Texas Instruments DAC53701EVM User manual

User’s Guide
DAC53701EVM
ABSTRACT
This user’s guide describes the characteristics, operation, and use of the DAC53701EVM evaluation module
(EVM). This EVM is designed to evaluate the performance of the DAC53701 and DAC43701 commercial,
buffered voltage output DACs in a variety of configurations. This EVM is also designed to evaluate the
automotive version devices, DAC53701-Q1 and DAC43701-Q1. Throughout this document, the terms evaluation
board, evaluation module, and EVM are synonymous with the DAC53701EVM. This document includes a
schematic, reference printed-circuit board (PCB) layouts, and a complete bill of materials.
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Table of Contents
1 Overview..................................................................................................................................................................................4
1.1 Kit Contents........................................................................................................................................................................4
1.2 Related Documentation from Texas Instruments............................................................................................................... 4
2 System Setup.......................................................................................................................................................................... 5
2.1 Software Setup...................................................................................................................................................................5
2.2 Hardware Setup................................................................................................................................................................. 7
3 Detailed Description............................................................................................................................................................... 9
3.1 Hardware Description.........................................................................................................................................................9
3.2 Software Description........................................................................................................................................................ 14
4 Schematic, PCB Layout, and Bill of Materials................................................................................................................... 22
4.1 BOOSTXL-DAC-PORT Schematic...................................................................................................................................23
4.2 DAC53701EVM Schematic.............................................................................................................................................. 25
4.3 PCB Components Layout.................................................................................................................................................26
4.4 BOOSTXL-DAC-PORT Bill of Materials...........................................................................................................................29
4.5 DAC53701EVM Bill of Materials...................................................................................................................................... 31
List of Figures
Figure 2-1. DAC53701EVM Software Setup............................................................................................................................... 5
Figure 2-2. Software Installation Path..........................................................................................................................................5
Figure 2-3. MSP-EXP432E401Y Launchpad (TI Launchpad ) Setup..........................................................................................6
Figure 2-4. TI Cloud Agent Installation........................................................................................................................................ 6
Figure 2-5. Hardware Setup........................................................................................................................................................ 7
Figure 2-6. Hardware Setup Guidelines...................................................................................................................................... 8
Figure 3-1. BOOSTXL-DAC-PORT Hardware Block Diagram.....................................................................................................9
Figure 3-2. DAC53701EVM Hardware Block Diagram.............................................................................................................. 12
Figure 3-3. DAC53701EVM GUI Location................................................................................................................................. 14
Figure 3-4. DAC53701EVM GUI Connection Detection............................................................................................................ 14
Figure 3-5. Software Home Page.............................................................................................................................................. 15
Figure 3-6. Setup Page..............................................................................................................................................................16
Figure 3-7. DAC Quick-Start Page: Basic DAC Tab.................................................................................................................. 17
Figure 3-8. DAC Quick-Start Page: Margining Tab....................................................................................................................18
Figure 3-9. DAC Quick Start Page: Function Generation.......................................................................................................... 19
Figure 3-10. DAC Quick-Start Page: Alarms Tab...................................................................................................................... 20
Figure 3-11. Register Map Page................................................................................................................................................21
Figure 3-12. Register Page Options.......................................................................................................................................... 21
Figure 3-13. Collateral Page......................................................................................................................................................22
Figure 4-1. BOOSTXL-DAC-PORT Schematic Page 1............................................................................................................. 23
Figure 4-2. BOOSTXL-DAC-PORT Schematic Page 2............................................................................................................. 24
Figure 4-3. DAC53701EVM Schematic..................................................................................................................................... 25
Figure 4-4. BOOSTXL-DAC-PORT PCB Components Layout..................................................................................................26
Figure 4-5. BOOSTXL-DAC-PORT Top Layer...........................................................................................................................26
Figure 4-6. BOOSTXL-DAC-PORT Bottom Layer..................................................................................................................... 27
Figure 4-7. DAC53701EVM PCB Components Layout............................................................................................................. 27
Figure 4-8. DAC53701EVM Layers........................................................................................................................................... 28
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List of Tables
Table 1-1. Contents of DAC53701EVM Kit.................................................................................................................................. 4
Table 1-2. Required Components Not Included With Kit............................................................................................................. 4
Table 1-3. Related Documentation.............................................................................................................................................. 4
Table 2-1. DAC53701EVM Power Supply Inputs.........................................................................................................................7
Table 2-2. BOOSTXL-DAC-PORT Jumper Settings.................................................................................................................... 7
Table 3-1. BOOSTXL-DAC-PORT J13 Pin Definitions.............................................................................................................. 10
Table 3-2. BOOSTXL-DAC-PORT J14 Pin Definitions.............................................................................................................. 10
Table 3-3. BOOSTXL-DAC-PORT J4 Pin Definitions.................................................................................................................11
Table 3-4. BOOSTXL-DAC-PORT J5 Pin Definitions.................................................................................................................11
Table 3-5. BOOSTXL-DAC-PORT J12 Pin Definitions...............................................................................................................11
Table 3-6. DAC53701EVM J2 Pin Definitions............................................................................................................................13
Table 3-7. DAC53701EVM J1 Pin Definitions............................................................................................................................13
Table 4-1. BOOSTXL-DAC-PORT Bill of Materials....................................................................................................................29
Table 4-2. DAC53701EVM Bill of Materials............................................................................................................................... 31
Trademarks
PMBus™ is a trademark of SMIF, Inc.
