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PA08V
PA08V
PA08V
Power Operational Amplifiers
FEATURES
• EXTENDED SUPPLY RANGE
UP TO ±175V or
350V TOTAL
• PROVIDES PA08 PERFORMANCE
UP TO ±150mA
PROGRAMMABLE CURRENT LIMIT
LOW DRIFT FET INPUT
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.
OUTPUT CURRENT FROM +V
S
OR –V
S
(mA)
APPLICATIONS
• PROGRAMMABLE POWER SUPPLIES UP TO 340V
• ELECTROSTATIC TRANSDUCERS & DEFLECTION
• PIEZO ELECTRIC TRANSDUCERS
• HIGH VOLTAGE INSTRUMENTATION
SAFE OPERATING AREA CURVE (SOA)
t=
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”
.
150
100
80
t=
t=
20
0µ
0.5
s
50
40
30
20
15
90 100
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ad
ys
5m
s
e
1m
s
ms
tat
125
150
175 200
250
300 350
SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE (V)
EQUIVALENT SCHEMATIC
3
7
Q1
Q5
Q8
Q9
C4
5
4
Q12A
Q15
D2
6
Q12B
Q16
C2
Q10
Q11
Q2
Q4
C3
Q7
1
Q19
8
Q17
D1
Q3
Q6
2
C1
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.
PA08VU
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
MAY 2009
1
APEX − PA08VUREVH
PA08V
P r o d u c t I n n o v a t i o nF r o m
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 apex.support@cirrus.com.
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
for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third
parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights,
copyrights, trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives con-
sent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. This consent
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 PROP-
ERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE
SUITABLE FOR USE IN PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, AUTOMOTIVE SAFETY OR SECURITY DEVICES, LIFE SUPPORT PROD-
UCTS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUS-
TOMER’S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE
CUSTOMER OR CUSTOMER’S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES,
BY SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL
LIABILITY, INCLUDING ATTORNEYS’ FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES.
Cirrus Logic, Cirrus, and the Cirrus Logic logo designs, Apex Precision Power, Apex and the Apex Precision Power logo designs are trademarks of Cirrus Logic, Inc.
All other brand and product names in this document may be trademarks or service marks of their respective owners.
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PA08VU
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