PA51A - Apex Microtechnology - Datasheet.Directory

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

FEATURES

• WIDE SUPPLY RANGE — ±10 to ±40V

• HIGH OUTPUT CURRENT — ±10A Peak

• SECOND SOURCEABLE — OPA501, 8785

• CLASS “C” OUTPUT — Low Cost

• LOW QUIESCENT CURRENT — 2.6mA

APPLICATIONS

• DC SERVO AMPLIFIER

• MOTOR/SYNCHRO DRIVER

• VALVE AND ACTUATOR CONTROL

• DC OR AC POWER REGULATOR

DESCRIPTION

The PA51 and PA51A are high voltage, high output current

operational amplifiers designed to drive resistive, inductive

and capacitive loads. Their complementary common emitter

output stage is the simple class C type optimized for low

frequency applications where crossover distortion is not criti-

cal. These amplifiers are not recommended for audio, trans-

ducer or deflection coil drive circuits. The safe operating area

(SOA) is fully specified and 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, mounting

on a heatsink of proper rating is recommended. Do not use

isolation washers!

This hybrid integrated circuit utilizes thick film conductors,

ceramic capacitors and semiconductor chips to maximize

reliability, minimize size and give top performance. Ultrasoni-

cally bonded aluminum wires provide reliable interconnec-

tions at all operating temperatures. The 8-pin TO-3 package is

electrically isolated and hermetically sealed. The use of com-

pressible thermal washers and/or improper mounting torque

will void the product warranty. Please see “General Operating

Considerations”.

EQUIVALENT SCHEMATIC

TYPICAL APPLICATION

The linear relationship of torque output to current input of the

modern torque motor makes this simple control circuit ideal for

many material processing and testing applications. The sense

resistor develops a feedback voltage proportional to motor

current and the small signal properties of the Power Op Amp

insure accuracy. With this closed loop operation, temperature

induced impedance variations of the motor winding are auto-

matically compensated.

EXTERNAL CONNECTIONS

Ω

–28V

+10V

PA51

0/+5V

MOTOR CURRENT IS A FUNCTION OF V

PROGRAMMABLE TORQUE CIRCUIT

Ω

2.5K

4.16K

DAC

0/6A

CL+

+IN

–IN

–V N.C.

