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4

EVM Use Restrictions and Warnings:

4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT

LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS.

4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling

or using the EVM, including without limitation any warning or restriction notices. The notices contain important safety information
related to, for example, temperatures and voltages.

4.3

Safety-Related Warnings and Restrictions:

4.3.1

User shall operate the EVM within TI’s recommended specifications and environmental considerations stated in the user
guide, other available documentation provided by TI, and any other applicable requirements and employ reasonable and
customary safeguards. Exceeding the specified performance ratings and specifications (including but not limited to input
and output voltage, current, power, and environmental ranges) for the EVM may cause personal injury or death, or
property damage. If there are questions concerning performance ratings and specifications, User should contact a TI
field representative prior to connecting interface electronics including input power and intended loads. Any loads applied
outside of the specified output range may also result in unintended and/or inaccurate operation and/or possible
permanent damage to the EVM and/or interface electronics. Please consult the EVM user guide prior to 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, current sense resistors, and heat sinks, which can be identified using the
information in the associated documentation. When working with the EVM, please be aware that the EVM may become
very warm.

4.3.2

EVMs are intended solely for use by technically qualified, professional electronics experts who are familiar with the
dangers and application risks associated with handling electrical mechanical components, systems, and subsystems.
User assumes all responsibility and liability for proper and safe handling and use of the EVM by User or its employees,
affiliates, contractors or designees. User assumes all responsibility and liability to ensure that any interfaces (electronic
and/or mechanical) between the EVM and any human body are designed with suitable isolation and means to safely
limit accessible leakage currents to minimize the risk of electrical shock hazard. User assumes all responsibility and
liability for any improper or unsafe handling or use of the EVM by User or its employees, affiliates, contractors or
designees.

4.4 User assumes all responsibility and liability to determine whether the EVM is subject to any applicable international, federal,

state, or local laws and regulations related to User’s handling and use of the EVM and, if applicable, User assumes all
responsibility and liability for compliance in all respects with such laws and regulations. User assumes all responsibility and
liability for proper disposal and recycling of the EVM consistent with all applicable international, federal, state, and local
requirements.

5.

Accuracy of Information:

To the extent TI provides information on the availability and function of EVMs, TI attempts to be as accurate

as possible. However, TI does not warrant the accuracy of EVM descriptions, EVM availability or other information on its websites as
accurate, complete, reliable, current, or error-free.

6.

Disclaimers:

6.1 EXCEPT AS SET FORTH ABOVE, EVMS AND ANY MATERIALS PROVIDED WITH THE EVM (INCLUDING, BUT NOT

LIMITED TO, REFERENCE DESIGNS AND THE DESIGN OF THE EVM ITSELF) ARE PROVIDED "AS IS" AND "WITH ALL
FAULTS." TI DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, REGARDING SUCH ITEMS, INCLUDING BUT
NOT LIMITED TO ANY EPIDEMIC FAILURE WARRANTY OR IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF ANY THIRD PARTY PATENTS, COPYRIGHTS, TRADE
SECRETS OR OTHER INTELLECTUAL PROPERTY RIGHTS.

6.2 EXCEPT FOR THE LIMITED RIGHT TO USE THE EVM SET FORTH HEREIN, NOTHING IN THESE TERMS SHALL BE

CONSTRUED AS GRANTING OR CONFERRING ANY RIGHTS BY LICENSE, PATENT, OR ANY OTHER INDUSTRIAL OR
INTELLECTUAL PROPERTY RIGHT OF TI, ITS SUPPLIERS/LICENSORS OR ANY OTHER THIRD PARTY, TO USE THE
EVM IN ANY FINISHED END-USER OR READY-TO-USE FINAL PRODUCT, OR FOR ANY INVENTION, DISCOVERY OR
IMPROVEMENT, REGARDLESS OF WHEN MADE, CONCEIVED OR ACQUIRED.

7.