Windows™ is a trademark of Microsoft Corporation.
All other trademarks are the property of their respective owners.
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1 Overview
The DAC53701EVM is an easy-to-use platform to evaluate the functionality and performance of the DAC53701
and DAC43701 commercial devices. This EVM is also designed to evaluate the automotive-version devices,
DAC53701-Q1 and DAC43701-Q1.
The 10-bit DAC53701 and 8-bit DAC43701 (DACx3701) are a pin-compatible family of buffered voltage-output
digital-to-analog converters (DACs). These devices have nonvolatile memory (NVM), an internal reference, and
a PMBus™ compatible I2C interface. The DACx3701 operate with either an internal reference or the power
supply as a reference, and provide full-scale output of 1.8 V to 5.5 V. The devices communicate through the I2C
interface. These devices support I2C standard mode (100 kbps), fast mode (400 kbps), and fast mode plus (1
Mbps). The DACx3701 are feature rich, and include features such as PMBus voltage margin commands (for
example, turn on/off, margin high or low, and more), digital slew rate control, user-programmable power up to
high impedance, a standalone waveform generator (square, ramp, and sawtooth), a medical alarm tone
generator (low, medium, and high priority), and a dedicated feedback pin. The EVM provides the GPIO and I2C
programming interface using a PC-based graphical user interface (GUI).
1.1 Kit Contents
Table 1-1 details the contents of the EVM kit. Contact the TI Product Information Center nearest you if any
component is missing. TI highly recommends that the user verify latest versions of the related software at the TI
website, www.ti.com.
Table 1-1. Contents of DAC53701EVM Kit
Item Quantity
DAC53701EVM evaluation board PCB 1
Table 1-2. Required Components Not Included With Kit
Item Quantity
BOOSTXL-DAC-PORT 1
MSP-EXP432E401Y Launchpad (TI Launchpad) 1
TI Launchpad can be purchased from the MSP432E401Y tool folder on www.ti.com.
1.2 Related Documentation from Texas Instruments
The following document provides information regarding Texas Instruments integrated circuits used in the
assembly of the DAC53701EVM. This user's guide is available from the TI web site under literature number
SLAU841. Any letter appended to the literature number corresponds to the document revision that is current at
the time of the writing of this document. Newer revisions may be available from the TI web site at http://
www.ti.com/, or call the Texas Instruments Literature Response Center at [phone] or the Product
Information Center at [phone]. When ordering, identify the document by both title and literature number.
Table 1-3. Related Documentation
Document Literature Number
DAC53701 product data sheet SLASEY5
DAC43701 product data sheet
DAC53701-Q1 product data sheet SLASEW8
DAC43701-Q1 product data sheet
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2 System Setup
2.1 Software Setup
This section provides the procedure for EVM software installation.
2.1.1 Operating Systems
The EVM software is compatible with the Windows™ 7, 8, and 10 operating systems.
2.1.2 Software Installation
The software is available on the device product folder, and can also be found in the GUI Composer Gallery.
Search for DAC53701EVM in the GUI Composer Gallery. Use the down arrow symbol to download the software.
There are two downloads: DAC53701EVM GUI and GUI Composer Runtime. Either download both, or just
download the EVM GUI; the runtime file can be downloaded through the EVM GUI during installation. The
software can also be run online by clicking; however, only after the firmware and driver are upgraded. After the
software is downloaded onto the PC, navigate to the download folder, and run the DAC53701EVM software
executable, as shown in Figure 2-1.