CL–

OUT

TOP VIEW

RCL+

RCL–

OUTPUT

C1 Q4

Q6A Q6B

Q1A Q1B

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

MICROTECHNOLOGY

POWER OPERATIONAL AMPLIFIERS

PA51 • PA51A

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

ABSOLUTE MAXIMUM RATINGS

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

PARAMETER TEST CONDITIONS2, 5 MIN TYP MAX MIN TYP MAX UNITS

INPUT

OFFSET VOLTAGE, initial TC = 25°C±5±10 ±2±5mV

OFFSET VOLTAGE, vs. temperature Full temperature range ±10 ±65 * ±40 µV/°C

OFFSET VOLTAGE, vs. supply TC = 25°C±35 * µV/V

OFFSET VOLTAGE, vs. power TC = 25°C±20 * µV/W

BIAS CURRENT, initial TC = 25°C±15 ±40 * ±20 nA

BIAS CURRENT, vs. temperature Full temperature range ±.05 * nA/°C

BIAS CURRENT, vs. supply TC = 25°C±.02 * nA/V

OFFSET CURRENT, initial TC = 25°C±5±12 ±2±3nA

OFFSET CURRENT, vs. temperature Full temperature range ±.01 * nA/°C

INPUT IMPEDANCE, common mode TC = 25°C 250 * MΩ

INPUT IMPEDANCE, differential TC = 25°C10*MΩ

INPUT CAPACITANCE TC = 25°C3*pF

COMMON MODE VOLTAGE RANGE3Full temperature range ±VS–6±VS–3** V

COMMON MODE REJECTION, DC3TC = 25°C, VCM = ±VS –6V 70 110 80 * dB

GAIN

OPEN LOOP GAIN at 10Hz Full temp. range, full load 94 115 * * dB

GAIN BANDWIDTH PRODUCT @ 1MHz TC = 25°C, full load 1 * MHz

POWER BANDWIDTH TC = 25°C, IO = 8A, VO = 40VPP 10 16 * * kHz

PHASE MARGIN Full temperature range 45 * °

OUTPUT

VOLTAGE SWING3TC = 25°C, IO = 10A ±VS–8±VS–5** V

VOLTAGE SWING3Full temp. range, IO = 4A ±VS–6±VS–4** V

VOLTAGE SWING3Full temp. range, IO = 68mA ±VS–6* V

CURRENT TC = 25°C±10 * A

SETTLING TIME to .1% TC = 25°C, 2V step 2 * µs

SLEW RATE TC = 25°C, RL = 6Ω1.0 2.6 * * V/µs

CAPACITIVE LOAD, unity gain Full temperature range 1.5 * nF

CAPACITIVE LOAD, gain > 4 Full temperature range SOA *

POWER SUPPLY

VOLTAGE Full temperature range ±10 ±28 ±36 * ±34 ±40 V

CURRENT, quiescent TC = 25°C 2.6 10 * * mA

THERMAL

RESISTANCE, AC, junction to case4F > 60Hz 1.0 1.2 * * °C/W

RESISTANCE, DC, junction to case F < 60Hz 1.5 1.8 * * °C/W

RESISTANCE, junction to air 30 * °C/W

TEMPERATURE RANGE, case Meets full range specifications –25 +85 –55 +125 °C

PA51 • PA51A

SUPPLY VOLTAGE, +VS to –VS80V

OUTPUT CURRENT, within SOA 10A

POWER DISSIPATION, internal 97W

INPUT VOLTAGE, differential ±VS –3V

INPUT VOLTAGE, common mode ±VS

TEMPERATURE, junction1200°C

TEMPERATURE, pin solder -10s 300°C

TEMPERATURE RANGE, storage –65 to +150°C

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

PA51A

PA51

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

NOTES: * The specification of PA51A is identical to the specification for PA51 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 specified under the TYP rating applies unless otherwise noted as a test condition.

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

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

5. Full temperature range specifications are guaranteed but not 100% tested.

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

TYPICAL PERFORMANCE

GRAPHS PA51 • PA51A

0 25 50 75 100 125

TEMPERATURE, T (°C)

POWER DERATING

INTERNAL POWER DISSIPATION, P(W)

02 8

3.0

4.5

5.0

OUTPUT VOLTAGE SWING

4.0

2.5

-50CASE TEMPERATURE, T

(°C)

NORMALIZED BIAS CURRENT, I

(X)

1 100 10M

FREQUENCY, F (Hz)

–20

120 SMALL SIGNAL RESPONSE

OPEN LOOP GAIN, A

(dB)

100

0 100 .1M 10M

–210

–150

–60

0PHASE RESPONSE

–90

–30

10K 20K 50K .1M

FREQUENCY, F (Hz)

OUTPUT VOLTAGE, V (V )

30 300 1K 30K

FREQUENCY, F (Hz)

HARMONIC DISTORTION

DISTORTION (%)

.01

20 80

TOTAL SUPPLY VOLTAGE, V

(V)

1.6 QUIESCENT CURRENT

NORMALIZED QUIESCENT CURRENT, I

(X)

1.4

10 1K

FREQUENCY, F (Hz)

INPUT NOISE

TIME, (µs)

–8

PULSE RESPONSE

OUTPUT VOLTAGE, V

(V)

–4

802 1FREQUENCY, F (Hz)

COMMON MODE REJECTION

COMMON MODE REJECTION, CMR (dB)

-25 50 100

CASE TEMPERATURE, T (°C)

CURRENT LIMIT

CURRENT LIMIT, I (A)

LIM

100 3K 10K .1M

BIAS CURRENT

1.3

1.6

100

POWER RESPONSE

30K

30 40 50 60 70

1.2

025 75

10 1K 10K .1M 1M

150

10 10K 1M

FREQUENCY, F (Hz)

