Texas Instruments ADS1x9xECG-FE User Manual

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ADS1x9xECG-FE Demonstration Kit

User's Guide

Literature Number: SLAU384A

December 2011–Revised April 2012

Contents

1 ADS1x9xECG-FE ................................................................................................................. 5

1.1 Important Disclaimer Notice ............................................................................................ 5

2 Overview ............................................................................................................................ 6

2.1 Introduction ............................................................................................................... 6

2.2 Features Supported in this Version ................................................................................... 6

3 Software Installation ............................................................................................................ 7

3.1 Minimum Requirements ................................................................................................ 7

3.2 Installing the Software (PC application) .............................................................................. 7

3.3 Installing the USB Drivers ............................................................................................ 12

4 Running the Software ........................................................................................................ 16

4.1 Overview of the Features ............................................................................................. 17

5 ADS1x9xECG-FE Hardware Introduction .............................................................................. 27

5.1 Power Supply ........................................................................................................... 27

5.2 Clock ..................................................................................................................... 28

5.3 Memory .................................................................................................................. 28

5.4 Accessing ADS1x9x Digital Signals ................................................................................. 28

5.5 GPIO Test Points ...................................................................................................... 28

5.6 Analog Inputs ........................................................................................................... 28

5.7 USB Interface ........................................................................................................... 29

5.8 Onboard Key Interface ................................................................................................ 29

5.9 Visual Indication ........................................................................................................ 30

6 Evaluation of ECG and Respiration Specific Functions .......................................................... 30

6.1 Evaluation Mode (Analysis Mode) ................................................................................... 31

6.2 Live Data Streaming Mode ........................................................................................... 32

7 USB-Based Firmware Upgrade ............................................................................................ 37

8 Connector Interface ........................................................................................................... 38

8.1 DB9 ECG Electrode Connector ...................................................................................... 39

8.2 USB Mini Connector ................................................................................................... 39

Appendix A ECG Cable Details .................................................................................................... 40

Appendix B ADS1x9x EVM Bill of Materials (BOM) ........................................................................ 41

Appendix C PCB Layout and Schematics ..................................................................................... 46

C.1 PCB Layout ............................................................................................................ 46

C.2 Schematics ............................................................................................................ 49

Table of Contents SLAU384A–December 2011–Revised April 2012

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1 ADS1x9xECG-FE Demonstration Kit..................................................................................... 6

2 PC Application Installation Screen 1 ..................................................................................... 8

3 PC Application Installation Screen 2 ..................................................................................... 8

4 PC Application Installation Screen 3 ..................................................................................... 9

5 PC Application Installation Screen 4 ..................................................................................... 9

6 PC Application Installation Screen 5.................................................................................... 10

7 PC Application Installation Screen 6.................................................................................... 10

8 PC Application Installation Screen 7.................................................................................... 11

9 PC Application Installation Screen 8.................................................................................... 11

10 PC Application Installation Screen 9.................................................................................... 12

11 PC Application Installation Screen 10 .................................................................................. 12

12 Hardware Wizard Screen 1 .............................................................................................. 13

13 Hardware Wizard Screen 2 .............................................................................................. 13

14 Hardware Wizard Screen 3 .............................................................................................. 14

15 Hardware Wizard Screen 4 .............................................................................................. 14

16 Hardware Wizard Screen 5 .............................................................................................. 15

17 Hardware Wizard Screen 6 .............................................................................................. 15

18 Device Manager Screen.................................................................................................. 16

19 EVM not connected Error Message..................................................................................... 16

20 Register Configuration - Channel Registers ........................................................................... 17

21 Register Configuration – LOFF and RLD............................................................................... 18

22 Register Configuration – GPIO .......................................................................................... 18

23 Register Configuration – Respiration Registers....................................................................... 19

24 Register Configuration – Register Map................................................................................. 19

25 PC Application Analysis – SCOPE...................................................................................... 20

26 PC Application Analysis - Histogram.................................................................................... 21

27 PC Application Analysis - FFT........................................................................................... 22

28 PC Application Analysis – ECG ......................................................................................... 23

29 PC Application Analysis – ADS1292R Respiration (Low Pass Filter Enabled) ................................... 23

30 PC Application Save ...................................................................................................... 24

31 PC Application Live ECG for ADS1292R............................................................................... 25

32 PC Application Live Respiration Channel.............................................................................. 26

33 Simulator Connection..................................................................................................... 29

34 Switch Positions ........................................................................................................... 30

35 Firmware Architecture..................................................................................................... 31

36 Evaluation Mode Data Flow for ADS1292R............................................................................ 32

37 Live Data Stream Mode Data Flow for ADS1292R ................................................................... 33

38 Frequency Response for the IIR Filter.................................................................................. 34

39 Frequency Response for the MBF Filter (Full View).................................................................. 34

40 Frequency Response for the MBF Filter (50Hz Notch)............................................................... 35

41 Frequency Response for the MBF Filter (Sharp cut off Around 150Hz) ........................................... 35

42 Frequency Response for the Band Pass Filter ........................................................................ 35

43 PC Application Firmware Upgrade - 1.................................................................................. 37

44 PC Application Firmware Upgrade - 2.................................................................................. 38

45 PC Application Firmware Upgrade - 3.................................................................................. 38

46 DB9 ECG Connector Pin Outs........................................................................................... 39

47 USB Mini Connector Pin Outs........................................................................................... 39

List of Figures

SLAU384A–December 2011–Revised April 2012 List of Figures

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48 ECG Cable Drawing....................................................................................................... 40

49 Top Layer Placement ..................................................................................................... 47

50 Bottom Layer Placement ................................................................................................. 48

List of Figures SLAU384A–December 2011–Revised April 2012

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This user's guide describes the characteristics, operation, and use of the ADS1x9xECG-FE. This demonstration kit models the ADS1192, ADS1292 and ADS1292R. The family of devices are two-channel, 16/24-bit, low-power, integrated analog front-end (AFE) designed for portable electrocardiogram (ECG) and respiration applications. The ADS1x9xECG-FE is intended for prototyping and evaluation. This user's guide includes a complete circuit description, schematic diagram, and Bill of Materials.

1 ADS1x9xECG-FE

1.1 Important Disclaimer Notice

NOTICE: The ADS1x9x demonstration kits are intended for feasibility and evaluation testing only in laboratory and development environments. This product is not for diagnostic use. This product is not for use with a defibrillator:

• The ADS1x9xECG-FE to be used only under these conditions: – The ADS1x9xECG-FE demonstration kit must not be used for diagnostic purposes. – – The ADS1x9xECG-FE demonstration kit is intended solely for evaluation and development

purposes. It is not intended for use and may not be used as all or part of an end equipment product.

– The ADS1x9xECG-FE demonstration kit should be used solely by qualified engineers and

technicians who are familiar with the risks associated with handling electrical and mechanical components, systems and subsystems.

– You are responsible for the safety of you and your employees and contractors when using or

handling the ADS1x9x demonstration kit. Furthermore, you are fully responsible for the contact interface between the human body and electronics; consequently, you are responsible for preventing electrical hazards such as shock, electrostatic discharge, and electrical overstress of electric circuit components.

User's Guide

SLAU384A–December 2011–Revised April 2012

ADS1x9xECG-FE Demonstration Kit

Pentium, Celeron are trademarks of Intel Corporation. Windows is a registered trademark of Microsoft Corporation. All other trademarks are the property of their respective owners.

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Overview

2 Overview

2.1 Introduction

NOTE: From this point on, unless otherwise noted, ADS1x9x refers to ADS1192, ADS1292 and

ADS1292R based demonstration kits.

This user’s guide describes ADS1x9x software and hardware. The appendix contains the Bill of Materials and schematic design. The demonstration board shown in Figure 1 is provided to accomodate evaluation and system development activities related to ADS1x9x devices.

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Figure 1. ADS1x9xECG-FE Demonstration Kit

The hardware is designed so all of the following ECG front end devices can be evaluated:

1. ADS1292 – 2 channels at 24 bits

2. ADS1292R – 2 channel at 24 bit with respiration

3. ADS1291 – 1 channel at 24 bit

4. ADS1191 – 1 channel at 16 bit

5. ADS1192 – 2 channel at 16 bit

The board can be assembled with any of these chips. ADS1292, ADS1292R and ADS1192 demonstration kits are available. The MSP430 firmware and PC application are designed to automatically detect the installed part and configure to accommodate the part.

Throughout this document, the term demonstration kit is synonymous with the ADS1x9xECG-FE.

