PA01 • PA73
PA01-73U 1
PA01, PA73
FEATURES
• LOW COST, ECONOMY MODEL — PA01
• HIGH OUTPUT CURRENT — Up to ±5A PEAK
• EXCELLENT LINEARITY — PA01
• HIGH SUPPLY VOLTAGE — Up to ±30V
• ISOLATED CASE — 300V
APPLICATIONS
• MOTOR, VALVE AND ACTUATOR CONTROL
• MAGNETIC DEFLECTION CIRCUITS UP TO 4A
• POWER TRANSDUCERS UP TO 20kHz
• TEMPERATURE CONTROL UP TO 180W
• PROGRAMMABLE POWER SUPPLIES UP TO 48V
• AUDIO AMPLIFIERS UP TO 50W RMS
DESCRIPTION
The PA01 and PA73 are high voltage, high output current
operational ampliers designed to drive resistive, inductive
and capacitive loads. For optimum linearity, the PA01 has a
class A/B output stage. The PA73 has a simple class C output
stage (see Note 1) to reduce cost for motor control and other
applications where crossover distortion is not critical and
to provide interchangeability with type 3573 ampliers. The
safe operating area (SOA) can be observed for all operating
conditions by selection of user programmable current limit
resistors. These ampliers are internally compensated for all
gain settings. For continuous operation under load, a heatsink
of proper rating is recommended.
This hybrid integrated circuit utilizes thick lm (cermet)
resistors, ceramic capacitors and semiconductor chips to
maximize reliability, minimize size and give top performance.
Ultrasonically bonded aluminum wires provide reliable inter-
connections at all operating temperatures. The 8-pin TO-3
package is hermetically sealed and electrically isolated. The
use of compressible thermal washers and/or improper mount-
ing torque will void the product warranty. Please see “General
Operating Considerations”.
EXTERNAL CONNECTIONS
CL+ +VS
+IN
–IN
–VS
N.C.
CL–
OUT
TOP VIEW
RCL+
RCL-
OUTPUT
1
23
4
5
6
7
8
NOTE 1: * Indicates not used in PA73. Open base of Q2A
connected to output of A1.
TYPICAL APPLICATION
Unidirectional Optical Speed Control
The pulse output of a non-contact optical sensor drives a
voltage-to-frequency converter which generates feedback for
the op amp. With the loop closed in this manner, the op amp
corrects for any variations in the speed due to changing load.
Because of operation in only one direction, an unsymmetrical
supply is used to maximize efficiency of both power op amp
and power supply. High speed diodes at the input protect the
op amp from commutator noise which may be generated by
the motor.
EQUIVALENT SCHEMATIC
24V
.33Ω
3W
–30V
+6V
CF
RIN
PA01
RF
F/V
OPTO
PULSE
GEN.
RCL–
.33Ω
3W
RCL+
VIN
0/–5V
M
0/+5V
1N4148
UNSYMMETRICAL SUPPLIES FOR EFFICIENCY
3
4
5
6
2
1
8
A1
D1
Q1
Q4
Q3
Q5
C1
Q2A
Q2B
Q6B
Q6A
*
*
*
*
*
*
8-PIN TO-3
PACKAGE STYLE CE
PA01 • PA73
Power Operational Amplifier
Copyright © Apex Microtechnology, Inc. 2012
(All Rights Reserved)
www.apexanalog.com SEP 2012
PA01-73U REVY
PA01 • PA73
2 PA01-73U
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
PA01 PA73
PARAMETER TEST CONDITIONS 2 MIN TYP MAX MIN TYP MAX UNITS
INPUT
OFFSET VOLTAGE, initial TC = 25°C ±5 ±12 * ±10 mV
OFFSET VOLTAGE, vs. temperature Full temperature range ±10 ±65 * * µV/°C
OFFSET VOLTAGE, vs. supply TC = 25°C ±35 * ±200 µV/V
OFFSET VOLTAGE, vs. power TC = 25°C ±20 * µV/W
BIAS CURRENT, initial TC = 25°C ±15 ±50 * ±40 nA
BIAS CURRENT, vs. temperature Full temperature range ±.05 ±.4 * * nA/°C
BIAS CURRENT, vs. supply TC = 25°C ±.02 * nA/V
OFFSET CURRENT, initial TC = 25°C ±12 ±30 * * nA
OFFSET CURRENT, vs. temperature Full temperature range ±.05 * nA/°C
INPUT IMPEDANCE, common-mode TC = 25°C 200 * MΩ
INPUT IMPEDANCE, differential TC = 25°C 10 * MΩ
