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Evaluation of the ADS1298R Respiration Function

43

SBAU181B – March 2011 – Revised Janurary 2016

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Copyright © 2011–2016, Texas Instruments Incorporated

ADS1298R

Figure 37. Channel 1

Δ

Impedance Measurement

Figure 38. Results After Low-Pass Filtering

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Summary of Contents for ADS1298RECG-FE

Page 1: ...ADS1298RECG FE ECG Front End Performance Demonstration Kit User s Guide Literature Number SBAU181B March 2011 Revised Janurary 2016 ...

Page 2: ...98RECG FE Input Signals 35 4 1 Input Short Testing 35 4 2 Internal Test Signals Input 35 4 3 Temperature Sensor 36 4 4 Normal Electrode Input 37 4 5 MVDD Input RLD Measurement RLD Positive Electrode Driver and RLD Negative Electrode Driver 37 4 6 Lead Derivation 38 4 7 Wilson Center Terminal WCT 38 4 8 Right Leg Drive 38 4 9 PACE Detection 39 5 Evaluation of the ADS1298R Respiration Function 41 5 ...

Page 3: ...ts Incorporated Contents A 3 ECG Cable Details 53 A 4 Bill of Materials 55 Appendix B External Optional Hardware 57 B 1 Optional External Hardware Not Included 57 B 2 ADS1298R Power Supply Recommendations 59 Appendix C Software Installation 60 C 1 Minimum Requirements 60 C 2 Installing the Software 60 Revision History 61 ...

Page 4: ... ECG Channels 26 22 FFT Graph of Normal Electrode Configuration 27 23 AC Analysis Parameters Windowing Options 27 24 FFT Analysis Input Short Condition 28 25 Changing the User Defined Dynamic Range for Channel 1 28 26 FFT Plot Using Zoom Tool 29 27 ECG Display Tab Showing LEAD I III and Augmented Leads 31 28 ECG Signal Zoom Feature for Six Leads 32 29 ECG Signal Zoom Feature for Lead 1 32 30 Save ...

Page 5: ...es 48 15 Pin Shielded Connector from Biometric Cables 57 49 15 Pin Twisted Wire Cable to Banana Jacks 57 50 15 Pin Twisted Wire Cable 57 51 Cardiosim ECG Simulator Tool 58 52 Recommended Power Supply for ADS1298R 59 53 Initialization of ADS1298R 60 54 License Agreement 60 55 Installation Process 61 56 Completion of ADS1298R Software Installation 61 ...

Page 6: ...tion 11 2 ADS1298R Lead Measurements 38 3 Derived Lead Calculations 38 4 RLD Jumper Options 39 5 ADS1298RECG FE Default Jumper Switch Configuration 46 6 Power Supply Test Points 48 7 Analog Supply Configurations AVDD AVSS 48 8 Digital Supply Configurations DVDD DGND 49 9 CLK Jumper Options 49 10 External Reference Jumper Options 49 11 Test Signals 50 12 Serial Interface Pinout 50 13 Bill of Materi...

Page 7: ...w 1 1 Important Disclaimer Information CAUTION NOTICE The ADS1298R is 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 ADS1298R is to be used only under these conditions The ADS1298R is intended only for electrical evaluation of the features of the ADS1298R dev...

Page 8: ...anual shows how to use the MMB0 as part of the ADS1298R but does not provide technical details about the MMB0 itself Throughout this document the abbreviation EVM and the term evaluation module are synonymous with the ADS1298RECG FE 1 3 Supported Features Hardware Features Configurable for bipolar or unipolar supply operation Configurable for internal and external clock and reference via jumper se...

Page 9: ... algorithms Software PACE detection algorithms 1 5 ADS1298R Hardware Figure 1 shows the hardware included in the ADS1298R kit Contact the factory if any component is missing The latest software is available on the TI website at http www ti com you should verify that you have the latest software before using the device Figure 1 ADS1298R Kit The complete kit includes the following items ADS1298R ECG...

Page 10: ...ction provides a QuickStart guide to quickly begin evaluating the EVM using the ADS1298RECG FE software 2 1 Default Jumper Switch Configuration Figure 2 shows the jumpers found on the ADS1298RECG FE EVM and the respective factory default conditions for each Figure 2 ADS1298RECG FE Default Jumper Locations Table 1 lists the jumpers and switches and the factory default conditions ...