USER'S INDEMNITY OBLIGATIONS AND REPRESENTATIONS.

USER WILL DEFEND, INDEMNIFY AND HOLD TI, ITS

LICENSORS AND THEIR REPRESENTATIVES HARMLESS FROM AND AGAINST ANY AND ALL CLAIMS, DAMAGES, LOSSES,
EXPENSES, COSTS AND LIABILITIES (COLLECTIVELY, "CLAIMS") ARISING OUT OF OR IN CONNECTION WITH ANY
HANDLING OR USE OF THE EVM THAT IS NOT IN ACCORDANCE WITH THESE TERMS. THIS OBLIGATION SHALL APPLY
WHETHER CLAIMS ARISE UNDER STATUTE, REGULATION, OR THE LAW OF TORT, CONTRACT OR ANY OTHER LEGAL
THEORY, AND EVEN IF THE EVM FAILS TO PERFORM AS DESCRIBED OR EXPECTED.

Содержание ADS1x48EVM

Страница 1: ...nto the ADS1x48 devices enable precision measurement for many types of analog temperature sensors including thermocouples resistance temperature detectors RTDs and thermistors This user s guide descri...

Страница 2: ...ut Connections 12 4 ADS1x48EVM GUI 28 4 1 Home 28 4 2 Data Capture 31 4 3 Register Map 33 5 Bill of Materials Printed Circuit Board Layout and Schematic 36 5 1 Bill of Materials 36 5 2 Printed Circuit...

Страница 3: ...IDAC and a High Side RREF 22 Figure 3 17 Connection Diagram for a 3 Wire RTD Using Two IDACs and a Low Side RREF 23 Figure 3 18 Connection Diagram for a 3 Wire RTD Using Two IDACs and a High Side RREF...

Страница 4: ...nal Block J6 to ADC Connections 17 Table 3 5 ADS1x48EVM Settings for Different RTD Types 26 Table 5 1 Bill of Materials 36 Trademarks Firefox is a trademark of Mozilla Foundation Chrome is a trademark...

Страница 5: ...d listed in Table 3 2 The combined ADS1x48EVM and PAMBoard incorporate the following features ADS1x48 a 16 or 24 bit delta sigma ADC with eight input channels Input terminal block and jumper configura...

Страница 6: ...rd directly to a USB port on the computer Do not connect the cable through a USB hub 5 Open up the web based GUI available on the EVM landing page ADS1148EVM PDK or ADS1248EVM PDK a First time users m...

Страница 7: ...gulator uses this 5 5 V output to provide clean and stable 5 V and 3 3 V supplies from the PAMBoard to the ADS1x48EVM Two LEDs light up on the PAMBoard as shown in Figure 3 1 when the USB cable is plu...

Страница 8: ...accept a digital supply voltage DVDD range from 2 7 V to 5 25 V On the ADS1x48EVM the ADS1x48 DVDD is a fixed value of 3 3 V As with AVDD this 3 3 V DVDD is sourced from the USB power supply voltage...

Страница 9: ...aximum flexibility Table 3 1 details these four options Figure 3 3 shows the location of each VREF option highlighted in yellow as well as each VREF test point highlighted in red Table 3 1 Summary of...

Страница 10: ...his pin is marked GND on the ADS1x48EVM silkscreen Enable an external clock by connecting the shunt to the JP2 1 pin on the JP2 header This pin is marked EXT_CLK on the ADS1x48EVM silkscreen When the...

Страница 11: ...2 Use these connection points for troubleshooting the SPI communication with a logic analyzer or to attach an external MCU to control the ADS1x48EVM without the PAMBoard Figure 3 5 ADS1x48EVM to PAMBo...

Страница 12: ...rminal Block Input Description J5 and J6 Terminal Block Input Label Description J5 1 TC Positive thermocouple general purpose input J5 2 TC Negative thermocouple general purpose input J5 3 REF5025 2 5...

