Texas Instruments TLA2024EVM-PDK User manual

User’s Guide
TLA2024EVM-PDK User's Guide
ABSTRACT
The TLA2024EVM-PDK is comprised of the TLA2024 Evaluation Module (EVM) and the PAMBoard
motherboard. The combination of the EVM and PAMBoard allows users to evaluate the functionality of the Texas
Instruments 12-bit TLA2024 device. The TLA2024 is an ultra-small, low-power analog-to-digital converter (ADC).
The TLA2024 has inputs that can be configured as four single-ended or two differential inputs. This document
describes both the EVM hardware platform and the graphical user interface (GUI) software used to configure
and operate the device. The user’s guide also includes the EVM schematic diagram, board layout, and bill of
materials. The EVM-PDK platform eases the evaluation of the TLA2024 device with hardware, software, and
computer connectivity through the universal serial bus (USB) interface.
TLA2024 Evaluation Module
Related Documentation
Device Literature Number
TLA2024 SBAS846
TCA9406 SCPS221
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TLA2024EVM-PDK User's Guide 1
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Table of Contents
1 Introduction.............................................................................................................................................................................4
2 Quick Start...............................................................................................................................................................................5
2.1 Step 1 - Hardware Setup....................................................................................................................................................5
2.2 Step 2 - USB Connection and GUI Startup........................................................................................................................ 5
2.3 Step 3 - Configuration and Data Collection........................................................................................................................6
3 TLA2024EVM-PDK Overview................................................................................................................................................. 8
3.1 TLA2024EVM-to-PAMBoard Interface............................................................................................................................... 8
3.2 Digital Interface.................................................................................................................................................................. 9
3.3 Analog Input Connections.................................................................................................................................................. 9
3.4 Power-Supply Options......................................................................................................................................................11
4 TLA2024EVM-PDK Setup and Operation............................................................................................................................12
4.1 EVM Plug-in Instructions..................................................................................................................................................12
4.2 TLA2024EVM-PDK GUI and TI Cloud Agent Installation.................................................................................................12
5 TLA2024EVM-PDK GUI.........................................................................................................................................................13
5.1 Menu Bar..........................................................................................................................................................................15
5.2 Navigation Bar..................................................................................................................................................................21
5.3 Connection Status............................................................................................................................................................32
6 Bill of Materials, Printed Circuit Board Layout, and Schematics.....................................................................................33
6.1 Bill of Materials.................................................................................................................................................................33
6.2 Printed Circuit Board Layout............................................................................................................................................ 34
6.3 Schematics.......................................................................................................................................................................36
List of Figures
Figure 1-1. TLA2024EVM-PDK Functional Block Diagram......................................................................................................... 4
Figure 2-1. Hardware Setup........................................................................................................................................................ 5
Figure 2-2. Capture Setting – MUX............................................................................................................................................. 6
Figure 2-3. Capture Setting – Full-Scale Range (FSR)............................................................................................................... 6
Figure 2-4. Data Capture............................................................................................................................................................. 7
Figure 3-1. TLA2024EVM-to-PAMBoard Connections.................................................................................................................8
Figure 3-2. Analog Input Terminal Block (J5)...............................................................................................................................9
Figure 3-3. Analog Input Header (J6)........................................................................................................................................ 10
Figure 3-4. LED Indicators D1 and D5.......................................................................................................................................11
Figure 3-5. TLA2024 Supply Setting Jumper (JP1)................................................................................................................... 11
Figure 4-1. Browser Extension and TI Cloud Agent Installation................................................................................................ 12
Figure 5-1. Menu Bar Options................................................................................................................................................... 13
Figure 5-2. GUI Navigation Bar Options.................................................................................................................................... 14
Figure 5-3. TLA2024 EVM Connected GUI............................................................................................................................... 14
Figure 5-4. File Menu.................................................................................................................................................................15
Figure 5-5. Analysis Data Options............................................................................................................................................. 16
Figure 5-6. Register Data Options............................................................................................................................................. 16
Figure 5-7. Options Menu.......................................................................................................................................................... 17
Figure 5-8. Serial Port Configuration Settings........................................................................................................................... 17
Figure 5-9. Tools Menu.............................................................................................................................................................. 18
Figure 5-10. Logs Display..........................................................................................................................................................18
Figure 5-11. Help Menu............................................................................................................................................................. 19
Figure 5-12. Help Information (About)....................................................................................................................................... 20
Figure 5-13. Connected Hardware Information......................................................................................................................... 21
Figure 5-14. Data Capture Window........................................................................................................................................... 22
Figure 5-15. Capture Statistics.................................................................................................................................................. 23
Figure 5-16. FFT Statistics.........................................................................................................................................................24
Figure 5-17. Time Domain Plot..................................................................................................................................................24
Figure 5-18. Histogram Plot.......................................................................................................................................................25
Figure 5-19. FFT Plot.................................................................................................................................................................26
Figure 5-20. Capture Settings....................................................................................................................................................27
Figure 5-21. Register Map......................................................................................................................................................... 28
Figure 5-22. TLA2024 Configuration......................................................................................................................................... 28
Figure 5-23. Register Read and Write Controls.........................................................................................................................29
Figure 5-24. Auto Read Options................................................................................................................................................ 30
Figure 5-25. Register Write Options.......................................................................................................................................... 31
Figure 5-26. Status Information................................................................................................................................................. 32
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Figure 6-1. Top Silkscreen......................................................................................................................................................... 34
Figure 6-2. Top Layer.................................................................................................................................................................34
Figure 6-3. Bottom Layer........................................................................................................................................................... 35
Figure 6-4. Bottom Silkscreen................................................................................................................................................... 35
Figure 6-5. TLA2024EVM-PDK Schematic................................................................................................................................36
List of Tables
Table 3-1. TLA2024EVM-PDK Header Pinout and Description................................................................................................... 8
Table 3-2. Terminal Block Input (J5)............................................................................................................................................ 9
Table 3-3. Terminal Block Input (J6)............................................................................................................................................ 9
Table 6-1. Bill of Materials..........................................................................................................................................................33
Trademarks
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All trademarks are the property of their respective owners.
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TLA2024EVM-PDK User's Guide 3
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1 Introduction
The TLA2024EVM-PDK is a fully-assembled evaluation platform designed to highlight the TLA2024 features and
modes of operation that make this device suitable for low-power applications. The EVM sits on top of an
accompanying Precision ADC Motherboard (PAMBoard) used as a USB-to-PC GUI communication bridge. The
board combination also serves as an example implementation of connecting a microcontroller (MCU) to
communicate with the TLA2024 device through an Inter-Integrated Circut interface (I2C).
Note
The TLA2024 EVM requires an external controller to evaluate the TLA2024 device.
The PAMBoard is controlled by commands received from the TLA2024EVM-PDK GUI, and returns data to the
GUI for display and analysis. If the PAMBoard is not used, the EVM plug-in module format allows for an
alternative external host to communicate with the TLA2024 by connection through the pin headers J1 through
J4. Connections to the header are identified on the PCB silkscreen and listed in Table 3-1.
The combined TLA2024EVM and PAMBoard make up the TLA2024EVM-PDK and incorporates the following
features:
• TLA2024, four input-channel ADC with header or screw terminal block input connections
• Voltage selection of 3.3 V or 5 V operation for the TLA2024 with level-shifting to the 3.3-V MCU
• Full-scale ranges from 256 mV to 6.144 V
• I2C for communication and configuration
Analog header and
terminal block
Analog inputs + RC
filters ADC
I2C/GPIO Level
shifter
VDD 3.3 V
PAMBoard
digital
interface
EEPROM
device ID
3.3 V
Analog power
source
3.3 V
5 V
PAMBoard
power
VDD
I2C
Figure 1-1. TLA2024EVM-PDK Functional Block Diagram
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2 Quick Start
The quick start shows a minimalist startup process to get the GUI working with the EVM and to see a simple
example for data collection. Details on each step are found elsewhere within the user's guide. Specifics
regarding the GUI installation steps are found in Section 4.2.
