P r o d t
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EK28
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PA97DR
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EK28
EK28
ASSEMBLY
1. See Figure 1. Insert and solder the TransZorb diodes at D3
and D4 (440V).
2. Insert and solder the disc bypass capacitors at C1 and C2.
3. Jumper R
LIM
and R
C
Note that heatsink HS28 is not used.
4. Add banana jacks as necessary to complete connections to
external circuits and power supplies.
5. Insert the amplifier into the PCB mounting holes located in
the space between the heatsink fins (not used) and solder
pins.
6. Add other passive components as necessary to complete
your circuit.
7. Most common configurations will ground the non-inverting pin
of the amplifier. J1 is a convenient way to do this if necessary
for your application circuit.
8. The four holes at the corners of the circuit board are for
mounting #6 standoff spacers if desired.
9. R1-R5 are multiple feedback resistors in series. Commonly
available resistors do not have a breakdown voltage sufficient
to stand off the output voltage of the amplifier. Using multiple
resistors will divide down the voltage that each resistor must
withstand.
Evaluation Kit for PA97
INTRODUCTION
This easy-to-use kit provides a platform for the evaluation
of linear power amplifiers circuits using the PA97 pin-out. With
ample breadboarding areas it is flexible enough to analyze
a multitude of standard or proprietary circuit configurations.
Critical connections for power supply bypassing are pre-wired.
Components not usually readily available in engineering labs
are provided. External connection to the evaluation kit can be
made via the terminals at the edge of the circuit board. These
terminal pads are suitable for standard banana jacks or direct
soldering of wires. The schematic is shown in Figure 1.
PARTS LIST
Part #
EVAL23
P6KE440A
CDC01
Description, Vendor
Quantity
PC Board, Apex Precision Power 1
TransZorb, General
2
Semiconductor (440V)
Capacitor .01µF 1kV,
2
Sprague 5GAS10
AUX1
AUX2
IN1
IN2
OUT
-VS
+VS
GND
D3*
440V
C4
R
5
R
4
R
3
R
2
R
1
D4*
440V
C1*
R
6
D1
D2
1
2
12
PA97
10
6
4
8
J1
C
C
C2*
FIGURE 1.
Figure 1 shows the schematic of the evaluation kit's pre-wired
connections. Components supplied with the kit are marked with
an asterisk (*). See the amplifier's data sheet for full applica-
tion information.
EK28U
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
MAY 2009
1
APEX − EK28UREVC
P r o d u c t I n n o v a t i o nF r o m
EK28
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
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All other brand and product names in this document may be trademarks or service marks of their respective owners.
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