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3 ADS1x15EVM Overview

Various onboard components are used to interface the analog input, digital interface, and provide power to the
ADS1x15 device. The

functional block diagram

shows an ADS1x15V2EVM-PDK board overview.

3.1 ADS1x15EVM-to-PAMBoard Interface

The ADS1x15EVM supports the digital I

C and functional modes as detailed in the

ADS1115 data sheet

(or the

ADS1015 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 ADS1x15.

Digital interface connections to the PAMBoard include power, I

C, and a GPIO connection used for triggering an

alert at the end of conversion if enabled. 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. ADS1x15EVM-to-PAMBoard Connections

Table 3-1. ADS1x1EVM Header Pinout and Description

Description

Connector

Description

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

—

ALERT/RDY

J4:31

J2:11

—

ADS1x15EVM Overview

www.ti.com

ADS1x15V2EVM-PDK User's Guide

SBAU362 – MARCH 2021

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Содержание ADS1x15V2EVM-PDK

Страница 1: ...1x15 device 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 platform eases the evaluation of the ADS1x15 device with hardwar...

Страница 2: ...er J6 9 Figure 3 4 LED Indicators D1 and D5 11 Figure 3 5 ADS1x15 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 ADS1x15V2EVM PDK Connected GUI ADS1115 shown 14 Figure 5 4 File Menu 15 Figure 5 5 Analysis Data Options 16 Figure 5 6 Register Data Options 16 Figure 5 7 Opt...

Страница 3: ...nd Description 8 Table 3 2 Terminal Block Input J5 9 Table 3 3 Terminal Block Input J6 9 Table 6 1 Bill of Materials 30 Trademarks Firefox is a trademark of Mozilla Foundation Chrome is a trademark of Google LLC All trademarks are the property of their respective owners www ti com Trademarks SBAU362 MARCH 2021 Submit Document Feedback ADS1x15V2EVM PDK User s Guide 3 Copyright 2021 Texas Instrument...

Страница 4: ...used the EVM plug in module format allows for an alternative external host to communicate with the ADS1x15 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 ADS1x15EVM and PAMBoard make up the ADS1x15V2EVM PDK and incorporates the following features ADS1x15 four input channel ADC with header or sc...

Страница 5: ...g at JP1 2 Connect an input voltage to AIN0 The PAMBoard supply voltage can be used as a voltage source to the ADS1x15 Use the 3 3 V source found at header J1 pin 1 and with a wire jumper connected to the J6 header at pin 1 A0 ADS1115V2EVM PDK Figure 2 1 Hardware Setup 2 2 Step 2 USB Connection and GUI Startup The ADS1x15V2EVM PDK GUI software can be run from a browser window Additional software m...

Страница 6: ... Capture Setting MUX 2 Select 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 t...

Страница 7: ...pears in the chart window when the collection completes Figure 2 4 Data Capture www ti com Quick Start SBAU362 MARCH 2021 Submit Document Feedback ADS1x15V2EVM PDK User s Guide 7 Copyright 2021 Texas Instruments Incorporated ...

Страница 8: ...sed for triggering an alert at the end of conversion if enabled 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 ADS1x15EVM to PAMBoard Connections Table 3 1 ADS1x1EVM Header Pinout and Description Description Connector Connector Description Description Connector Connector Description 3 3 V J1 1 J3 ...

Страница 9: ...ut 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 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 An...

Страница 10: ...mbination of AIN1 and AIN2 is possible by adding a 47 nF capacitor at C6 see location in Figure 6 5 CAUTION The configuration options for the ADS1x15 allow for a potential full scale range FSR greater than the supply This increased range 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 ab...

Страница 11: ... USB cable is plugged into the PC two LEDs will light on the PAMBoard Figure 3 4 The bottom LED D5 indicates that the 5 V output is active The top LED D1 indicates that the ADS1x15V2EVM PDK is ready to communicate with the GUI Figure 3 4 LED Indicators D1 and D5 Jumper JP1 selects the operating voltage for the ADS1x15 Figure 3 5 When jumper JP1 is in the bottom position the VDD to the ADS1x15 is s...

