Note the following details of the code protection feature on Microchip devices:
•Microchip products meet the specification contained in their particular Microchip Data Sheet.
•Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•Microchip is willing to work with the customer who is concerned about the integrity of their code.
•Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights unless otherwise stated.
Trademarks
The Microchip name and logo, the Microchip logo, Adaptec,
AnyRate, AVR, AVR logo, AVR Freaks, BesTime, BitCloud, chipKIT,
chipKIT logo, CryptoMemory, CryptoRF, dsPIC, FlashFlex,
flexPWR, HELDO, IGLOO, JukeBlox, KeeLoq, Kleer, LANCheck,
LinkMD, maXStylus, maXTouch, MediaLB, megaAVR, Microsemi,
Microsemi logo, MOST, MOST logo, MPLAB, OptoLyzer,
PackeTime, PIC, picoPower, PICSTART, PIC32 logo, PolarFire,
Prochip Designer, QTouch, SAM-BA, SenGenuity, SpyNIC, SST,
SST Logo, SuperFlash, Symmetricom, SyncServer, Tachyon,
TempTrackr, TimeSource, tinyAVR, UNI/O, Vectron, and XMEGA
are registered trademarks of Microchip Technology Incorporated in
the U.S.A. and other countries.
APT, ClockWorks, The Embedded Control Solutions Company,
EtherSynch, FlashTec, Hyper Speed Control, HyperLight Load,
IntelliMOS, Libero, motorBench, mTouch, Powermite 3, Precision
Edge, ProASIC, ProASIC Plus, ProASIC Plus logo, Quiet-Wire,
SmartFusion, SyncWorld, Temux, TimeCesium, TimeHub,
TimePictra, TimeProvider, Vite, WinPath, and ZL are registered
trademarks of Microchip Technology Incorporated in the U.S.A.
Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any
Capacitor, AnyIn, AnyOut, BlueSky, BodyCom, CodeGuard,
CryptoAuthentication, CryptoAutomotive, CryptoCompanion,
CryptoController, dsPICDEM, dsPICDEM.net, Dynamic Average
Matching, DAM, ECAN, EtherGREEN, In-Circuit Serial
Programming, ICSP, INICnet, Inter-Chip Connectivity, JitterBlocker,
KleerNet, KleerNet logo, memBrain, Mindi, MiWi, MPASM, MPF,
MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach,
Omniscient Code Generation, PICDEM, PICDEM.net, PICkit,
PICtail, PowerSmart, PureSilicon, QMatrix, REAL ICE, Ripple
Blocker, SAM-ICE, Serial Quad I/O, SMART-I.S., SQI,
SuperSwitcher, SuperSwitcher II, Total Endurance, TSHARC,
USBCheck, VariSense, ViewSpan, WiperLock, Wireless DNA, and
ZENA are trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated in
the U.S.A.
The Adaptec logo, Frequency on Demand, Silicon Storage
Technology, and Symmcom are registered trademarks of Microchip
Technology Inc. in other countries.
GestIC is a registered trademark of Microchip Technology Germany
II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in
other countries.
All other trademarks mentioned herein are property of their
respective companies.
HV2722 Analog Switch Evaluation Board User’s Guide
NOTES:
DS50002810A-page 4 2019 Microchip Technology Inc.
HV2722 ANALOG SWITCH
EVALUATION BOARD
USER’S GUIDE
Preface
NOTICE TO CUSTOMERS
All documentation becomes dated, and this manual is no exception. Microchip tools and
documentation are constantly evolving to meet customer needs, so some actual dialogs
and/or tool descriptions may differ from those in this document. Please refer to our website
(www.microchip.com) to obtain the latest documentation available.
Documents are identified with a “DS” number. This number is located on the bottom of each
page, in front of the page number. The numbering convention for the DS number is
“DSXXXXXXXXA”, where “XXXXXXXX” is the document number and “A” is the revision level
of the document.