Page 11: ...nstalled 1 2 CLKSEL set to 0 JP24 Installed 2 3 DVDD supply 3 3V JP25 Header Not Installed No external reference selected JP26 Installed 1 2 top WCT connected to CH8 input Installed 3 4 bottom ECG_V1 connected to CH8 input JP27 Installed 1 2 top WCT connected to CH7 input Installed 3 4 bottom ECG_V5 connected to CH7 input JP28 Installed 1 2 top WCT connected to CH6 input Installed 3 4 bottom ECG_V...

Page 12: ... that these settings are the factory configured settings for the board 2 Verify that the jumpers on the MMB0 motherboard are configured as shown below MMB0 J13A Open MMB0 J13B Open Refer to Appendix B2 for details about the MMB0 power supply 3 Install the ADS1298RECG FE software using the latest software version The latest software can be downloaded from the ADS1298RECG FE product page Double clic...

Page 13: ...ting UI screen of the software The UI consists of a user menu Section 3 1 a few top level controls Section 3 2 and a tabbed interface with different functions available on the different tabs The tabs are About Section 3 3 ADC Register Section 3 4 3 Analysis Section 3 5 Save Section 3 6 Figure 3 Software Start Screen About Tab The user can adjust the settings when the software is not acquiring data...

Page 14: ...ses the application Help Menu see Figure 5 The Help menu provides the About option which display the software and firmware version that is currently being used Please have this information if you need to request assistance or have a question regarding the software or hardware Figure 4 User Menu File Item Figure 5 User Menu Help Item 3 2 Top Level Application Controls Several controls indicators ar...

Page 15: ... data input referred while not checking displays the data as converted The Show Poll Lead Off Status displays a window see Figure 7 that shows the status of the Lead Off status registers LOFF STATP and LOFF STATN of the ADS1298R When the lead for the channel is disconnected the corresponding channel LED changes from green to red Figure 7 Lead Off Status Registers Display Window 3 3 About Tab The A...

Page 16: ...vide the control registers into different functions groups The sub tabs are Channel Registers tab Section 3 4 2 LOFF and RLD tab Section 3 3 GPIO and Other Registers tab Section 3 4 4 Register Map tab Section 3 4 5 Figure 8 Channel Registers Tab 3 4 1 Standby and Reset Controls The Standby control allows the user to place the ADS1298R in standby The Reset control allows the user to reset the ADS12...

Page 17: ... control of these registers Configuration Register 1 enables the user to control the resolution mode enable the daisy chain configuration options and program the data rate Configuration Register 2 enables the user to select an internal square wave test source amplitude of 1mV or 2mV and a frequency of DC 2Hz fCLK 221 or 4Hz fCLK 220 Configuration Register 3 controls the bandgap reference illustrat...

Page 18: ...Filter AVDD AVSS 2 Using the ADS1298RECG FE Software www ti com 18 SBAU181B March 2011 Revised Janurary 2016 Submit Documentation Feedback Copyright 2011 2016 Texas Instruments Incorporated ADS1298R 3 4 2 2 Channel Control Registers The Channel Control Registers box allows the user to uniquely configure the front end MUX for each ADC channel Additionally at the top of the Channel Control Registers...

Page 19: ...tion is enabled for each channel individually and for each input positive and negative Set All LOFFP Bits and Set All LOFFN Bits allow the user to turn on or off all the enable bits at once instead of clicking each individual channel control The third array of controls Lead Off Current Direction determines the current direction used for lead off detection when an excitation signal is selected as a...

Page 20: ...s to configure the lead off threshold Figure 13 illustrates the connections from the positive and negative inputs to the lead off comparators The output of the comparators is viewed by using Show Poll Lead Off Status control as described in Section 3 2 Figure 13 LOFF_STATP and LOFF_STATN Comparators 3 4 3 2 Right Leg Drive Derivation Control Registers The Right Leg Drive Derivation Control Registe...

