CIRRUS PA83

PA83PA83
• PA83A
• PA83A
P r o d u c t IPA83A
Innnnoovvaa t i o n FFr roomm
PA83,
High Voltage Power Operational Amplifiers
FEATURES
• LOW BIAS CURRENT, LOW NOISE — FET Input
• FULLY PROTECTED INPUT — Up to ±150V
• WIDE SUPPLY RANGE — ±15V to ±150V
APPLICATIONS
• HIGH VOLTAGE INSTRUMENTATION
• ELECTROSTATIC TRANSDUCERS & DEFLECTION
• PROGRAMMABLE POWER SUPPLIES UP TO 290V
• ANALOG SIMULATORS
8-pin TO-3
PACKAGE STYLE CE
100K
+150V
DESCRIPTION
The PA83 is a high voltage operational amplifier designed
for output voltage swings up to ±145V with a dual (±) supply or
290V with a single supply. Its input stage is protected against
transient and steady state overvoltages up to and including
the supply rails. High accuracy is achieved with a cascode
input circuit configuration. All internal biasing is referenced
to a zener diode fed by a FET constant current source. As
a result, the PA83 features an unprecedented supply range
and excellent supply rejection. The output stage is biased in
the class A/B mode for linear operation. Internal phase compensation assures stability at all gain settings without need
for external components. Fixed current limits protect these
amplifiers against shorts to common at supply voltages up to
120V. For operation into inductive loads, two external flyback
pulse protection diodes are recommended. However, a heatsink
may be necessary to maintain the proper case temperature
under normal operating conditions.
This hybrid circuit utilizes beryllia (BeO) substrates, thick
(cermet) film resistors, ceramic capacitors and silicon 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 thermal isolation washers and/or
improper mounting torque voids product warranty. Please see
Application Note 1 “General Operating Considerations”.
3.57K
GATED
OSCILLATOR
A1
PA83
±5V
–150V
I=
∆V * C
∆t
SIMPLE PIEZO ELECTRIC TRANSDUCER DRIVE
TYPICAL APPLICATION
While piezo electric transducers present a complex impedance, they are often primarily capacitive at useful frequencies. Due to this capacitance, the speed limitation for a given
transducer/amplifier combination may well stem from limited
current drive rather than power bandwidth restrictions. With
its drive capability of 75mA, the PA83 can drive transducers
having up to 2nF of capacitance at 40kHz at maximum output
voltage. In the event the transducer may be subject to shock
or vibration, flyback diodes, voltage clamps or other protection
networks must be added to protect the amplifier from high
voltages which may be generated.
EQUIVALENT SCHEMATIC
4
2
C1
EXTERNAL CONNECTIONS
D1
3
BAL
BAL
+VS
3
Q4
2
1
Q5
OUTPUT
Q8
5
+IN
C3
C2
4
TOP VIEW
–IN
Q3
Q2
Q1
C5
6
8
7
–VS
N.C.
Q9
C4
Q10
Q12B
Q11
1
Q12A
5
Q13
Q14
NOTE:
1. Pin 8 not internally connected.
2. Input offset trimpot optional.
Recommended value of 100KΩ.
PA83U
http://www.cirrus.com
Q6
Q7
6
Q16
Q17
Q15
C6
D2
7
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
MAY 20091
APEX − PA83UREVQ
PA83 • PA83A
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, internal at TC = 25°C1
INPUT VOLTAGE, differential
INPUT VOLTAGE, common mode
TEMPERATURE, pin solder - 10s max (solder)
TEMPERATURE, junction
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. time
BIAS CURRENT, initial3
BIAS CURRENT, vs. supply
OFFSET CURRENT, initial3
OFFSET CURRENT, vs. supply
INPUT IMPEDANCE, DC
INPUT CAPACITANCE
COMMON MODE VOLTAGE RANGE4
COMMON MODE REJECTION, DC
TC = 25°C
Full temperature range
TC = 25°C
TC = 25°C
TC = 25°C
TC = 25°C
TC = 25°C
TC = 25°C
TC = 25°C
Full temperature range
Full temperature range
Full temperature range
GAIN
OPEN LOOP GAIN at 10Hz
UNITY GAIN CROSSOVER FREQ.