INPUT CAPACITANCE TC = 25°C 3 * pF
COMMON MODE VOLTAGE RANGE3 Full temperature range ±VS–6 ±VS–3 * * V
COMMON MODE REJECTION, DC3 TC = 25°C, VCM = VS –6V 70 110 * * dB
GAIN
OPEN LOOP GAIN at 10Hz Full temp. range, full load 91 113 * * dB
GAIN BANDWIDTH PRODUCT @ 1MHz TC = 25°C, full load 1 * MHz
POWER BANDWIDTH TC = 25°C, IO = 4A, VO = 40VPP 15 23 * * kHz
PHASE MARGIN Full temperature range 45 * °
OUTPUT
VOLTAGE SWING3 TC = 25°C, IO = 5A ±VS–10 ±VS–5 ±VS–8 * V
VOLTAGE SWING3 Full temp. range, IO = 2A ±VS–6 ±VS–5 * * V
VOLTAGE SWING3 Full temp. range, IO = 46mA ±VS–5 * V
CURRENT, peak TC = 25°C ±5 * A
SETTLING TIME to .1% TC = 25°C, 2V step 2 * µs
SLEW RATE TC = 25°C, RL = 2.5Ω 1.0 2.6 * * V/µs
CAPACITIVE LOAD, unity gain Full temperature range 1 * nF
CAPACITIVE LOAD, gain > 4 Full temperature range SOA *
POWER SUPPLY
VOLTAGE Full temperature range ±10 ±28 ±28 * * ±30 V
CURRENT, quiescent TC = 25°C 20 50 2.6 5 mA
THERMAL
RESISTANCE, AC, junction to case4 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 specications –25 25 +85 * * * °C
PA01 PA73
SUPPLY VOLTAGE, +VS to –VS 60V 68V
OUTPUT CURRENT, within SOA 5A 5A
POWER DISSIPATION, internal 67W 67W
INPUT VOLTAGE, differential ±37V ±37V
INPUT VOLTAGE, common-mode ±VS ±VS
TEMPERATURE, junction1 200°C 200°C
TEMPERATURE, pin solder -10s 350°C 350°C
TEMPERATURE RANGE, storage –65 to +150°C –65 to +150°C
OPERATING TEMPERATURE RANGE, case –25 to +85°C –25 to +85°C
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.
NOTES: * The specication of PA73 is identical to the specication for PA01 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 specied 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.
CAUTION
PA01 • PA73
PA01-73U 3
10K 20K 50K .1M
FREQUENCY, F (Hz)
4.6
OUTPUT VOLTAGE, VO (VPP)
POWER RESPONSE
30K 70K
6.8
10
15
22
32
46
68
100
|+VS | + |-VS | = 60V
1 100 10M
FREQUENCY, F (Hz)
–20
0
60
120
SMALL SIGNAL RESPONSE
OPEN LOOP GAIN, AOL (dB)
20
40
80
100
10 1K 10K .1M 1M
1 10K
FREQUENCY, F (Hz)
0
COMMON MODE REJECTION
COMMON MODE REJECTION, CMR (dB)
40
80
120
.1M10 100 1K 1M
20
60
100
1 100 .1M 10M
–140
–100
–40
0
PHASE RESPONSE
–60
–20
1K10 10K 1M
FREQUENCY, F (Hz)
PHASE, Φ (°)
–120
–80
–180
–160
10 100 10K .1M
FREQUENCY, F (Hz)
INPUT NOISE VOLTAGE, VN (nV/ Hz)
INPUT NOISE
1K
10
20
30
40
50
70
100
0 20 40 60 80 100 120
TEMPERATURE, T(°C)
0
10
30
50
POWER DERATING
INTERNAL POWER DISSIPATION, P(W)
20
70
140
40
60
C
T = T
A
T = T
–50 0 100
1.0
2.2
2.5
BIAS CURRENT
1.6
.7
–25 25 50 75
1.9
NORMALIZED BIAS CURRENT, IB (X)
125
1.3
CASE TEMPERATURE, TC (°C)
.4 –50 –25 50 100
CASE TEMPERATURE, TC (°C)
0
3.0
CURRENT LIMIT
CURRENT LIMIT, ILIM (A)
2.5
0 25 75
1.0
1.5
.5
2.0
125
3.5
RCL = 0.3Ω
RCL = 0.6Ω
0
TIME, t (µs)
PULSE RESPONSE
OUTPUT VOLTAGE, VO (V)
–8
2 4 6 8 10 12
–6
–4
–2
0
2
4
6
8
VIN = ±5V, tR = 100ns
PA01
∆ for PA73
100 1K 3K .1M
FREQUENCY, F (Hz)
.003
.3
3
HARMONIC DISTORTION
DISTORTION (%)
.01
.1
1
300 10K 30K
.03
PA73 @ PO = 32W
PA73 @ P
O
= 50mW
PA01 @ PO = 50mW
PA01 @ PO = 32W
VS = ±28V
RL = 8Ω
AV = 10
20 80
TOTAL SUPPLY VOLTAGE, VS (V)
.7
.8
1.3
QUIESCENT CURRENT
NORMALIZED, IQ (X)
.9
1.2
30 40 50 60 70
1.1
1.0
PA01 @ –25° to +25°C
PA73 @ –25° to +85°C
PA01 @ 85°C
PA01 • PA73
4 PA01-73U
GENERAL
Please read Application Note 1 "General Operating Con-
siderations" which covers stability, supplies, heat sinking,
mounting, current limit, SOA interpretation, and specication
interpretation. Visit www.apexanalog.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 specic types of applications. Package
