Electronic Components Datasheet Search
Selected language     English  ▼
Part Name
         Description


PA74 Datasheet(PDF) 4 Page - Cirrus Logic

Part No. PA74
Description  POWER DUAL OPERATIONAL AMPLIFIERS
Download  4 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  APEX [Cirrus Logic]
Homepage  http://www.cirrus.com
Logo 

   
 4 page
background image
APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
4
OPERATING
CONSIDERATIONS
PA74/76 • PA74A/PA76A
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.
PA74–76U REV C NOVEMBER 2004 © 2004 Apex Microtechnology Corp.
GENERAL
Please read Application Note 1 "General Operating Consider-
ations" which covers stability, supplies, heatsinking, mounting,
SOA interpretation, and specification interpretation. Visit www.
apexmicrotech.com for design tools that help automate tasks
such as calculations for stability, internal power dissipation,
heatsink selection; Apex's complete Application Notes library;
Technical Seminar Workbook; and Evaluation Kits.
STABILITY CONSIDERATIONS
All monolithic power op amps use output stage topologies
that present special stability problems. This is primarily due to
non-complementary (both devices are NPN) output stages with
a mismatch in gain and phase response for different polarities
of output current. It is difficult for the opamp manufacturer to
optimize compensation for all operating conditions.
SAFE OPERATING AREA (SOA)
The SOA curves combine the effect of all limits for this power
op amp. 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.
THERMAL CONSIDERATIONS
Thermal grease or an Apex TW03 thermal washer, RCS = .1
to .2°C/W, is the only recommended interface for the PA74/76.
Internal power dissipation increases directly with frequency
therefore it is critical to sufficiently heat sink the PA74 and
PA76. Even unloaded the PA74 and PA76 can dissipate up
to 3 watts while running at higher frequencies.
���
���������������������
�������������
������
���
���
��
���
���
��
����������������������������������������
��������
�����
�������
�����
�������
PARALLEL CONFIGURATION CONSIDERATIONS
LOSSES
The PA74 and PA76 utilize a parallel configuration to
achieve the desired current output requirements. The paral-
lel configuration inherently creates internal losses due to
circulating currents. The circulating currents generate power
losses through the current sharing resistors when delivering
current to the load.
SUPPLY CURRENT
The parallel configuration used in the PA74 and PA76 also
generates supply currents while high voltage sign waves
are seen at the output. Listed below are the supply currents
expected while running at a particular frequency and when VO
≈ 15Vpp, note that the outputs are not loaded.
Frequency
Supply Current
100Hz
18mA
1KHz
20mA
5KHz
32mA
10KHz
50mA
15KHz
75mA
SATURATION OPERATION
The parallel configuration used in the PA74 and PA76 is
sensitive to operation in the saturation region. The PA74 and
PA76 may exhibit large peak currents; this is mainly due to
thermal protection limitations.
��
��
��
��
��
��
��
��������������
��
��
��
���
���
���������������������
��������������������
�������������������
�����




Html Pages

1  2  3  4 


Datasheet Download



Related Electronics Part Number

Part NumberComponents DescriptionHtml ViewManufacturer
TS27M2CPRECISION LOW POWER CMOS DUAL OPERATIONAL AMPLIFIERS 1 2 3 4 5 MoreSTMicroelectronics
AX358Low Power Dual Operational Amplifiers 1 2 3 4 5 MoreList of Unclassifed Manufacturers
IL072Low Power J-FET DUAL OPERATIONAL AMPLIFIERS 1 2 3 4 5 MoreIntegral Corp.
IL082Low Power J-FET DUAL OPERATIONAL AMPLIFIERS 1 2 3 4 5 MoreIntegral Corp.
PA75DUAL POWER OPERATIONAL AMPLIFIERS 1 2 3 4 Cirrus Logic
TL062LOW POWER J-FET DUAL OPERATIONAL AMPLIFIERS 1 2 3 4 5 MoreSTMicroelectronics
L272DUAL POWER OPERATIONAL AMPLIFIERS 1 2 3 4 5 MoreSTMicroelectronics
L2720LOWDROP DUAL POWER OPERATIONAL AMPLIFIERS 1 2 3 4 5 MoreSTMicroelectronics
OP282Dual/Quad Low Power High Speed JFET Operational Amplifiers 1 2 3 4 5 MoreAnalog Devices
UPC358LOW POWER DUAL OPERATIONAL AMPLIFIERS 1 2 3 4 5 MoreNEC

Link URL

Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Bookmark   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com 2003 - 2017    


Mirror Sites
English : Alldatasheet.com  , Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp  |   Russian : Alldatasheetru.com
Korean : Alldatasheet.co.kr   |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com  |   Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl