Texas Instruments BP-DAC81404EVM User manual

1
SLAU825–June 2020
Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
User's Guide
SLAU825–June 2020
BP-DAC81404EVM, BP-DAC61402EVM
This user’s guide describes the characteristics, operation, and use of the BP-DAC81404 evaluation
module (EVM) and BP-DAC61402 EVM BoosterPack™ plug-in modules. This EVM is designed to
evaluate the performance of the DAC81404 and DAC61402 buffered voltage output DACs in a variety of
configurations. Throughout this document, the terms evaluation board, evaluation module, and EVM are
synonymous with the BP-DAC81404EVM and BP-DAC61402EVM. This document includes a schematic,
reference printed-circuit board (PCB) layouts, and a complete bill of materials.

www.ti.com
2SLAU825–June 2020
Submit Documentation Feedback
Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
Contents
1 Overview ..................................................................................................................... 3
1.1 Kit Contents ......................................................................................................... 3
1.2 Related Documentation from Texas Instruments .............................................................. 4
2 System Setup ................................................................................................................ 5
2.1 Software Setup...................................................................................................... 5
2.2 Hardware Setup .................................................................................................... 8
3 Detailed Description........................................................................................................ 10
3.1 Hardware Description ............................................................................................ 10
3.2 Software Description ............................................................................................. 12
4 Schematic, PCB Layout, and Bill of Materials.......................................................................... 18
4.1 BP-DAC81404EVM, BP-DAC61402EVM Schematic ........................................................ 19
4.2 PCB Layout ........................................................................................................ 21
4.3 BP-DAC81404EVM, BP-DAC61402EVM Bill of Materials................................................... 23
List of Figures
1 BP-DAC81404EVM, BP-DAC61402EVM Software Setup ............................................................. 5
2 Software Installation Path .................................................................................................. 6
3 LaunchPad™ Setup......................................................................................................... 7
4 TI Cloud Agent Installation ................................................................................................. 7
5 Hardware Setup.............................................................................................................. 8
6 BP-DAC81404EVM, BP-DAC61402EVM Hardware Block Diagram................................................ 10
7 LaunchPad™ Interface Pinout............................................................................................ 11
8 BP-DAC81404EVM, BP-DAC61402EVM GUI Location .............................................................. 12
9 GUI Connection Detection ................................................................................................ 12
10 Software Home Page...................................................................................................... 13
11 Setup Page.................................................................................................................. 14
12 DAC Quick-Start Page: Basic DAC Tab ................................................................................ 15
13 Register Map Page ........................................................................................................ 16
14 Register Page Options .................................................................................................... 16
15 Collateral Page ............................................................................................................. 17
16 Schematic Page 1.......................................................................................................... 19
17 Schematic Page 2.......................................................................................................... 20
18 PCB Layout: Top Layer ................................................................................................... 21
19 PCB Layout: Ground Plane............................................................................................... 21
20 PCB Layout: Power Plane ................................................................................................ 22
21 PCB Layout: Bottom Layer................................................................................................ 22
List of Tables
1 DAC81404EVM Kit Contents............................................................................................... 3
2 DAC61402EVM Kit Contents............................................................................................... 3
3 Required Components Not Included With Kit............................................................................ 3
4 Related Documentation..................................................................................................... 4
5 BP-DAC81404EVM, BP-DAC61402EVM Power Supply Inputs....................................................... 9
6 BP-DAC81404EVM, BP-DAC61402EVM Jumper Settings ............................................................ 9
7 BP-DAC81404EVM, BP-DAC61402EVM Bill of Materials ........................................................... 23
Trademarks
BoosterPack, LaunchPad are trademarks of Texas Instruments.
Microsoft, Windows are registered trademarks of Microsoft Corporation.
All other trademarks are the property of their respective owners.

