EK71
Evaluation Kit
APPLICABLE PARTS (SOLD SEPARATELY)
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PA107
INTRODUCTION
The EK71 Evaluation kit is designed to provide a convenient way to breadboard and evaluate design ideas
for the PA107 power operational amplifier. The evaluation board is pre-wired for all required external com-
ponents. The evaluation board has been laid out and labeled to easily configure the high voltage operational
amplifier in an inverting configuration. However, the evaluation board is flexible enough to analyze a multi-
tude of standard or proprietary circuit configurations. Components not usually readily available in engineer-
ing labs are provided. External connection to the evaluation kit can be made via the terminal connectors at
the edge of the circuit board. These connectors are suitable for standard banana plugs. The schematic is
shown in Figure 1.
Figure 1: EK71 Schematic
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© Apex Microtechnology Inc.
All rights reserved
Dec 2015
EK71U Rev D
EK71
PARTS LIST
Reference
Manufacturer Part #
146510CJ
571-0100
C
4
, C
6
KMH200VN68IM25X40T2
EVAL71
HS20
310-43-120-41-001000
C
2
, C
7
, C
5
, C
3
OX7R105KWN
TW07
Description
Connector, BNC, PCB Mount
4mm Black PCB Socket Single
Capacitor, 680 µF
PC Board
Heatsink
Mating Socket
Cap, 1µF
Thermal Washer, PSIP
QTY
1
9
2
1
1
1
4
1
BEFORE YOU GET STARTED
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Please read this data sheet in its entirety before starting to construct your evaluation board.
All Apex Microtechnology amplifiers should be handled using proper ESD precautions.
Do not change connections while the circuit is powered.
Initially set all power supplies to the minimum operating voltage allowed in the device data sheet.
Always use adequate power supply bypass capacitors, Apex Microtechnology recommends 1µF (ceramic)
in parallel with at least 10µF per ampere of output current (electrolytic/tantalum).
Always provide the adequate heat sinking. Power dissipation must be considered to ensure maximum
junction temperature is not exceeded.
Check for oscillations.
Please refer to Application Note, AN01 for general operating considerations.
ASSEMBLY
1. See Figure 1 and Figure 2. Solder the surface mount ceramic capacitors to the DUT side of the circuit
board at C2, C7, C5 and C3.
2. C1 and C8 are user supplied pin-through-hole bypass capacitors for Vcc and Vee respectively. Insert C1
and C8 from the component side and solder from the circuit side.
3. Solder the electrolytic capacitors to the circuit board at C4 and C6. Match the polarity markings on the cir-
cuit board with those on the capacitor body.
4. Clip off the mating socket strip after the 12th position. Insert the strip into the circuit board from the DUT
side and solder one pin on the reverse side. Check that the mating socket strip is fully seated against the
circuit board then solder the remaining pins. Insert the amplifier fully into the mating socket strip, noting
the pin 1 locations on the amplifier and the circuit board.
5. Examine the large heat sink. Notice that there are several holes in the face of the heat sink. These are for
mounting various Apex Microtechnology amplifier models. The circuit board aligns the amplifier with the
correct mounting hole once the heat sink is attached to the circuit board.
6. The four holes at the corners of the circuit board are for mounting #6 standoff spacers if desired. The
remaining two slotted holes are for mounting the large heat sink to the DUT side of the circuit board.
Temporarily mount the heat sink with 2 #6 x 1/2” self tapping screws from the opposite side of the circuit
board. Do not fully tighten the screws at this time. Check for alignment of the slot in the mounting tab of
the amplifier with a hole in the heat sink. Dismount and rotate the heat sink if necessary to achieve an
alignment with a hole in the heat sink. Position the heat sink so that the back of the amplifier mounting
tab is flush with the heat sink then tighten the heat sink mounting screws.
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EK71U Rev D
EK71
7. Hang the thermal washer near the end of a 6-32 x 1/2” screw. Slightly pull the amplifier away from the
heat sink face. Use the screw to position the thermal washer behind the amplifier and insert the screw
into the mounting hole of the heat sink. Secure the screw from the opposite side of the heat sink using a
nut holder.
8. To select the values of feedback resistor (RFB), feedback capacitor (CFB) and summing junction capacitor
(CSJ), please refer to the section titled “FEEDBACK CONSIDERATIONS” in the PA107DP data sheet.
9. Add other components as necessary to complete your application circuit.
Figure 2: EK71 Assembly
EK71U Rev D
3
EK71
Figure 3: EVAL71 PCB Layout
5.900”
3.625”
TOP SIDE
BOTTOM SIDE
4
EK71U Rev D
EK71
NEED TECHNICAL HELP? CONTACT APEX SUPPORT!
For all Apex Microtechnology product questions and inquiries, call toll free 800-546-2739 in North America. For
inquiries via email, please contact apex.support@apexanalog.com. International customers can also request
support by contacting their local Apex Microtechnology Sales Representative. To find the one nearest to you,
go to www.apexanalog.com
IMPORTANT NOTICE
Apex Microtechnology, Inc. has made every effort to insure the accuracy of the content contained in this document. However, the information is
subject to change without notice and is provided "AS IS" without warranty of any kind (expressed or implied). Apex Microtechnology reserves the right
to make changes without further notice to any specifications or products mentioned herein to improve reliability. This document is the property of
Apex Microtechnology and by furnishing this information, Apex Microtechnology grants no license, expressed or implied under any patents, mask
work rights, copyrights, trademarks, trade secrets or other intellectual property rights. Apex Microtechnology owns the copyrights associated with the
information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Apex
Microtechnology integrated circuits or other products of Apex Microtechnology. 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.
APEX MICROTECHNOLOGY PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN PRODUCTS USED FOR LIFE
SUPPORT, AUTOMOTIVE SAFETY, SECURITY DEVICES, OR OTHER CRITICAL APPLICATIONS. PRODUCTS IN SUCH APPLICATIONS ARE UNDERSTOOD TO BE
FULLY AT THE CUSTOMER OR THE CUSTOMER’S RISK.
Apex Microtechnology, Apex and Apex Precision Power are trademarks of Apex Microtechnology, Inc. All other corporate names noted herein may be
trademarks of their respective holders.
EK71U Rev D
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Power technology
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