For the most up-to-date information on development tools, see the MPLAB
Select the Help menu, and then Topics, to open a list of available online help files.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
HV2722 Analog Switch Evaluation Board. Items discussed in this chapter include:
• Document Layout
• Conventions Used in this Guide
• Recommended Reading
• The Microchip Website
• Customer Support
• Document Revision History
®
IDE online help.
DOCUMENT LAYOUT
This document describes how to use the HV2722 Analog Switch Evaluation Board as
a development tool to emulate and debug firmware on a target board. The manual
layout is as follows:
• Chapter 1. “Product Overview” – Important information about the HV2722
Analog Switch Evaluation Board.
• Chapter 2. “Installation and Operation” – This chapter includes a detailed
description of each function of the demonstration board and instructions for how to
begin using the HV2722 Analog Switch Evaluation Board.
• Chapter 3. “GUI Description” – This chapter describes the features of the GUI
PC software.
• Chapter 4. “PCB Design and Layout Notes” – This chapter explains important
points of the PCB design and layout of HV2722 Analog Switch Evaluation Board.
• Appendix A. “Schematics and Layouts” – Shows the schematic and PCB
layout diagrams for the HV2722 Analog Switch Evaluation Board.
• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the
HV2722 Analog Switch Evaluation Board.
• Appendix C. “Demo Board Waveforms” – Describes the various demo
waveforms for the HV2722 Analog Switch Evaluation Board.
where N is the total number of
digits, R is the radix and n is a
digit.
Filenamesautoexec.bat
File pathsc:\mcc18\h
Keywords_asm, _endasm, static
Command-line options-Opa+, -Opa-
Bit values0, 1
Constants0xFF, ‘A’
Choice of mutually exclusive
arguments; an OR selection
Represents code supplied by
user
“Save project before build”
4‘b0010, 2‘hF1
any valid filename
[options]
errorlevel {0|1}
var_name...]
void main (void)
{ ...
}
DS50002810A-page 6 2019 Microchip Technology Inc.
RECOMMENDED READING
This user’s guide describes how to use the HV2722 Analog Switch Evaluation Board.
Another useful document is listed below. The following Microchip document is available
and recommended as a supplemental reference resource:
HV2621/HV2721/HV2722 Data Sheet – “300V, Low-Charge Injection, 16-Channel,
High-Voltage Analog Switch” (DS20006082A)
THE MICROCHIP WEBSITE
Microchip provides online support via our website at www.microchip.com. This website
is used as a means to make files and information easily available to customers.
Accessible by using your favorite Internet browser, the website contains the following
information:
• Product Support – Data sheets and errata, application notes and sample
programs, design resources, user’s guides and hardware support documents,
latest software releases and archived software
• General Technical Support – Frequently Asked Questions (FAQs), technical
support requests, online discussion groups, Microchip consultant program
member listing
• Business of Microchip – Product selector and ordering guides, latest Microchip
press releases, listing of seminars and events, listings of Microchip sales offices,
distributors and factory representatives
Preface
PRODUCT CHANGE NOTIFICATION SERVICE
Microchip’s customer notification service helps keep customers current on Microchip
products. Subscribers will receive email notifications whenever there are changes,
updates, revisions or errata related to a specified product family or development tool of
interest.
To register, access the Microchip website at www.microchip.com, click on Product
Change Notification and follow the registration instructions.
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels:
• Distributor or Representative
• Local Sales Office
• Field Application Engineer (FAE)
• Technical Support
Customers should contact their distributor, representative or field application engineer
(FAE) for support. Local sales offices are also available to help customers. A listing of
sales offices and locations is included in the back of this document.
Technical support is available through the website at:
HV2722 Analog Switch Evaluation Board User’s Guide
NOTES:
DS50002810A-page 8 2019 Microchip Technology Inc.
Chapter 1. Product Overview
1.1INTRODUCTION
The HV2722 Analog Switch Evaluation Board (ADM00946) works with the HV MUX
Controller Board (ADM00825) to provide No High-Voltage Bias, 32-Channel,
High-Voltage Analog Switches with L-Switch Architecture demonstration, including
basic on/off switch operation, and 2:1 MUX operation with two built-in MD1822,
TP2640 and TN2640 pulser circuits.