2.2 Features Supported in this Version

1. Four electrode ECG cable support

2. View six ECG Leads: Lead I, Lead II, Lead III, Lead aVR, Lead aVL, Lead aVF and respiration channel (ADS1292R only) .

3. Two modes of operation: Evaluation and Live ECG / Respiration

4. Acquire data at up to 8 kHz in Evaluation mode

5. Current based Lead off detection

6. USB based power and PC application connectivity

7. Access to all ADS1x9x registers via an easy to use GUI.

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8. Built-in time domain, histogram, FFT and ECG / Resp related analysis on the PC application

9. Live ECG with heart rate calculation.

10. Live Respiration wave with respiration rate calculation

11. USB based firmware upgrade option

12. MSP430 Firmware debugging using ez430 USB emulator

3 Software Installation

3.1 Minimum Requirements

Before installing the software, verify that your PC meets the minimum requirements outlined in this section

3.1.1 Required Setup for ADS1x9xECG-FE Demo Software

• IBM PC-compatible computer

• Pentium™ III/ Celeron™ 866 MHz or equivalent processor

• Minimum 256 MB of RAM (512 MB or greater recommended)

• Hard disk drive with at least 200 MB free space

• Microsoft Windows®XP SP2 operating system or Windows 7 operating system

• 1280 × 1024 or greater display screen resolution

3.1.2 Additional Requirements for use with Hardware

• ADS1x9xECG-FE Demonstration Kit

• USB to mini USB cable

• DB9 ECG Cable

Software Installation

3.2 Installing the Software (PC application)

Before installing the software, make sure the ADS1x9xECG-FE is NOT connected to the PC. If using a machine with Windows 7, we recommend having administrator rights to avoid problems during installation. Unzip the installer file, and then find and double click setup.exe to install the software. Unless otherwise specified during the install process, the software installs at C:\Program Files\Texas

Instruments\ADS1x9xEVM. It creates a program menu item ADS1x9xEVM under Programs → Texas Instruments → ADS1x9xevm to execute the software. The following steps ensure proper installation of the

PC application.

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Software Installation

Click on setup.exe and the following screen appears. Click “Next”

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Figure 2. PC Application Installation Screen 1

Accept the License Agreement and click “Next”.

Figure 3. PC Application Installation Screen 2

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Accept the License Agreement and click “Next”.

Software Installation

Figure 4. PC Application Installation Screen 3

The LabVIEW application software is installed now. Click “Next” to install the Microsoft C++ 2008 Redistributable Package (x86).

Figure 5. PC Application Installation Screen 4

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Software Installation

If your system already has the Microsoft C++ 2008 Redistributable Package (x86) installed, then the following screen appears. Click “Cancel” to proceed.

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Figure 6. PC Application Installation Screen 5

Click “Finish” to complete the installation procedure.

Figure 7. PC Application Installation Screen 6

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If your system does not have the Microsoft C++ 2008 Redistributable Package (x86) installed, then the following screen appears. Click “Next”.

Software Installation

Figure 8. PC Application Installation Screen 7

Accept the license terms and click “Install”.

Figure 9. PC Application Installation Screen 8

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Software Installation

Click “Finish” to complete the installation.

The following screen might appear for the first time installation. Restart the machine.

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Figure 10. PC Application Installation Screen 9

Figure 11. PC Application Installation Screen 10

The PC application is now ready to use.

3.3 Installing the USB Drivers

The communication interface between the ADS1x9xECG-FE board and PC is through USB using CDC profile. A onetime installation of the USB driver is required for the communication between ADS1x9xECGFE and PC application.

The following steps will ensure proper installation of the USB drivers.

1. Plug-in USB to mini USB cable to P1 of ADS1x9xECG-FE and the other end to the USB port on the PC.

2. The operating system will prompt for USB driver for the “ADS1x9x - ECG Recorder” device. When the wizard comes up, select the options “No, not this time” as shown in Figure 12. Click “Next”

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Select the option “Install from a list or specific locations (Advanced)” and click “Next”.

Software Installation

Figure 12. Hardware Wizard Screen 1

As shown in Figure 14 navigate to the directory in which “MSP430-CDC.inf” file is located (C:\Program

Files\Texas Instruments\ADS1x9xevm\USB Drivers). This file will be copied to the directory while installing

the PC application.

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Figure 13. Hardware Wizard Screen 2

Software Installation

Click “Next”

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Figure 14. Hardware Wizard Screen 3

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Figure 15. Hardware Wizard Screen 4

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For the following warning message click on “Continue Anyway”

Click on Finish

Software Installation

Figure 16. Hardware Wizard Screen 5

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Figure 17. Hardware Wizard Screen 6

Running the Software

The ADS1x9xECG-FE now will get recognized as Virtual COM port under Device Manager as shown in

Figure 18.

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Figure 18. Device Manager Screen

The USB driver installation is now complete and ADS1x9xEVM is now ready to use.

4 Running the Software

From the Start menu, select Programs>Texas Instruments>ADS1x9xevm to run the ADS1x9xEVM software. Unless the hardware has been disconnected, the user will observe messages that confirm that the connection has been established and the program will wait in idle mode for user input.

If the connection to the ADS1x9xECG-FE board is not established, then the program will prompt the user to check the connection between the PC and ADS1x9xECG-FE and retry.

Figure 19. EVM not connected Error Message

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4.1 Overview of the Features

This section provides a quick overview of the various features and functions of the ADS1x9xECG-FE software package.

The main tabs consist of:

• About

• ADC Register - Allows the user to configure all the ADS1x9x user registers

• Analysis - Allows the user to view and analyze the raw data

• Save - Allows the user to write data samples and analysis results to a file

• Live ECG\RESP Display - Provides streaming ECG signals along with heart rate, lead off information and respiration

4.1.1 ADC Registers Tab

The ADC register tab allows the user to configure the various registers of the ADS1x9x. Please see the ADS1x9x datasheet for register details of the chip.

NOTE: The ADS1x9xECG-FE GUI only supports Continuous Conversion Mode. Single Shot Mode is

not supported.

Running the Software

Figure 20. Register Configuration - Channel Registers

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Running the Software

The LOFF and RLD tab consists of the settings to enable lead-off, selecting the channels for lead-off detection and deriving the Right Leg Drive signal. General options including clocking are also available on this tab.

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Figure 21. Register Configuration – LOFF and RLD

The GPIO Registers tab consists of the GPIO settings.

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Figure 22. Register Configuration – GPIO

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The Respiration Registers tab consists of the settings needed for respiration and RLD reference signals. The respiration controls are specific to the ADS1292R, they are not applicable for the ADS1192 and ADS1292.

Running the Software

Figure 23. Register Configuration – Respiration Registers

The Registers Map tab reads back the register bit values from the ADS1x9xECG-FE. The Refresh Registers button provided in this tab read back the register values from the ADS1x9xECG-FE at any time.

Figure 24. Register Configuration – Register Map

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Running the Software

4.1.2 Analysis Tab

The Analysis tab consists of various analysis routines and displays. The following sub-tabs are available for the Analysis tab

• Scope

• Histogram

• FFT

• ECG\Resp Display

The data is acquired from the EVM by clicking ACQUIRE button. The number of samples (block size) to be acquired must be given in the space provided. The CONTINUOUS button acquires the data from the EVM continuously in the designated block size.

Scope Sub-Tab

The Scope sub-tab displays the data in the time-domain. The units are converted from codes to volts using the voltage reference value set in the ADC Registers tab and are plotted as either input referred (output divided by PGA gain setting) or non-input referred using the checkbox located in the top right corner of the GUI. The Scope Analysis button activates a pop-up that displays the mean voltage, root mean square (RMS) voltage and peak to peak voltage for noise analysis.

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Figure 25. PC Application Analysis – SCOPE

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The following main buttons/controls are available in this sub-tab

Histogram Sub-Tab

The Histogram sub-tab displays the data in a histogram format for the two channels. The data is arranged in the total number of histogram bins set within the tab following acquisition. The Histogram Analysis button can be used to view the mean voltage, root mean square (RMS) voltage and peak to peak voltage for analysis.

Running the Software

Button/Control Description

Scope Analysis Displays the mean, root mean square (RMS), and peak-to-peak for noise analysis of the acquired data Plot Channel selection button allow selecting All channels, Channel 1, or Channel 2 for display

Figure 26. PC Application Analysis - Histogram

The following buttons/controls are available in this sub-tab

Button/Control Description

Histogram Analysis Runs histogram of the selected channel(s) for the selected number of samples Plot Channel selection button allow selecting all channels or Channel 1 or Channel 2 for the display Histogram Bins Set the total number of bins to arrange the individual channels Display Plane(Right click on Various display planes can be selected for the histogram display. The options available are:

the display area and then select “Optional Plane” menu item)

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• Nyquist

• Nichols

• S Plane

• Z Plane

Running the Software

FFT Sub-Tab

The FFT sub-tab displays the data in the frequency domain by performing a FFT on the two channels. Details of the FFT, including SNR, THD, etc. can be viewed using the FFT Analysis button located in the bottom left corner of the display.

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Figure 27. PC Application Analysis - FFT

Button / Control Description

FFT Analysis Runs FFT analysis of the selected channel(s) and result will be shown on the pop-up window Plot Channel selection button allow selecting All channels, Channel 1, or Channel 2 for display AC Analysis Parameters Various AC analysis parameter configuration

Section Coherent Frequency Calculator Provision for entering desired Ain Frequency

Section User Defined Dynamic Range Provision for selecting Low and High frequency

Section

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ECG\RESP Sub-Tab

The ECG\RESP Display sub-tab displays the ECG data for Lead I, Lead II, Lead III, Lead aVR, Lead aVL, or Lead aVF for the ADS1192 and ADS1292. The ADS1292R only displays Lead I or Respiration data.

Running the Software

Figure 28. PC Application Analysis – ECG

Figure 29. PC Application Analysis – ADS1292R Respiration (Low Pass Filter Enabled)

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Running the Software

The following buttons/controls are available in this sub-tab:

Button/Control Description

Plot Set Option to select ECG Lead I, Lead II, Lead III, Lead aVR, Lead aVL, Lead aVF or Respiration Channel

High Pass Filter Provision for enabling a high pass filter with support for selecting the order of the filter and cut off frequency Low Pass Filter Provision for enabling a low pass filter with support for selecting the order of the filter and cut off frequency Notch Filter Provision for enabling a notch filter for 50Hz or 60Hz with support for selecting the order of the filter. This filter

(1)

Post- processing for filter done in GUI.

Apart from the above specific buttons / control on each sub-tabs, the following options are available by right-clicking in the display area:

Display Options Description

Auto scaling Both x-scale and y-scale auto scaling is possible. User can enable or disable this feature Export Data The displayed data can be exported to excel or Clipboard Annotation Provision Provision provided for creating and deleting annotation Visible Items selector Option to display x-scale, y-scale, Plot legends, x-scrollbar Plot legend options Plot legend gives various option to change the color of the plotting, various plotting styles etc

4.1.3 Save Tab

The Save tab provides provisions to save the analysis or data to a file. By default, the data is saved to C:\Program Files\Texas Instruments\ADS1x9xevm\saved. Use the Directory to Save Files option to

select the folder where data is to be saved. In the pop up window, navigate to the folder where the file is to be saved and select Use Current Folder. Then select Save to File to save the file.

(ADS1292R only)

will be applied on the acquired data for the sampling rate of 500SPS

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(1)

The following options are provided in the Save tab.

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Figure 30. PC Application Save

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Button/Control Description

Scope Analysis For saving scope analysis result.

The result will be saved in the file “Device_<record number>_Analysis.xls”.

FFT Analysis For saving FFT analysis result.

The result will be saved in the file “Device_<record number>_Analysis.xls”.

Histogram For saving histogram analysis result. Analysis The result will be saved in the file “Device_<record number>_Analysis.xls”.

The result will be saved in the file “Device_<record number>_Analysis.xls”. Data - Codes Acquired data sample values will be stored to the file “Device_ <record number>_Codes.xls” Data - Volts Acquired data sample’s voltage values will be stored to the file “Device_ <record number>_Volts.xls” FFT Data Acquired data sample’s FFT values will be stored to the file “Device_ <record number>_FFT.xls” Histogram Data Acquired data sample’s histogram values will be stored to the file “Device_ <record number>_Histogram.xls”

The Record Number saves files with the provided number in the file name. There are options to select Channel 1 and Channel 2 while saving the corresponding data to the file.

User notes also can be added to the file by typing the notes in the User Comments control.

4.1.4 Live ECG / RESP Display Tab

Live ECG and respiration data are shown on the Live ECG/RESP Display tab. This tab also shows the heart rate, respiration rate and lead-off information.

Running the Software

Figure 31. PC Application Live ECG for ADS1292R

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Running the Software

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Figure 32. PC Application Live Respiration Channel

Live ECG display or respiration display is started by clicking on Start Data Streaming and can be stopped by clicking on Stop Data Streaming.

The following buttons/controls are available in this sub-tab:

Buttons/Control Description

Lead selection The following can be selected for the live display

● ECG Lead I

● ECG Lead II

● ECG Lead III

● ECG Lead aVR

● ECG Lead aVL

● ECG Lead aVF

● Respiration Channel (ADS1292R only)

Signal BW Signal bandwidth can be selected to either 40 Hz or 150 Hz. The filter on the EVM board is

Notch filter Provision for selecting either 50-Hz or 60-Hz notch filter. The filter on the EVM board is

Auto scaling Both x-scale and y-scale auto scaling is possible. User can enable or disable this feature. (Right-click on the display area)

Export data The displayed data can be exported to EXCEL™ or the clipboard. (Right-click on the display area)

Visible items selector Option to display x-scale, y-scale, plot legends, x-scrollbar. (Right-click on the display area)

Plot legend options Plot legend gives various option to change the color of the plot, various plotting styles, etc. (Right-click on the plot legend)

automatically enabled based on the selection made.

The Lead-off Status is interpreted as shown in the table below.

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Leads Lead Off Status

LL off IN2P is red RA off IN2N and IN1N are red LA off IN1P is red

Monitoring lead-off information is achieved by polling the Status byte in the data-word after each conversion. Within the ADS1x9xECG-FE software, there are two ways to view the Lead-Off Status. Within the Live ECG\RESP tab, the information about the lead status is shown in the upper right corner of the GUI. Within the Analysis tab, a pop-up window showing the status can be viewed by clicking on the

Show/Poll Lead-Off Status button.

5 ADS1x9xECG-FE Hardware Introduction

The key features of the ADS1x9x analog front end demonstration board are:

• Based on MSP430F5529

• ADS1192 and ADS1292 suitable for six leads of ECG: Lead I, Lead II, Lead III, Lead aVR, Lead aVL, or Lead aVF

• ADS1292R suitable for one lead of ECG (Lead I) and respiration channel

• Low power consumption (350 Micro Watt/channel)

• Data Rate ranges from 125 SPS to 8 kSPS

• Unipolar Operation

• Lead off detection circuitry

• On chip oscillator and reference

• On chip RLD amplifier

• SPI data interface

• 8Gb NAND Flash support

The ADS1x9xECG-FE can be used as a demo board for standard six lead ECG and respiration channel using four electrode inputs. Defibrillator protection and patient protection circuitry are not provided on the ADS1x9xECG-FE board. The printed circuit board (PCB) and schematic are shown in Appendix C.

MSP430F5529 (U7) is the micro-controller used on the board. For more details of the MSP430F5529 please visit http://focus.ti.com/docs/prod/folders/print/msp430f5529.html

The following sections explain the main hardware components available on the ADS1x9xECG-FE.

ADS1x9xECG-FE Hardware Introduction

5.1 Power Supply

ADS1x9x can operate from 2.7 V to 5.25 V analog supply (AVDD/AVSS) and 1.65 to 3.6V (DVDD) digital supply. In this design the ADS1x9x is operated at 3 V analog and 3.3 V digital.

The power for the board is derived from the USB input (P1) through a forward biased diode (D3) to avoid reverse current flow. The USB data bus is ESD protected using TI’s ESD protection diode array TPD4E004DRYR (U2). The USB VBUS is fed to the integrated Li-ion linear charger and system powerpath management module, BQ24032ARHLR (U8), which generates greater than 4.2V output (VCC_BAT). This output is then fed to TI’s low-power linear voltage regulator, TPS73033 (U16), for generating regulated 3.3V for digital section of the board. The 3V supply for the analog section is derived from VCC_BAT using TI’s low dropout voltage regulator TPS73201 (U10).

The inductors L3, L4, L5 and L7 are used to minimize the power supply noise induced by the power supply regulators.

The test points TP25, TP32 are provided to make sure the power supplied to the board is correct. The corresponding voltages are given in the table below. The analog power supply (ADS_AVDD) is also brought out on connector P3.