Figure 2-1. DAC53701EVM Software Setup
When the DAC53701EVM software is launched, an installation dialog window opens and prompts the user to
select an installation directory. If left unchanged, the software location defaults to C:\Program Files (x86)\Texas
Instruments\DAC53701 EVM as shown in Figure 2-2. If there is no previous installation of the GUI Composer
Runtime application, the installer also requests for an automatic download from the web. Select either Install
from Web to download and install from the web, or Install from PC and provide the path to the local file that is
already downloaded. The runtime file also installs the USB drivers, unless the drivers are already installed. The
software installation automatically copies the required files and drivers to the local machine.
Figure 2-2. Software Installation Path
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2.1.3 TI Launchpad Firmware Upgrade
The firmware for the TI Launchpad must be upgraded for the first time before using the software. A jumper must
be modified, and the USB cable must be connected to the XDS110 port of the TI Launchpad to download
firmware. The firmware can be programmed to the TI Launchpad using the online tool, UniFlash. This link is also
provided on the Setup page of the GUI. The firmware bin file can be found at <Download Directory>
\DAC53701EVM_1.0.1_installer_win\install_image_DAC53701EVM\DAC53701EVM\firmware\acctrl.0.3.0.3b.bin
after unzipping the file install_image_DAC53701EVM.zip.
Follow the step-by-step procedure below to upgrade the firmware and install the device drivers successfully:
1. Remove jumper JP6 on the TI Launchpad, as shown in step 1 of Figure 2-3.
3 42
Remove
Jumper
Mount
Jumper
1
xxx
xxx
xxx
Figure 2-3. MSP-EXP432E401Y Launchpad (TI Launchpad ) Setup
2. Mount jumper on 5V-OTG. Retain the jumper on 5V-XDS, as shown in step 1 of Figure 2-3.
3. Connect the USB cable to the port on the XDS110 side of the board, as shown in step 2 of Figure 2-3.
4. Connect the USB cable to the PC and open UniFlash. Click on Start Now in the Detect Device section.
5. If the GUI Composer framework is being installed for the first time on the PC, the browser extension and the
TI Cloud Agent must also be installed. Follow the 2-step installation flow prompted on the web page, as
shown in Figure 2-4
Figure 2-4. TI Cloud Agent Installation
6. Press the Refresh or Finish button after the installation is complete. This action should detect the Launchpad.
7. Press Start and browse for <Download Directory>\DAC53701EVM_1.0.1_installer_win
\install_image_DAC53701EVM.\DAC53701EVM\firmware\acctrl.0.3.0.3b.bin. Press Load Image followed by
Verify Image.
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2.2 Hardware Setup
This section provides the overall system setup for the EVM. The hardware setup contains the TI Launchpad
(MSP-EXP432E401Y Launchpad), BOOSTXL-DAC-PORT, and DAC53701EVM. A PC runs the software that
provides an interface to the DAC53701EVM through the TI Launchpad.
The TI Launchpad generates 5 V of power that can be used as VDD for the DAC. The TI Launchpad also
generates 3.3 V of power that can be used for I2C pullups. The IO ports of the Analog EVM Controller and level
translators used on the BOOSTXL-DAC-PORT and DAC53701EVM can withstand a maximum of 3.6-V IO
levels. The TI Launchpad also generates digital signals used to communicate with the EVM board.
The BOOSTXL-DAC-PORT is a generic platform used for catalog DACs that provides a predefined interface to
connect a DAC evaluation module. The BOOSTXL-DAC-PORT also provides various options for power supply,
reference, and digital signals. A connector is provided on the BOOSTXL-DAC-PORT for external power supplies.
This platform is designed to host additional boards stacked up on the BOOSTXL-DAC-PORT in order to provide
extended functions. Figure 2-5 displays the system hardware setup.
XDS110
USB Port
Analog EVM
Controller
(MSP432E401Y)
BOOSTXL-DAC-PORT
Optional Function
Extender Card
OTG USB
Port (U7)
xx
xx
xx
xx
xx
xx
xxx
xxx
xxx
xxx
xxx
xxx
xxx
xxx
DAC EVM
Optional
Jumpers/Test
Points
Jumpers/Test Points
Figure 2-5. Hardware Setup
2.2.1 Power Configurations and Jumper Settings
The DAC53701EVM provides electrical connections to the device supply pins. The connectors and optional
configurations are shown in Table 2-1. The jumper settings on the BOOSTXL-DAC-PORT are crucial to the
proper functioning of the DAC53701EVM. Table 2-2 provides the details of the possible jumper settings on the
BOOSTXL-DAC-PORT.