1.2HV2722 DEVICE SHORT OVERVIEW
The HV2722 device is a 300V, low-charge injection, 16-channel high-voltage analog
switch. It is designed to be used in applications requiring high-voltage switching,
controlled by low-voltage command signals, such as medical ultrasound imaging,
driving piezoelectric transducers and in printers. Using the 300V high-voltage CMOS
technology, the typical 18 on-resistance analog switch can pass the analog pulse
signal up to ±3A and ±135V, under high-voltage supplies of ±150V. It requires 3.3V or
5V for the logic operation.
HV2722 ANALOG SWITCH
EVALUATION BOARD
USER’S GUIDE
1.3HV2722 ANALOG SWITCH EVALUATION BOARD FEATURES
• HV2722 No High-Voltage Bias, 32-Channel, High-Voltage Analog Switches with
L-Switch Architecture
• Designed to work with Microchip HV MUX Controller Board
• Two 2:1 MUX with Built-In MD1822, TP2640 and TN2640 Pulsers
HV2722 Analog Switch Evaluation Board User’s Guide
1.4WHAT IS THE HV2722 ANALOG SWITCH EVALUATION BOARD?
The HV2722 Analog Switch Evaluation Board can control the HV2722 device’s
operation and built-in pulsers that are connected to the two 2:1 MUX switches for
demonstration. Four switch outputs, on the one side of two 2:1 MUX, have SMA
connectors to which the user can connect four transducer elements. The other side of
the 2:1 MUX is connected to two built-in MD1822, TP2640 and TN2640 pulsers. The
HV2722 Analog Switch Evaluation Board can drive four transducer elements with
5 MHz, ±135V pulse signals.
The HV2722 Analog Switch Evaluation Board features one HV2722K6-G 9x9x1 mm
64-Lead QFN packaged integrated circuit, two MD1822K6-G 3x3x1 mm 16-Lead QFN
packaged integrated circuits, four TP2640LG-G 4.9x3.9x1.75 mm 8-Lead SOIC
packaged PMOS and four TN2640LG-G 4.9x3.9x1.75 mm 8-Lead SOIC
packaged NMOS.
The HV2722 Analog Switch Evaluation Board uses two high-speed 20-signal pair
carrying capable right-angle backplane connectors, which are designed to work with
the Microchip HV MUX Controller Board (ADM00825) as a control signal source.
The HV MUX Controller Board has an FPGA that generates pulser waveform and
logic control signals, and a USB bridge IC that connects the control board to a PC. By
using a Microsoft
the HV2722 device and two built-in pulsers.
Four switch terminals, consisting of two 2:1 MUX configurations on the PCB, have
SMA connectors to which the user can connect loads. The jumpers close to the SMA
connectors are for optionally connecting the on-board dummy R-C load
(330 pF//2.5 kΩ) to the pulser output.
®
Windows
®
operated PC and the GUI software, the user can control
WARNING
Risk warning of electrical shock. This board uses multiple hazardous high
voltages. Disconnect all high-voltage supplies before working on it. Electrical
safety precautions must be taken when working on or using this board.
1.5HV2722 ANALOG SWITCH EVALUATION BOARD TECHNICAL
PARAMETERS
TABLE 1-1:HV2722 ANALOG SWITCH EVALUATION BOARD TECHNICAL
PARAMETERS
ParameterValue
Pulser Frequency5 MHz
Number of Pulses in the Train1 to 90
T
Time between Pulse Trains5 to 30 msec
OFF
Pulse Peak Voltage and Current0 to ±135V and ±3A (typical)
Interface of FPGA Control Signals
and USB PC-GUI Software
Pulser R-C Test-Load and User’s
Transducer Interface
PCB Board Dimension115 mm x 110 mm
J1 and J2 connect to the ADM00825 HV MUX
Controller Board
Built-in, 330 pF//2.5 k per channel with jumper and
50 SMA
DS50002810A-page 10 2019 Microchip Technology Inc.
