Apex PA51, PA51A Datasheet

MICROTECHNOLOGY

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

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

POWER OPERATIONAL AMPLIFIERS

PA51 • PA51A

• 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 criti­cal. These amplifiers are not recommended for audio, trans­ducer 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. Ultrasoni­cally bonded aluminum wires provide reliable interconnec­tions at all operating temperatures. The 8-pin TO-3 package is
electrically isolated and hermetically sealed. The use of com­pressible thermal washers and/or improper mounting torque
will void the product warranty. Please see “General Operating
Considerations”.

TYPICAL APPLICATION

C1

R3

.1 Ω

R4

.1 Ω

0/6A

IN

M

R5
.5 Ω

0/+5V

DAC

+10V

R1

4.16K
R2

2.5K

MOTOR CURRENT IS A FUNCTION OF V

PROGRAMMABLE TORQUE CIRCUIT

PA51

–28V

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 auto­matically compensated.

EXTERNAL CONNECTIONS

R

EQUIVALENT SCHEMATIC

3

Q1A

Q3

4

A1

5

Q4

C1

Q6A

6

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

Q1B

2

1

8

Q6B

+IN

–IN

+V

4

5

S

–V

3

S

TOP VIEW

6

2

7

N.C.

CL+

OUT

1

8

CL–

CL+

OUTPUT

R

CL–

PA51 • PA51A

ABSOLUTE MAXIMUM RATINGS

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

SUPPLY VOLTAGE, +VS to –V
OUTPUT CURRENT, within SOA 10A

S

80V

POWER DISSIPATION, internal 97W
INPUT VOLTAGE, differential ±VS –3V
INPUT VOLTAGE, common mode ±V
TEMPERATURE, junction

1

S

200°C
TEMPERATURE, pin solder -10s 300°C
TEMPERATURE RANGE, storage –65 to +150°C
OPERATING TEMPERATURE RANGE, case –55 to +125°C

SPECIFICATIONS

PARAMETER TEST CONDITIONS

PA51

2, 5

MIN TYP MAX MIN TYP MAX UNITS

PA51A

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, DC

3

TC = 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 = 40V
PHASE MARGIN Full temperature range 45 * °

PP

10 16 * * kHz

OUTPUT

VOLTAGE SWING
VOLTAGE SWING
VOLTAGE SWING

3
3
3

TC = 25°C, IO = 10A ±VS–8 ±VS–5** V
Full temp. range, IO = 4A ±VS–6 ±VS–4** V

Full 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 = 6Ω 1.0 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 case

4

F > 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

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.

CAUTION

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

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.