Table 2-1. DAC53701EVM Power Supply Inputs
DAC53701EVM
Connector Supply Name Voltage Range
J2.1 VDD 1.8 V to 5.5 V (5 V available on TI Launchpad), jumper J9.1-2 on BOOSTXL-DAC-PORT
J1.8 VIO 1.8 V to 3.6 V (3.3 V available on TI Launchpad), jumper J10.1-2 on BOOSTXL-DAC-PORT
J1.7 DAC_VIO 1.8 V to 3.6 V, jumper J11.1-2 on BOOSTXL-DAC-PORT
J1.1 GND 0 V
Table 2-2. BOOSTXL-DAC-PORT Jumper Settings
Jumper Default Position Available Option Description
J3 1-2: Onboard reference 2-3: External reference External or onboard reference selection
J6 2-3: Zener reference 1-2: VDD reference Zener or VDD reference
J7 2-3: 2.5-V reference 1-2: 5-V reference 2.5-V or 5-V reference selection
J8 2-3: Unused on DAC53701 1-2: Unused on DAC53701 External or onboard LDAC selection
J9 1-2: 5 V from TI Launchpad 2-3: External VDD 5-V or external VDD
J10 1-2: 3.3 V from TI Launchpad 2-3: External VIO 3.3-V or external VIO
J11 Closed: DAC_VIO is connected to VIO Open: DAC_VIO off DAC_VIO on or off
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2.2.2 Connecting the Hardware
After the TI Launchpad firmware is upgraded as described in Section 2.1.3, and power and jumper
configurations set up as per Section 2.2.1, the BOOSTXL-DAC-PORT and DAC53701EVM can be connected as
shown in Figure 2-6. Connect the USB cable from the TI Launchpad OTG USB Port (U7) to the PC.
Figure 2-6. Hardware Setup Guidelines
2.2.3 Electrostatic Discharge Warning
Many of the components on the DAC53701EVM are susceptible to damage by electrostatic discharge (ESD).
Observe proper ESD handling precautions when unpacking and handling the EVM, including the use of a
grounded wrist strap at an approved ESD workstation.
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3 Detailed Description
3.1 Hardware Description
The following sections provide detailed information on the EVM hardware and jumper configuration settings.
3.1.1 Theory of Operation for the BOOSTXL-DAC-PORT
The BOOSTXL-DAC-PORT is a generic evaluation platform for catalog DACs that provides various options for
power supply, reference, communication interfaces, and GPIO for a DAC EVM. The DAC EVM interfaces with a
predefined set of signals common to a precision DAC. The block diagram of this board is shown in Figure 3-1.
External
Power
I2C
SPI/GPIO SPI/GPIO
5 V / 3.3 V
Analog IO
Power
External Refererence
DAC EVM Interface
Reference Jumper Settings Power-Supply Jumper Settings
Digital Level
Translator
I2C Level
Translator
Analog and Power Supply Function Extender
Launchpad Interface Launchpad Interface
Figure 3-1. BOOSTXL-DAC-PORT Hardware Block Diagram
3.1.1.1 Signal Definition of the BOOSTXL-DAC-PORT
The BOOSTXL-DAC-PORT provides hardware connectors for the TI Launchpad (J13, J14), external power
(J12), the DAC53701EVM (J1, J2), and the external function extender (J4, J5). The descriptions are provided in
Table 3-1 through Table 3-5.
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Table 3-1. BOOSTXL-DAC-PORT J13 Pin Definitions
Pin# Signal Description
11 GPIO General-purpose I/O
12 CS SPI CS or general-purpose I/O
13 GPIO SPI
14 MISO SPI MISO
15 MOSI SPI MOSI
16 RST MCU reset output
17 GPIO General-purpose I/O
18 GPIO General-purpose I/O
19 GPIO General-purpose I/O
20 GND Ground
31 GPIO General-purpose I/O
32 GPIO General-purpose I/O
33 GPIO General-purpose I/O
34 GPIO General-purpose I/O
35 EXT_LDAC External LDAC I/O
36 EXT_LDAC External LDAC I/O
37 SPI_BUF_EN Digital, SPI buffer enable
38 GPIO General-purpose I/O
39 GPIO General-purpose I/O
40 GPIO General-purpose I/O
Table 3-2. BOOSTXL-DAC-PORT J14 Pin Definitions
Pin# Signal Description
1 +3.3V 3.3-V power supply
2 GPIO General-purpose I/O
3 GPIO General-purpose I/O
4 GPIO General-purpose I/O
5 GPIO General-purpose I/O
6 GPIO General-purpose I/O
7 SCLK_A0 SPI SCLK or I2C A0
8 GPIO General-purpose I/O
9 SCL I2C SCL
10 SDA I2C SDA
21 +5V 5-V power supply
22 GND Ground
23 GPIO General-purpose I/O
24 GPIO General-purpose I/O
25 VDD_SENSE Sense Input for VDD
26 VIO_SENSE Sense Input for VIO
27 GPIO General-purpose I/O
28 GPIO General-purpose I/O
29 GPIO General-purpose I/O
30 GPIO General-purpose I/O
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Table 3-3. BOOSTXL-DAC-PORT J4 Pin Definitions
Pin# Signal Description
1 AIO0 Analog I/O
2 AGND Analog ground
3 AIO2 Analog I/O
4 AIO4 Analog I/O
5 AGND Analog ground
6 AIO6 Analog I/O
7 AIO8 Analog I/O
8 AGND Analog ground
9 AIO10 Analog I/O
10 AIO12 Analog I/O
11 AGND Analog ground
12 AIO14 Analog I/O
13 EXT_REF External reference input
14 GND Ground
15 VCC VCC output
16 VDD VDD output
Table 3-4. BOOSTXL-DAC-PORT J5 Pin Definitions
Pin# Signal Description
1 AIO1 Analog I/O
2 AGND Analog Ground
3 AIO3 Analog I/O
4 AIO5 Analog I/O
5 AGND Analog Ground
6 AIO7 Analog I/O
7 AIO9 Analog I/O
8 AGND Analog Ground
9 AIO11 Analog I/O
10 AIO13 Analog I/O
11 AGND Analog Ground
12 AIO15 Analog I/O
13 REFGND External Reference Ground
14 GND Ground
15 VSS VSS Output
16 VIO or DAC_VIO VIO or DAC_VIO Output
Table 3-5. BOOSTXL-DAC-PORT J12 Pin Definitions
Pin# Signal Description
1 VCC High-voltage positive power supply
2 VSS High-voltage negative power supply
3 GND Ground
4 EXT_VDD External VDD
5 EXT_VIO External VIO
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3.1.2 Theory of Operation for the DAC53701EVM Hardware
The block diagram of the DAC53701EVM board is displayed in Figure 3-2. The EVM board connects to
BOOSTXL-DAC-PORT with two 16-pin connectors. These headers provide access to all DAC pins. The EVM
board also houses EEPROM and an I2C buffer.
Figure 3-2. DAC53701EVM Hardware Block Diagram
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3.1.2.1 Signal Definition of the DAC53701EVM
The DAC53701EVM provides access to all DAC pins through connection J1 and J2, as listed in Table 3-6 and
Table 3-7.
Table 3-6. DAC53701EVM J2 Pin Definitions
Pin# Signal Description
1 VDD VDD power supply
2 NC Not connected
3 NC Not connected
4 SCL I2C SCL
5 REF Reference input
6 NC Not connected
7 NC Not connected
8 NC Not connected
9 NC Not connected
10 NC Not connected
11 NC Not connected
12 NC Not connected
13 AGND Analog ground
14 AGND Analog ground
15 AGND Analog ground
16 AGND Analog ground
Table 3-7. DAC53701EVM J1 Pin Definitions
Pin# Signal Description
1 GND Analog ground
2 NC Not connected
3 NC Not connected
4 SDA I2C SDA
5 VOUT DAC output
6 VFB DAC feedback pin
7 DAC_VIO Pullup for DAC I2C signals
8 VIO Power supply for EEPROM
9 DAC_GPI GPI Input for DAC53701
10 NC Not connected
11 NC Not connected
12 LDO_CAP LDO bypass capacitor
13 AGND Analog ground
14 AGND Analog ground
15 AGND Analog ground
16 AGND Analog ground
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3.2 Software Description
This section describes the features of the DAC53701 EVM software, and discusses how to use these features.
The software provides basic control of all the registers and functions to the DAC53701 device.