2.1 Step 1 - Hardware Setup
The EVM hardware configuration consists of verifying the supply settings and adding a source voltage to be
converted.
1. Verify that the TLA2024 supply voltage is set to the 5-V setting at JP1.
2. Connect an input voltage to AIN0. The PAMBoard supply voltage can be used as a voltage source to the
TLA2024. Use the 3.3-V source found at header J1 pin 1 and with a wire jumper connect to the J6 header at
pin 1 (A0).
Figure 2-1. Hardware Setup
2.2 Step 2 - USB Connection and GUI Startup
The TLA2024EVM GUI software can be run from a browser window. Additional software may need to be
installed if not installed previously. See Section 4.2 for additional details. Once the GUI has started, plug the
TLA2024VM-PDK into an available USB port on the PC.
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2.3 Step 3 - Configuration and Data Collection
Once the GUI has recognized the EVM, go to the chart window as identified in Figure 2-2.
1. Open the slide-out configuation from the right side of the GUI and Show Capture Settings. Select the MUX
input for AINP = AIN0 and AINN = GND from the Select MUX Channels drop-down menu selection.
Figure 2-2. Capture Setting – MUX
2. Select the FSR = ±4.096V from the Select FSR drop-down menu as shown in Figure 2-3. The selection is
needed to increase the full-scale range to measure the 3.3-V input.
Figure 2-3. Capture Setting – Full-Scale Range (FSR)
3. Close the slide-out configuration window by selecting Hide Capture Settings.
4. Choose Volts from the chart window for the Y-axis drop-down menu. See Figure 2-4.
5. Press the COLLECT DATA button to capture the data.
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6. The collected data appears in the chart window once the collection completes.
Figure 2-4. Data Capture
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3 TLA2024EVM-PDK Overview
Various onboard components are used to interface the analog input, digital interface, and provide power to the
TLA2024 device. The functional block diagram shows a TLA2024EVM-PDK board overview.
3.1 TLA2024EVM-to-PAMBoard Interface
The TLA2024 supports the digital I2C and functional modes as detailed in the TLA2024 Ultra-Small, 12-Bit
Analog-to-Digital Data Sheet. The PAMBoard operates at a 3.3-V logic level and the digital I/O lines of the ADC
are level shifted to match the operating voltage of the TLA2024.
Digital interface connections to the PAMBoard include power and I2C for communication. The digital connections
are highlighted in the silkscreen as shown in Figure 3-1. Details regarding the connections are shown in Table
3-1.
Figure 3-1. TLA2024EVM-to-PAMBoard Connections
Table 3-1. TLA2024EVM-PDK Header Pinout and Description
Description Connector Connector Description Description Connector Connector Description
+3.3 V J1:1 J3:21 +5 V J4:40 J2:20 GND
J1:2 J3:22 GND J4:39 J2:19
J1:3 J3:23 J4:38 J2:18
J1:4 J3:24 J4:37 J2:17
J1:5 J3:25 J4:36 J2:16
J1:6 J3:26 J4:35 J2:15
J1:7 J3:27 J4:34 J2:14
J1:8 J3:28 J4:33 J2:13
I2C SCL J1:9 J3:29 J4:32 J2:12
I2C SDA J1:10 J3:30 N/A J4:31 J2:11
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3.2 Digital Interface
As noted in TLA2024EVM-to-PAMBoard Interface, the TLA2024 interfaces with the PAMBoard. The PAMBoard
communicates with the computer over USB. The two devices on the EVM requiring communication are the
TLA2024 ADC (U1) and the electrically-erasable programmable read-only memory (EEPROM) (U3) using I2C
(see Figure 6-5). The EEPROM is preprogrammed with the information required to configure and initialize the
TLA2024EVM-PDK GUI software platform. Once the hardware is initialized through the software, the EEPROM
is no longer used.
The PAMBoard and EEPROM (U3) use 3.3 V for the device interface logic levels. The TLA2024 can operate at
either 3.3 V or 5 V as desired by jumper selection JP1. To allow the TLA2024 to operate at 5-V logic levels, a
logic level translator (U2) is used.