outlines, heat sinks, mounting hardware and other accessories
are located in the "Packages and Accessories" section. Evalu-
ation Kits are available for most Apex Precision Power product
models, consult the "Evaluation Kit" section for details. For the
most current version of all Apex Microtechnology product data
sheets, visit www.apexanalog.com.
SAFE OPERATING AREA (SOA)
The output stage of most power ampliers 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 specied limits.
3. The junction temperature of the output transistors.
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.
1. For sine wave outputs, use Power Design1 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 ampliers with wide common mode rejection ranges.
2. EMF generating or reactive load and short circuits to the
supply rail or shorts to common are safe if the current limits
are set as follows at TC = 85°C.
SHORT TO ±VS SHORT TO
±VS C, L, OR EMF LOAD COMMON
34V .58A 1.1A
30V .46A 1.4A
25V .61A 1.7A
20V .86A 2.1A
15V 1.3A 2.9A
3. The output stage is protected against occaisional transient
yback. However, for protection against sustained, high
energy yback, external fast-recovery diodes should be
used.
CURRENT LIMIT
Proper operation requires the use of two current limit resis-
tors, connected as shown, in the external connection diagram.
The minimum value for RCL is 0.12 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.
10 15 20 25 30 35 40 50 60
.3
.4
.6
.8
1.0
1.5
2.0
3.0
4.0
5.0
Tc = 85°C
Tc = 125°C
THERMAL
steady state SECOND BREAKDOWN
t = 1ms
t = 5ms
t = 0.5ms
PA01 LIMIT
1 Note 1. Power Design is a self-extracting Excel spreadsheet
available free from www.apexanalog.com
PA01 • PA73
PA01-73U 5
NEED TECHNICAL HELP? CONTACT APEX SUPPORT!
For all Apex Microtechnology product questions and inquiries, call toll free 800-546-2739 in North America.
For inquiries via email, please contact apex.support@apexanalog.com.
International customers can also request support by contacting their local Apex Microtechnology Sales Representative.
To nd the one nearest to you, go to www.apexanalog.com
IMPORTANT NOTICE
Apex Microtechnology, Inc. has made every effort to insure the accuracy of the content contained in this document. However, the information is subject to change
without notice and is provided "AS IS" without warranty of any kind (expressed or implied). Apex Microtechnology reserves the right to make changes without further
notice to any specications or products mentioned herein to improve reliability. This document is the property of Apex Microtechnology and by furnishing this informa-
tion, Apex Microtechnology grants no license, expressed or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual
property rights. Apex Microtechnology owns the copyrights associated with the information contained herein and gives consent for copies to be made of the informa-
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APEX MICROTECHNOLOGY PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN PRODUCTS USED FOR
LIFE SUPPORT, AUTOMOTIVE SAFETY, SECURITY DEVICES, OR OTHER CRITICAL APPLICATIONS. PRODUCTS IN SUCH APPLICATIONS ARE UNDER-
STOOD TO BE FULLY AT THE CUSTOMER OR THE CUSTOMER’S RISK.
Apex Microtechnology, Apex and Apex Precision Power are trademarks of Apex Microtechnolgy, Inc. All other corporate names noted herein may be trademarks
of their respective holders.
Copyright © Apex Microtechnology, Inc. 2012
(All Rights Reserved)
www.apexanalog.com SEP 2012
PA01-73U REVY