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ADS1x9xECG-FE Hardware Introduction

Sl NO Test Point Description

1 TP25 3.3 V 2 TP32 ADS_AVDD, 3.0 V

5.2 Clock

The ADS1x9x includes an on-chip circuit which generates a 512 kHz clock, ±2% over temperature. For application requiring higher accuracy the ADS1x9x can also use an external clock signal. The demonstration kit provides the firmware option to select either an internal or external clock for testing. The demonstration kit also provides the option to generate an external clock for the ADC from the MSP430 or onboard oscillator.

Oscillators O2 (24MHz) and O3 (32.768 KHz) are used by the micro-controller.

Clock Type R21 R24 Clock SEL

Internal Clock Not Installed Not Installed OR

External Clock Not Installed Installed OR

5.3 Memory

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Mount R77 to Drive “high” on ADC_CLK_SCL

Set P2.3 of MSP430 to Drive “high” on ADC_CLK_SCL.

Mount R76 to Drive “low” on ADC_CLK_SCL

Clear P2.3 of MSP430 to Drive “low” on ADC_CLK_SCL.

ADS1x9xECG-FE has 8GB NAND Flash memory (U14) installed for data storage.

5.4 Accessing ADS1x9x Digital Signals

ADS1x9x SPI interface with MSP430 can be accessed through the test points given in the table below:

Sl NO. Signal Test Points

1 ADC_CS TP24 2 ADC_START TP56 3 ADC_DOUT TP47 4 ADC_SCLK TP11 5 ADC_DIN TP46 6 ADC_DRDY TP52 7 ADC_RESET TP53 8 CLK TP42

5.5 GPIO Test Points

There are two GPIO connections between the ADS1x9x and the MSP430 micro-controller, which are accessible through the test points given in the table below:

Sl NO. Signal Test Points

1 ADC_GPIO1 TP15 2 ADC_GPIO2 TP16

5.6 Analog Inputs

The ADS1x9xECG-FE gives the user the option to feed in the standard ECG/Respiration signals from a patient simulator to the DB9 connector (P5).

The output from any typical patient simulator can be directly fed into the DB9 connector. For all measurements in this user guide a Fluke medSim 300B simulator was used as shown in Figure 33.

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ADS1x9xECG-FE Hardware Introduction

5.7 USB Interface

The ADS1x9xECG-FE has a mini USB interface for PC application connectivity requiring a standard mini USB to USB cable for connection. ADS1x9xECG-FE is designed to work in the slave mode.

5.8 Onboard Key Interface

The ADS1x9xECG-FE board has four switches. Figure 34 details the position of each switch.

Figure 33. Simulator Connection

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SW4

SW2

SW3

SW1

Evaluation of ECG and Respiration Specific Functions

Figure 34. Switch Positions

The function of each switch is defined in the following table:

Switch Number Description

SW1 This switch is used to enable boot strap loader (BSL) MSP430 firmware. SW2 Unused SW3 This switch is used for hard reset of the board. The board will reset and start again with the firmware loaded. SW4 Unused

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5.9 Visual Indication

The demonstration kit has two LEDs to indicate various operating states. The flashing green LED (D2) indicates the ADS1x9xECG-FE is in the idle state and steady blue LED (D1) indicates the micro-controller is busy in servicing requests from the PC application.

6 Evaluation of ECG and Respiration Specific Functions

The micro-controller receives the two-channel data from ADC through the SPI interface to send to the PC. The software is designed to handle the following activities:

• Data acquisition

• ADC Lead off detection

• DC signal removal

• Multi band pass filtering

• ECG lead formation

• QRS (HR) detection

• RR Detection

• USB communication

• Firmware upgrade through USB

The high level architecture of the firmware implementation for the ADS1292R is given below:

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1. Read ADS1x9x data

2. Process raw data

3. Compute HR and RR.

4. Stream data to PC application through USB.

5. Update status on LED.

1. Update/read reg.

2. Interface with PC app.

3. Update status LED’s

Main loop : States

USB Receive and Transmit DMA Handler

ADS1292R REG Configuration

ADS1292R Data streaming

ADS1292R Data dumping

ADS1292R Firmware upgrade

1. Read packet from memory.

2. Transfer data to PC application through USB.

3. Update Status on LED’s.

1. Force firmware to BSL code.

2. Upgrade Firmware.

3. Reset firmware.

Initialize Peripherals

System parameters.

Start

ADS1292R DRDY interrupt .

1. Monitor user commands.

ADS1292R IDLE

ADS1292R SPI interrupt .

ADS1292R Data Recording

1. Read ADS1292R data

2. Filter raw ECG data

3. Compute HR and RR.

4. Store packet to memory.

5. Update status on LED.

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Evaluation of ECG and Respiration Specific Functions

6.1 Evaluation Mode (Analysis Mode)

Figure 35. Firmware Architecture

The PC application consists of a LabVIEW front-end GUI with a back-end DLL written using C++. The DLL interfaces with the Windows USB driver and communicates to the demonstration kit. The LabVIEW front end GUI uses function calls to communicate with the demonstration kit through the DLL.

There are two general operating modes available in the system.

1. Evaluation Mode (Analysis Mode)

2. Live Data Streaming Mode

The Analysis Mode is used for the following requests:

1. Register setting

2. Register read

3. Data acquire Firmware configures the ADC registers with default values during power on. Users can change the

register settings through the PC application GUI. The register setting request from the PC is processed by the firmware and the appropriate register set command will be sent to the ADC.

During the data acquire request, the firmware will process the number of samples to be acquired as set in the GUI. The firmware instructs the ADC to start the data conversion in continuous mode. Based on the sampling rate configured, the ADC generates data ready pulses (DRDY) which are used by the microcontroller to indicate when to read data back. The data is stored in the onboard flash memory and later sent to the PC application in individual packets. Each packet contains 8 samples which are 24bits in length.

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Data Packetize Module (CH1 and CH2)

Data Acquisition

ADC data DRDY

Interrupt

USB

PC Application

SPI Interrupt

2 Channel Data

Reader

ADS1292R Configuration

Module

ADS1292R DATA FLOW DIAGRAM:

ECG and Respiration Evaluation Mode

Decode PC Commands

USB

SPI

Evaluation of ECG and Respiration Specific Functions

Figure 36. Evaluation Mode Data Flow for ADS1292R

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6.2 Live Data Streaming Mode

The Live ECG / Live Respiration data streaming can be started from the PC applicationLive ECG \ RESP Display tab by clicking Start Data Streaming. The PC application will set the sampling rate to 500SPS

before requesting the firmware to start the live data streaming. The firmware will instruct the converter to run in continuous conversion mode, monitoring the DRDY

interrupt for notification as to when new data is ready. Based on the interrupt, the firmware reads the data from the ADC.

The firmware applies the following filters on the data read:

1. DC removal IIR filter

2. Multiband-pass FIR filter with 50/60 Hz notch (user selectable) or band-pass filter The filtered signal is used for detecting the heart rate, respiration rate and deriving ECG leads. Filters are

applied only for live data streaming mode. The system data flow diagram for live data stream mode is given in Figure 37.

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FIR Filters for ECG (CH2) & Respiration (CH1)

Data Acquisition

From ADC

ADC data DRDY

Interrupt

MemoryUSB

PC Application

SPI Interrupt

2 ChannelData

Reader

IIR Filter (DC Removal)

QRS Algorithm (HR) CH2

Lead Off

Status

Respiration Rate Algorithm (RR) CH1

ECG signal

Respiration signal

ADS1292R DATA FLOW DIAGRAM: PROCESSED ECG and RESPIRATION

DRDY

Interrupt

Decode PC Commands

Lead Off Status

1 ECG Lead

1 RESPIRATION CH.

Lead Off Status

USB

SPI

-1

Y(z) 1 - z

H(z) = =

X(z) 1 - az

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Evaluation of ECG and Respiration Specific Functions

Figure 37. Live Data Stream Mode Data Flow for ADS1292R

6.2.1 Filters IIR Filter - DC signal removal

1st Order IIR filter is used to remove the DC component from the acquired data. The following transfer function is used for the filter:

To provide DC attenuation at 22dB, the value of alpha is chosen as 0.992. The IIR filter output is scaled down to 16-bit and then provided to the FIR filter. The frequency response for the IIR filter is shown in

Figure 38.

(1)

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Evaluation of ECG and Respiration Specific Functions

Figure 38. Frequency Response for the IIR Filter

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Multiband-pass Filter

Multiband-pass filter (MBF) is used for removing unwanted signals and power line noise from the live data. The MBF digital filter is a 161 order FIR filter with Hamming window having cut-off at 150Hz and notch at

50/60 Hz. The notch frequency is selectable from the PC application. This filter provides a very sharp cutoff around 150 Hz with attenuation more than 30 dB at the stop band. The notch at 50/60 Hz provides attenuation of more than 30 dB. Sampling frequency is 500 samples/ second.