Page 21: ... If the output is selected the GPIODx control is enabled allowing the user to set the value to output If the GPIO is selected as an input the GPIODx control is disabled and shows the value of the GPIO If any of the GPIOs are selected as inputs the Read GPIO control is enabled which allows the GPIODx values to be updated to the current GPIO value The PACE Detect Register does not enable a special P...

Page 22: ...d Janurary 2016 Submit Documentation Feedback Copyright 2011 2016 Texas Instruments Incorporated ADS1298R 3 4 4 1 Wilson Central and Augmented Lead Registers The Wilson Central Voltage an average voltage between the right arm RA left arm LA and left leg LL connections can be derived from any combination of positive and negative terminals from channels 1 4 and routed to the WCT pin Likewise the Aug...

Page 23: ...nts Incorporated ADS1298R 3 4 5 Register Map ADC Register The Register Map tab is a helpful debug feature that allows the user to view the state of all the internal registers This tab is illustrated in Figure 16 Refresh Registers control updates the register map values with the current register settings of the ADS1298R Figure 16 Device Registers Settings ...

Page 24: ...5 5 3 5 1 Scope Tab Analysis The Scope tool is useful for examining the exact amplitude of the measured input signals from each channel Additionally users can determine the noise contribution from each channel at a given resolution and review the sampling rate the PGA gain and the input signal amplitude Figure 17 illustrates the Scope tool features Figure 17 Scope Tool Features In the Scope Analys...

Page 25: ...1 Zoom Tool The zoom tool allows the user to zoom in either on all channels simultaneously or on a single channel Figure 19 shows an example of the waveform examination tool with the magnifying glass zoomed in on Channel 2 In this case the tool makes it much easier to determine that the noise seen on the ECG waveform is a result of 50Hz 60Hz line cycle noise Figure 19 Zoom Tool Options ...

Page 26: ...ics Figure 20 illustrates the histogram output for a 12 lead signal The same ECG Signal Zoom analysis may be used on the histogram plots for a more detailed examination of the amplitude bins Figure 20 Histogram Bins for 12 Lead ECG Signal Figure 21 shows the Histogram Analysis window that is displayed when the Histogram Analysis button at the bottom of the screen in Figure 20 is clicked The analys...

Page 27: ...DS1298R NWINDOW is the number of odd integer cycles during a given sampling period NTOTAL is the number of data points in powers of 2 that is used to create the FFT If the conditions for coherent sampling can be met the FFT results for a periodic signal will be optimized The Ideal AIN Frequency is a value that is calculated based on the sampling rate such that the coherent sampling criteria can be...

Page 28: ...noise Figure 24 FFT Analysis Input Short Condition 4 User Defined Dynamic Range This section enables the user to examine the SNR of a specific channel within a given frequency band defined by Low Frequency and High Frequency The SNR displayed in this window shows under the Dynamic Range heading as Figure 25 illustrates Figure 25 Changing the User Defined Dynamic Range for Channel 1 5 Input Amplitu...

Page 29: ... com Using the ADS1298RECG FE Software 29 SBAU181B March 2011 Revised Janurary 2016 Submit Documentation Feedback Copyright 2011 2016 Texas Instruments Incorporated ADS1298R Figure 26 FFT Plot Using Zoom Tool ...

Page 30: ...rols implement a low pass digital filter on the collected data The filter is enabled using the Enable control and Filter Order and Cutoff Frequency allow for the customization of the filter The High Pass Filter group of controls implement a digital high pass filter on the collected data The high pass controls function the same as the low pass controls except that they apply to the high pass filter...

Page 31: ...gmented Leads displays LEAD I LEAD II LEAD III aVR aVL and AVF signals Chest Leads displays V1 V6 signals NOTE For display that shows 6 leads combined the ECG signals have any DC offset removed and a different offset added to the signal to display the signals as shown To see the raw ECG data you can select the individual signals as described below in the Zoom feature box 4 2 ECG Separation Feature...

Page 32: ...req controls in the high pass filter part of the Post Processing Filters group right side of the box NOTE The digital filters are not part of the ADS1298R These are digital filters implemented in the UI to aid in the evaluation of the ADS1298RECG FE 4 Zoom Feature The zoom feature is available to allow the user to navigate and view all signals at the same time as shown in Figure 28 This tool allow...

