EK09 CE (TO-3), CR, CU,
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P r o d u c t
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DC, DD (MO-127) Packages
EK09
EK09
ASSEMBLY
Let us define the side of the top board with solder pads for
each pin (roughly triangular on the TO-3 sockets) as the com-
ponent side, where all the support components will determine
circuit function and will be inside the finished box. The other
side of this board is hereby dubbed the amplifier side.
Insert cage jacks from the amplifier side and solder. Consider
one of these techniques: 1) Place cage jacks in holes, cover
with one of the 6" copper sides, flip over and solder, or 2) place
cage jacks on pins of the amplifier, insert and solder. If done
carefully, technique 2 can be used for the MO-127 package
with 0.040" leads.
Starting with one short and one long side, locate a vertical
square corner in your work area (a large heatsink standing
on end works fine) and solder the two together. Repeat for
the other two sides, and finally solder the two pairs together.
With the component side up , place rectangle of sides on top
and tack two opposite corners. When satisfied with alignment,
solder the box together then add connectors and components
as desired.
Note that copper on the inside and on the top of the box will
all be tied to ground. Copper on the four outer sides of the box
will be floating unless you tie them down.
Soldering a stranded #10 to #16 ground wire from the im-
mediate area of the socket(s) to the ground connector of the
power supply(ies) is good construction practice. If the circuit
is not a bridge, run this same size wire from the socket area
to the output return connector. This will avoid high currents in
the ground plane which may destroy signal integrity or even
an amplifier. This is a good time to think about star grounding
where each ground connection has a dedicated path to the
center of the star such that currents in any path are not capable
of inducing voltage in any other path.
Note that the layout makes it easy to locate the star center
nearly coincident with the socket center.
Auxiliary circuits may be mounted inside the box in 3-D fash-
ion supported on ground connections or on daughter boards
as convenient. Other style connectors, switches or indicators
can easily be added by simply drilling the appropriate holes
and mounting them.
Evaluation Kit for TO-3 and MO-127 Packages
INTRODUCTION
This kit provides a solid mechanical platform with good shield-
ing and grounding to breadboard eight pin TO-3 packages or
the MO-127 package with 0.060" pins. This kit is not intended
as an alternate for kits dedicated to specific amplifiers. See
www.Cirrus.com for availability of dedicated kits.
Construction will involve surface mounting and 3D techniques.
Holes are provided to mount standard banana and BNC con-
nectors for I/O. See the Apex Precision Power Accessories
Information data sheet for a selection of flat-back heatsinks
and thermal washers for these packages.
Note that HS11 is compatible with EK09 and all three sockets
can be used if desired. If the EK09 is to be used as an MO-127
platform only, HS18 rated at 1° C/W is a cost effective alterna-
tive to HS11 if internal power dissipation permits. Lower cost
alternatives for two package TO-3 applications are HS02, HS01,
and HS09. For single package TO-3 applications the HS13 is
also suitable. The six chip capacitors provided can be used as
the critical first step in power supply bypass for dual supplies
for all three sockets. These capacitors are rated at 200V.
PARTS LIST
Part #
PB99-P2
PB99- P6
PB99-P7
MS02
MS04
OX7R105KWN
Description
Quantity
top
1
side
2
side
2
cage jacks for one TO-3 socket
2
cage jacks for one MO-127 socket
1
1µF Cap 1825B105K201N,Novacap
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BEFORE YOU GET STARTED
• Attempt to visualize the finished circuit mechanically and in
terms of where the high currents flow.
• Use proper ESD precautions.
• Verify heatsink is adequate
• Use thermal grease or Apex Precision Power thermal washer.
• Do not make or break any connection on a hot circuit.
• Start with lowest rated voltages.
• Checking for oscillations with an oscilloscope is a must.
EK09U
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
MAY 2009
1
APEX − EK09UREVE
EK09
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-
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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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EK09U
Embedded System
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