PHASE, (°)ϕVOLTAGE DROP FROM SUPPLY (V)

410

–6

–2

10 100 1K 10K .1M 1M

100

120

70K

.03

1.0

3.5

125

OUTPUT CURRENT, I

(A)

–180

–120

1.9

2.2

2.5

5.5

10K

PA51 R = 0.3

Ω

R = .12

Ω

= –25°C

= 25 to 85°C

–VO TC = –25 to 85°C

9.7

= ±40V

= 3 Ω

= 8 Ω

6GAIN = +1 R

= 5 Ω

INPUT NOISE VOLTAGE, V (nV/ Hz)

√

-25 0 25 50 75 100 125

= .1W

= 5W

PO = 50W

= ±36V

= 4

GAIN = 10

Ω

= 125°C

= -55°C

= 125°C

100

PA51A

OPERATING

CONSIDERATIONS

PA51 • PA51A

GENERAL

Please read Application Note 1 "General Operating Consid-

erations" which covers stability, supplies, heat sinking, mount-

ing, current limit, SOA interpretation, and specification inter-

pretation. Visit www.apexmicrotech.com for design tools that

help automate tasks such as calculations for stability, internal

power dissipation, current limit and heat sink selection. The

"Application Notes" and "Technical Seminar" sections contain

a wealth of information on specific types of applications.

Package outlines, heat sinks, mounting hardware and other

accessories are located in the "Packages and Accessories"

section. Evaluation Kits are available for most Apex product

models, consult the "Evaluation Kit" section for details. For the

most current version of all Apex product data sheets, visit

www.apexmicrotech.com.

SAFE OPERATING AREA (SOA)

The output stage of most power amplifiers has three distinct

limitations:

1. The current handling capability of the transistor geometry

and the wire bonds.

2. The second breakdown effect which occurs whenever the

simultaneous collector current and collector-emitter voltage

exceeds specified limits.

3. The junction temperature of the output transistors.

The SOA curves combine the effect of of all limits for this

Power Op Amp. 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. The following guidelines may save exten-

sive analytical efforts.

1. Under transient conditions, capacitive and dynamic* induc-

tive loads up to the following maximums are safe:

CAPACITIVE LOAD INDUCTIVE LOAD

±VSILIM = 5A ILIM = 10A ILIM = 5A ILIM = 10A

40V 400µF 200µF 11mH 4.3mH

35V 800µF 400µF 20mH 5.0mH

30V 1,600µF 800µF 35mH 6.2mH

25V 5.0mF 2.5mF 50mH 15mH

20V 10mF 5.0mF 400mH 20mH

15V 20mF 10mF ** 100mH

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

allowing the output voltage to drop more than 8V below the

supply rail with ILIM = 10A or 15V below the supply rail with

ILIM = 5A while the amplifier is current limiting, the inductor

should be capacitively coupled or the current limit must be

lowered to meet SOA criteria.

** Second breakdown effect imposes no limitation but thermal

limitations must still be observed.

2. The amplifier can handle any EMF generating or reactive

load and short circuits to the supply rail or shorts to common

if the current limits are set as follows at TC = 85°C.

SHORT TO ±VSSHORT TO

±VSC, L, OR EMF LOAD COMMON

45V 0.1A 1.3A

40V 0.2A 1.5A

35V 0.3A 1.6A

30V 0.5A 2.0A

25V 1.2A 2.4A

20V 1.5A 3.0A

15V 2.0A 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.

CURRENT LIMIT

Proper operation requires the use of two current limit

resistors, connected as shown in the external connection

diagram. The minimum value for RCL is .06 ohm, 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.

5.0

3.0

1.5

1.0

0.7

0.2515203040507080

SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE V –V (V)

OUTPUT CURRENT FROM +V OR –V (A)

0.3

0.5

7.0

710

2.0

steady state

t = 5ms

t = 1ms

T = 85°C

T = 25°C

T = 125°C

THERMAL

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.