Page 33: ...will be saved if the corresponding checkbox is checked The Data to Save group allows the user to save the various data sets collected from the ADS1298R The CH x controls allow the user to specify which channels will be saved for each of the data selections made Data Codes selects the raw data in codes format to be saved to a file Data Volts selects the raw data converted to voltage to be saved to ...

Page 34: ...Using the ADS1298RECG FE Software www ti com 34 SBAU181B March 2011 Revised Janurary 2016 Submit Documentation Feedback Copyright 2011 2016 Texas Instruments Incorporated ADS1298R Figure 30 Save Tab ...

Page 35: ...ls to an internal short with a data rate of 500SPS and a PGA gain of 6 Once the Acquire button is pressed the Scope Analysis should reflect input referred VPP values less than 5µVPP 4 2 Internal Test Signals Input Configuration Register 2 controls the signal amplitude and frequency of an internally generated square wave test signal The primary purpose of this test signal is to verify the functiona...

Page 36: ...ensor input the ADC internal temperature is calculated from the ADC output voltage using Equation 1 Figure 32 Internal Temperature Sensor 1 The ADC can be configured to give a temperature reading by selecting the Temperature Sensor option on the Channel Control Registers GUI see Section 3 4 2 2 and verified using the Scope tab as shown in Figure 33 The number 0 1447V on the y axis can be calculate...

Page 37: ...the EVM through the DB15 connector J1 Refer to Section A 3 for the ECG cable details The ECG electrode signals are passed through a single pole RC filter followed by the lead configuration For ECG signal processing the electrode signals are routed through J5 to the ADS1298R input The signal path in the board can be chosen by jumper settings depending on the application 4 5 MVDD Input RLD Measureme...

Page 38: ...ated by the ADS1298R device The WCT1 and WCT2 registers provide controls to select any of the eight inputs CH1P to CH4P CH1M to CH4M for routing to the three integrated WCT amplifiers The ADS1298RECG FE is configured for 12 lead ECG inputs with the limb electrodes connected as shown in Table 2 During EVM power up the firmware configures the device to route CH2P CH2M and CH3P RA LA LL to the intern...

Page 39: ... mid supply This measurement confirms whether the RLD loop is functional The on chip RLD signal can be fed back into the ADS1298R by shorting JP1 This RLD signal can then be sent to the ADC to measure for debug purposes or to other electrodes for driving to change the reference drive in case the RL electrode falls off Refer to the ADS1298R product data sheet for additional details 4 8 2 Driving th...

Page 40: ...created by a Fluke Medsim 300B processed by the ADS1298R at a data rate of 8kSPS Using higher data rates increases power consumption because all channels must sample at this data rate simultaneously thus the PACE buffers offer the flexibility to process PACE signals separately from the ADS1298R The signal must be AC coupled to obtain the waveform shown below Figure 35 Digitization of PACE Signal U...

Page 41: ...to generate the respiration signal is within the red dotted box By default jumpers JP34 and JP35 connect the onboard circuitry for respiration evaluation R77 models the baseline impedance of the thoracic cavity This component is a surface mount resistor located on the underside of the board it can be changed if desired R78 and R79 model the cable resistance typically 1kΩ for patient monitoring Cap...

Page 42: ...ion with an internal clock set the following Configuration Register 4 Respiration Frequency to 32kHz CHxSET registers Normal Electrode Gain to 6 RESP register set to Respiration Demodulation to Enabled Respiration Modulation to Enabled VREF to VREFP Respiration Phase to 112 5 deg Respiration Control to Internal Respiration with Internal Clock Next switch U11 must be toggled at the desired respirat...

Page 43: ...espiration Function 43 SBAU181B March 2011 Revised Janurary 2016 Submit Documentation Feedback Copyright 2011 2016 Texas Instruments Incorporated ADS1298R Figure 37 Channel 1 Δ Impedance Measurement Figure 38 Results After Low Pass Filtering ...

Page 44: ... be configured to the software default configuration see Section 3 4 1 for further details on software default configuration For internal respiration with an internal clock set the following Channel Control Registers control Channel Input to Normal Electrode Gain to 6 Configuration Register 4 Respiration Frequency to 32kHz Pulse Mode Enabled to Disable Lead off Comparator Power down to Enable RESP...

