Texas Instruments BP-DAC11001EVM Bedienungsanleitung

SLAU806–October 2019

BP-DAC11001EVM

User's Guide

SLAU806–October 2019

BP-DAC11001EVM

This user’s guide describes the characteristics, operation, and use of the BP-DAC11001 evaluation

module (EVM) BoosterPack™ plug-in module. This EVM is designed to evaluate the performance of the

DAC11001 buffered voltage output DAC in a variety of configurations. Throughout this document, the

terms evaluation board, evaluation module, and EVM are synonymous with the BP-DAC11001EVM. This

document includes a schematic, reference printed-circuit board (PCB) layouts, and a complete bill of

materials.

Contents

1 Overview ..................................................................................................................... 3

1.1 Kit Contents ......................................................................................................... 3

1.2 Related Documentation from Texas Instruments .............................................................. 3

2 System Setup ................................................................................................................ 4

2.1 Software Setup ..................................................................................................... 4

2.2 Hardware Setup .................................................................................................... 6

3 Detailed Description......................................................................................................... 8

3.1 Hardware Description ............................................................................................. 8

3.2 Software Description ............................................................................................. 10

4 Schematic, PCB Layout, and Bill of Materials.......................................................................... 16

4.1 BP-DAC11001EVM Schematic ................................................................................. 16

4.2 PCB Layout ........................................................................................................ 20

4.3 BP-DAC11001EVM Bill of Materials............................................................................ 23

List of Figures

1 BP-DAC11001EVM Software Setup ...................................................................................... 4

2 Software Installation Path .................................................................................................. 4

3 Launchpad Setup............................................................................................................ 5

4 TI Cloud Agent Installation ................................................................................................. 5

5 Hardware Setup.............................................................................................................. 6

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BP-DAC11001EVM

6 BP-DAC11001EVM Hardware Block Diagram........................................................................... 8

7 Launchpad Interface Pinout................................................................................................ 9

8 BP-DAC11001EVM GUI Location........................................................................................ 10

9 GUI Connection Detection ................................................................................................ 10

10 Software Home Page...................................................................................................... 11

11 Setup Page.................................................................................................................. 12

12 DAC Quick-Start Page: Basic DAC Tab ................................................................................ 13

13 Register Map Page ........................................................................................................ 14

14 Register Page Options .................................................................................................... 14

15 Collateral Page ............................................................................................................. 15

16 Schematic Page 1.......................................................................................................... 16

17 Schematic Page 2.......................................................................................................... 17

18 Schematic Page 3.......................................................................................................... 18

19 Schematic Page 4.......................................................................................................... 19

20 PCB Components: Top Overlay.......................................................................................... 20

21 PCB Components: Bottom Overlay...................................................................................... 20

22 PCB Layout: Top Layer ................................................................................................... 21

23 PCB Layout: Ground Plane............................................................................................... 21

24 PCB Layout: Power Plane ................................................................................................ 22

25 PCB Layout: Bottom Layer................................................................................................ 22

List of Tables

1 Kit Contents .................................................................................................................. 3

2 Required Components Not Included With Kit............................................................................ 3

3 Related Documentation..................................................................................................... 3

4 BP-DAC11001EVM Power Supply Inputs................................................................................ 7

5 BP-DAC11001EVM Jumper Settings ..................................................................................... 7

6 BP-DAC11001EVM Bill of Materials .................................................................................... 23

Trademarks

BoosterPack is a trademark of Texas Instruments Inc.

Windows is a trademark of Microsoft Corporation.

All other trademarks are the property of their respective owners.

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Overview

SLAU806–October 2019

BP-DAC11001EVM

1 Overview

The BP-DAC11001EVM is an easy-to-use platform to evaluate the functionality and performance of the

DAC11001 device. The DAC11001 is a highly accurate, low-noise, voltage-output, single-channel, digital-

to-analog converter (DAC). The DAC11001 is specified monotonic by design, and offers excellent linearity

of less than 4 LSB (max) across all ranges.

