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. R
T
= 10K
MAX
8-pin TO-3 package
CL+
+V
+IN
IN
V
BAL
CL
OUT
S
S
TOP VIEW
R
CL+
R
CL
R
T
R
S
OUTPUT
R
S
= ( V
S
+ + V
S
) R
T
/1.6
1
2
3
4
5
6
7
8
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
R
CL+
R
CL
C
L
C
F
R
L
R
F2
R
F1
+32V
.68
.68
32V
+V
V
PD1
PD2
LIGHT
V = 28
EMF = 14V
R = 14
PA07
W
Negates optoelectronic instabilities
Lead network minimizes overshoot
SEQUENTIAL POSITION CONTROL
3
7
5
4
6
2
1
8
Q1
Q2
Q5
Q4
Q3
Q8
Q9
C3
Q12A
Q12B
Q10
Q15
Q18
D2
D3
D1
C2
C4
Q11
Q16
Q19
C1
Q7
Q6A
Q6B
Q17A
Q17B
H T T P : / / W W W . A P E X M I C R O T E C H . C O M ( 8 0 0 ) 5 4 6 - A P E X ( 8 0 0 ) 5 4 6 - 2 7 3 9
M I C R O T E C H N O L O G Y
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
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, +V
S
to V
S
100V
OUTPUT CURRENT, within SOA
5A
POWER DISSIPATION, internal
1
67W
INPUT VOLTAGE, differential
50V
INPUT VOLTAGE, common mode
V
S
TEMPERATURE, pin solder - 10s
300
C
TEMPERATURE, junction
1
200
C
TEMPERATURE RANGE, storage
65 to +150
C
OPERATING TEMPERATURE RANGE, case 55 to +125
C
PARAMETER
TEST CONDITIONS
2
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
INPUT
OFFSET VOLTAGE, initial
T
C
= 25
C
.5
2
.25
.5
mV
OFFSET VOLTAGE, vs. temperature
Full temperature range
10
30
5
10
V/
C
OFFSET VOLTAGE, vs. supply
T
C
= 25
C
8
*
V/V
OFFSET VOLTAGE, vs. power
Full temperature range
20
10
V/W
BIAS CURRENT, initial
3
T
C
= 25
C
5
50
3
10
pA
BIAS CURRENT,vs. supply
T
C
= 25
C
.01
*
pA/V
OFFSET CURRENT, initial
3
T
C
= 25
C
2.5
50
1.5
10
pA
INPUT IMPEDANCE, DC
T
C
= 25
C
10
11
*
INPUT CAPACITANCE
T
C
= 25
C
4
*
pF
COMMON MODE VOLTAGE RANGE
4
Full temperature range
V
S
10
*
V
COMMON MODE REJECTION, DC
Full temperature range, V
CM
=
20V
120
*
dB
GAIN
OPEN LOOP GAIN at 10Hz
T
C
= 25
C, R
L
= 15
92
98
*
*
dB
GAIN BANDWIDTH PRODUCT @ 1MHz T
C
= 25
C, R
L
= 15
1.3
*
MHz
POWER BANDWIDTH
T
C
= 25
C, R
L
= 15
18
*
kHz
PHASE MARGIN
Full temperature range, R
L
= 15
70
*
OUTPUT
VOLTAGE SWING
4
Full temp. range, I
O
= 5A
V
S
5
*
V
VOLTAGE SWING
4
Full temp. range, I
O
= 2A
V
S
5
*
V
VOLTAGE SWING
4
Full temp. range, I
O
= 90mA
V
S
5
*
V
CURRENT, peak
T
C
= 25
C
5
*
A
SETTLING TIME to .1%
T
C
= 25
C, 2V step
1.5
*
s
SLEW RATE
T
C
= 25
C
5
*
V/
s
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
T
C
= 25
C
18
30
*
*
mA
THERMAL
RESISTANCE, AC, junction to case
5
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
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.
+V
S
and V
S
denote the positive and negative supply rail respectively. Total V
S
is measured from +V
S
to V
S
.
