DISSIPATION, P(W)

120

TEMPERATURE, TC (°C)

SMALL SIGNAL RESPONSE

T = T

A

100

80

OL

60
40

20

0

OPEN LOOP GAIN, A (dB)

–20

1 100 10M

10 1K 10K .1M 1M

FREQUENCY, F (Hz)

140

256

B

BIAS CURRENT

64

16

4

1

.25

.06

NORMALIZED BIAS CURRENT, I (X)

–15 25 105

5456585

TEMPERATURE, T (°C)

PHASE RESPONSE

0

C

–30
–60
–90

–120

PHASE, (°)ϕ

–150
–180

–210

10 10K 1M

1 100 .1M 10M

1K

FREQUENCY, F (Hz)

3.0

2.5

LIM

2.0

1.5

R = 0.3CLΩ

R = 0.6CLΩ

1.0

.5

CURRENT LIMIT, I (A)

0

–50 –25 50 100

025 75

CASE TEMPERATURE, T

POWER RESPONSE

CURRENT LIMIT

100

68

PP

46

O

32
22

15
10

6.8

OUTPUT VOLTAGE, V (V )

4.6
10K 20K 50K .1M

|+V | + |-V | = 100V

SS

|+V | + |-V | = 70V

SS

30K

FREQUENCY, F (Hz)

C

70K

(°C)

COMMON MODE REJECTION

120

100

80

60
40

20

0

1 10K

COMMON MODE REJECTION, CMR (dB)

10

FREQUENCY, F (Hz)

HARMONIC DISTORTION

1K 1M

.1M10 100 0

G =10

3

1

.3

.1

DISTORTION, THD (%)

.03
.01

100 1K 3K .1M

, R = 8

S

O

P = 50mW

O

P = 50W, V = ±25V, R = 4

O

P = 60W, V = ±36V, R = 8

300 10K 30K

Ω

Ω

L

S

Ω

L

L

FREQUENCY, F (Hz)

PULSE RESPONSE

8

V = ±5V, t = 100ns

IN r

OPP

6
4
2
0

–2
–4

–6

OUTPUT VOLTAGE, V (V )

–8

2 4 6 8 10 12

TIME, t (µs)

QUIESCENT CURRENT

Q

1.6

1.4

1.2

1.0

.8

.6

.4

50 60 70 80 90

40 100

TOTAL SUPPLY VOLTAGE, V

NORMALIZED QUIESCENT CURRENT, I (X)

–25

T =

C

T = 25

C

T = 85

C

T = 125

C

°C

°C

°C

°C

(V)

S

20

INPUT NOISE

√

N

10

6

4

2

INPUT NOISE VOLTAGE, V (nV/ Hz)

10 100 10K .1M

1K

FREQUENCY, F (Hz)

OUTPUT VOLTAGE SWING

6

SAT

5

4

3

2

T = 85

C

°C

C

T =

–25°C

T = 25

C

°C

1

0

023 6

VOLTAGE DROP FROM SUPPLY, V (V)

15

OUTPUT CURRENT, I (A)

4

O

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

PA07 • PA07A

GENERAL

Please read Application Note 1 "General Operating Consid­erations" which covers stability, supplies, heat sinking, mount­ing, current limit, SOA interpretation, and specification inter­pretation. Visit www.apexmicrotech.com for design tools that
help automate tasks such as calculations for stability, internal
power dissipation, current limit; heat sink selection; Apex’s
complete Application Notes library; Technical Seminar Work­book; and Evaluation Kits.

SAFE OPERATING AREA (SOA)

The output stage of most power amplifiers has three distinct
limitations:

1. The current handling capability of the wire bonds.

2. The second breakdown effect which occurs whenever the

simultaneous collector current and collector-emitter volt­age exceed specified limits.

3. The junction temperature of the output transistors.

5.0

Tc = 85°C

4.0

(A)

S

3.0

2.0

OR – V

S

1.5

1.0
.8

.6

.4
.3

OUTPUT CURRENT FROM +V

.2

10 15 20 25 30 35 40 50 60 70 80 100

SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE VS – VO (V)

steady state SECOND BREAKDOWN

Tc = 125°C

THERMAL

t = 5ms

t = 0.5ms

t = 1ms

OPERATING

CONSIDERATIONS

2. The amplifier can handle any reactive or EMF generating
load and short circuits to the supply rail or common if the
current limits are set as follows at T

SHORT TO

±V

S

C, L, OR EMF LOAD COMMON

±V

S

= 85°C:

C

SHORT TO

50V .21A .61A
40V .3A .87A
30V .46A 1.4A
20V .87A 2.5A
15V 1.4A 4.0A

These simplified limits may be exceeded with further analysis
using the operating conditions for a specific application.

3. The output stage is protected against transient flyback.
However, for protection against sustained, high energy
flyback, external fast-recovery diodes should be used.

THERMAL SHUTDOWN PROTECTION

The thermal protection circuit shuts off the amplifier when
the substrate temperature exceeds approximately 150°C. This
allows heatsink selection to be based on normal operating
conditions while protecting the amplifier against excessive
junction temperature during temporary fault conditions.

Thermal protection is a fairly slow-acting circuit and there­fore does not protect the amplifier against transient SOA
violations (areas outside of the T
designed to protect against short-term fault conditions that
result in high power dissipation within the amplifier. If the
conditions that cause thermal shutdown are not removed, the
amplifier will oscillate in and out of shutdown. This will result in
high peak power stresses, will destroy signal integrity and
reduce the reliability of the device.

= 25°C boundary). It is

C

SAFE OPERATING AREA CURVES

The SOA curves combine the effect of these limits. For a
given application, the direction and magnitude of the output
current should be calculated or measured and checked against
the SOA curves. This is simple for resistive loads but more
complex for reactive and EMF generating loads. However, the
following guidelines may save extensive analytical efforts.

CURRENT LIMIT

Proper operation requires the use of two current limit resis­tors, connected as shown in the external connections diagram.
The minimum value for R
reliability it should be set as high as possible. Refer to the
“General Operating Considerations” section of the handbook
for current limit adjust details.

is .12Ω, however, for optimum

CL

1. For DC outputs, especially those resulting from fault condi­tions, check worst case stress levels against the new SOA
graph.

For sine wave outputs, use Power Design

1

to plot a load
line. Make sure the load line does not cross the 0.5ms limit
and that excursions beyond any other second breakdown
line do not exceed the time label, and have a duty cycle of
no more than 10%.

For other waveform outputs, manual load line plotting is
recommended. Applications Note 22, SOA AND LOAD
LINES, will be helpful. A Spice type analysis can be very
useful in that a hardware setup often calls for instruments or
amplifiers with wide common mode rejection ranges.

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.

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

PA07U REV. L FEBRUARY 2001 © 2001 Apex Microtechnology Corp.

1

Note 1. Power Design is a self-extracting Excel spreadsheet

available free from www.apexmicrotech.com