3.2.1 Starting the Software
To launch the software, locate the Texas Instruments folder in the All Programs menu, and select the DAC53701
EVM icon.
Figure 3-3. DAC53701EVM GUI Location
Figure 3-4 shows that if the Analog EVM Connector is connected correctly, the status bar at the bottom of the
screen displays Hardware Connected. If the Analog EVM Controller is not properly connected or not connected
at all, the status bar displays Hardware not connected. In case the Hardware not connected status persists even
after the hardware is connected, go to Options → Serial Port, and change the port to the other available port with
the (Texas Instruments) or ACCtrl tag. Out of the two ports with these tags, one port should connect.
Figure 3-4. DAC53701EVM GUI Connection Detection
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3.2.2 Software Features
The DAC53701EVM incorporates interactive functions that help configure the DAC53701 device. These
functions are built into several GUI pages, as shown in the following subsections. The Menu allows the user to
switch between pages, with each page representing a feature of the software.
3.2.2.1 Home Page
THe Home page, as shown in Figure 3-5, provides basic information and navigation to other pages. Click on
Learn More... to get more information on the device.
Figure 3-5. Software Home Page
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3.2.2.2 Setup Page
The Setup page, as shown in Figure 3-6, guides the user to perform a one-time firmware upgrade for the TI
Launchpad, and details how the TI Launchpad, BOOSTXL-DAC-PORT, and DAC53701EVM are stacked. This
page also shows the default jumper settings for the BOOSTXL-DAC-PORT.
Figure 3-6. Setup Page
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3.2.2.3 DAC Quick-Start Page
This page is divided in to four tabs: Basic DAC, Margining, Functions, and Alarms. The following subsections
describe each tab.
3.2.2.3.1 Basic DAC Tab
The Basic DAC quick-start tab is shown in Figure 3-7provides an interface to quickly power up, select the
reference and output span, and program the output voltage (decimal) for the DAC53701. The DAC53701 comes
in Hi-Z power-down mode by default.
Note
The basic DAC setup for power up, reference selection, and output span selection available in this tab
is common to all the tab functions.
Figure 3-7. DAC Quick-Start Page: Basic DAC Tab
The EEPROM PROGRAM button is used to write the latest register settings to the EEPROM.
The RELOAD button is used to retrieve the settings stored in the EEPROM.
The GPI pin programming has not been provided in this version of the software, although the EVM hardware has
options for providing signals to DAC53701 through header J2
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3.2.2.3.2 Margining Tab
The second tab on the Quick-Start page is Margining, as shown in Figure 3-8. This tab provides the settings for
margin-low, margin-high, and nominal DAC outputs, along with code-step and slew-rate for the ramp generation.
Figure 3-8. DAC Quick-Start Page: Margining Tab
The margin-low and the margin-high triggers are by the respective buttons.
The register settings are programmed or retrieved using the EEPROM PROGRAM or RELOAD buttons,
respectively.
The trigger bits are not loaded to the EEPROM because they are edge sensitive.
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3.2.2.3.3 Functions Tab
The next tab on the Quick-Start page is Functions for function generation, as shown in Figure 3-9. This page
provides the ramp programming done through code-step and slew-rate settings.
Figure 3-9. DAC Quick Start Page: Function Generation
The most basic setting for this functionality is the function selection: triangular wave, saw-tooth wave, reverse
saw-tooth wave, and square wave.
The margin-low and margin-high settings define the lower and the upper bounds of the waveform, respectively.
The toggle button starts or stops the defined function generation.
Any change to the function settings can only be done when the function is off.
The register settings can be programmed or retrieved using the EEPROM PROGRAM or RELOAD buttons,
respectively.
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3.2.2.3.4 Alarms Tab
The Alarm tab on the Quick-Start page is a special medical alarm function provided by the DAC53701. The
settings for this function are as shown in Figure 3-10. The ramp generation settings are similar to that of function
generation: code-step, slew-rate, margin-low, and margin-high.
Figure 3-10. DAC Quick-Start Page: Alarms Tab
In addition to these settings, the medical alarms have three more settings: interburst time, pulse-off time, and
pulse-on time. These settings have four common settings that take different values depending on the type of
alarm selected. Refer to the DAC53701 data sheet for these timing details. There are three types of alarms: low-
priority, medium-priority, and high-priority. The radio buttons are used to trigger any one of the alarms. The
register settings are programmed or retrieved using the EEPROM PROGRAM or RELOAD buttons, respectively.
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