3.3 Analog Input Connections
The TLA2024 device is designed for easy interface to an external sensor that is differential or single-ended using
either a header (J6) or a screw terminal block (J5). Connector J6 provides an easy interface connection for
differential input pairs with each pair separated by analog ground. Table 3-2 lists the channel input connections
for J5 and Table 3-3 shows the input connections for J6. Both connectors are clearly labeled on the PCB
silkscreen for easy input connection identification.
Connector J5 is a screw terminal block for attaching an external sensor with bare wire connections. The terminal
block includes all four inputs and a connection point for analog ground. See Figure 3-2 for the input layout.
Table 3-2. Terminal Block Input (J5)
J5 Terminal Block Inputs Description
J5:1 Analog input for AIN0 of the ADC
J5:2 Analog input for AIN1 of the ADC
J5:3 Analog input for AIN2 of the ADC
J5:4 Analog input for AIN3 of the ADC
J5:5 Analog Ground
Figure 3-2. Analog Input Terminal Block (J5)
Connector J6 is a 100-mil spaced dual-row header. Jumper wire or clip leads can be used for connections. The
header includes all four inputs and two analog ground connections. See Figure 3-3 for the input layout.
Table 3-3. Terminal Block Input (J6)
J6 Terminal Block Inputs Description
J6:1 Analog input for AIN0 of the ADC
J6:2 Analog input for AIN1 of the ADC
J6:3 and J6:4 Analog Ground
J6:5 Analog input for AIN2 of the ADC
J6:6 Analog input for AIN3 of the ADC
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Figure 3-3. Analog Input Header (J6)
Each analog input includes a single-order low-pass filter. The single-ended input filter cutoff frequency is 67.9
kHz. Up to four separate single-ended measurements are possible.
Instead of single-ended measurements, up to two differential input pair combinations are possible. The filter
design for the differential input pair filtering has a cutoff frequency of 3.4 kHz. The filter is populated on the
TLA2024EVM-PDK for input pair combinations of AIN0 and AIN1 or AIN2 and AIN3. The input combination of
AIN1 and AIN2 is possible by adding a 47-nF capacitor at C6 (see location in the schematic).
CAUTION
The configuration options for the TLA2024 allow for a potential full-scale range (FSR) greater than
the supply. This is useful when an input voltage slightly exceeds the next lower FSR. However, the
input voltage should not exceed the range of the VDD supply selected at JP1. The absolute input
voltage is bounded by VDD + 0.3 V and GND – 0.3 V. Damage to the TLA2024 may occur if the
absolute input range is exceeded.
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3.4 Power-Supply Options
The TLA2024 supports a wide range of supply voltage from 2 V to 5.5 V. The TLA2024EVM ADC voltage (VDD)
can operate from either 3.3 V or 5 V. The power is supplied from the USB 5-V source to the PAMBoard.
However, the USB power supply voltage is not consistent from PC to PC. A DC/DC converter increases the USB
output to 5.5 V. A linear low drop out (LDO) regulator uses the 5.5 V to establish a clean and stable 5 V and 3.3
V for the TLA2024EVM-PDK.
When the USB cable is plugged into the PC, two LEDs will light on the PAMBoard (see Figure 3-4). The bottom
LED (D5) indicates that the 5-V output is active. The top LED (D1) indicates that the TLA2024EVM-PDK is ready
to communicate with the GUI.
Figure 3-4. LED Indicators D1 and D5
Jumper JP1 selects the operating voltage for the TLA2024 (see Figure 3-5). When jumper JP1 is in the bottom
position, the VDD to the TLA2024 is set to 5-V and when in the top position, the VDD supply is set 3.3-V.
Figure 3-5. TLA2024 Supply Setting Jumper (JP1)
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4 TLA2024EVM-PDK Setup and Operation
The TLA2024EVM-PDK requires a communication driver and GUI software for device configuration and data
collection. Driver installation is automatic. The USB enumerates as a composite device for Communications
Device Class (CDC) and Bulk. The sending of commands is through CDC while data collection is by Bulk
transfers from the PAMBoard. Additional information regarding any driver issues is located within this FAQ.
4.1 EVM Plug-in Instructions
Install jumper JP1 to the desired TLA2024 operating voltage. Connect the USB micro cable to the PAMBoard
and attach the other end of the cable to an available USB port on the PC.
4.2 TLA2024EVM-PDK GUI and TI Cloud Agent Installation
The following steps describe the TLA2024EVM GUI software installation:
1. Verify that the micro USB to USB cable from the PAMBoard to a USB port on the computer is connected.
2. On the EVM landing page (TLA2024EVM-PDK), the software is available through a web-based GUI.
Connecting to the GUI may require a login to a user account for access (Software GUI).
3. First-time users may be prompted to download and install the browser extension for Firefox™ or Chrome™
and the TI Cloud Agent Application as shown in Figure 4-1. Installing the TI Cloud Agent is a one time
download and installation.
4. Refresh the GUI. The GUI should connect to the hardware. A green signal displays, and the Hardware
Connected indication shows on the bottom (see Figure 5-3).
Figure 4-1. Browser Extension and TI Cloud Agent Installation
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5 TLA2024EVM-PDK GUI
The Home page is the GUI start-up landing page. The Home page provides a high-level overview of the
TLA2024 device. The horizontal menu bar at the top of the GUI shows the menu options:
• File
• Options
• Tools
• Help
Figure 5-1. Menu Bar Options
The upper corner of the GUI shows vertical tabs available to navigate through the various GUI displays. The
vertical tabs starting at the top icon include:
• Home
• Chart
• Configuration
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Figure 5-2. GUI Navigation Bar Options
The black ribbon at the bottom of the GUI shows connection status and log information. On GUI startup, the
software attempts to identify and verify that the EVM connected matches with the GUI. An EEPROM on the
TLA2024EVM-PDK contains information specific to the EVM connected. A properly connected and identified
EVM displays as Device Connected with a green indicator and at the bottom as Hardware Connected in the
status ribbon.
Figure 5-3. TLA2024 EVM Connected GUI
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5.1 Menu Bar
The Menu bar across the top of the GUI displays the device name used on the EVM along with a number of
drop-down menu options.
5.1.1 File Menu
The File drop-down menu displays available options. The options include:
• Program Device
• Analysis Data
– Save data
– Load data
• Register Data
– Save register settings
– Load register settings
Figure 5-4. File Menu
The Program Device option should only be necessary if an important firmware change is required. If
reprogramming the PAMBoard firmware becomes necessary, an additional pop-up box displays with information
on the programming procedure.
By using the Save data option the Analysis Data is saved to a comma-separated values (CSV) formatted file for
further analysis using external programs. The data can also be loaded back into the GUI for further review or
analysis by selecting Load data.
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Figure 5-5. Analysis Data Options
Register Data can be saved for a particular configuration by selecting Save register settings. A previously-saved
configuration can be loaded back into the GUI again when testing various device configurations by using Load
register settings.
Figure 5-6. Register Data Options
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5.1.2 Options Menu
The Options drop-down provides information regarding the serial COM port the GUI is using. By selecting Serial
Port, the serial COM port information displays the current COM port settings in a pop-up dialog with options to
change the COM port or reconfigure the settings as necessary.
Figure 5-7. Options Menu
Figure 5-8. Serial Port Configuration Settings
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5.1.3 Tools Menu
The Tools drop-down menu displays the Log pane option. The Log pane displays the activity information log at
the bottom of the GUI. The Log pane displays the same information as when clicking the book icon in the status
ribbon.
Figure 5-9. Tools Menu
Figure 5-10. Logs Display
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5.1.4 Help Menu
The Help drop-down menu displays the following:
•E2E Support Forum providing a link to the E2E forum for asking questions or searching the E2E forum.
•View README.md displays pertinent startup information not necessarily included in this guide.
•About displays specific information regarding the GUI and EVM hardware.
Figure 5-11. Help Menu
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Information specific to the GUI build and the connected hardware is found by selecting About from the drop-
down Help menu.
Figure 5-12. Help Information (About)
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