www.ti.com Overview
3
SLAU825–June 2020
Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
1 Overview
The BP-DAC81404EVM, BP-DAC61402EVM are an easy-to-use platform to evaluate the functionality and
performance of the DAC81404 device. The 16-bit DAC81404 (quad-channel) and 12-bit DAC61402 (dual-
channel) (DACx140x) are a pin-compatible family of buffered output (up to ±20 V) digital-to-analog
converters (DACs) with integrated 2.5-V internal reference. These devices are specified monotonic by
design and offer excellent linearity of less than 1 LSB. Additionally, the DACx140x implements per
channel sense pins to eliminate IR drop and to sense up to ±12 V of ground bounce.
The DACx140x includes reliability features such as CRC error check, short circuit protection, and thermal
alarm. These devices are characterized for operation over the temperature range of –40ºC to 125ºC and
are available in a very small 32-pin QFN package. The performance and feature set combined with a
small package make the DACx140x an excellent choice for end equipment such as automated test
equipment, analog output modules, servo motor drives, and precision data acquisition cards.
The DACx140x devices incorporate a power-on-reset circuit that ensures the DAC output powers in
power-down mode and remains in this mode until the outputs are enabled.
The device communicates through speed 4-wire serial interface (SPI) that supports operation from 1.7 V
to 5.5 V.
The EVM provides the GPIO and SPI programming interface using a PC-based graphical user interface
(GUI). This EVM requires the MSP-EXP432E401Y LaunchPad™ for interfacing with the PC-based GUI.
1.1 Kit Contents
Table 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. DAC81404EVM Kit Contents
Item Quantity
BP-DAC81404EVM BoosterPack 1
Table 2. DAC61402EVM Kit Contents
Item Quantity
BP-DAC61402EVM BoosterPack 1
Table 3. Required Components Not Included With Kit
Item Quantity
MSP-EXP432E401Y LaunchPad 1
The MSP-EXP432E401Y LaunchPad can be purchased from the MSP432E401Y tool folder on
www.ti.com.

Overview www.ti.com
4SLAU825–June 2020
Submit Documentation Feedback
Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
1.2 Related Documentation from Texas Instruments
The following document provides information regarding Texas Instruments integrated circuits used in the
assembly of the BP-DAC81404EVM and BP-DAC61402EVM. This user's guide is available from the TI
web site under literature number SLAU825. 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 4. Related Documentation
Document Literature Number
DAC81404 product data sheet SLASEH2
DAC61402 product data sheet SLASEH3

www.ti.com System Setup
5
SLAU825–June 2020
Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
2 System Setup
2.1 Software Setup
This section provides the procedure for EVM software installation.
NOTE: The BP-DAC81404EVM and BP-DAC61402EVM have separate software. This document
mainly describes the BP-DAC81404EVM software for brevity. This BP-DAC61402EVM
software is similar to that of BP-DAC81404EVM except the changes in the number of DAC
channels and the reduction of the register map.
2.1.1 Software Installation
The EVM software is compatible with the Microsoft®Windows®7, 8, and 10 operating systems. The
software is found in the GUI Composer Gallery. Search for BP-DAC81404EVM or BP-DAC61402EVM in
the GUI Composer Gallery. Use the down arrow symbol to download the software. There are two
downloads: BP-DAC81404EVM or BP-DAC61402EVM GUI and the respective 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; 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 BP-DAC81404EVM or BP-DAC61402EVM software executable, as Figure 1 shows.
Figure 1. BP-DAC81404EVM, BP-DAC61402EVM Software Setup
When the BP-DAC81404EVM or BP-DAC61402EVM 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\BP-DAC81404 EVM,asFigure 2 shows. 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 executable
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.