Страница 12: ...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 ADS1115V2EVM PDK or ADS1015V2EVM 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 exte...

Страница 13: ...File Options Tools Help Figure 5 1 Menu Bar Options The upper corner of the GUI as highlighted in the green box in Figure 5 2 shows vertical tabs available to navigate through the various GUI displays The vertical tabs starting at the top icon include Home Chart Configuration www ti com ADS1x15V2EVM PDK GUI SBAU362 MARCH 2021 Submit Document Feedback ADS1x15V2EVM PDK User s Guide 13 Copyright 2021...

Страница 14: ...c 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 shows both the black ribbon information and the device connected radial button in green boxes Figure 5 3 ADS1x15V2EVM PDK Connected GUI ADS1115 shown ADS1x15V2EVM PDK GUI www ti com 14 ADS1x15V2EVM PDK User s Guid...

Страница 15: ...ecessary 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 as illustrated in Figure 5 5 is saved to a comma separated values CSV formatted file for further analysis using external programs The data can also be loaded back...

Страница 16: ...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 ADS1x15V2EVM PDK GUI www ti com 16 ADS1x15V2EVM PDK User s Guide SBAU362 MARCH 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Страница 17: ...ormation displays the current COM port settings in a pop up dialog Figure 5 8 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 www ti com ADS1x15V2EVM PDK GUI SBAU362 MARCH 2021 Submit Document Feedback ADS1x15V2EVM PDK User s Guide 17 Copyright 2021 Texas Instruments Incorporated ...

Страница 18: ...tivity 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 ADS1x15V2EVM PDK GUI www ti com 18 ADS1x15V2EVM PDK User s Guide SBAU362 MARCH 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Страница 19: ...y included in this guide About displays specific information regarding the GUI and EVM hardware Figure 5 11 Help Menu As shown in Figure 5 12 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 www ti com ADS1x15V2EVM PDK GUI SBAU362 MARCH 2021 Submit Document Feedback ADS1x15V2EVM PDK User s G...

Страница 20: ... to the PC and the COM port used The status ribbon displays regardless of the navigation page selected 5 2 2 Chart The Chart icon selects the available charting options for displaying conversion data The data options include a Time Domain Histogram and FFT displays The Chart tab allows configuration of the Data Capture for the ADS1x15 At the upper right of the capture window as illustrated in Figu...

Страница 21: ...he chart window is a slide out menu where configuration settings are displayed and changes can be made for data collection 5 2 2 1 Channel Statistics When data collection completes statistical information displays along with the charted data The statistical display for Time Domain and Histogram are the same but the FFT statistics differ Because the ADS1x15 is primarily a DC measurement device the ...

Страница 22: ... Fundamental power Noise floor SNR or signal to noise ratio SFDR or spurious free dynamic range THD or total harmonic distortion SINAD or signal to noise and distortion ENOB or effective number of bits Harmonics ADS1x15V2EVM PDK GUI www ti com 22 ADS1x15V2EVM PDK User s Guide SBAU362 MARCH 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Страница 23: ...to the charting icons near the right side of the GUI below the statistics Figure 5 17 Time Domain Plot 5 2 2 3 Histogram Plot The Histogram plot Figure 5 18 shows the number of occurrences a code or group of codes appear User selection includes a choice of of Bins selecting the number of bins to include in the plot www ti com ADS1x15V2EVM PDK GUI SBAU362 MARCH 2021 Submit Document Feedback ADS1x15...

Страница 24: ...ight side of the GUI below the statistics 5 2 2 4 FFT Plot The FFT plot as shown in Figure 5 19 is rather meaningless for dc input voltages However a low frequency AC signal can be analyzed and the FFT plot displayed Figure 5 19 FFT Plot ADS1x15V2EVM PDK GUI www ti com 24 ADS1x15V2EVM PDK User s Guide SBAU362 MARCH 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Страница 25: ...st conversion data from the ADS1x15 The Conversion register contains the value of the last 16 bit conversion result read from the ADS1115 For the ADS1015 the conversion data are 12 bit left justified in the 16 bit register Because the ADS1x15 is a programmable device the Config LoThresh and HiThresh registers are programmable and 16 bits in length A number of control buttons and drop down menus ex...