The unbuffered voltage output offers low-noise performance (7 nV/√Hz) in combination with fast settling

time (1 μs), making this device an excellent choice for low-noise, high-speed applications. The DAC11001

integrates an enhanced deglitch circuit with range- and code-independent symmetrical ultra-low glitch (1.5

nV-s) to enable clean waveform ramps with ultra-low harmonic distortion (THD).

The DAC11001 device incorporates a power-on-reset (POR) circuit so that the DAC powers on with

known values in the registers. With external references, DAC output ranges from VREFPF to VREFNF can be

achieved, including asymmetric output ranges.

The DAC11001 uses a versatile 4–wire serial interface that operates at clock rates of up to 50 MHz. The

DAC11001 is specified over the industrial temperature range of –40°C to +125°C.

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. Kit Contents

Item Quantity

BP-DAC11001EVM BoosterPack 1

Table 2. 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.

1.2 Related Documentation from Texas Instruments

The following document provides information regarding Texas Instruments integrated circuits used in the

assembly of the BP-DAC11001EVM. This user's guide is available from the TI web site under literature

number SLAU806. 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 (800) 477-8924 or

the Product Information Center at (972) 644-5580. When ordering, identify the document by both title and

literature number.

Table 3. Related Documentation

Document Literature Number

DAC11001 product data sheet SLASEL0

System Setup

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2 System Setup

2.1 Software Setup

This section provides the procedure for EVM software installation.

2.1.1 Software Installation

The EVM software is compatible with the Windows™ 7, 8, and 10 operating systems. The software is

available on the product folder, and can also be found in the GUI Composer Gallery. Search for BP-

DAC11001EVM in the GUI Composer Gallery. Use the down arrow symbol to download the software.

There are two downloads: BP-DAC11001EVM 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; 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-DAC11001EVM

software executable, as shown in Figure 1.

Figure 1. BP-DAC11001EVM Software Setup

When the BP-DAC11001EVM 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-DAC11001 EVM, as shown in Figure 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 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.

Figure 2. Software Installation Path

3 42

Remove

Jumper

Mount

Jumper

xxx

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System Setup

SLAU806–October 2019

BP-DAC11001EVM

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-DAC11001EVM.zip file, the firmware bin file is found at

<Download Directory>\BP-DAC11001EVM_1.0.1_installer_win\install_image_BP-DAC11001EVM\BP-

DAC11001EVM\firmware\acctrl.bin.

Follow the step-by-step procedure below 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-

DAC11001EVM_1.0.1_installer_win\install_image_BP-DAC11001EVM.\BP-

DAC11001EVM\firmware\acctrl.bin. Press Load Image followed by Verify Image.

System Setup

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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-DAC11001EVM. A PC runs the software that provides an interface

to the BP-DAC11001EVM through the launchpad.

The BP-DAC11001EVM requires 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

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System Setup

SLAU806–October 2019

BP-DAC11001EVM

2.2.1 Power Configurations and Jumper Settings

The BP-DAC11001EVM provides electrical connections to the device supply pins. The connectors and

optional configurations are shown in Table 4, and Table 5 shows the EVM jumper settings.

Table 4. BP-DAC11001EVM Power Supply Inputs

BP-DAC11001EVM Connector Supply Name Voltage Range Test Point

J12 VCC 5 V to 15 V TP21

J13 VSS –5 V to –15 V TP24

J14 VDD 4.5 V to 5.5 V TP25

J15 VIO 2.7 V to 5.5 V (Option: 3V3 on the launchpad) TP26

J17 GND 0 V TP27

J18 REF_PWR 5.3 V to 5.5 V TP33

J19 REFGND 0 V TP34

Table 5. BP-DAC11001EVM Jumper Settings

Jumper Description Default Position Alternative Position

J1 2x gain configuration None 1-2 or 2-3

J2 Output amplifier feedback configuration 1-2, 3-4: external resistor and

capacitor connection 5-6, 7-8: embedded resistor connection

J4 LDAC pull-down None 1-2: LDAC tied low

J5 CLR pull-down None 1-2: CLR tied low

J7 DAC output to load circuit connection None 1-2: DAC output to auxiliary circuit; 2-3: DAC