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
0
10
30
50
POWER DERATING
INTERNAL POWER DISSIPATION, P(W)
15
25
105
.06
1
64
256
BIAS CURRENT
4
.25
10
100
10K
.1M
FREQUENCY, F (Hz)
INPUT NOISE VOLTAGE, V (nV/ Hz)
1
100
10M
FREQUENCY, F (Hz)
20
0
60
120
SMALL SIGNAL RESPONSE
OPEN LOOP GAIN, A (dB)
20
40
80
100
1
100
.1M
10M
180
150
60
0
PHASE RESPONSE
90
30
10K
20K
50K
.1M
FREQUENCY, F (Hz)
4.6
OUTPUT VOLTAGE, V (V )
O
100
1K
3K
.1M
FREQUENCY, F (Hz)
.3
3
HARMONIC DISTORTION
DISTORTION, THD (%)
.01
.1
1
40
100
TOTAL SUPPLY VOLTAGE, V
S
(V)
.4
.6
1.6
QUIESCENT CURRENT
NORMALIZED QUIESCENT CURRENT, I (X)
.8
1.4
0
2
3
6
OUTPUT CURRENT, I (A)
0
2
6
OUTPUT VOLTAGE SWING
VOLTAGE DROP FROM SUPPLY, V (V)
SAT
3
5
1
10K
FREQUENCY, F (Hz)
0
COMMON MODE REJECTION
COMMON MODE REJECTION, CMR (dB)
40
80
120
.1M
10
100
0
TIME, t (s)
PULSE RESPONSE
OUTPUT VOLTAGE, V (V )
50
25
50
100
CASE TEMPERATURE, T
C
(C)
0
3.0
CURRENT LIMIT
CURRENT LIMIT, I (A)
LIM
2.5
300
10K
30K
O
1
5
1
INPUT NOISE
1K
2
10
20
4
6
N
1K
5
45
65
85
16
20
70
POWER RESPONSE
PP
30K
50
60
70
80
90
1.2
0
25
75
1.0
1.5
8
10
1K
10K .1M 1M
140
40
60
T = T
C
T = T
A
10
10K
1M
FREQUENCY, F (Hz)
PHASE, (
)
TEMPERATURE, T (C)
NORMALIZED BIAS CURRENT, I (X)
B
.5
2.0
R = 0.6
CL
R = 0.3
CL
1K
1M
20
60
100
2
4
6
8
10 12
6
4
2
0
2
4
6
8
OP
P
70K
6.8
10
15
22
32
46
68
100
V = 5V, t = 100ns
IN
r
|+V | + |-V | = 100V
S
S
|+V | + |-V | = 70V
S
S
.03
P = 60W, V = 36V, R = 8
O
S
L
P = 50W, V = 25V, R = 4
O
S
L
P = 50mW
, R = 8
O
L
4
4
T = 25
C
C
T = 85
C
C
T =
25
C
C
1.0
Q
T = 25
C
C
T = 25C
C
T = 85
C
C
T = 125
C
C
C
TEMPERATURE, T
C
(C)
OL
120
210
G =10
10
APEX MICROTECHNOLOGY CORPORATION 5980 NORTH SHANNON ROAD TUCSON, ARIZONA 85741 USA APPLICATIONS HOTLINE: 1 (800) 546-2739
OPERATING
CONSIDERATIONS
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; heat sink selection; Apex's
complete Application Notes library; Technical Seminar Work-
book; and Evaluation Kits.
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. For DC outputs, especially those resulting from fault condi-
tions, check worst case stress levels against the new SOA
graph.
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.
Tc = 125
C
THERMAL
steady state SECOND BREAKDOWN
t = 1ms
t = 5
ms
t = 0.5ms
.2
.3
.4
.6
.8
1.0
1.5
2.0
3.0
4.0
5.0
10
15
20
25
30 35 40
50
60 70 80
100
Tc =
85
C
SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE V
S
V
O
(V)
OUTPUT CURRENT FROM +V
S
OR
V
S
(A)
PA07 PA07A
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 T
C
= 85
C:
SHORT TO
V
S
SHORT TO
V
S
C, L, OR EMF LOAD
COMMON
50V
.21A
.61A
40V
.3A
.87A
30V
.46A
1.4A
20V
.87A
2.5A
15V
1.4A
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.
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 T
C
= 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 R
CL
is .12
, 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.
PA07U REV. L FEBRUARY 2001
2001 Apex Microtechnology Corp.
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