Product Overview
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FIGURE 1-1:HV2722 ANALOG SWITCH EVALUATION BOARD SIMPLIFIED BLOCK DIAGRAM
1.6HV2722 ANALOG SWITCH EVALUATION BOARD KIT CONTENTS
The HV2722 Analog Switch Evaluation Board includes:
• HV2722 Analog Switch Evaluation Board (ADM00946)
HV2722 Analog Switch Evaluation Board User’s Guide
NOTES:
DS50002810A-page 12 2019 Microchip Technology Inc.
Chapter 2. Installation and Operation
2.1GETTING STARTED
The HV2722 Analog Switch Evaluation Board is fully assembled and tested. The board
requires six power supply voltage rails of +5V, +10V, ±135V and ±150V. The +5V is
supplied from the HV MUX Controller Board and the others need to be supplied from
external power supplies.
2.1.1Additional Tools Required for Operation
1. An oscilloscope with minimum 500 MHz bandwidth and two high-impedance
probes. Make sure the grounds of the power supply sources are correctly
connected to the same ground as the testing oscilloscope ground.
2. A Microchip HV MUX Controller Board (ADM00825).
3. A Microsoft
installed and running:
- Connect J1 and J2 to the HV MUX Controller Board
- Connect the HV MUX Controller Board through the USB port to the
Windows 7 PC
®
Windows
HV2722 ANALOG SWITCH
EVALUATION BOARD
USER’S GUIDE
®
7 PC with the HV MUX Controller Board GUI software
2.2HV MUX GUI INSTALLATION
The HV MUX GUI software installer can be downloaded from the Microchip website at
www.microchip.com. Search for the evaluation board on the website by the part
number: ADM00946.
1. Open the HVMUXGUI-v1.0.0-windows-installer.exe.
2. Initiate the HV MUX GUI software installer by launching the Application Install
dialog box.
HV2722 Analog Switch Evaluation Board User’s Guide
Off/On Switch
12V/1A
Power
Connector
DC_IN (LD2)
PWR_OK (LD4)
USB_Fault (LD5)
Mini USB
Connector
FPGA_OK (LD1)PROM JTAG
J2
J1
2.5HV MUX CONTROLLER BOARD SETUP PROCEDURE
The HV MUX Controller Board generates control signals for the HV2722 Analog Switch
Evaluation Board and features a Spartan-6 XC6SLX9 FPGA.
1. Before powering up the HV2722 Analog Switch Evaluation Board and the HV MUX
Controller Board, make sure that the latest GUI software is installed on the PC.
2. Start the GUI program. If the board is not connected, a “Not Connected” message
is displayed in the Status bar, located at the bottom left of the screen.
3. Connect the appropriate power supply and turn on the power switch to power up
the HV MUX Controller Board. The FPGA_OK (LD1) and DC_IN (LD2)on the HV
MUX Controller Board should light up green. A “Connected” message is
displayed on the bottom left of the Status bar of the GUI.
The HV MUX Controller Board is now ready to control the HV2722 Analog Switch
Evaluation Board.
FIGURE 2-8:HV MUX CONTROLLER BOARD (ADM00825) – FRONT VIEW
DS50002810A-page 20 2019 Microchip Technology Inc.
Installation and Operation
2.6TESTING THE HV2722 ANALOG SWITCH EVALUATION BOARD
The user can turn on/off each of the 16 switches through the USB connected PC GUI
software program:
1. Click the Initialize HV MUXController button located at the top left corner.
2. Clear STBY
3. Select MODE.
4. Put 16-bit data (from bit 15 to bit 0) in DIN to set switches on and off. Bit 31 to
Bit 16 data are not used for the HV2722 Evaluation Board. Data ‘1’ means the
switch is on and data ‘0’ means the switch is off.
5. Click the Set HV MUX button.
6. Then, the GUI and controller board generate 32-bit data and 32 clocks, followed
by one LE
GUI.
