PA07A - Apex Microtechnology

APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com

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

• 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 ther-

mistor compensated base-emitter voltage multiplier circuit. A

thermal shutoff circuit protects against overheating and mini-

mizes heatsink requirements for abnormal operating condi-

tions. The safe operating area (SOA) can be observed for all

operating conditions by selection of user programmable cur-

rent limiting resistors. Both amplifiers are internally compen-

sated for all gain settings. For continuous operation under

load, a heatsink of proper rating is recommended.

This hybrid circuit utilizes thick film (cermet) resistors, ce-

ramic capacitors and semiconductor chips to maximize reli-

ability, minimize size and give top performance. Ultrasonically

bonded aluminum wires provide reliable interconnections at all

operating temperatures. The 8-pin TO-3 package is hermeti-

cally 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

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

8-pin TO-3 package

CL+

+IN

–IN

–V BAL

CL–

OUT

TOP VIEW

CL+

CL–

OUTPUT

= ( V

++–V

) R

/1.6

TYPICAL APPLICATION

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 momen-

tary 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.

EXTERNAL CONNECTIONS

MOTOR

CL+

CL–

+32V

.68 Ω

–32V

–V PD1 PD2

LIGHT

V = 28

EMF = 14V

R = 14 Ω

PA07

Negates optoelectronic instabilities

Lead network minimizes overshoot

SEQUENTIAL POSITION CONTROL

Q1 Q2

Q5 Q4 Q3

Q8 Q9

Q12A Q12B

Q10

Q15

Q18 D2

C4 Q11

Q16

Q19

Q6A Q6B

Q17A Q17B

HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739

MICROTECHNOLOGY

FET INPUT POWER OPERATIONAL AMPLIFIERS

PA07 • PA07A

APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739

ABSOLUTE MAXIMUM RATINGS

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS SUPPLY VOLTAGE, +VS to –VS100V

OUTPUT CURRENT, within SOA 5A

POWER DISSIPATION, internal167W

INPUT VOLTAGE, differential ±50V

INPUT VOLTAGE, common mode ±VS

TEMPERATURE, pin solder - 10s 300°C

TEMPERATURE, junction1200°C

TEMPERATURE RANGE, storage –65 to +150°C

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

PARAMETER TEST CONDITIONS2MIN TYP MAX MIN TYP MAX UNITS

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, initial3TC = 25°C550310pA

BIAS CURRENT,vs. supply TC = 25°C .01 * pA/V

OFFSET CURRENT, initial3TC = 25°C 2.5 50 1.5 10 pA

INPUT IMPEDANCE, DC TC = 25°C10

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 = 15Ω92 98 * * dB

GAIN BANDWIDTH PRODUCT @ 1MHz TC = 25°C, RL = 15Ω1.3 * MHz

POWER BANDWIDTH TC = 25°C, RL = 15Ω18 * kHz

PHASE MARGIN Full temperature range, RL = 15Ω70 * °

OUTPUT

VOLTAGE SWING4Full temp. range, IO = 5A ±VS–5 * V

VOLTAGE SWING4Full temp. range, IO = 2A ±VS–5 * V

VOLTAGE SWING4Full 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 case5F>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

PA07A

PA07

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.

PA07 • PA07A

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.

CAUTION

APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com

TYPICAL PERFORMANCE

GRAPHS PA07 • PA07A

0 20 40 60 80 100 120

POWER DERATING

INTERNAL POWER DISSIPATION, P(W)

–15 25 105

.06

256

BIAS CURRENT

.25

10 100 10K .1M

FREQUENCY, F (Hz)

INPUT NOISE VOLTAGE, V (nV/ Hz)

1 100 10M

FREQUENCY, F (Hz)

–20

120

SMALL SIGNAL RESPONSE

OPEN LOOP GAIN, A (dB)

100

1 100 .1M 10M

–180

–150

–60

PHASE RESPONSE

–90

–30

10K 20K 50K .1M

FREQUENCY, F (Hz)

4.6

OUTPUT VOLTAGE, V (V )

100 1K 3K .1M

FREQUENCY, F (Hz)

HARMONIC DISTORTION

DISTORTION, THD (%)