System Setup www.ti.com
6SLAU825–June 2020
Submit Documentation Feedback
Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
Figure 2. Software Installation Path

3 42
Remove
Jumper
Mount
Jumper
1
xxx
xxx
xxx
www.ti.com System Setup
7
SLAU825–June 2020
Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
2.1.2 LaunchPad™ Firmware Upgrade
Before using the software for the first time, upgrade the firmware for the LaunchPad. The firmware is
programmed to the LaunchPad using the online tool, UniFlash. This link is also provided on the Setup
page of the GUI. After unzipping the install_image_BP-DAC81404EVM.zip file, the firmware bin file is
found at <Download Directory>\BP-DAC81404EVM _1.0.1_installer_win\install_image_BP-
DAC81404EVM\BP-DAC81404EVM\firmware\acctrl.bin.
Use the following step-by-step procedure to upgrade the firmware and install the device drivers
successfully:
1. Remove jumper JP6 on the LaunchPad, as shown in step 1 of Figure 3.
Figure 3. LaunchPad™ Setup
2. Mount the jumper on 5V-OTG. Retain the jumper on 5V-XDS, as shown in step 1 of Figure 3.
3. Connect the USB cable to the port on the XDS110 side of the board, as shown in step 2 of Figure 3.
4. Connect the USB cable to 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 4
Figure 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>\BP-
DAC81404EVM_1.0.1_installer_win\install_image_BP-DAC81404EVM \BP-
DAC81404EVM\firmware\acctrl.bin. Press Load Image followed by Verify Image.

System Setup www.ti.com
8SLAU825–June 2020
Submit Documentation Feedback
Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
2.2 Hardware Setup
This section provides the overall system setup for the EVM. The hardware setup contains the MSP-
EXP432E401Y LaunchPad and the BP-DAC81404EVM orBP-DAC61402EVM. A PC runs the software
that provides an interface to the BP-DAC81404EVM through the LaunchPad.
The BP-DAC81404EVM, BP-DAC61402EVM require external power supplies, as described later in this
document. The 3.3-V and 5-V power supplies from the LaunchPad can be used for IOVDD and DVDD for
the DAC, respectively, using jumper options. The LaunchPad generates the digital signals used to
communicate with the EVM board.
Figure 5 displays the hardware setup.
Figure 5. Hardware Setup

www.ti.com System Setup
9
SLAU825–June 2020
Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
2.2.1 Power Configurations and Jumper Settings
The BP-DAC81404EVM, BP-DAC61402EVM provide electrical connections to the device supply pins. The
connectors and optional configurations are shown in Table 5, and Table 6 shows the EVM jumper
settings.
Table 5. BP-DAC81404EVM, BP-DAC61402EVM Power Supply Inputs
BP-DAC81404EVM, BP-DAC61402EVM
Connector Supply Name Voltage Range (Max)
J17: Pin 1 DAC_VDD 0 to 5.5 V
J17: Pin 2 GND –0.3 to 0.3 V
J17: Pin 3 GND –0.3 to 0.3 V
J17: Pin 4 DAC_AVDD 41.5 V
J17: Pin 5 DAC_AVSS –21.5 V
NOTE: AVDD - AVSS must not exceed 42 V.
Table 6. BP-DAC81404EVM, BP-DAC61402EVM Jumper Settings
Jumper Description Default Position Alternate Position
J2 LDAC Pulldown 1–2 : LDAC is LOW None: LDAC is HIGH
J3 CLR Pulldown None: CLR is HIGH 1–2 : CLR is LOW
J5 VSENSE_N_A 1–2: VSENSE_N_A is ground None
J6 VSENSE_N_B 1–2: VSENSE_N_B is ground None
J7 VSENSE_N_C 1–2: VSENSE_N_C is ground None
J8 VSENSE_N_D 1–2: VSENSE_N_D is ground None
J11 DAC_AVSS (Bipolar/Unipolar
Selection) 2–3: DAC is in Unipolar power supply mode, AVSS to ground 1–2 : DAC is in Bipolar power supply mode, AVSS can be up to –21.5 V
J14 High Current Stage Enable/Disable None : DAC VOUT is not connected
to high current Stage 1–2: DAC output Channel B is connected to High current stage
J16 External Reference None : External Reference is not
connected to REFIO 1–2: External reference of 2.5 V is connected to REFIO
J18 100 Ωl oad connection for high
current stage None : High current output stage is unloaded 1–2: High current output stage is loaded with 100 Ω
J19 External DAC IOVDD 2–3 : DAC IOVDD is provided by
LaunchPad Interface 1–2: DAC IOVDD is provided by external connector J20
J21 Input ground for High Current
Output stage 1–2: Input for high current output stage is grounded to minimize
power consumption when in
disabled state.
None : Input is provided by DAC VOUT
from channel B
2.2.2 Connecting the Hardware
After the LaunchPad firmware is upgraded as described in Section 2.1.2, and power and jumper
configurations done as per Section 2.2.1, the BP-DAC81404EVM or BP-DAC61402EVM and the
LaunchPad can be connected as Figure 5 shows. Connect the USB cable from the LaunchPad OTG USB
port (U7) to the PC.
2.2.3 Electrostatic Discharge Caution
Many of the components on the BP-DAC81404EVM, BP-DAC61402EVM and the LaunchPad 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.

