APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
1
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 amplifiers 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 amplifiers. The
safe operating area (SOA) can be observed for all operating
conditions by selection of user programmable current limit
resistors. These amplifiers 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 film (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
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
8-PIN TO-3
PACKAGE STYLE CE
APEX MICROTECHNOLOGY CORPORATION 5980 NORTH SHANNON ROAD TUCSON, ARIZONA 85741 USA APPLICATIONS HOTLINE: 1 (800) 546-2739
2
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
PA01
PA73
PARAMETER
TEST CONDITIONS
2
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
INPUT
OFFSET VOLTAGE, initial
T
C
= 25C
5
12
*
10
mV
OFFSET VOLTAGE, vs. temperature
Full temperature range
10
65
*
*
V/C
OFFSET VOLTAGE, vs. supply
T
C
= 25C
35
*
200
V/V
OFFSET VOLTAGE, vs. power
T
C
= 25C
20
*
V/W
BIAS CURRENT, initial
T
C
= 25C
15
50
*
40
nA
BIAS CURRENT, vs. temperature
Full temperature range
.05
.4
*
*
nA/C
BIAS CURRENT, vs. supply
T
C
= 25C
.02
*
nA/V
OFFSET CURRENT, initial
T
C
= 25C
12
30
*
*
nA
OFFSET CURRENT, vs. temperature
Full temperature range
.05
*
nA/C
INPUT IMPEDANCE, common-mode
T
C
= 25C
200
*
M
INPUT IMPEDANCE, differential
T
C
= 25C
10
*
M
INPUT CAPACITANCE
T
C
= 25C
3
*
pF
COMMON MODE VOLTAGE RANGE
3
Full temperature range
V
S
6 V
S
3
*
*
V
COMMON MODE REJECTION, DC
3
T
C
= 25C, V
CM
= V
S
6V
70
110
*
*
dB
GAIN
OPEN LOOP GAIN at 10Hz
Full temp. range, full load
91
113
*
*
dB
GAIN BANDWIDTH PRODUCT @ 1MHz T
C
= 25C, full load
1
*
MHz
POWER BANDWIDTH
T
C
= 25C, I
O
= 4A, V
O
= 40V
PP
15
23
*
*
kHz
PHASE MARGIN
Full temperature range
45
*
OUTPUT
VOLTAGE SWING
3
T
C
= 25C, I
O
= 5A
V
S
10 V
S
5
V
S
8
*
V
VOLTAGE SWING
3
Full temp. range, I
O
= 2A
V
S
6 V
S
5
*
*
V
VOLTAGE SWING
3
Full temp. range, I
O
= 46mA
V
S
5
*
V
CURRENT, peak
T
C
= 25C
5
*
A
SETTLING TIME to .1%
T
C
= 25C, 2V step
2
*
s
SLEW RATE
T
C
= 25C, R
L
= 2.5
1.0
2.6
*
*
V/s
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
T
C
= 25C
20
50
2.6
5
mA
THERMAL
RESISTANCE, AC, junction to case
4
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
PA01 PA73
PA01
PA73
SUPPLY VOLTAGE, +V
S
to V
S
60V
68V
OUTPUT CURRENT, within SOA
5A
5A
POWER DISSIPATION, internal
67W
67W
INPUT VOLTAGE, differential
V
S
3V
V
S
3V
INPUT VOLTAGE, common-mode
V
S
V
S
TEMPERATURE, junction
1
200C
200C
TEMPERATURE, pin solder -10s
300C
300C
TEMPERATURE RANGE, storage
65 to +150C
65 to +150C
OPERATING TEMPERATURE RANGE, case
25 to +85C
25 to +85C
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 850C to avoid generating toxic fumes.
NOTES: * The specification of PA73 is identical to the specification for PA01 in applicable column to the left.
1. Lo
achieve high MTTF.
2. The power supply voltage specified under the TYP rating applies unless otherwise noted as a test condition.
3. +V
S
and V
S
denote the positive and negative supply rail respectively. Total V
S
is measured from +V
S
to V
S
.
4. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz.
CAUTION
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
3
TYPICAL PERFORMANCE
GRAPHS
PA01 PA73
APEX MICROTECHNOLOGY CORPORATION 5980 NORTH SHANNON ROAD TUCSON, ARIZONA 85741 USA APPLICATIONS HOTLINE: 1 (800) 546-2739
4
OPERATING
CONSIDERATIONS
PA01 PA73
GENERAL
Please read Application Note 1 "General Operating Con-
siderations" 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, in-
ternal 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 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 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.
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 T
C
= 85C.
SHORT TO V
S
SHORT TO
V
S
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
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 resis-
tors, connected as shown, in the external connection diagram.
The minimum value for R
CL
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.
1
Note 1. Power Design is a self-extracting Excel spreadsheet
available free from www.apexmicrotech.com
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.
PA01-73U REV R MARCH 2005 2005 Apex Microtechnology Corp.
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