Page 45: ...Incorporated ADS1298R Figure 39 and Figure 40 show the results with RB 500Ω and ΔR 1Ω and with RB 500Ω and ΔR 0 1Ω respectively Figure 39 Channel 1 Result for RB 500Ω and ΔR 1Ω Figure 40 Channel 1 Result for RB 500Ω and ΔR 0 1Ω These two approaches to performing respiration measurements show that the internal respiration circuitry of the ADS1298R can resolve down to 100mΩ ...

Page 46: ...drive amplifiers Figure 41 shows the functional block diagram with important jumper names for the EVM Figure 41 ADS1298R Front End Block Diagram 6 1 Jumper Description Table 5 shows the jumpers on the ADS1298RECG FE and options available for each jumper 1 Requires installation of JP25 and references U3 U4 Table 5 ADS1298RECG FE Default Jumper Switch Configuration Jumper Function Settings JP1 Insta...

Page 47: ...equires JP16 to be installed 3 4 CH7 connection Open Channel input not connected Installed Channel input connected to ECG_V5 JP28 1 2 CH6 connection Open Channel input not connected Installed Channel input connected to WCT requires JP16 to be installed 3 4 CH6 connection Open Channel input not connected Installed Channel input connected to ECG_V4 JP29 1 2 CH5 connection Open Channel input not conn...

Page 48: ...r operation The ADS1298REVM power consumption can be measured by removing the JP4 jumper and JP24 jumper to connect an ammeter By shorting JP5 the ADS1298R can be placed in powerdown mode for low power consumption Test points TP5 TP6 TP7 TP8 TP9 TP10 and TP14 are provided to verify that the host power supplies are correct The corresponding voltages are shown in Table 6 Table 6 Power Supply Test Po...

Page 49: ...18E 2 048 is a possible oscillator for 1 8V DVDD operation The EVM is shipped with the external oscillator enabled 6 4 Reference The ADS1298R has an on chip internal reference circuit that provides reference voltages to the device Alternatively the internal reference can be powered down and VREFP can be applied externally This configuration is achieved with the external reference generators U3 and...

Page 50: ...e GPIO signals and some of the control signals are available at connector J3 These signals are used to interface to the MMB0 board DSP The pinout for this connector is given in Table 12 Table 12 Serial Interface Pinout Signal J3 Pin Number Signal START CS 1 2 CLKSEL CLK 3 4 GND NC 5 6 GPIO1 CS 7 8 RESETB NC 9 10 GND DIN 11 12 GPIO2 DOUT 13 14 NC START DRDYB 15 16 SCL NC 17 18 GND NC 19 20 SDA 6 7 ...

Page 51: ...fer to the ADS1298R product data sheet for the common mode range for various programmable gain amplifier PGA gain settings Section 4 4 1 explains the process used to capture 12 lead ECG data Figure 42 Fluke Simulator Configuration 6 7 2 Arbitrary Input Signals Arbitrary input signals can be connected to the ADS1298R by bypassing the DB15 connector and feeding the signal directly at jumpers JP26 JP...

Page 52: ...016 BOM Layout and Schematics This section contains the complete bill of materials printed circuit board PCB layouts and schematic diagrams for the ADS1298R NOTE Board layouts are not to scale These are intended to show how the board is laid out they are not intended to be used for manufacturing ADS1298R PCBs A 1 ADS1298R Front End Board Schematics The ADS1298R schematic is appended to this docume...

Page 53: ...gure 43 Top Component Placement Figure 44 Bottom Component Placement and Routing Figure 45 Internal Ground Plane Layer 2 Figure 46 Internal Power Plane Layer 3 A 3 ECG Cable Details Figure 47 shows the details of the recommended ECG cable Cable details 10 lead ECG cable for Philips HP snap button Part No 010302013 http www biometriccables com index php productID 692 10 lead ECG cable for Philips H...

Page 54: ...11 Revised Janurary 2016 Submit Documentation Feedback Copyright 2011 2016 Texas Instruments Incorporated BOM Layout and Schematics Another compatible cable for the ADS1298R HP Philips Agilent compatible 10 lead ECG cable Figure 47 ECG Cable Schematic ...