DAC81404
DAC_AVDDDAC_DVDDDAC_IOVDD
AVSS
VOUT A..D
GNDDGND
REFIO
1 F
REF6025
GND
VSENSE_N A..D
VSENSE_P A..D
CCOMP A..D
SPI
LAUNCHPAD
INTERFACE
GND
0 
470pF
DAC_OUTPUTS
100mA Current
Output stage
AVSS
AVDD
100 
VOUT_B
+/- 10V @100mA Max
GND
GND
AEVM_3.3V
DAC_IOVDD_EX T
DAC_IOVDD
DAC_DVDD
DAC_AVDD
DAC_AVSS
GND
DAC_IOVDD_EX T
DGND GND
DAC_AVSS
AVSS
Detailed Description www.ti.com
10 SLAU825–June 2020
Submit Documentation Feedback
Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
3 Detailed Description
3.1 Hardware Description
The following subsections provide detailed information on the EVM hardware and jumper configuration
settings.
3.1.1 Theory of Operation
Figure 6 shows the block diagram of the BP-DAC81404EVM, DAC61402EVM board. All grounds are
shorted together using single-point shorts. The EVM board connects to the LaunchPad with the
BoosterPack connectors. There is an onboard reference, using the REF6025, which generates a 2.5-V
voltage reference, which can be used as an external reference for the DAC. Each channel outputs (named
as DAC_VOUT_A, DAC_VOUT_B, DAC_VOUT_C, and DAC_VOUT_D) are available in a 5-pin connector
which includes the force and sense connections for the DAC. A 470-pF capacitor is connected from the
CCOMP pin to DAC output to compensate for the stability issues while driving large capacitive loads. DAC
power supplies can be configured through jumper options to allow operation for bipolar or unipolar. The
digital I/O supply of the DAC is provided by the LaunchPad interface by default; however, an external
option is also present on the board.
For applications requiring high current drive capability such as motor control or programmable power
supplies, an option is provided in the EVM to have up to 100-mA output current through external
transistors. To enable high current option, place jumpers J14 and J18 and remove jumper from J21.
Figure 6. BP-DAC81404EVM, BP-DAC61402EVM Hardware Block Diagram

1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
3v3
LD AC
SCLK
GND
21
22
23
24
25
26
27
28
29
30
40
39
38
37
36
35
34
33
32
31
5v
GND
CLR
Pin aligns with BoosterPack pinout standard
SYNC
SDO
SDIN
RST
www.ti.com Detailed Description
11
SLAU825–June 2020
Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
3.1.2 Signal Definition for the LaunchPad™ Interface
The BP-DAC81404EVM, BP-DAC61402EVM interfaces with the LaunchPad through connectors J1 and
J4. Figure 7 shows the pin definitions.
Figure 7. LaunchPad™ Interface Pinout