Страница 13: ...e DNP and therefore do not come installed on the EVM To use the pullup and pulldown resistor method install 1 M to 10 M resistors in the aforementioned locations With these resistors installed the the...

Страница 14: ...n report This document also discusses the need for cold junction compensation CJC which is used in conjunction with the thermocouple voltage to derive the measured temperature The ADS1x48EVM includes...

Страница 15: ...shows two DNP components a thermistor RT1 and a 10 k linearization resistor R14 RT1 can be used for CJC for thermocouple measurements see Section 3 5 2 1 R14 helps linearize the thermistor output volt...

Страница 16: ...more accurate thermocouple measurement Figure 3 11 PCB Layout for J5 Terminal Block Showing Copper Pours for CJC Measurement As discussed in Section 3 5 2 and in Figure 3 9 thermistor RT1 is not popu...

Страница 17: ..._C 0 01uF C5 1000pF C2 1000pF C6 4 12k R10 4 12k R12 4 02k R11 GND GND GND 1 2 3 4 5 6 J6 GND GND JP3 JP4 JP5 JP6 Figure 3 12 RTD Input Structure on the ADS1x48EVM Table 3 4 ADS1x48EVM Terminal Block...

Страница 18: ...ns can be measured with the ADS1x48EVM including 2 wire RTD using a low side RREF 2 wire RTD using a high side RREF 3 wire RTD using one IDAC and a low side RREF 3 wire RTD using one IDAC and a high s...

Страница 19: ...Figure 3 13 also shows that for this RTD configuration the RTD is connected to REFP1 and RTD_B Additionally jumpers JP3 and JP4 are connected whereas jumpers JP5 and JP6 are disconnected Finally the...

Страница 20: ...14 also shows that for this RTD configuration the RTD is connected to REFN1 and RTD_B Additionally jumpers JP4 JP5 and JP6 are connected whereas jumper JP3 is disconnected Finally the AIN1 pin on the...

Страница 21: ...D configuration the RTD is connected to REFP1 RTD_A and RTD_B Additionally jumpers JP3 and JP4 are connected whereas jumpers JP5 and JP6 are disconnected Moreover the IEXC1 current source is enabled F...

Страница 22: ...ation the RTD is connected to REFN1 RTD_A and RTD_B Additionally jumpers JP4 JP5 and JP6 are connected whereas jumper JP3 is disconnected Moreover the AIN1 pin on the ADS1x48 is configured to be a cur...

Страница 23: ...ow Side RREF Figure 3 17 also shows that for this RTD configuration the RTD is connected to REFP1 RTD_A and RTD_B Additionally jumpers JP3 and JP4 are connected whereas jumpers JP5 and JP6 are disconn...

Страница 24: ...ws that for this RTD configuration the RTD is connected to REFN1 RTD_A and RTD_B Additionally jumpers JP4 JP5 and JP6 are connected whereas jumper JP3 is disconnected Finally the AIN1 pin on the ADS1x...

Страница 25: ...gure 3 19 also shows that for this RTD configuration the RTD is connected to REFP1 RTD_A RTD_B and RTD_C Additionally jumper JP3 is connected whereas jumpers JP4 JP5 and JP6 are disconnected Finally t...

Страница 26: ...on settings 3 5 3 9 Summary of ADS1x48EVM RTD Configuration Settings Table 3 5 summarizes the required IDAC jumper and analog input channel settings to measure each RTD configuration using the ADS1x48...

Страница 27: ...on J5 as General Purpose Signal Inputs As Figure 3 21 shows resistors R24 and R23 are not populated by default resulting in a set of analog inputs that are only subject to the differential filter cuto...

Страница 28: ...1x48EVM Home Data Capture Register Map The following sections step through each GUI page in more detail 4 1 Home The Home page is the GUI start up landing page The Home page provides a high level over...

Страница 29: ...ce name Clicking the icon as shown in Figure 4 3 displays specific information regarding the ADS1x48EVM Figure 4 3 Connected Hardware Information www ti com ADS1x48EVM GUI SBAU378A SEPTEMBER 2021 REVI...

Страница 30: ...provides a way to display the current COM port settings in a pop up dialog with options to change the COM port or reconfigure the settings as necessary 4 1 1 3 Tools Menu The Tools drop down menu offe...

Страница 31: ...ired input signal amplification SELFOCAL button for performing a device ADC offset calibration Figure 4 6 Capture Settings Slide Out To collect data select the number of Samples to collect in the uppe...

Страница 32: ...the standard deviation within the data set Pk to Pk representing the total noise peak to peak within the data set Eff Res representing the effective resolution as number of bits with the value in pare...

Страница 33: ...ee dynamic range THD or total harmonic distortion SINAD or signal to noise and distortion ENOB or effective number of bits Harmonics The FFT plot is rather meaningless for dc input voltages However a...

Страница 34: ...Bits menu to toggle the bit settings As the bit settings change the Field View options also change to the corresponding register setting 4 3 1 Register Read and Write Options Figure 4 11 highlights th...

Страница 35: ...turned off Figure 4 12 Auto Read Options 4 3 1 2 Write Register Options The GUI default option for register writes is Immediate Write When Immediate Write is selected any register configuration change...

Страница 36: ...eader 2mm 2x1 Tin TH TMM 102 01 T S Samtec R1 R2 R7 R8 R17 5 RES 10 0 k 1 0 1 W 0603 RC0603FR 0710KL Yageo R3 1 RES 470 5 0 1 W 0603 RC0603JR 07470RL Yageo R4 1 RES 390 1 0 1 W 0603 RC0603FR 07390RL Y...

Страница 37: ...bit 2kSPS 8 Ch Delta Sigma ADC for Precision Sensor Measurement PW0028A TSSOP 28 ADS1248IPWR or ADS1148IPWR Texas Instruments R14 0 RES 10 0 k 1 0 1 W 0603 RC0603FR 0710KL Yageo R23 R24 0 RES 10 0 M 1...

Страница 38: ...tom layer yellow top silkscreen internal GND layers not shown Figure 5 1 Composite PCB Layout Bill of Materials Printed Circuit Board Layout and Schematic www ti com 38 ADS1x48EVM Evaluation Module SB...

Страница 39: ...round Layer 1 Figure 5 5 Internal Ground Layer 2 www ti com Bill of Materials Printed Circuit Board Layout and Schematic SBAU378A SEPTEMBER 2021 REVISED JANUARY 2022 Submit Document Feedback ADS1x48EV...

Страница 40: ...ottom Silkscreen Bill of Materials Printed Circuit Board Layout and Schematic www ti com 40 ADS1x48EVM Evaluation Module SBAU378A SEPTEMBER 2021 REVISED JANUARY 2022 Submit Document Feedback Copyright...

Страница 41: ...1 2 3 JP2 CLK_EXT CLK_EXT DRDY 0 1 R6 3V3 AVDD GND SCLK EEPROM_WE SCL_LP SDA_LP IEXC1 IEXC2 START 10 0k R7 10 0k R8 10 0M R24 DNP AVDD 10 0M R23 DNP 4 12k R16 4 12k R13 REFOUT 0 01uF C10 0 01uF C12 1...

Страница 42: ...22 from Revision September 2021 to Revision A January 2022 Page Deleted inclusive terminology from document 5 Changed EVM landing page links to correct locations throughout document 6 Revision History...

Страница 43: ...ther than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control tec...

Страница 44: ...These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not in...

Страница 45: ...instructions set forth by Radio Law of Japan which includes but is not limited to the instructions below with respect to EVMs which for the avoidance of doubt are stated strictly for convenience and s...

Страница 46: ...any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electr...

Страница 47: ...R DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthe...

Страница 48: ...change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of thes...

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