Page 55: ...37 Not installed 10 0 C39 Not installed 11 4 C53 C59 C63 C64 Capacitor ceramic 2 2µF 6 3V 10 X5R 0603 Murata GRM185R60J225KE26D 12 2 C68 C71 Capacitor ceramic 100µF 10V 20 X5R 1210 Taiyo Yuden LMK325BJ107MM T 13 1 C90 Capacitor ceramic 1000pF 50V 5 C0G 0603 Murata GRM1885C1H102JA01D 14 2 C97 C98 Capacitor ceramic 560pF 50V 5 C0G 0603 Murata GRM1885C1H561JA01D 15 4 C99 C100 C108 C109 Capacitor cera...

Page 56: ...603FR 0746K4L 41 1 R76 Resistor 1 00MΩ 1 8W 1 0805 SMD Yageo RC0805FR 071ML 42 1 R77 Resistor 330Ω 1 8W 1 0805 SMD Yageo RC0805FR 07330RL 43 2 R78 R79 Resistor 1 00kΩ 1 10W 1 0603 SMD Yageo RC0603FR 071KL 44 5 R8 R80 R81 R82 R83 Resistor 1 00MΩ 1 10W 1 0603 SMD Yageo RC0603FR 071ML 45 4 R84 R85 R86 R87 Resistor 10 0MΩ 1 10W 1 0603 SMD Yageo RC0603FR 0710ML 46 2 R96 R97 Resistor 40 2kΩ 1 10W 1 0603...

Page 57: ...l External Hardware Not Included The input of the ADS1298R requires a DB15 connector Figure 48 illustrates the most optimal cable connection to the ADS1298R Figure 49 and Figure 50 show two alternate ways that cables can be constructed to interface with the ADS1298R Figure 51 shows an alternate testing tool to the instrument used in the tests for this user guide refer to Section 6 7 1 Figure 48 15...

Page 58: ...arch 2011 Revised Janurary 2016 Submit Documentation Feedback Copyright 2011 2016 Texas Instruments Incorporated External Optional Hardware Figure 49 15 Pin Twisted Wire Cable to Banana Jacks Figure 50 15 Pin Twisted Wire Cable Figure 51 Cardiosim ECG Simulator Tool ...

Page 59: ... Output connector barrel plug positive center 2 5 mm I D x 5 5 mm O D 9 mm insertion depth Complies with applicable regional safety standards Figure 52 shows a 6V power supply cable not provided in the EVM kit connected to a battery pack with four 1 5V batteries connected in series Connecting to a wall powered source makes the ADS1298R more susceptible to 50Hz 60Hz noise pickup therefore for best ...

Page 60: ...ed Mouse or other pointing device 1280 x 960 minimum display resolution C 2 Installing the Software CAUTION Do not connect the ADS1298R before installing the software on a suitable PC Failure to observe this caution may cause Microsoft Windows to not recognize the ADS1298R The latest software is available from the ADS1298RECGFE PDK product folder on the TI web site Check the TI web site regularly ...

Page 61: ...anges from A Revision September 2012 to B Revision Page Deleted power adapter from Figure 1 9 Deleted bullet in Section 1 5 Universal AC to DC wall adapter 9 Changed No additional power connections are required in Section 2 2 to Refer to Appendix B2 for details about the MMB0 power supply 12 Added new paragraph to Section B 2 If you chose to power the MMB0 board through the wall adapter jack 59 De...

Page 62: ..._V2 ELEC_V3 ELEC_V4 ELEC_V5 ELEC_V6 ELEC_RA ELEC_LA ELEC_LL ELEC_V1 ELEC_RL JP15 ELEC_SHD ECG_V2 ECG_V3 ECG_V4 ECG_V5 ECG_V6 ECG_LA ECG_RA ECG_LL ECG_RL ECG_V1 ECG_SHD_DRV 1 5 C85 NI AVSS AVDD R31 NI R32 NI C89 NI AVSS AVDD R35 NI R36 NI C79 NI AVSS AVDD R27 NI R28 NI C87 NI AVSS AVDD R41 NI R42 NI C78 NI AVSS AVDD R11 NI R12 NI C81 NI AVSS AVDD R15 NI R16 NI C25 NI AVSS AVDD R45 NI R46 NI C27 NI ...