POWER BANDWIDTH
PHASE MARGIN
TC = 25°C, RL = 2KΩ
TC = 25°C, RL = 2KΩ
TC = 25°C, RL = 10KΩ
Full temperature range
OUTPUT
VOLTAGE SWING4, full load
VOLTAGE SWING4
CURRENT, peak
CURRENT, short circuit
SLEW RATE6
CAPACITIVE LOAD, unity gain
CAPACITIVE LOAD, gain > 4
SETTLING TIME to .1%
Full temp. range, IO = 75mA
Full temp. range, IO = 15mA
TC = 25°C
TC = 25°C
TC = 25°C, RL = 2KΩ
Full temperature range
Full temperature range
TC = 25°C, RL = 2KΩ, 10V step
POWER SUPPLY
VOLTAGE
CURRENT, quiescent
TC = –55°C to +125°C
TC = 25°C
THERMAL
RESISTANCE, AC, junction to case5
RESISTANCE, DC, junction to case
RESISTANCE, case to air
TEMP. RANGE, case (PA83/PA83A)
MIN
±VS–10
PA83A
MAX
MIN TYP
MAX
UNITS
±1.5
±10
±.5
±75
5
.01
±2.5
±.01
1011
6
±3
±.5
±1
±25
±5
±10
±.2
*
50
3
10
*
±50
±1.5
±10
*
*
*
*
*
mV
µV/°C
µV/V
µV/√kh
pA
pA/V
pA
pA/V
Ω
pF
V
dB
130
116
5
60
60
±VS–10
±VS–5
75
±VS–5
±VS–3
*
*
*
*
dB
MHz
kHz
°
*
*
*
*
*
*
*
*
10
*
SOA
*
*
V
V
mA
mA
V/µs
nF
µF
µs
±150
6
±150
*
8.5
V
mA
4.26
6.22
30
*
8.57
*
*
*
+85
*
*
100
30
12
±15
F > 60Hz
F < 60Hz
Meets full range specification
PA83
TYP
96
20
–25
300V
Internally Limited
17.5W
±300V
±300V
300°C
175°C
–65 to +150°C
–55 to +125°C
*
3
40
*
*
*
*
°C/W
°C/W
°C/W
°C
NOTES: * The specification of PA83A is identical to the specification for PA83 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 tests 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.
6. Signal slew rates at pins 5 and 6 must be limited to less than 1V/ns to avoid damage. When faster waveforms are unavoidable,
resistors in series with those pins, limiting current to 150mA will protect the amplifier from damage.
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.
PA83U
PA83 • PA83A
CURRENT LIMIT
250
15
12.5
10
7.5
5
150
100
50
2.5
0
25
50
75
100 125
TEMPERATURE, T (°C)
SMALL SIGNAL RESPONSE
PHASE, Ф (°)
40
20
0
–120
–150
–180
1
10
100 1K 10K 100K 1M 10M
FREQUENCY, F (Hz)
–210
PULSE RESPONSE
RL = 2KΩ
4
2
0
–2
–4
–6
–.5
VIN = ±5V, tr =100ns
0
.5
1
1.5 2.0
TIME, t (µs)
120
100
80
60
40
20
0
PA83U
10
100 1K
10K .1M
FREQUENCY, F (Hz)
1M
10
SLEW RATE VS. SUPPLY
RL = 2KΩ
1.2
1.0
.8
.6
POWER SUPPLY REJECTION
120
100
80
+VS
60
40
–VS
20
0
1
10
°C
6
100 1K 10K .1M
FREQUENCY, F (Hz)
1M
=
C
=
TC
4
–2
25
TC
5°
5
°C
=
85
TC
3
2
20
40
80
60
100 120
OUTPUT CURRENT IO (mA)
0
POWER RESPONSE
| +VS | + | –VS | = 300V
200
RL = 2KΩ
100
60
| +VS | + | –VS | = 100V
30
.1M
.2M .3M .5M .7M 1M
FREQUENCY, F (Hz)
INPUT NOISE
20
1.4
140
7
15
50K
100 1K 10K .1M 1M 10M
FREQUENCY, F (Hz)
.4
30 50
100
150
200
250 300
TOTAL SUPPLY VOLTAGE, VS (V)
2.5 3.0
COMMON MODE REJECTION
1
1
1.6
NORMALIZED SLEW RATE (X)
6
140
–90
POWER SUPPLY REJECTION, PSR (dB)
OPEN LOOP GAIN, AOL (dB)
–60
60
OUTPUT VOLTAGE SWING
8
300
RL = 2KΩ
–30
80
–20
–25 0
25 50 75 100 125
CASE TEMPERATURE, TC (°C)
PHASE RESPONSE
0
RL = 2KΩ
100
OUTPUT VOLTAGE, VO (VP)
0
–55
150
OUTPUT VOLTAGE, VO (VPP)
0
120
COMMON MODE REJECTION, CMR (dB)
200
INPUT NOISE VOLTAGE, VN (nV/√Hz)
CURRENT LIMIT, ILIM (A)
17.5
VOLTAGE DROP FROM SUPPLY, VS – VO (V)
POWER DERATING
20
COMMON MODE VOLTAGE, VCM (VPP)
INTERNAL POWER DISSIPATION, PD (W)
P r o d u c t I n n o v a t i o nF r o m
15
10
6