The frequency response of the filter with a 50 Hz notch is shown in Figure 39, Figure 40, and Figure 41.

Figure 39. Frequency Response for the MBF Filter (Full View)

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Evaluation of ECG and Respiration Specific Functions

Figure 40. Frequency Response for the MBF Filter (50Hz Notch)

Figure 41. Frequency Response for the MBF Filter (Sharp cut off Around 150Hz)

Band Pass Filter

PC application allows the selection of a 161 order muscle artifact filter, which has a passband of 0.67 Hz to 40 Hz. This filter provides a sharp cut-off at 40 Hz with attenuation of 30 dB at the stop band. The frequency response for the filter is shown in Figure 42.

Figure 42. Frequency Response for the Band Pass Filter

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Evaluation of ECG and Respiration Specific Functions

6.2.2 Lead Derivation

The demonstration kit is configured to generate two ECG leads (Lead I and Lead II) from the four electrodes using two channels of the ADS1192 and ADS1292 data. The other four ECG leads are computed from Lead I and Lead II using the following equations:

Lead III = Lead II - Lead I Lead aVR = - Lead II + 0.5 * Lead III Lead aVL = Lead I - 0.5 * Lead II Lead aVF = Lead III + 0.5 * Lead The ADS1292R demonstration kit is configured to generate one ECG lead (Lead I) and one respiration

channel from the four electrodes using the two channels.

6.2.3 QRS and Respiration Rate Detection

QRS detection is based on first derivative of the Lead I ECG signal and threshold. Once five consecutive QRS are detected, the heart rate is calculated by taking average of the five RR intervals.

The following steps are involved for calculating heart rate:

1. Calculate first derivative of the Lead I ECG signal samples. The first derivative for any sample is

calculated as y0(n) = |x(n+1) – x(–1)| Where,

y0(n) is the first derivative. x (n+1) is the sample value for (n + 1) th sample. x (n – 1) is the sample value for (n – 1) th sample.

2. The initial two seconds of the first derivative is stored in a buffer and the maximum value (P) in this

buffer is obtained.

3. Calculate the threshold as 0.7 x P.

4. Whenever a derivative crosses the threshold, the ECG sample index (S1) of that particular sample is

marked.

5. The QRS peak is detected by scanning the next 40 derivatives (MAXIMA_SEARCH_WINDOW = 40)

and obtaining the maxima (M1) .This maxima (M1) value is stored in another buffer.

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6. After detecting a QRS peak, the next 50 samples (SKIP_WINDOW = 50) are skipped to take care of

the minimum RR interval that can occur in the case of maximum detectable heart rate (i.e. 240 BPM).

7. Next five QRS peaks are detected by repeating steps 4 to 7.

8. RR interval is calculated as the number of samples between two consecutive QRS peaks.

9. Heart rate is calculated using the below formula HR per Minute = (60 * Sampling Rate)/ (Average RR

interval for 5 consecutive RR intervals )

10. Threshold also gets recalculated from the QRS peak values detected.

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Respiration rate for boards with the ADS1292R installed is calculated from the respiration waveform using the similar algorithm mentioned above.

USB Receive and transmit module

The processed ECG and Respiration data including the heart rate, lead-off status, and respiration rate is communicated to the PC, packet by packet, through the ECG interface. The packet contains 14 samples of data, each being 16bits in width.

7 USB-Based Firmware Upgrade

The firmware on the ADS1x9xECG-FE can be changed from the PC application by selecting the Firmware Upgrade option on the PC application. At the end of the firmware upgrade, the system issues a reset command and will reload with new firmware. The firmware upgrade process steps are represented in the below screen shots:

1. Select PC application menu File> Load Firmware

USB-Based Firmware Upgrade

Figure 43. PC Application Firmware Upgrade - 1

2. The firmware upgrade application window and the application will detect the connected ADS1x9xECG-

FE.

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Connector Interface

3. Browse and select the firmware binary file (.txt file) and click “Upgrade Firmware”

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Figure 44. PC Application Firmware Upgrade - 2

Figure 45. PC Application Firmware Upgrade - 3

NOTE: The default firmware will be available at C:\Program Files\Texas

Instruments\ADS1x9xevm\Firmware.

4. Device will reset and come up with new firmware with itself.

8 Connector Interface

The following connectors used for external interface to ADS1x9x ECG recorder board.

• DB9

• USB mini connector

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8.1 DB9 ECG Electrode Connector

Figure 46. DB9 ECG Connector Pin Outs

NO Signal Description

1 ERA 2 ELA 3 ELL 4 ERL 5 NC No Connect 6 NC No Connect 7 NC No Connect

8,9 ECG_SHD_DRV

8.2 USB Mini Connector

Figure 47. USB Mini Connector Pin Outs

NO Signal Description

1 VBUS USB power 5 V 2 D– USB DM 3 D+ USB DP 4 ID NC 5 GND GND

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Appendix A ECG Cable Details

The DB9 ECG connector uses the following pin out.

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Pin Electrode Name

1 RA 2 LA 3 LL 4 RL 5 Open 6 Open 7 Open 8 Shield 9 Shield

The ECG cable can be ordered through http://www.biometriccables.com/ using the part number N26082011.

ECG Cable Details SLAU384A–December 2011–Revised April 2012

Figure 48. ECG Cable Drawing

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Appendix B ADS1x9x EVM Bill of Materials (BOM)

The following pages show the bill of materials table, landscaped for readability.

SLAU384A–December 2011–Revised April 2012 ADS1x9x EVM Bill of Materials (BOM)

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Appendix B

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Table 1. Bill of Materials

Quantity

Item ADS1292R ADS1292 ADS1192 Ref Des Description Manufacturer Part Number

1 1 1 1 Printed Wiring Board TI 6525569 2 0 0 0 ANT1 Not Installed

C1 ,C2, C3, C4, C5, C11, C12, C20, C26, C51, C54,

3 0 0 0 C55, C57, C61, C69, C71, Not Installed

C73, C74, C78, C79, C80, C83, C89, C90, C91, C92

C6, C34, C35, C36, C38, C41,

4 10 10 10 CAP CER 10UF 6.3V X5R 20% 0603 AVX 06036D106MAT2A

C43, C65, C70, C85

5 4 4 4 C7, C8, C21, C25 CAP CER 10PF 50V NP0 RF 0402 AVX 04025U100CAT2A

C9, C13, C15, C19, C28, C31, C33, C39, C44, C52, C63,

6 18 18 18 CAP CER 0.1UF 16V X7R 0402 TDK C1005X7R1C104K

C64,C67, C72, C76, C77, C84, C87

7 2 2 2 C10 CAP CER 4700PF 10V 0402 LOW DIST TaiyoYuden LMK105SD472KV-F

0 1 1 CAP CER 4700PF 10V 0402 LOW DIST Taiyo Yuden LMK105SD472KV-F

8 C24

1 0 0 CAP CER 0.047UF 10V 10% X7R 0402 Murata GRM155R71A473KA01D

C14, C18, C22, C27, C40,

9 8 8 8 CAP CERM 1.0UF 10% 6.3V X5R 0402 AVX 04026D105KAT2A

C58, C86, C88 10 0 0 0 C16, C59, C62 Not Installed 11 2 2 2 C17, C66 CAP CER 0.22UF 16V X7R 0402 Murata GRM155R71C224KA12D 12 1 1 1 C23 CAP CER 1500PF 50V X7R 0402 AVX 04025C152JAT2A 13 2 2 2 C29, C30 CAP CER 12PF 5% 50V NP0 0402 AVX 04025A120JAT2A 14 1 1 1 C32 CAP CER 0.47UF 16V X5R 0402 TDK C1005X5R1C474K 15 3 3 3 C37, C81, C82 CAP CER 2.2UF 4.0V X5R 20% 0402 AVX 04024D225MAT2A 16 2 2 2 C42, C75 CAP CERM 10000PF 5% 16V X7R 0402 AVX 0402YC103JAT2A 17 2 0 0 C45, C47 CAP CERM 2200PF 10% 50V X7R 0402 AVX 04025C222KAT2A 18 2 0 0 CAP CER 0.1UF 16V X7R 0402 TDK C1005X7R1C104K

C46,C48 19 0 2 2 RES 0.0 OHM 1/10W 0402 SMD Panasonic ERJ-2GE0R00X

20 2 0 0 CAP CERM 2200PF 10% 50V X7R 0402 AVX 04025C222KAT2A

C49, C50 21 0 2 2 RES 0.0 OHM 1/10W 0402 SMD Panasonic ERJ-2GE0R00X

22 1 1 1 C53 CAP CER 4.7UF 6.3V X5R 0402 Murata GRM155R60J475ME87D 23 2 2 2 C56, C60 CAP CERM 47PF 5% 50V NP0 0402 AVX 04025A470JAT2A 24 1 1 1 C68 CAP TANT 22UF 6.3V 20% 0805 AVX TACH226M006XTA 25 1 1 1 D1 LED 470NM BLUE CLEAR 0603 SMD Rohm SMLE12BC7TT86 26 1 1 1 D2 LED 565NM GRN DIFF 0603 SMD Lumex SML-LX0603GW-TR 27 1 1 1 D3 DIODE SCHOTTKY 400MW 20V SOD123 Diodes Inc SD103CW-13-F 28 0 0 0 D4 Not Installed 29 0 0 0 L1, L2 NotInstalled

ADS1x9x EVM Bill of Materials (BOM) SLAU384A– December 2011–Revised April 2012

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Appendix B

Table 1. Bill of Materials (continued)

Quantity

Item ADS1292R ADS1292 ADS1192 Ref Des Description Manufacturer Part Number

30 1 1 1 L3 FERRITE CHIP 120 OHM 2000MA 0603 Murata BLM18PG121SN1D 31 2 2 2 L4,L7 FILTER CHIP 220 OHM 2A 0603 Murata BLM18EG221SN1D 32 1 1 1 L5 INDUCTOR POWER 3.3UH 1.3A SMD TDK VLF4012AT-3R3M1R3 33 0 0 0 L6 Not Installed 34 0 0 0 O1 Not Installed 35 1 1 1 O2 CRYSTAL 24.0000MHZ 10PF SMD Abracon ABM3B-24.000MHZ-10-1-U-T 36 1 1 1 O3 CRYSTAL 32.768KHZ 12.5PF SMD Abracon ABS07-32.768KHZ-T 37 1 1 1 P1 CONN RCPT MINIUSB B 5POS SMD R/A Molex Inc 513870530 38 0 0 0 P2 Not Installed 39 1 1 1 P3 3 pin Connector Samtec SSW-103-02-S-S-RA 40 0 0 0 P4 Not Installed 41 1 1 1 P5 CONN D-SUB RCPT R/A 9POS GOLD/FL TE Connectivity 1734354-1 42 0 0 0 P6 Not Installed 43 1 1 1 Q1 TRANSISTOR NPN 25V 50MA SOT-23 On Semi MMBT5089LT1G

R1, R3, R5, R6, R7, R8, R9,

R13, R15, R17, R21, R22,

R24, R25, R28, R39, R41,

R42, R47, R65, R67, R68, 44 0 0 0 Not Installed

R74, R76, R78, R79, R80,

R81, R83, R86, R88, R89,

R90, R91, R92, R93, R96,

R103 45 0 0 0 R2 Not Installed

R4, R46, R60, R97, R108, 46 7 7 7 RES 0.0 OHM .33W 0805 SMD Vishay/Dale CRCW08050000Z0EAHP

R111, R114 47 2 2 2 R10, R36 RES 1.0M OHM 1/10W 5% 0402 SMD Panasonic ERJ-2GEJ105X 48 3 3 3 R11, R12, R20 RES 33 OHM 1/10W 5% 0402 SMD Panasonic ERJ-2GEJ330X 49 1 1 1 R14 RES 1.40K OHM 1/10W 1% 0402 SMD Panasonic ERJ-2RKF1401X

1 0 0 R16

50 1 1 1 R73 RES 51K OHM 1/10W 5% 0402 SMD Panasonic ERJ-2GEJ513X

0 1 1 R85

R18, R19, R29, R30, R31, 51 15 15 15 R32, R33, R34, R38, R48, RES 10K OHM 1/10W 5% 0402 SMD Panasonic ERJ-2GEJ103X

R52, R53, R77, R94, R95

R23, R26, R27, R37, R40,

R44, R45, R49, R51, R54, 52 22 22 22 R55, R75, R84, R98, R99, RES 0.0 OHM 1/10W 0402 SMD Panasonic ERJ-2GE0R00X

R100, R102, R105, R106,

R109, R110, R113 53 2 2 2 R35, R117 RES 100K OHM 1/10W 5% 0402 SMD Panasonic ERJ-2GEJ104X

SLAU384A– December 2011–Revised April 2012 ADS1x9x EVM Bill of Materials (BOM)

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Appendix B

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Table 1. Bill of Materials (continued)

Quantity

Item ADS1292R ADS1292 ADS1192 Ref Des Description Manufacturer Part Number

54 3 3 3 R43, R101,R107 RES 1.0K OHM 1/10W 5% 0402 SMD Panasonic ERJ-2GEJ102X 55 1 1 1 R50 RES 33K OHM 1/10W 5% 0402 SMD Panasonic ERJ-2GEJ333X 56 1 1 1 R56 RES 130 OHM 1/10W 5% 0402 SMD Panasonic ERJ-2GEJ131X 57 1 1 1 R57 RES 220 OHM 1/10W 5% 0402 SMD Panasonic ERJ-2GEJ221X 58 1 1 1 R58 RES 47K OHM 1/10W 5% 0402 SMD Panasonic ERJ-2GEJ473X 59 1 1 1 R59 RES 46.4K OHM 1/10W 1% 0402 SMD Panasonic ERJ-2RKF4642X 60 1 1 1 R61 RES 30.9K OHM 1/10W 1% 0402 SMD Panasonic ERJ-2RKF3092X 61 4 0 0 R62, R64, R66, R72 RES 10.0M OHM 1/16W 1% 0402 SMD Panasonic CRCW040210M0FKED 62 2 0 0 RES 0.0 OHM 1/10W 0402 SMD Panasonic ERJ-2GE0R00X

R63, R71 63 0 2 2 RES 51K OHM 1/10W 5% 0402 SMD Panasonic ERJ-2GEJ513X

64 2 0 0 R69, R70 RES 40K OHM 0.15W 0.1% 0603 Vishay/Thin Film PAT0603E4002BST1 65 2 2 2 R82, R115 RES 100 OHM 1/10W 5% 0402 SMD Panasonic ERJ-2GEJ101X 66 0 0 0 R87 Not Installed 67 1 1 1 R104 RES 4.7K OHM 1/10W 5% 0402 SMD Panasonic ERJ-2GEJ472X 68 1 1 1 R112 RES 10 OHM 1/10W 5% 0402 SMD Panasonic ERJ-2GEJ100X 69 2 2 2 R116, R118 RES 0.0 OHM 1/10W 0402 SMD Panasonic ERJ-2GE0R00X 70 2 2 2 SW1,SW4 SWITCH LT 6MM 160GF 5MM HEIGHT Panasonic EVQ-21505R 71 2 2 2 SW2,SW3 SWITCH TACT 2.36MM SILVR G-WING C&K Components KT11P2SM34LFS 72 0 0 0 TP1-TP60 73 0 0 0 U1 Not Installed 74 1 1 1 U2 4-Channel ESD-Protection Array Texas Instruments TPD4E004DRYR 75 0 0 0 U3 Not Installed 76 0 0 0 U4 Not Installed

2 channel Analog to Digital Converter (24 bit

77 1 0 0 Texas Instruments ADS1292RIPBS

with resp)

U5 78 0 1 0 2 channel Analog to Digital Converter (24 bit) Texas Instruments ADS1292IPBS

79 0 0 1 2 channel Analog to Digital Converter (16 bit) Texas Instruments ADS1192IPBS 80 1 1 1 U7 MSP Microcontroller Texas Instruments MSP430F5529IPNR 81 1 1 1 U8 Power-Path Management IC Texas Instruments BQ24032ARHLR 82 1 1 1 U9 2 bit Voltage Level Shfter Texas Instruments TXS0102DCTR 83 1 1 1 U10 3V Low-Dropout Regulator Texas Instruments TPS73201DBVT 84 0 0 0 U11 Not Installed 85 0 0 0 U12 Not Installed 86 0 0 0 U13 Not Installed 87 1 1 1 U14 8Gb NAND Flash Micron MT29F8G08ABABAWP:B 88 0 0 0 U15 Not Installed

ADS1x9x EVM Bill of Materials (BOM) SLAU384A– December 2011–Revised April 2012

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Appendix B

Table 1. Bill of Materials (continued)

Quantity

Item ADS1292R ADS1292 ADS1192 Ref Des Description Manufacturer Part Number

89 1 1 1 U16 3.3V Linear Regulator Texas Instruments TPS73033DBVR 90 0 0 0 U17 Not Installed 91 1 1 1 U18 3.3V supervisors Texas Instruments TPS3825-33DBVT

Battery Assembly

92 0 0 0 Connector on battery CONN HOUSING 2POS .100 W/O RAMP Molex 22012021 93 0 0 0 Connector on battery CONN TERM CRIMP 18-24AWG TIN Molex 8030303 94 0 0 0 Battery 4.2VLi Ion Battery Power Stream GM065080 95 0 0 0 Battery Cable 22 AWG red color cable 96 0 0 0 Battery Cable 22 AWG black color cable

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Appendix C PCB Layout and Schematics

C.1 PCB Layout

The following pages show the PCB layout, landscaped for readability.