Страница 26: ...h the Config register The Register Map data are specific to the GUI and firmware combination for the ADS1x15EVM Configuration of the ADS1x15 device is accomplished using the drop down menu and click options shown in the Field View on the right side of the GUI window The various bits can also be double clicked to toggle the bit settings As the bit settings change the Field View options also change ...

Страница 27: ...ters using the READ REGISTER and READ ALL REGISTERS buttons The READ REGISTER button reads only the selected register The READ ALL REGISTERS button reads all registers available for the ADS1x15 device The advantage of manually reading the register contents is a reduction in USB communication between the ADS1x15EVM and the GUI The registers can be read automatically from the ADS1x15 at a variety of...

Страница 28: ...he ADS1x15 If the write register drop down menu selection is for a Deferred Write then the write register buttons WRITE REGISTER and WRITE ALL REGISTERS become enabled Similar to the functionality of the read register buttons the WRITE REGISTER button will write the configuration for the currently selected register When selecting the WRITE ALL REGISTERS button all configurable registers will be wr...

Страница 29: ...e connection status also displayed as text The icon shows as a connected link when the EVM and GUI are connected and appears as a broken link when not connected Clicking on the icon will attempt to connect if disconnected and will disconnect if the EVM is currently connected The last icon shows as an arrow and clicking the icon toggles the display of connection details Figure 5 26 Status Informati...

Страница 30: ...R2 R3 R4 4 RES 499 1 0 1 W 0603 RC0603FR 07499RL Yageo R5 R7 R10 R13 4 RES 10 k 5 0 1 W AEC Q200 Grade 0 0402 ERJ 2GEJ103X Panasonic R8 R9 R11 R12 4 RES 4 70 k 1 0 1 W 0402 ERJ 2RKF4701X Panasonic R14 1 RES 0 1 0 1 W AEC Q200 Grade 0 0603 RMCF0603ZT0R00 Stackpole Electronics Inc SH J1 1 Shunt 100mil Gold plated Black SNT 100 BK G Samtec TP1 TP2 TP3 3 Test Point Multipurpose Black TH 5011 Keystone ...

Страница 31: ... 4 depict the ADS1x15EVM PCB layout Figure 6 1 Top Silkscreen www ti com Bill of Materials Printed Circuit Board Layout and Schematics SBAU362 MARCH 2021 Submit Document Feedback ADS1x15V2EVM PDK User s Guide 31 Copyright 2021 Texas Instruments Incorporated ...

Страница 32: ...6 2 Top Layer Bill of Materials Printed Circuit Board Layout and Schematics www ti com 32 ADS1x15V2EVM PDK User s Guide SBAU362 MARCH 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Страница 33: ...3 Bottom Layer www ti com Bill of Materials Printed Circuit Board Layout and Schematics SBAU362 MARCH 2021 Submit Document Feedback ADS1x15V2EVM PDK User s Guide 33 Copyright 2021 Texas Instruments Incorporated ...

Страница 34: ...Bottom Silkscreen Bill of Materials Printed Circuit Board Layout and Schematics www ti com 34 ADS1x15V2EVM PDK User s Guide SBAU362 MARCH 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Страница 35: ...hematic Figure 6 5 ADS1x15EVM Schematic ADS1115EVM Only www ti com Bill of Materials Printed Circuit Board Layout and Schematics SBAU362 MARCH 2021 Submit Document Feedback ADS1x15V2EVM PDK User s Guide 35 Copyright 2021 Texas Instruments Incorporated ...

Страница 36: ...s are subject to change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of these resources is prohibited No license is granted to any other TI intellectual property right or to any third party intellectual property right TI disclaims responsibility for and you wi...

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