4
2
10
300
200
100
1K
10K
FREQUENCY, F (Hz)
.1M
COMMON MODE VOLTAGE
| +VS | + | –VS | = 300V
100
60
30
| +VS | + | –VS | = 100V
15
10K 20K
50K .1M .2M
.5M 1M
FREQUENCY, F (Hz)
3
PA83 • PA83A
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 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 Precision Power product models,
consult the "Evaluation Kit" section for details. For the most
current version of all Apex Precision Power product data sheets,
visit www.Cirrus.com.
SAFE OPERATING AREA (SOA)
The bipolar output stage of this high voltage amplifier has
two distinct limitations.
1. The internal current limit, which limits maximum available
output current.
2. The second breakdown effect, which occurs whenever the
simultaneous collector current and collector-emitter voltage
SOA
150
100
INTERNAL CURRENT LIMIT
t=
s
5m
BR
O
s
D
1m AK
E
D
N
70
t=
O
C
0.
SE
t=
5m
s
dy
N
ea
W
50
st
Two external diodes as shown in Figure 1, are required
to protect these amplifiers against flyback (kickback) pulses
exceeding the supply voltages of the amplifier when driving
inductive loads. For component selection, these external diodes
must be very quick, such as ultra fast recovery diodes with
no more than 200 nanoseconds of reverse recovery time. Be
sure the diode voltage rating is greater than the total of both
supplies. The diode will turn on to divert the flyback energy
into the supply rails thus protecting the output transistors from
destruction due to reverse bias.
A note of caution about the supply. The energy of the flyback
pulse must be absorbed by the power supply. As a result, a transient will be superimposed on the supply voltage, the magnitude
of the transient being a function of its transient impedance and
current sinking capability. If the supply voltage plus transient
exceeds the maximum supply rating or if the AC impedance
of the supply is unknown, it is best to clamp the output and the
supply with a zener diode to absorb the transient.
+VS
te
40
30
20
80
100
120
150
200
250
300
INTERNAL VOLTAGE DROP, SUPPLY TO OUTPUT (V)
exceed specified limits.
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:
4
INDUCTIVE LOADS
a
st
OUTPUT CURRENT FROM +VS OR -VS (mA)
200
1. The following capacitive and inductive loads are safe:
±VS
C(MAX)
L(MAX)
150V
.7 F
1.5H
125V
2.0µF
2.5H
100V
5.µF
6.0H
75V
60µF
30H
50V
ALL
ALL
2. Short circuits to ground are safe with dual supplies up to
120V or single supplies up to 120V.
3. Short circuits to the supply rails are safe with total supply
voltages up to 120V, e.g. ±60V.
4. The output stage is protected against transient flyback.
However, for protection against sustained, high energy
flyback, external fast-recovery diodes should be used.
–VS
FIGURE 1. PROTECTION, INDUCTIVE LOAD
PA83U
P r o d u c t I n n o v a t i o nF r o m
PA83 • PA83A
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
information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale
supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus
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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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PA83U
5