.01

40 100

TOTAL SUPPLY VOLTAGE, V

(V)

1.6

QUIESCENT CURRENT

NORMALIZED QUIESCENT CURRENT, I (X)

1.4

023 6

OUTPUT CURRENT, I (A)

OUTPUT VOLTAGE SWING

VOLTAGE DROP FROM SUPPLY, V (V)

SAT

1 10K

FREQUENCY, F (Hz)

COMMON MODE REJECTION

COMMON MODE REJECTION, CMR (dB)

120

.1M10 100 0 TIME, t (µs)

PULSE RESPONSE

OUTPUT VOLTAGE, V (V )

–50 –25 50 100

CASE TEMPERATURE, T

(°C)

3.0

CURRENT LIMIT

CURRENT LIMIT, I (A)

LIM

2.5

300 10K 30K

INPUT NOISE

√

5456585

POWER RESPONSE

30K

50 60 70 80 90

1.2

025 75

1.0

1.5

–8

10 1K 10K .1M 1M

140

60 T = T

T = T

10 10K 1M

FREQUENCY, F (Hz)

PHASE, (°)ϕ

TEMPERATURE, T (°C)

NORMALIZED BIAS CURRENT, I (X)

2.0

R = 0.6

Ω

R = 0.3

Ω

1K 1M

100

2 4 6 8 10 12

–6

–4

–2

OPP

70K

6.8

100

V = ±5V, t = 100ns

IN r

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

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

.03

P = 60W, V = ±36V, R = 8

OSL

P = 50W, V = ±25V, R = 4

OSL

P = 50mW, R = 8

Ω

T = 25°C

T = 85°C

T = –25°C

1.0

T = –25°C

T = 25°C

T = 85°C

T = 125°C

TEMPERATURE, T

(°C)

–120

–210

G =10

OPERATING

CONSIDERATIONS

GENERAL

Please read the “General Operating Considerations” sec-

tion, which covers stability, supplies, heatsinking, mounting,

current limit, SOA interpretation, and specification interpreta-

tion. Additional information can be found in the application

notes. For information on the package outline, heatsinks, and

mounting hardware, consult the “Accessory and Package

Mechanical Data” section of the handbook.

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 volt-

age exceed specified limits.

3. The junction temperature of the output transistors.

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.

1. Under transient conditions, capacitive and inductive* loads

up to the following maximum are safe:

CAPACITIVE LOAD INDUCTIVE LOAD

±VSILIM = 2A ILIM = 5A ILIM = 2A ILIM = 5A

50V 80µF75µF 55mH 7.5mH

40V 250µF 150µF 150mH 11mH

30V 1,200µF 500µF 250mH 24mH

20V 20mF 5mF 1.5H 75mH

15V ∞25mF ∞100mH

5.0

3.0

2.0

1.5

1.0

.210 15 20 25 30 35 40 50 60 70 80 100

SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE V –V (V)

OUTPUT CURRENT FROM +V OR –V (A)

THERMAL

Tc = 25°C

Tc = 85°C

Tc = 125°C

steady state

steady state SECOND BREAKDOWN

t = 0.5ms

t = 1ms

t = 5ms

PA07 • PA07A

*If the inductive load is driven near steady state conditions,

allowing the output voltage to drop more than 12V below the

supply rail with ILIM = 5A or 32V below the supply rail with ILIM =

2A while the amplifier is current limiting, the inductor must be

capacitively coupled or the current limit must be lowered to

meet SOA criteria.

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 TC = 85°C:

SHORT TO ±VSSHORT TO

±VSC, L, OR EMF LOAD COMMON

50V .25A .82A

40V .37A 1.4A

30V .65A 2.1A

20V 1.4A 3.3A

15V 2.1A 4.5A

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 there-

fore does not protect the amplifier against transient SOA

violations (areas outside of the TC = 25°C boundary). It is

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.

CURRENT LIMIT

Proper operation requires the use of two current limit resis-

tors, connected as shown in the external connections diagram.

The minimum value for RCL is .12Ω, however, for optimum

reliability it should be set as high as possible. Refer to the

“General Operating Considerations” section of the handbook

for current limit adjust details.

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.