CIRRUS PA07A

PA07PA07
• PA07A
• PA07A
PA07,
P r o d u c t IPA07A
Innnnoovvaa t i o n FFr roomm
FET Input Power Operational Amplifier
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
8-pin TO-3
PACKAGE STYLE CE
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
TYPICAL APPLICATION
CL
RL
R F1
R F2
PA07
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 thermistor
compensated base-emitter voltage multiplier circuit. A thermal
shutoff circuit protects against overheating and minimizes
heatsink requirements for abnormal operating conditions. The
safe operating area (SOA) 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, a heatsink
of proper rating is recommended.
This hybrid 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 interconnections at all operating
temperatures. The 8-pin TO-3 package is hermetically 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
3
7
Q2
D1
Q3
C1
Q6B
+V
–32V
–V
PD1
C3
Q10
4
Q12A
Q11
Q19
Q12B
Q15
OUT
1
OUTPUT
4
TOP VIEW
RS
Q16
Q18
+IN
Q17B
Q17A
2
3
RT
R CL+
CL+
+VS
8
C4
D3
PD2
Negates optoelectronic instabilities
Lead network minimizes overshoot
SEQUENTIAL POSITION CONTROL
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 momentary 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.
Q7
1
5
LIGHT
.68Ω
2
C2
Q9
MOTOR
R CL–
EXTERNAL CONNECTIONS
Q6A
Q4
Q5
Q8
V = 28
EMF = 14V
R W = 14Ω
.68Ω
DESCRIPTION
Q1
CF
R CL+
+32V
–IN
R CL–
5
–VS
D2
6
6
8
CL–
7
BAL
RS= ( VS+ + –VS ) RT/1.6
NOTE: Input offset voltage trim optional. RT = 10KΩ MAX
PA07U
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
MAY 20091
APEX − PA07UREVP
PA07 • PA07A
P r o d u c t I n n o v a t i o nF r o m
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, +VS to –VS
OUTPUT CURRENT, within SOA
POWER DISSIPATION, internal1
INPUT VOLTAGE, differential
INPUT VOLTAGE, common mode
TEMPERATURE, pin solder - 10s
TEMPERATURE, junction1
TEMPERATURE RANGE, storage
OPERATING TEMPERATURE RANGE, case
SPECIFICATIONS
PARAMETER
TEST CONDITIONS 2
INPUT
OFFSET VOLTAGE, initial
OFFSET VOLTAGE, vs. temperature
OFFSET VOLTAGE, vs. supply
OFFSET VOLTAGE, vs. power
BIAS CURRENT, initial3
BIAS CURRENT,vs. supply
OFFSET CURRENT, initial3
INPUT IMPEDANCE, DC
INPUT CAPACITANCE
COMMON MODE VOLTAGE RANGE4
COMMON MODE REJECTION, DC
TC = 25°C
Full temperature range
TC = 25°C
Full temperature range
TC = 25°C
TC = 25°C
TC = 25°C
TC = 25°C
TC = 25°C
Full temperature range
Full temperature range, VCM = ±20V
GAIN
OPEN LOOP GAIN at 15Hz
GAIN BANDWIDTH PRODUCT @ 1MHz
POWER BANDWIDTH
PHASE MARGIN
TC = 25°C, RL = 15Ω
TC = 25°C, RL = 15Ω
TC = 25°C, RL = 15Ω
Full temperature range, RL = 15Ω
OUTPUT
VOLTAGE SWING4
VOLTAGE SWING4
VOLTAGE SWING4
CURRENT, peak
SETTLING TIME to .1%
SLEW RATE
CAPACITIVE LOAD, unity gain
CAPACITIVE LOAD, gain>4
Full temp. range, IO = 5A
Full temp. range, IO = 2A
Full temp. range, IO = 90mA
TC = 25°C
TC = 25°C, 2V step
TC = 25°C
Full temperature range
Full temperature range
POWER SUPPLY
VOLTAGE
CURRENT, quiescent
Full temperature range
TC = 25°C
THERMAL
RESISTANCE, AC, junction to case5
RESISTANCE, DC, junction to case
RESISTANCE, junction to air
TEMPERATURE RANGE, case
MIN
±VS–10
89
±VS–5
±VS–5
±VS–5
5
±12
F>60Hz
F<60Hz
Meets full range specifications
–25
PA07
TYP
.5
10
8
20
5
.01
2.5
1011
4
120
95
1.3
18
70
100V
5A
67W
±50V
±VS
300°C
200°C
–65 to +150°C
–55 to +125°C
PA07A
MAX
MIN TYP
MAX
±2
±.25
±.5
30
5
10
*
10
50
3
10
*
50
1.5
10
*
*
*
*
mV
µV/°C
µV/V
µV/W
pA
pA/V
pA
Ω
pF
V
dB
*
*
*
*
dB
MHz
kHz
°
*
*
*
*
*
*
1
*
SOA
*
V
V
V
A
µs
V/µs
nF
±35
18
±50
*
30
*
*
V
mA
1.9
2.4
30
25
2.1
2.6
+85
*
*
*
*
*
*
*
*
1.5
5
*
UNITS
*
*
°C/W
°C/W
°C/W
°C
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. +VS and –VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to –VS.
5. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz.
CAUTION
2
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.
PA07U
PA07 • PA07A
40
30
20
10
T = TA
0
0
1
.25
.06
–15
80
–60
PHASE, Ф (°)
–30
60
40
20
–210
COMMON MODE REJECTION
OUTPUT VOLTAGE, VO (VP-P)
100
80
60
40
20
0
1
10K .1M
100 1K
FREQUENCY, F (Hz)
10
HARMONIC DISTORTION
10
G =10
PA07U
8Ω
=
L
L
.01
100
L
R
V,
36
=
S
,V
W
60
=
P
O
=
O
P
.03
V,
W
25
m
=
S
,V
O
P
50
.1
W
=
50
.3
R
,R
=
1
=
8Ω
4Ω
3
300
1K
3K 10K 30K
FREQUENCY, F (Hz)
.1M
1
10
.5
0
–50
–25
50
0
25
75 100
CASE TEMPERATURE, TC (°C)
POWER RESPONSE
4
2
0
–2
–4
–6
0
2
4
6
8
TIME, t (µs)
10
32
22
15
10
6.8
T C = –25C
1.2
1.0
.8
.6
.4
40
T C = 25C
T C = 85C
C
T C = 125
50
60
70
80
90
100
TOTAL SUPPLY VOLTAGE, VS (V)
INPUT NOISE
10
QUIESCENT CURRENT
1.4
20K 30K
50K 70K .1M
FREQUENCY, F (Hz)
20
12
1.6
|+VS| + |-VS| = 70V
46
4.6
10K
100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
VIN = 5V, tr = 100ns
|+VS| + |-VS| = 100V
68
PULSE RESPONSE
6
–8
1M
RCL = 0.6Ω
1.0
100
8
NORMALIZED QUIESCENT CURRENT, IQ (X)
120
100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
1.5
PHASE RESPONSE
–150
–20
RCL = 0.3Ω
2.0
105
–120
–180
10
45
65
85
25
TEMPERATURE, TC (°C)
–90
0
1
5
0
100
OPEN LOOP GAIN, AOL (dB)
COMMON MODE REJECTION, CMR (dB)
4
SMALL SIGNAL RESPONSE
120
DISTORTION, THD (%)
16
20 40 60 80 100 120 140
TEMPERATURE, TC (°C)
2.5
CURRENT LIMIT, ILIM (A)
50
64
OUTPUT VOLTAGE, VO (VP-P)
T = TC
CURRENT LIMIT
3.0
INPUT NOISE VOLTAGE, VN (nV/√Hz)
60
BIAS CURRENT
256
VOLTAGE DROP FROM SUPPLY, VSAT (V)
POWER DERATING
70
NORMALIZED BIAS CURRENT, IB (X)
INTERNAL POWER DISSIPATION, P (W)
P r o d u c t I n n o v a t i o nF r o m
6
4
2
10
1K
100
10K
FREQUENCY, F (Hz)
.1M
OUTPUT VOLTAGE SWING
6
5
TC =
°C
–25
4
TC =
3
TC =
2
25°C
85°C
1
0
0
2
3
1
4
5
OUTPUT CURRENT, IO (A)
6
3
PA07 • PA07A
P r o d u c t I n n o v a t i o nF r o m
GENERAL
Please read Application Note 1 "General Operating Considerations" which covers stability, supplies, heat sinking,
mounting, current limit, SOA interpretation, and specification
interpretation. Visit www.Cirrus.com for design tools that help
automate tasks such as calculations for stability, internal power
dissipation, current limit; heat sink selection; Apex Precision
Power’s complete Application Notes library; Technical Seminar
Workbook; 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 voltage
exceed specified limits.
3. The junction temperature of the output transistors.
OUTPUT CURRENT FROM +VS OR – VS (A)
5.0
4.0
3.0
2.0
1.5
Tc
=8
Tc
5°C
=1
TH
25
ER
ste
°C
MA
L
ad
ys
t=
ta
te
SE
5m
CO
s
ND
t= t=
1m 0 . 5
s ms
BR
EA
1.0
.8
KD
OW
N
.6
.4
.3
.2
10
15
20
25 30 35 40
50 60 70 80 100
SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE VS – VO (V)
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 conditions, check worst case stress levels against the new SOA
graph.
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 amplifiers with wide common mode rejection ranges.
4
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 TC = 85°C:
SHORT TO ±VS
SHORT TO
C, L, OR EMF LOAD
COMMON
±VS
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 therefore
does not protect the amplifier against transient SOA violations
(areas outside of the TC = 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 resistors, connected as shown in the external connections diagram.
The minimum value for RCL is .12Ω, 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.
Note 1. Power Design is a self-extracting Excel spreadsheet
available free from www.Cirrus.com
1
PA07U
P r o d u c t I n n o v a t i o nF r o m
PA07 • PA07A
Contacting Cirrus Logic Support
For all Apex Precision Power product questions and inquiries, call toll free 800-546-2739 in North America.
For inquiries via email, please contact [email protected]
International customers can also request support by contacting their local Cirrus Logic Sales Representative.
To find the one nearest to you, go to www.cirrus.com
IMPORTANT NOTICE
Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject
to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant
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does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE
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PA07U
5