output to filter input

J8 AGND-OUT to FILTGND connection None 1-2: AGND-OUT and FILTGND shorted

J11 DVDD connection 2-3: DVDD from AEVM_5V0 1-2: DVDD from VDD

J16 IOVDD connection 2-3: IOVDD from AEVM_3V3 1-2: IOVDD from VIO

J20 REF_PWR connection 2-3: REF_PWR from J18 1-2: REF_PWR from VCC. Make sure VCC

is < 6 V before using this option.

J25 Reference filter bypass None 1-2: Bypass reference filter

J26 Reference source selection 2-3: Onboard reference 1-2: External reference (3 V to 10 V)

J30 REFGND connection 2-3: Through ground buffer 1-2: Do not use on the Rev A PCB

J31 Negative reference selection 2-3: Inverted reference source 1-2: Tied to ground (unipolar output mode)

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-DAC11001EVM and the launchpad can be connected as

shown in Figure 5. Connect the USB cable from the lauchpad OTG USB port (U7) to the PC.

2.2.3 Electrostatic Discharge Caution

Many of the components on the BP-DAC11001EVM 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.

DAC11001

FILTER

REF6250

EXTERNAL

REFERENCE

REFP

REFN

REF_PWR

REFGND

AGND

REF_VCC REF_VSS

AGND

DGND

OUT_VCC OUT_VSS

AGND-OUT

BUFFERED

DAC

OUTPUT

FILTGND

FILT_VCC FILT_VSS

FILTER 1

FILTER 2

AUXGND

VCC VSS VDD VIO

DGNDAGND

INTERFACE FOR

AUXILIARY

CIRCUIT

VREFP VREFN

VCCVSS

VDD

VIOREF_PWR

REFGND AGND

VCC VSS DVDD IOVDD

AVDD

EXTERNAL

LDAC

SPI

DGND

LAUNCHPAD

INTERFACE

AEVM_3V3

AEVM_5V0

VDD

IOVDD

VDD

DVDD

VDD DVDD

Detailed Description

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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

The block diagram of the BP-DAC11001EVM board is displayed in Figure 6. The dotted lines indicate

different power and ground domains. 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 REF6250, that generates a 5-V voltage reference, that in turn is converted to 5-V and –5-V reference

inputs for the DAC. There is an option for an external reference using connectors J27 and J28. Both J27

and J28 form a force-sense pair that eliminate cable losses while connected to external reference

sources. The DAC output is provided on J3. Jumper J2 provides various feedback options for the output

amplifier. The DAC output can be taken through two-stage, second-order filters using connectors J7 and

J8. There is an option to interface an external circuit using auxiliary connectors J23 and J24.

Figure 6. BP-DAC11001EVM Hardware Block Diagram

3v3

LD AC

SCL K

GND

CLR

Pin aligns with BoosterPack pinout standard

SYNC

SDO

SDIN

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Detailed Description

SLAU806–October 2019

BP-DAC11001EVM

3.1.2 Signal Definition for the Launchpad Interface

The BP-DAC11001EVM interfaces with the launchpad through connectors J9 and J10. The pin definitions

are shown in Figure 7.

Figure 7. Launchpad Interface Pinout

Detailed Description

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3.2 Software Description

This section describes the features of the BP-DAC11001EVM software, and discusses how to use these

features. The software provides basic control of all the registers and functions of the DAC11001 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-

DAC11001EVM icon, as shown in Figure 8.

Figure 8. BP-DAC11001EVM 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

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