7. If the user selects CLR and then clicks the Set HV MUX button, all the switches
are off.
Note:The typical voltage and waveforms are provided in Appendix C. “Demo
.
negative pulse, and switches are on and off according to DIN in the
Board Waveforms”.
2.7GENERATION OF PULSER OUTPUT AT SW2A OF HV2722
This section provides the simple step-by-step procedure to make the Ch1 pulser output
at the SW2A SMA connector by configuring the GUI.
1. Before powering up the HV2722 Analog Switch Evaluation Board, make sure
that the latest GUI software is installed on the PC.
2. Start the GUI program. If the board is not connected, a “Not Connected” message
is displayed in the Status bar, located at the bottom left of the screen.
3. Power up the HV MUX Controller Board and HV2722 Analog Switch Evaluation
Board as described in the previous section. The prompt, “Connected”, is
displayed in the Status bar.
4. Click the Initialize HV MUX Controller button and check the Message window
to see “Initialization Complete”.
5. Clear S
6. Select MODE.
7. Change the DIN to Bit 2 from ‘0’ to ‘1’ to set SW2 on
(DIN = 00000000 00000000 00000000 00000100).
8. Click the Set HV MUX button to turn on the HV2722 SW2.
9. Change the Pulses to 10.
10. Select CH1.
11. Click the Start button so that the CH1 pulser starts to generate pulse trains with
10 pulses and a 30 ms T
The Ch1 and Ch2 of the oscilloscope in Figure 2-9 show the SW2A and the SW3A.
HV2722 Analog Switch Evaluation Board User’s Guide
CH1
50V/div
CH2
50V/div
FIGURE 2-9:TYPICAL WAVEFORM OF 2:1 MUX CONNECTED TO PULSER
DS50002810A-page 22 2019 Microchip Technology Inc.
HV2722 ANALOG SWITCH
1
23
45
6
7
8
9
10
11
12
13
14
16
15
EVALUATION BOARD
USER’S GUIDE
Chapter 3. GUI Description
3.1HV2722 ANALOG SWITCH EVALUATION BOARD GUI DESCRIPTION
Figure 3-1 displays a screen capture of the HV MUX Controller Board GUI. Ta b le 3- 1
provides a detailed description of every item numbered in the screen capture. The
selection of the check box, binary data in the DIN entry box, and the number in Pulses
and TOFF entry box are just settings; they don’t change the operation of HV2722 and
the built-in pulsers immediately. By clicking the Set HV MUX, Start and Stop buttons,
the control data set by the user in the GUI changes the operation of HV2722 and turns
on/off the built-in pulsers in the HV2722 Analog Switch Evaluation Board. Follow the
explanation for each corresponding item.
HV2722 Analog Switch Evaluation Board User’s Guide
TABLE 3-1:HV2722 ANALOG SWITCH EVALUATION BOARD GUI DESCRIPTION
Item
Number
Item NameItem Description
1Initialize HV MUX
Controller
2STBY
3MODEStays selected. Not used for the HV2722 Evaluation Board.
4DIN32-bit data entry boxes. Bit 15 to bit 0 control the On/Off state of Switch 15 to
5CLRWhen this check box is selected, the CLR logic input is set to high and all the switches
6ENDeactivated when MODE is selected, not used for the HV2722 Evaluation Board.
7A/B
8Set HV MUXThis button controls whether the data described in Items 2 to 7 are applied to
9PulsesThis text box defines the number of pulses in the pulse train generated by the
10TOFFThis text box defines the interval between pulse trains generated by the selected
11CH1/CH2When one of these check boxes is selected, the respective pulser is set to generate
12StartThis button controls if the selected pulser starts generating the pulse train.
13StopThis button controls if the selected pulser stops generating the pulse train.
14Message windowThis window displays information from the GUI program.
15ClearThis button clears the messages in the Message window.
16Connection Status This window displays status of the connection between the GUI and the HV MUX
Deactivated when MODE is selected, not used for the HV2722 Evaluation Board.
