https://e2e.ti.com/support/data-converters-group/data-converters/<p style="display:none;">blank</p>en-USTelligent Community 13https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1661346/dac34sh84-output-inconsistency-2/6419058Thu, 16 Jul 2026 12:23:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:3076eea8-7713-44cc-9374-9d9939306927Adam SinkovicsHello, The issue indeed seems to be related to the CDCE62005 and it locking the PLL. Thank you for the suggestion.https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1664595/ads5296a-ads-5296---error-in-test-dc-value/6419026Thu, 16 Jul 2026 11:53:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:f35d704b-6959-4a5a-992f-42163d9b0f07Zeev GerberHi, the problem occur randomly. could happened one time or more for each problematic channel. there are no fix voltage between the problematic places.https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1664595/ads5296a-ads-5296---error-in-test-dc-value/6418983Thu, 16 Jul 2026 11:17:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:8e138ee0-2803-452b-85e2-362bcbaf4e4fSheetal GuptaHi Zeev, Thanks for the information. I received your last message. One more thing we want to understand from you is: if you sweep the DC input voltage from 0 to 2V, do you see the missing code issue occurring in some systematic way for these channels? For example, do you see the issue in bad channels occur periodically across DC input voltage sweep. Does it occur for let&#39;s say DC input of 100mV, then 200mV then 300mV and so on?https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1664595/ads5296a-ads-5296---error-in-test-dc-value/6418856Thu, 16 Jul 2026 09:29:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:0146600a-6245-4f4e-94cf-680567a68866Zeev Gerberdo you get the last massege?https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1664595/ads5296a-ads-5296---error-in-test-dc-value/6418853Thu, 16 Jul 2026 09:27:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:84331aa3-b50b-48bb-bf83-191bbf50df63Zeev GerberHi, 1. we have 64 channels in card and check three cards. the test run 20 time on each dc input and delta bigger then 2 is consider error card #1 have 5 defective channels. (2 ADC) card #2 have 1 defective channels. card #3 have 0 defective channels 2. we run 20 time in each dc inputs and the error in most cases are 10%-20% of the samples. the other samples are O.K when we have error the value is show higher value. the step we run is ~4 LSB, and when we see high delta (10 for example) in the next step we will get delta of 6. 3. the 20 runs are 20 Followers sample for the dame channel with the same dc input. the errors are usually repeatable in the next test. 4. in my application I measure ballistic events. the test is to test the system noise and the functionality of the ADC. 5. I need the ADC to work properly in all the range of 0-2V.https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1663053/ads124s08-data-error-about-earth-and-gnd-when-measuring-rtd/6418820Thu, 16 Jul 2026 09:00:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:af0d1dde-d28b-4bb6-be0b-aefee1225022wang tingHi, Li First, you&#39;re right—we don&#39;t have an isolation chip between the ADS124S08 and the MCU. I understand that isolation can help with digital noise, but in our case, we have to tie system ground to earth ground, otherwise the readings drift way off. That seems like a different issue than isolation. Second, PCB2 and PCB3 are just interface boards. We need them because we have many channels and long cable, and they have no filtering circuit at all. Third, we tried moving the reference resistor to PCB1 as you suggested, but it didn&#39;t help much—almost no effect. We&#39;ve tested quite a few things, and the only thing that clearly works is connecting system ground to earth ground. It seems like that gives the noise a good path to go. Have any of your other customers seen this issue before? Any advice would be appreciated. Thanks again！https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1664595/ads5296a-ads-5296---error-in-test-dc-value/6418788Thu, 16 Jul 2026 08:33:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:3ca3a2a9-4f9f-416c-b99b-6e9646c7b453Sheetal GuptaHi Zeev, Thanks for sharing the details. I would also like to understand the following: 1. You mentioned that some channels are showing the missing codes problem. May I know out of 64 channels, how many channels show the problem? 2. You mentioned that there are some channels for which even if you add small DC voltage, they will consistently show the problem. Does it mean that if you if do this 20 times, all the times you will see delta of 9/10 or do you see that the expected value should be 0xx66 and you always get higher value 06a or 0x6c? This question is necessary to understand how repeatable this problem is. Do the missing codes occur always, or do they show shift over time? 3. We would also like to see the plot of the ADC output code/value (plot in Y-axis) with sweeping DAC DC voltage (X-axis). Is this plot repeatable in 20 runs? 4. Do you always give fixed input DC voltage in your application, or it may be any DC voltage? If it is a missing code problem for a fixed DC voltage value, based on your application can you consider giving some other fixed DC voltage for which you don&#39;t run into missing codes problem and compensate it in the final output value?https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1664862/adc12qj1600evm-manual-jumper-gbtclk-source-selection-does-not-workThu, 16 Jul 2026 08:31:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:fb2f61fa-2b74-4da3-b92d-c2faab15b80eMichaelPart Number: ADC12QJ1600EVM Hi all, We have ADC12QJ1600EVM kit, and we are migrating to our software control. We found out that with unplugged USB cable and unplugged jumper, GBT_SEL_USB/LMK_CLKIN_SEL is around 2.2V and therefore not interpreted as logic zero. There is DNP pull-down resistor, but it is difficult to assemble the small footprints. It should be popoulated, I guess. Also, documention is somehow wrong, in the useguide: In the schematics: BR, MichaelWireless InfrastructureADC12QJ1600EVMhttps://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1664493/ads112c04-request-for-fit-mtbf-standard-and-methodology/6418613Thu, 16 Jul 2026 06:08:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:28bcb3fc-fc37-4a5a-a2da-45b68f443dc4Vijayalakshmi VHi Andrew, Thank you for your detailed clarification. We appreciate your support and the time you took to explain everything clearly.https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1664768/ads7961-could-you-please-explain-the-power-sequencing-requirements-for-the-ads7961-adc-icThu, 16 Jul 2026 03:54:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:7248c14e-83a3-4175-b49c-cff618fb4914Koki TsushimaPart Number: ADS7961 Could you please explain the power sequencing requirements for the ADS7961 ADC IC? This is a dual-supply IC, and the customer is using 5V for the analog supply and 1.8V for the digital supply. In the datasheet&#39;s &quot;10 Power Supply Recommendations&quot; section, it states: &quot;The analog supply voltage must always be greater than or equal to the digital supply voltage.&quot; Does this mean that applying the 1.8V first would be unacceptable?ADS7961Aerospace &amp; Defensehttps://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1663932/ads8688w-ads8688w-mspm0-example-code-could-not-be-found/6418441Thu, 16 Jul 2026 02:47:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:036a3fd4-3e24-4850-adb8-99acc40e1d8bYuki NishinomiyaDear Jiyah, Thank you for explaining the publication status of the ADS8688W example code. I appreciate the information you provided and your support. I look forward to hearing from you once it becomes available. Regards, Yukihttps://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1656757/dac80501-thermal-hysteresis/6418381Thu, 16 Jul 2026 01:18:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:3e8936d1-45fc-476a-9284-01de84deca7dJoseph WuSteve, I&#39;ve been on travel a couple of times and I hadn&#39;t gotten a chance to look into this. I wasn&#39;t able to find the specific data set used for the hysteresis measurements. I did talk to one of the engineers that has first hand knowledge of the measurements and it appears that the part was cycled from 25C to 125C down to -40C and then back to 25C. This was done for a number of units (maybe 10) for 5 cycles. I don&#39;t think there&#39;s a way to apply this voltage to a narrower range. By it&#39;s nature, this hysteresis is not a linear phenomenon. Additionally, we don&#39;t have data at intermediate points within the cycling. I&#39;m sorry, but I don&#39;t think this helps very much. The specification and method of test doesn&#39;t lend itself to any narrowing of the voltage by temperature range. Joseph Wuhttps://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1664434/ads1288-how-to-deal-with-digital-and-analog-gnd-unified-gnd-or-isolated-agnd-islands/6418317Wed, 15 Jul 2026 23:26:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:ad689846-7af0-4653-bcdd-0b6fcc932bb6Keith NicholasHello Dan, In general, a single solid ground plane with proper component placement works well. However, depending on how close the high speed digital components and any switching power supplies are located relative to the ADCs, separating the grounds can be helpful. I have used single ground planes for all of our high performance ADC evaluation boards, and have been able to meet datasheet specs. However, I typically do not have switching power supplies, high speed digital (other than the ADC connections), or any other high frequency components such as motor controls, on the same board. Your first approach (A) can certainly be used, and may provide better noise performance. My only recommendation is to use a wide ground connection between the DGND and each of the AGNDx sections of the board. Do not use a 0ohm resistor, as this adds inductance that will possibly degrade EMI/EMC/ESD performance. Regards, Keith Nicholas Precision ADC Applicationshttps://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1652596/ads1258-ep-external-gain-and-data-acquisition-time/6418309Wed, 15 Jul 2026 23:15:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:c449bc98-8030-473a-8851-aaecbc5c184cShuji IshiwataHi Bryan, Thank you for your reply. I instruct customers to follow the previously provided procedures when changing commands. Customer question was intended to find out the earliest possible timing for making such a command change. I have a follow-up question. When continuously acquiring data for the same command, is it correct to understand that the START signal must be kept High? Best Regards, Ishiwatahttps://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1663587/lsf0102-q1-sleep-mode-current-consumption/6418290Wed, 15 Jul 2026 22:46:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:71d00737-0a6b-4528-8569-c2e8be227afeBrian Lin (TXP)Hi Prafulla , I would suggest TXU0202 that can minimize the power consumption (2.5uA max at room temp). Thanks. Brianhttps://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1664577/ads1000-ads1000-esd/6418217Wed, 15 Jul 2026 21:35:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:c5b0d891-e9ba-43be-b96d-c20a1a29a370Mason MarreroHello Martin Lastovic, Thank you for your interest in our Precision ADCs. The ESD HBM value is &#177; 2,000V and the CDM value is &#177; 500V. Regards, Masonhttps://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1664580/dac8742hevm-dac8742h-hart-modem-evm-iovdd-and-mod_out-issue/6418153Wed, 15 Jul 2026 21:04:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:05606e53-732e-4449-b18e-38f062f93caeJoseph WuShardul, The jumpers look like they are set in the right position for default operation. Here&#39;s what they should look like. If you&#39;re having problems getting it to work, it might be something in the GUI operation. First check the upper right corner of the GUI and find the &quot;Demo Mode&quot; box. If the Demo Mode box is checked, that means the USB2ANY isn&#39;t active. Click on the box and the USB2ANY should be connected to the EVM. You should be generate HART communication through the GUI. If you&#39;re using an alternate controller, remember that you need to set /RTS low to enable the modulator to send an output signal. Joseph Wuhttps://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1664159/dac161s997-multi-channel-2wire-current-loop/6418136Wed, 15 Jul 2026 20:49:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:175d23ac-07a7-4796-a10f-5446ae98f27bLucas BurnetteHi Fabian, In my understanding, when trying to have multiple loops regulated in a two wire setup, each DAC116S997 will need its own loop supply. If not, you will have each DAC trying to regulate the loop current from the shared supply, causing errors in the current value. The 24V from the PLC is a shared power supply in your diagram, correct? If using a 3-wire configuration where the analog signal current is separate from the power supply loop, you can have a single shared power supply for multiple current output loops. Industrial DACs: An overview of analog outputs and architectures Thank you, Lucashttps://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1662968/dac81416-questions-about-ldac-control/6418117Wed, 15 Jul 2026 20:31:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:1da68ba1-65de-49b5-9911-349205dfd422Erin BowrieHi Hiromu-san, 1) Yes, for the purposes of this register always write 1s to bits 13-8. 2) The NOP register doesn&#39;t do anything. By &quot;No operation&quot;, it means no functional changes for the device when writing to the register. You can ignore this register. Thanks, Erinhttps://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1664569/amc7823-issue-with-reported-bit/6418112Wed, 15 Jul 2026 20:27:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:02c553ad-ff11-4de7-9766-5d011a0c3b8dErin BowrieHi Khadija, Could you clarify what you mean by BIT? Thanks, Erin