Detailed Description www.ti.com
12 SLAU825–June 2020
Submit Documentation Feedback
Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
3.2 Software Description
This section describes the features of the BP-DAC81404EVM, BP-DAC61402EVM software, and
discusses how to use these features. The software provides basic control of all the registers and functions
of the DAC81404 / DAC61402 device.
3.2.1 Starting the Software
To launch the software, locate the Texas Instruments folder in the All Programs menu, and select the BP-
DAC81404EVM or BP-DAC61402EVM icon, as Figure 8 shows.
Figure 8. BP-DAC81404EVM, BP-DAC61402EVM GUI Location
Figure 9 shows that if the LaunchPad connector is connected correctly, the status bar at the bottom of the
screen displays Hardware Connected. If the LaunchPad 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. One of the two ports with these tags will connect to the
hardware.
Figure 9. GUI Connection Detection

www.ti.com Detailed Description
13
SLAU825–June 2020
Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
3.2.2 Software Features
The BP-DAC81404EVM, BP-DAC61402EVM GUI incorporate interactive functions that help configure the
DAC81404 or DAC61402 device. These functions are built into several GUI pages, as the following
sections show. The Menu button allows the user to switch between the pages, with each page
representing a feature of the software.
3.2.2.1 Home Page
The Home page, shown in Figure 10, provides the basic information and navigation to other pages. Click
on Learn More... to get more information on the device.
Figure 10. Software Home Page

Detailed Description www.ti.com
14 SLAU825–June 2020
Submit Documentation Feedback
Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
3.2.2.2 Setup Page
The Setup page, shown in Figure 11, guides the user to perform a one-time firmware upgrade for the
LaunchPad.
Figure 11. Setup Page

www.ti.com Detailed Description
15
SLAU825–June 2020
Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
3.2.2.3 DAC Quick-Start Page
The DAC Quick-Start page provides the functions to quickly get started with the EVM. This page provides
interfaces for both global and channel-specific configuration.
Figure 12. DAC Quick-Start Page: Basic DAC Tab

Detailed Description www.ti.com
16 SLAU825–June 2020
Submit Documentation Feedback
Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
3.2.2.4 Register Map Page
The Register Map page, shown in Figure 13, allows the user to access low-level communication directly
with the DAC81404 / DAC61402 registers. Selecting a register on the Register Map list shows a
description of the values in that register, as well as information on the register address, default value, size,
and current value. Values are read from and written to the registers by writing to the Value or bit field of
the GUI.
Figure 13. Register Map Page
There are some configuration lists and action buttons provided on the Register Map page. To store the
values of the register map locally, press the Save Registers button under the File menu option.
Additionally, recall and load the stored configuration files through the Load Registers button. Other options
selectable by the user are the Auto Read Interval,Read Register,Read All Registers,Write Register,
Write All Registers, and Update Mode buttons. These buttons are displayed in Figure 14. The Write
Register and Write All Registers buttons are enabled only with Deferred update mode. Deferred mode
initiates a write operation only when the Write Register or the Write All Registers button is pressed. By
default, the Immediate update mode is selected for the Register Map page write operations.
Figure 14. Register Page Options

www.ti.com Detailed Description
17
SLAU825–June 2020
Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
3.2.2.5 Collateral Page
Figure 15 shows a page that provides links for all the collateral on the DAC81404 / DAC61402 device.
Figure 15. Collateral Page

Schematic, PCB Layout, and Bill of Materials www.ti.com
18 SLAU825–June 2020
Submit Documentation Feedback
Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
4 Schematic, PCB Layout, and Bill of Materials
This section contains the complete bill of materials and schematic diagram for the BP-DAC81404EVM, BP-DAC61402EVM.
NOTE: The schematics and layout for both BP-DAC81404EVM and BP-DAC61402EVM are identical except the DAC part number.

www.ti.com Schematic, PCB Layout, and Bill of Materials
19
SLAU825–June 2020
Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
4.1 BP-DAC81404EVM, BP-DAC61402EVM Schematic
Figure 16. Schematic Page 1

Schematic, PCB Layout, and Bill of Materials www.ti.com
20 SLAU825–June 2020
Submit Documentation Feedback
Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
Figure 17. Schematic Page 2