Page 63: ..._V1 PACEOUT2 PACEOUT1 PACEOUT2 PACEOUT1 PWDNB DAISY_IN GPIO3 GPIO4 DAISY_IN GPIO3 GPIO4 DAISY_IN 1 2 3 4 5 6 7 8 9 10 J5 NI JP18 EXT_CLK EXT_CLK A1 A3 A4 A5 A6 A7 A8 B1 B2 B3 B4 B5 B6 B7 B8 C1 C2 C3 C4 C5 C6 C7 C8 D1 D2 D3 D4 D5 D6 D7 D8 E1 E2 E3 E4 E5 E6 E7 E8 F1 F2 F3 F4 F5 F6 F7 F8 G1 G2 G3 G4 G5 G6 G7 G8 H1 H2 H3 H4 H5 H6 H7 H8 A2 U1 ADS1298R RESP_MOD_N C109 2200pF C108 2200pF C111 NI C110 NI ...

Page 64: ... C 1 N C 7 N C 8 U4 NI R51 NI VREFP R50 NI C40 NI 3 2 6 7 4 8 U5 NI Optional External Reference C36 NI AVDD AVDD AVSS AVSS R47 NI C37 NI C38 NI C39 NI R48 NI C42 NI C41 NI R49 NI JP3 NI External Reference C44 NI VIN 2 GND 4 OUT 6 TRIM 5 TEMP 3 N C 1 N C 7 N C 8 U3 NI C34 NI AVDD AVSS C43 NI C35 NI AVSS AVSS NOT INSTALLED 3 5 B Tom Hendrick Tom Hendrick AGND AGND ADS1298R ECG FE 6522881 JP25 NI ...

Page 65: ... TP5 VCC_ 5v AVSS C63 2 2uF C67 NI C64 2 2uF L4 3 3uH C66 10uF TP6 C54 10uF C65 10uF ECG Power Supplies C57 0 1uF R52 47 5K R53 43 2K JP20 EN 3 NR FB 4 OUT 5 GND 2 IN 1 U7 TPS73230 R54 NI R55 NI C62 NI C59 2 2uF L5 3 3uH C61 10uF C60 10uF EN 3 NR FB 4 OUT 5 GND 2 IN 1 U9 TPS73201 R56 49 9K R57 46 4K C58 1uF TP13 EN 3 NR FB 4 OUT 5 IN 2 GND 1 U8 TPS72301 4 5 B Tom Hendrick Tom Hendrick AGND AGND AG...

Page 66: ... VCC_3 3V R74 0 ADS1298R ECG FE A0 1 A1 2 GND 4 SDA 5 SCL 6 WP 7 VCC 8 A2 3 U10 24AA256 I ST C94 0 1uF VCC_3 3V R68 NI VCC_3 3V R69 NI R70 NI R71 0 R72 0 R73 0 SCL SDA R75 10k 1 2 3 4 5 6 7 8 9 10 J4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 J2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 J3 DVDD 6522881 GND 14 P1 0 2 1 5 7 VCC 1 1 1 3 1 3 5 1 7 9 TCK 11 P2 6 13 1 2 4 1 4 6 1 6 8 TD...

Page 67: ...ring the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repair such EVM or provide replacements Repaired EVMs shall be warranted for the remainder of the original warranty period Replaced EVMs shall be warranted for a new full ninety 90 day warranty period 3 ...

Page 68: ... by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated Antenna types not included in this list having a gain greater than the maximum gain indicated for that type are strictly prohibited for use with this device Concernant les EVMs avec antennes détachables Conformément à la rég...

Page 69: ... connecting any load to the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal operation even with the inputs and outputs kept within the specified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pass transistors cu...

Page 70: ...F REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE LOSS OF DATA OR BUSINESS INTERRUPTION NO CLAIM SUIT OR ACTION SHALL BE BROUGHT AGAINST TI MORE THAN ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED 8 2 Specific Limitations IN NO EVENT SHALL T...

Page 71: ...esponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failur...

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