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PCB Layout and Schematics SLAU384A–December 2011–Revised April 2012

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PCB Layout

Figure 49. Top Layer Placement

SLAU384A– December 2011–Revised April 2012 PCB Layout and Schematics

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PCB Layout

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Figure 50. Bottom Layer Placement

PCB Layout and Schematics SLAU384A–December 2011–Revised April 2012

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C.2 Schematics

The schematics are appended to the end of this data sheet.

Schematics

SLAU384A–December 2011–Revised April 2012 PCB Layout and Schematics

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5 4 3 2 1

12345

Title

Size Document Number Rev

Date: Sheet of 7

ADS1x9xECG FE A

Block Diagram

Thursday, August 04, 2011

Battery

Power

Module

USB

I2C

SPI

USB

UART

JTAG

Module

GPIO

SPI

GPIO

Flash

Memory

Micro SD

LEDs &

Keys

Optional Must have modules

Data

Power

To PC

Application

1.ADS1292R - 24 bit 2 Ch

-- 1 Ch ECG

2.ADS1292 - 24 bit 2 Ch

-- 2 Ch ECG

3.ADS1192 - 16 bit 2 Ch

-- 2 Ch ECG

-- 1 Ch Respiration

Place the decoupling capacitors close to power pins in layout

DNI

5 4 3 2 1

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Title

Size Document Number Rev

Date: Sheet of 7

ADS1x9xECG FE

ADS1292

Thursday, August 04, 2011

Note:

For two channel ECG Do the following modification

1) Mount 51K resistor in place of R71 and R63

2) Mount 0 Ohm resistors in place of C48, C46, C49 and C50

3) Make following components DNI R66, R64, R72, R62, C47,C45,R70 and R69

External Clock

ELL ELA ERA

ERL

ECG_SHD_DRV

C45

2.2nF

R32 10K

R44

R63

ENB

GND

OUT

VDD

TP53

C69

5 9 4 8 3 7 2 6 1

482016042

R55

R85

51K

R21

R77

10K

C58 1uF

C24

4.7nF

TP38

BLM18PG121SN1P

R62

10M (1%)

C15

0.1uF

TP11

R64 10M (1%)

C22 1uF

TP47

R26

R6940K

C10

4.7nF

C19

0.1uF

R27

R76

DNI

C56 47pF

TP46

TP56

TP24

C14 1uF

TP52

TP42

R45

R41

C4 NI

C18 1uF

R36 1M

R34 10K

R37

R54

R66 10M (1%)

C60 47pF

C6 10uF

C49

2.2nF

TP16

R73

51K

R72

10M (1%)

