PA08V Datasheet, PDF (1/2 Pages) Cirrus Logic – POWER OPERATIONAL AMPLIFIER

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Power Operational Amplifiers
PAP0A80V8V
FEATURES
• EXTENDED SUPPLY RANGE
UP TO ±175V or
350V TOTAL
• PROVIDES PA08 PERFORMANCE
UP TO ±150mA
PROGRAMMABLE CURRENT LIMIT
LOW DRIFT FET INPUT
APPLICATIONS
• PROGRAMMABLE POWER SUPPLIES UP TO 340V
• ELECTROSTATIC TRANSDUCERS & DEFLECTION
• PIEZO ELECTRIC TRANSDUCERS
• HIGH VOLTAGE INSTRUMENTATION
DESCRIPTION
The PA08V is an extended supply range operational amplifier
capable of output voltage swings of ±170V with dual supplies or
340V total supply voltage on single or non-symmetric supplies.
High accuracy is achieved with a cascode input circuit con-
figuration. All internal biasing is referenced to a zener diode
fed by a FET constant current source. As a result, the PA08
features an unprecedented supply range and excellent sup-
ply rejection. The output stage is biased class A-B for linear
operation. Internal phase compensation assures stability at all
gain settings. The safe operating area (SOA) can be observed
with all types of loads by choosing the appropriate current limit-
ing resistors. For operation into inductive loads, two external
flyback pulse protection diodes are recommended. A heatsink
may be necessary to maintain the proper case temperature
under normal operating conditions.
This hybrid integrated circuit utilizes a beryllia (BeO) sub-
strate, thick film resistors, ceramic capacitors, and semicon-
ductor 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 TO-3 package is hermetically sealed and electrically
isolated. The use of compressible thermal isolation washers
and/or improper mounting torque will void the product warranty.
Please see “General Operating Considerations”.
SPECIFICATIONS
Specifications of the standard PA08 apply with the benefit
of supply ratings being extended to ±175V. Design changes
enabling the total supply rating of 350V have no effect on the
shape of the typical performance graphs.
GENERAL CONSIDERATIONS
SAFE OPERATING AREA
The extended safe operating area is as follows:
When operating on ±175V, maximum safe values of capaci-
tive and inductive loading are .2µF and 200mH. Maximum safe
current limit for a short to common is 50mA, and for a short to
supply rails, the maximum is 15mA.
8-pin TO-3
PACKAGE STYLE CE
Please consult the PA08 data sheet for basic information
on this amplifier, plus the application notes in this Apex Preci-
sion Power DATA BOOK, for recommendations on stability,
current limiting, heatsinks, bypassing, and suggestions for
circuit functions.
SAFE OPERATING AREA CURVE (SOA)
150
100
80
50
40
30
steady
t
=
t
=
t
=
t _{= 200µs}
0.5ms
1ms
5ms
state
20
15
90 100
125 150 175 200
250 300 350
SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE (V)
EQUIVALENT SCHEMATIC
3
7
Q1
Q2
Q5
D1
Q3
Q4
C3
Q8
5
4 ^Q12A
Q9 C2
Q10
C4
Q11
Q12B
C1
Q7
Q19
Q6
2
1
8
Q17
Q15
Q16
D2
6
PA08_hV_ttU_{p://www.cirrus.com}
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
MAY 2009₁
APEX − PA08VUREVH