This button controls whether the GUI starts the initialization of FPGA on the HV MUX
Controller Board, and the communication between the GUI and the HV MUX
Controller Board. If there is no error, the “Initialization Complete” message is
displayed in the Message window.
Stays unselected. Not used for the HV2722 Evaluation Board.
Switch 0, respectively. Bit 32 to bit 16 are not used for the HV2722 Evaluation Board.
If data entry is ‘1’, the associated switch is set to on. If data entry is ‘0’, the associated
switch is set to off.
of HV2722 are set to off. When cleared, the CLR logic input is set to low and the
16 switches of HV2722 are set to On/Off states according to the DIN data entry.
HV2722. Note that the 32-bit DIN data, 32 clocks and one negative LE
applied one time only.
selected pulser. A pulse is half of the cycle and the pulse train always starts the
positive pulse first.
pulser.
5 MHz pulse trains defined at Steps 9 and 10 by the user.
Controller Board.
pulse are
DS50002810A-page 24 2019 Microchip Technology Inc.
HV2722 ANALOG SWITCH
Chapter 4. PCB Design and Layout Notes
4.1PCB LAYOUT TECHNIQUES FOR HV2722
The HV2722 Analog Switch Evaluation Board is equipped with the HV2722, which has
16 analog switches to pass high-voltage, high-current and high-frequency pulses. The PCB
design and layout are important to ensure the success of the implementation.
4.1.1High-Voltage and High-Speed Grounding and Layout
Techniques
The center pad at the bottom of the HV2722 QFN package is internally connected to
V
, and should be connected to VNN externally on the PCB.
NN
The user must pay attention to the connecting traces, since the analog switches pass
the high-voltage and high-speed signals. In particular, controlled impedance of 50to
the ground plane and more trace spacing needs to be applied in this situation.
High-speed PCB trace design practices are used for the HV2722 Analog Switch Evaluation Board PCB layout. The internal circuitry of the HV2722 can operate at quite a
high frequency, with the primary speed limitation being the load capacitance. Because
of this high speed and the high transient currents that result from driving capacitive
loads, the supply voltage bypass capacitors should be as close to the pins as possible.
All the GND pins should have low-inductance feedthrough via connections that are
connected directly to a solid ground plane at the second layer of the PCB.
It is recommended to minimize the trace length to the ground plane and to insert a
ferrite bead in the power supply lead to the capacitor to prevent resonance in the power
supply lines.
It is important to minimize trace lengths and use sufficient trace width to reduce
inductance. Surface mount components are highly recommended.
The use of a solid ground plane, and good power and signal layout practices, will
prevent any possible parasitic capacitance coupling. The user should also ensure that
the circulating ground return current from a capacitive load cannot react with common
inductance to create noise voltages in the input logic circuitry.
EVALUATION BOARD
USER’S GUIDE
4.1.2Decoupling Capacitors Selection
The VDD, VPP and VNN supply voltage rails are able to provide fast transient current.
Therefore, they should have a low-impedance bypass capacitor close to each of the
power supply pins. Use a surface mount ceramic capacitor of 1.0 to 2.2 μF capacitance
with an appropriate voltage rating.
It is important to verify what type of ceramic capacitor is selected for these bypass
capacitors. The low-impedance means low-ESR/ESL impedance within the frequency
bandwidth range of ultrasound pulses transmitted, including the very fast dV/dt of the
pulse’s rising and falling edges. A capacitor with low-temperature coefficient and
low-voltage coefficient is also recommended. The type of X7R and X5R, or other more
advanced multilayer ceramic types, should be selected for these purposes.
HV2722 Analog Switch Evaluation Board User’s Guide
NOTES:
DS50002810A-page 26 2019 Microchip Technology Inc.
Appendix A. Schematics and Layouts
A.1INTRODUCTION
This appendix contains the following schematics and layouts for the HV2722 Analog
Switch Evaluation Board (ADM00946) and the HV MUX Controller Board (ADM00825).
• HV2722 Analog Switch Evaluation Board (ADM00946):