C71

R23

PGA1N

PGA1P

IN1N

IN1P

IN2N

IN2P

PGA2N

PGA2P

VREFP10VREFN

VCAP1

AVDD13AVSS14CLKSEL

PWDN#/RESET#

START

CLK

CS#

DIN

SCLK

DOUT

DRDY#

DVDD

DGND

GPIO2/RCLK226GPIO1/RCLK1

VCAP2

RLDINV

RLDIN/RLDREF

RLDOUT

RESP_MODP/IN3P

RESP_MODN/IN3N

ADS1292R

R70

40K

C50

2.2nF

0.1uF

R71

C23

1.5nF 1

TP15

3 4

U15

TP34

C47

2.2nF

C87

0.1uF

C88

1uF

R16 NI

DNI

C48

0.1uF

C46

0.1uF

R116

R118

C89 NI

DNI

C90

DNI

C92

DNI

C91 NI

DNI

R35 100K

R117

100K

ADS_DVDD

VCC_3_3

ADS_DVDD

AVSS

ADS_AVDD

AVSS

ADS_AVDD

AVSS

ADS_AVDD

AVSS

ADS_DVDD

ADC_GPIO2 ADC_GPIO1

ADC_CLK

ADC_CS ADC_START

ADC_SCLK

ADC_RESET

ADC_DRDY

RESP_MOD_M

ERL

RESP_MOD_P

ADC_CLK_SCL

ADS_AVDD

AVSS

ADC_DOUT

ADC_DIN

AVSS

ELL

5 4 3 2 1

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Title

Size Document Number Rev

Date: Sheet of 7

ADS1x9xECG FE

ADS1292 Power Supply

Thursday, August 04, 2011

C38

10uF

C36 10uF

R60

R61

30.9K

C39

0.1uF

GND

NR/FB

OUT

U10

TPS73201

R59

46.4K

TP32

C42

0.01uF

3.3uH

R46

C37

2.2uF

C40 1uF

C41 10uF

ADS_AVDD

VCC_BAT

AVSS

1% tol

5% tol

5 4 3 2 1

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Size Document Number Rev

Date: Sheet of 7

ADS1x9xECG FE A

USB, Micro SD, USB Interfaces

Thursday, August 04, 2011

SDCARD

DNI

TP10

C43 10uF

C63

0.1uF

RSV1

VCC

CLK

VSS

RSV2

R75

TP36

TP59

SW1

EVQ-21505R

IO12IO23IO34IO4

IO56IO67IO78IO8

GND

U11

TP37

C64

0.1uF

R82

100E

NC1

NC2

NC3

NC4

NC5

R/B2#

R/B#

RE#

CE#

CE2#

NC6

VCC

VSS

NC7

NC8

CLE

ALE

WE#

WP#

DNU1

DNU2

DNU3

NC9

NC10

NC11

NC12

NC13

NC14

I/O0

I/O1

I/O2

I/O3

NC15

NC16

NC17

VSS

VCC

PRE/VSS2

NC18

NC19

I/O4

I/O5

I/O6

I/O7

NC20

NC21

NC22

NC23

U14

MT298G08AAAWP

R93 NI

DNI

R107 1K

TP41

TP58

IO12IO2

GND

IO35IO4

VCC

TPD4E004DRYR

10pF

R68

D3 SD103AW-13-F

R67

R102

TP55

R109 0E

R98 0E

R106

R14

1.4K

R12

33E

R101 1K

C52

0.1uF

TP30

TP33

C62 NI

R65

C8 10pF

TP57

R10 1M

VBUS

D-

D+

GND

SHIELD1

SHIELD2

0513870530

C78 NI

TP54

R11 33E

R100

R99

R105

R94

10K

R110

C53

4.7uF

VCC_3_3

FLASH_CE FLASH_CE2 FLASH_CLE FLASH_ALE FLASH_WE

FLASH_RE FLASH_RB FLASH_RB2

FLASH_IO0 FLASH_IO1 FLASH_IO2 FLASH_IO3 FLASH_IO4 FLASH_IO5 FLASH_IO6 FLASH_IO7

USD_CS SPI_SIMO

SPI_SCLK SPI_SOMI

VBUS USB_DM USB_DP

PUR

VUSB

5 4 3 2 1

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Title

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Date: Sheet of 75

ADS1x9xECG FE A

MSP430

Thursday, August 04, 2011

VCC

GND

TP28

C66 220nF

TP29

TP50

R24 NI

DNI

R95

10K

R58

47K

C86 1uF

C13

0.1uF

SMLE12BC7TT86

C34 10uF

TP45

ABM3B-24.000MHZ

TP26

C32 470nF

R113 0E

R83 NI

R56 130E

C65 10uF

C35 10uF

BLM21PG220SN1B

R57 220E

C25 10pF

MMBT5089LT1G

TP9

TP18

ABS07-32.768KHZ-T

C30

12pF

R20 33E

TP21

SMLE12EC6TT86

C21 10pF

P6_4/CB4/A4

P6_5/CB5/A5

P6_6/CB6/A6

P6_7/CB7/A7

P7_0/CB8/A12

P7_1/CB9/A13

P7_2/CB10/A14

P7_3/CB11/A15

P5_0/A8/VREF+/VEREF+

P5_1/A9/VREFN/VEREFN

AVCC1

P5_4/XIN

P5_5/XOUT

AVSS1

P8_0

P8_1

P8_2

DVCC1

DVSS1

VCORE

P3_4/UCA0RXD/UCA0SOMI

P3_5/TB0_5

P3_6/TB0_6

P3_7/TB0OUTH/SVMOUT

P4_0/PM_UCB1STE/PM_UCA1CLK

P4_1/PM_UCB1SIMO/PM_UCB1SDA

P4_2/PM_UCB1SOMI/PM_UCB1SCL

P4_3/PM_UCB1CLK/PM_UCA1STE

DVSS2

DVCC2

P4_4/PM_UCA1TXD/PM_UCA1SIMO

P4_5/PM_UCA1RXD/PM_UCA1SOMI

P4_6/PM_NONE

P4_7/PM_NONE

P5_6/TB0_0

P5_7/TB0_1

P7_4/TB0_2

P7_5/TB0_3

P7_6/TB0_4

P7_7/TB0CLK/MCLK

VSSU

PU_0/DP

PUR

PU_1/DM

VBUS66VUSB

V18

AVSS2

P5_2/XT2IN

P5_3/XT2OUT

TEST/SBWTCK

PJ_0/TDO

PJ_1/TDI/TCLK

PJ_2/TMS

PJ_3/TCK

RST/NMI/SBWTDIO

P6_0/CB0/A078P6_1/CB1/A179P6_2/CB2/A280P6_3/CB3/A3

P1_0/TA0CLK/ACLK22P1_1/TA0_023P1_2/TA0_124P1_3/TA0_225P1_4/TA0_326P1_5/TA0_427P1_6/TA1CLK/CBOUT28P1_7/TA1_031P2_2/TA2CLK/SMCLK30P2_1/TA1_229P2_0/TA1_132P2_3/TA2_033P2_4/TA2_134P2_5/TA2_235P2_6/RTCCLK/DMAE036P2_7/UCB0STE/UCA0CLK37P3_0/UCB0SIMO/UCB0SDA38P3_1/UCB0SOMI/UCB0SCL39P3_2/UCB0CLK/UCA0STE40P3_3/UCA0TXD/UCA0SIMO

MSP430F5529IPNR

BLM21PG220SN1B

SW4

EVQ-21505R

TP40

GND

VCCA

VCCB

TXS0102DCTR

C29

12pF

C83 NI

DNI

C85 10uF

C84

0.1uF

TP43

R84

TP39

TP23

R18

10K

C31

0.1uF

C67

0.1uF

TP27

SW2

KT11P2SM34LFS

R19

10K

R49

C76

0.1uF

C17 220nF

C33

0.1uF

GND

I/O

CLK

VCC

851-93-006-20-001000

R40

MSP_DVDD

MSP_AVDD

MSP_DVDD

VCC_3_3

MSP_DVDD

VCC_3_3

FLASH_IO4 FLASH_IO5 FLASH_IO6 FLASH_IO7

FLASH_IO0 FLASH_IO1 FLASH_IO2 FLASH_IO3

FLASH_CE FLASH_CLE FLASH_ALE FLASH_WE FLASH_RE

PUR

VBUS

USB_DM

USB_DP

SPI_SCLK

ADC_SCLK

ADC_RESET ADC_START

ADC_DRDY

FLASH_RB

ADC_GPIO2 ADC_GPIO1 ADC_CLK_SCL

ADC_CLK

BAT_SCL BAT_SDA

STAT2 STAT1

BT_RX

BT_TX

BT_SLOW_CLK

BT_NSHUTDOWN

FLASH_RB2

FLASH_CE2

ADC_CS

POW_CE

SYS_RESET

VUSB

SPI_SIMO

SPI_SOMI

BT_CTS

USD_CS

BT_CS1 BT_RTS

SBWTDIO

SBWTCLK

TCK

KEY2

KEY1

TMS

XT2IN TDI

XT2OUT

TDO

LED2

XOUT

LED1

XIN

SBWTCLK

TCK

KEY2

KEY1

TMS

XT2IN

TDI

XT2OUT

TDO

LED2

LED1

SBWTDIO

ADC_DOUT

ADC_DIN

3.3V Voltage Supervisor

3.3V Power Supply

Battery Fuel Gauge

Battery Management

DNI

5 4 3 2 1

12345

Title

Size Document Number Rev

Date: Sheet of 7

ADS1x9xECG FE A

Power Supply

Thursday, August 04, 2011

DNI

C74 NI

C70

10uF

R52

10K

TP22

TP48

TP20

R31 10K

TP60

R89

R112

10E

R91 NI

C68 22uF

TP49

R114 0E

SSW-103-02-S-S-RA

R39 NI

DNI

C77

0.1uF

R53 10K

BAT_P

BAT_M

TP51

C79 NI

C81

2.2uF

VDD

MR#

RESET

GND

RESET#

U18

TPS3825

C80 NI

C82

2.2uF

R51 0E

C28

0.1uF

R50

33K

R29 10K

R47 NI

R33

10K

R92 NI

C26 NI

R38 10K

LDO

STAT1

STAT2

BAT1

BAT2

ISET2

PSEL

ISET1

VSS

OUT3

OUT2

OUT1

ACPG#

USBPG#_/_VBSEL

DPPM

TMR

USB

BQ24032ARHLR

R48

10K

R103

R28 NI

DNI

R115

100E

TP25

C75

0.01uF

TP17

R42 NI

DNI

R87

C20

R104

4.7K

RBI

VCC

VSS

SCL

SDA

BAT

SRN

SRP

GPIO

PGM

VSS1

U17

C73 NI

C44

0.1uF

R88

C72

0.1uF

R111

R43

GND

EN4NR

OUT

U16

TPS73033

R96 NI

R90

R97

SW3

KT11P2SM34LFS

C16

R108

TP13

TP31

R30 10K

C27

1uF

VCC_3_3

AVSS

VCC_BAT

ADS_AVDD

VBUS

STAT2 STAT1

BAT_SDA

BAT_SCL

SYS_RESET

POW_CE

PSEL

ISET2

ISET1

ACPG POW_CE

STAT2

PACK_PPACK_P

STAT1

USBPG

PSEL

ISET2

ISET1ACPG

POW_CE

STAT2

PACK_P

STAT1

USBPG

R86 R13

Mount

Do Not When PANI315 Bluetooth module is used

When A1101R09A Bluetooth module is used

Mount

Do Not Mount

Description

(Default)

5 4 3 2 1

12345

Title

Size Document Number Rev

Date: Sheet of 7

Bluetooth Module

AADS1x9xECG FE

Thursday, August 04, 2011

DNI

C1 NI

TP6

R22

C59

C57 NI

TP4

C12 NI

TP1

GND

IO2

IO1

SLOW_CLK_IN

HCI_TX

HCI_RX

HCI_RTS

HCI_CTS

AUD_FSYNC

AUD_CLK

AUD_IN

AUD_OUT

TX_DBG

GND

MLDO_OUT

MLDO_IN

CL1_5_LDO_IN

VDD_IO

NSHUTD

I2C_SCL

I2C_SDA

GND20GND

R81

1.8V

OUT

NC1

GND5NC2

U13

R13 NI

DNI

R3 NI

R86 NI

R78 NI

TP44

DIR1

DIR2

OE#

VCCA

DIR3

DIR4

VCCB

GND

TP2

R74

TP8

C61 NI

C55

C54

C51 NI

R17

ANT1

C11

TP7

DNC1

DNC2

DNC3

NC1

NC2

NC3

SCLK

VDD

NC4

NC6

NC5

DNC6

DNC5

DNC4

VDCOUP1

MISO/GDO1

MOSI

CS#

GDO0

GDO2

VDCOUP2

GND17GND

U12

R6 NI

TP3

R15 NI

R80 NI

C3 NI

DIR

VCCA8VCCB

GND

TP35

R79

R25

TP5

VCC_3_3

VCC_1_8

VCC_1_8VCC_3_3

VCC_1_8 VCC_3_3

VCC_1_8

VCC_3_3

BT_TX BT_RTS BT_RX

BT_NSHUTDOWN

BT_SLOW_CLK

SPI_SIMO

SPI_SOMI

BT_CS1 SPI_SCLK

BT_CTS

PAN_RX

PAN_TX

SLOW_CLK

PAN_CTS

SHUTDOWN

PAN_RTS

GDO2

PAN_RX

BT_IN_CTS

PAN_TX

SLOW_CLK

PAN_CTS

SHUTDOWN

PAN_RTS

GDO2

BT_IN_CTS

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Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES

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Texas Instruments ADS1x9xECG-FE User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual