https://e2e.ti.com/support/amplifiers-group/amplifiers/Find answers, share knowledge, solve problems with fellow engineers.en-USTelligent Community 13https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1684472/amc0330s-q1-suitability-of-amc0330s-for-drop-in-replacement-of-si8922bbd/6493998Thu, 24 Sep 2026 18:33:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:9638f04a-1bbb-4419-b162-7a4cf30e334cWayne FannonOh wow. You're right. I either totally misread the Si8922B datasheet or just assumed gain was 1. So what I really need is a single-ended output version of the AMC0300, like you said. But that isn't something in the TI lineup. So... maybe the easiest replacement for us would be to use the AMC0311S and adjust my voltage divider resistor values to provide 8.2 times the sense voltage as before?https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1685093/vfc32-parts-could-be-in-jeopardy-due-to-moisture-barrier-bag-received-openThu, 24 Sep 2026 18:26:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:0772c685-a8b2-44ac-996a-c7ebe32163cdBrenda CarranzaPart Number: VFC32 We bought 300 pcs of part number VFC32KU/2K5 when the parts arrived at our Central Warehouse and inspection from our Broker needs to be performed for transfering process to our Plant. However during that inspection the Moisture Barrier Bag wa cut on one side and left it open not closed or sealed back, then we received the 300 pcs within the same open bag. Is this issue something that can compromise the use of each individual part VFC32KU/2K5 or cause damage to the part? Open Bag - TI part VFC32KU 2K5.pdfVFC32https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1684959/ths3491-ths3491irgtr-vs-ths3491irgtr-b/6493989Thu, 24 Sep 2026 18:23:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:6e8ad1ec-aacd-4e73-9eed-4172a6a18468Ignacio Vazquez Lam1Hi Christoph, Their is no difference between the devices that highlight the .B. This was a marker used to distinguish manufacturing flows. Below is a link that explains the meaning of these suffixes. Regarding your second question, we do expect more units to become available within the end of the month. I would continue checking online as we do expect more units to come available soon. We also do not have any plans of obsoleting this device. https://www.ti.com/support/import-details.html#tab-2 Best Regards, Ignaciohttps://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1685086/opa549-opa549s-functional-safety-failure-mode-questions-regarding-ilim-and-output-stage/6493988Thu, 24 Sep 2026 18:23:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a1f84e41-3d86-4815-9170-1bd58a360aadJacob NogajHi Garrett, Thanks for reaching out. 1. Floating the I limit pin can cause the output to become non-linear, though it would more than likely cause the output to lack any appreciable amount of current drive. The activation of the shutdown can sometimes cause reactive loads to have a temporary short output spike due to the amplifier output stage entering non-linear operation (similar to why many designs use flyback diodes for relay control). What is the load of your amplifier? 2. No, OPA549 programmable limit directly causes output stage transistors to have more or less drive capacity. A failure at this pin would result more than likely result in the device lacking any output current drive (see previous statement about floating I Limit) For my reference, what output limit are you programming the device to? 3. I have never seen or heard of the device losing the ability to current limit. If this unique scenario occurred, I would expect that a curve trace of the I Limit pin would look anormal. Understand however that even in the very unlikely event the limit becomes damaged, the device is still internal limited to about 10-12A peak current regardless of adjustable current limit. 4. I searched through our internal documentation, but could not find any FMEA information. This information does often come with automotive -Q1 devices, but standard parts are less common to see. We do also have the OPA549-HIREL, but this device will be more geared around providing information on lot conformity, operating life, and traceability. 5. I like to see Schottky diodes to the supply rail for protecting the amplifier output from EOS and some ESD events. Can I know what this load is? Is the load sensitive to excessive voltage or current? I agree with your thinking, it is important to consider the ILIM pin in this analysis. I am merely providing this information as a point of advisory guidance, no information in this thread should be considered replacement of involved functional safety qualification tests. I think that the ILIM function is a reliable way to implement coarse current limit to a power amplifier. More application details may help me understand potential protection schemes we could consider for additional protection. Thanks, Jacobhttps://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1684530/tlv3201-tlv3201aidbvt-msl-rating-clarification-request/6493961Thu, 24 Sep 2026 17:58:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:ac7de0af-10ba-462d-a6cb-cce8792be239Paul GroheHello Kevin, Your device is from 2023. At the time, the level was MSL2. Different assembly sites can have different MSL levels. The datasheet/web will show the worst case. In 2023, there were two production sites, but the TFME assembly site had MSL2. Production at the TFME site was discontinued in 2023. The current assembly site is MSL1. Since the MSL "improved" and nothing changed at the other assembly site, no PCN was issued. You can query the MSL levels below, where it will show the MSL differences between the assembly sites (Currently only one site for the TLV3201): https://www.ti.com/packaging/docs/mslsearch.tsp Again, the datasheet/web show the WORST case. If the different sites are MSL1 and MSL2, the web/datasheet will show MSL2. The reel/box label will show the MSL level from that site at that time when sealed. It is not a mistake.https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1685029/ina240-ina240-ina600/6493938Thu, 24 Sep 2026 17:37:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:c1937a4e-2fe9-4bb3-bbe1-c34d7ea61547Levi DVHello, Can you tell me more about the issue you are facing with the INA240? What accuracy are you expecting and what accuracy are you measuring and how? If you can share more about the schematic and layout around the INA240 devices that is usually helpful in determining the root cause of accuracy issues. Thanks, Levi DVhttps://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1684891/opa818-opa818-layout/6493933Thu, 24 Sep 2026 17:32:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:7a9165d7-ddc0-4abf-8db1-eca44f750f78Ignacio Vazquez Lam1Hi, For our four layer boards we recommend cutting out the planes under these sensitive nodes for all the layers not just the layer directly beneath the top layer. I would refer to the EVM we designed specifically for this device as your guide for your PCB. This device is quite sensitive to parasitic capacitance so I do recommend following what we did. For this board we removed the planes under the output pin and anything touching this pin as well as the inverting node. However we did not remove the planes under the feedback pin or anything else touching this pin. I would refer to the layer stackup we highlight in the EVM as this will help make things more clear. www.ti.com/.../sbou222a.pdf Best Regards, Ignaciohttps://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1685091/tlc374m-graphs-for-vol-vs-temp-and-vol-vs-iolThu, 24 Sep 2026 17:31:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:5ba801ba-d8ad-4aef-955e-3d155e28a771Keith RoccoPart Number: TLC374M Hello, I was wondering if you would be able to provide me with graphs of Vol vs temperature and Vol vs Iol for the TLC374M. Thank you, KeithTLC374Mhttps://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1681234/ina114-temp-is-not-stable-with-the-new/6493921Thu, 24 Sep 2026 17:13:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:7bf1537d-fe23-4cd1-9310-3259c7385978Robert Clifton56Hi Nikhil, How very interesting. I think I understand this better now. The spurs after the change in the DC monitoring are what the concern is. They look to still be there in the older material but have been increased in the newer material. Do these spurs show up anywhere else in the board from what you have seen? Perhaps the layout is making the newer material more susceptible noise being injected on it at the inputs. Alternatively, the wider bandwidth of the new material might inherently be letting in higher frequencies in that would have naturally been attenuated in the older material. A low pass filter at the input would be a quick way to test this hypothesis. Would this be something that your team can test? Best Regards, Robert Cliftonhttps://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1684958/opa189-bias-current-issue/6493903Thu, 24 Sep 2026 16:57:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:566a0531-04ab-4655-90d7-70f6dfd34044Art KayEnhui, I cannot see the entire op amp circuit. The output feedback path is open-loop. Does this loop get closed? Is your customer trying to use the OPA2189 as a comparator? This device can be used as a comparator, but the specifications are valid in a linear operating state. When used in comparator mode the bias current may not meet the specifications. This is because the differential input is very high (volts) and the chopping calibration will charge and discharge the parasitic input capacitance causing higher than normal input current. If you need a comparator with low input offset voltage but higher bias current this is a good choice. If you need low bias current this is not a good choice. If you close the loop on the same op amp and measure IB it should be in spec. Best regards, Arthttps://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1685086/opa549-opa549s-functional-safety-failure-mode-questions-regarding-ilim-and-output-stageThu, 24 Sep 2026 16:54:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:c78a5144-437b-4594-9243-185c7465b9f3Garrett BarbourPart Number: OPA549 We are evaluating the OPA549S in an application with a sensitive load and are performing a system-level FMEA. Our primary concern is whether an internal device fault could expose the load to excessive voltage or current despite the current limit being programmed via the ILIM pin. Specifically: Are there any known failure modes that could cause the output to drive to +VS or -VS independent of the commanded input signal? Under any credible internal device failure mode, could the OPA549S source or sink substantially more current than the programmed ILIM limit? If loss of current limiting is possible, what failure mechanisms should be considered in a system FMEA? Does TI provide any safety, reliability, FMEDA, FMEA, or failure-mode documentation for the OPA549S that would assist with this analysis? Does TI recommend any external protection methods when driving safety-critical or damage-sensitive loads? Our goal is to determine whether the ILIM function can be considered a reliable safety mechanism or whether independent external protection should be assumed in the system design. Thanks.OPA549OPA549-HIRELhttps://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1682726/opa855-evb_opa855_oscillation-problem/6493887Thu, 24 Sep 2026 16:47:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:37da6ddd-b7d4-4f1d-9c76-6cc72b337b11Evan KirkbrideHi Takahashi-san, Good question. On paper the Riso you've shown from the OPA855 datasheet should do the same thing in that it should dampen any L/C resonance and has the benefit of being inside the feedback such that it doesn't create a voltage drop from the APD current. However in my experience and in simulation it doesn't work as well to dampen any resonance. You can see here in simulation that there is still some notch in the NG. Removing the device from the equation could make things more clear. The Riso will isolate resonances from the In- pin but from the output Rf will need to isolate the resonance instead. However it is shorted-out in high frequency because of the Cf. Note that since VF1 (In-) goes into high-impedance it will overlap with VF2. Feedback Network with Cf: Feedback Network without Cf: Unfortunately you need some Cf to keep the device stable with any input capacitance. Thanks, Evanhttps://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1683383/opa192-power-up-transient-issue-with-the-opa192/6493850Thu, 24 Sep 2026 16:14:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:d80f73f4-8de0-42ec-a7cd-a37c9549daeeArt KayLi, I have not seen any op amp data sheet provide details on power up or power down behavior. This is probably something that should be added in future data sheets. I will let the systems team know. I don't think that there is any parameter or graph that could be used to better understand the power up or power down behavior. This would need to be covered by some kind of new curve or parameter. I have seen power up info on a few "no glitch" comparators, so I think it would be possible to add something for op amps. For this case, I think you have a solution. Let me know if you have additional questions. Best regards, Arthttps://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1684699/tlv1871-tlv1871-inconsistent-pinout-in-datasheet/6493803Thu, 24 Sep 2026 15:41:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:5f1e4f7c-2867-4229-87bc-be2a27f6192fPaul GroheHello Martin, Apologies. The Example drawing was based on an earlier proposed pinout and is incorrect. We need to correct that. The page 3 drawing is the "official" drawing and is correct:https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1684108/xtr200-constant-13v-output-in-0-10v-mode/6493727Thu, 24 Sep 2026 14:35:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:b415a48e-2155-4692-8a48-160ecaad3fd6Michael DoddI was doing a little more testing a noticed another weird thing. The Vin range that results in properly scaled Vout also changes when I change the input power. With a 10kohm resistor from Vout to ground, Vin = 0.317v, I decreased the input power from 24v to 12v, which slowly decreased the voltage from 2.76V to 1.14v. Regards,https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1684822/ina219-astera-labs-ina219-schematic-review/6493713Thu, 24 Sep 2026 14:25:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:bf456655-6914-470e-babc-baf924286a1aLouis LJoey, Thanks for the question and using the E2E forum. One comment I have is on the size of your shunt resistor. If the note of 0.2A is indicating your maximum expected current, the 100mΩ shunt would create a 20mV drop, which is about half of the INA291's FSR with the PGA = /1. If you want, you could increase that shunt a bit to utilize more of the measurement range if the INA219, but it's not a show stopper. Also, I don't specifically see the SDA/SCL pullups on this page, but will assume they're somewhere else in the schematic. Other than that, the schematic looks good. Please let us know if you have any other questions. Louishttps://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1684768/ina236-voltage-measurement-using-ina236/6493708Thu, 24 Sep 2026 14:18:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:32daa41a-5803-4386-a4aa-951a784cc51dLouis LDelish, I have no comments on the schematic, it looks good. The only thing you might want to consider (since you also have the 0R resistors) is adding an unpopulated capacitor between the inputs just in case you decide you need filtering down the road. Louishttps://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1685029/ina240-ina240-ina600Thu, 24 Sep 2026 13:19:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:d3ae8b33-789d-487c-b6cd-cdaf554c8b96Ning LiPart Number: INA240 Other Parts Discussed in Thread: INA600 , Dears, We are designing a TEC temperature controller, with two current channels using INA240 and four voltage channels using INA600. Testing has revealed inconsistent accuracy. Please assist in reviewing the issue. Thank you.Industrial AutomationINA600INA240https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1684108/xtr200-constant-13v-output-in-0-10v-mode/6493623Thu, 24 Sep 2026 12:38:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:ad08fe6d-6c06-407a-9350-3fb2db334972Michael DoddAshley, Thank you so much for your assistance! I've been stuck on this for a while so it means a lot! Regardshttps://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1682726/opa855-evb_opa855_oscillation-problem/6493569Thu, 24 Sep 2026 11:31:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:ef8e4739-7e8b-421e-a89c-cc2ee3bf68e6shin takahashiHi Evan-san, Thank you for your answer. I apologize for the late reply. I understood your explanation. I have a follow-up question. How is Riso (shown in Figures 10–14 of the datasheet) used? Is its usage different from that of the 10Ω resistor (R4) I used this time? Takahashi