Forum Post: RE: OPA2354: EMI hardened or EMIRR
Texas Instruments » Amplifiers
by Clemens Ladisch
19m ago
See OPA354, OPA2354, OPA4354 EMI Immunity Performance ..read more
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Forum Post: RE: OPA354A-Q1: Is there information available on the EMIRR performance of this OP amp. Has testing been performed on this hardened amplifier as described in the TI report on EMIRR. Is there a way to have such testing performed if it has not been done?
Texas Instruments » Amplifiers
by Clemens Ladisch
19m ago
See OPA354, OPA2354, OPA4354 EMI Immunity Performance ..read more
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Forum Post: RE: TLV7031: 150V Transient Durable Digital Input
Texas Instruments » Amplifiers
by Egemen Aksoy
19m ago
Hello, When the feedback resistor (R5) changed to the 1MEG the simulation result got weird. The simulation result is attached. What is causing this problem? Best Regards ..read more
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Forum Post: BUF634A: Paralleling devices
Texas Instruments » Amplifiers
by Michal Tyc
2h ago
Part Number: BUF634A Tool/software: Dear Support Team, We consider paralleling a few (say, four) BUF634As to increase the output current. Is it advisable? We cannot find any notes in this topic. We have conducted simulations in TINA and the results look promising, but we are conscious that the models do not fully replicate the reality. If it is fine, how small can be the current equalization resistors at the output of each device? We would like to avoid unnecessary heat dissipation. Best regards, Michal ..read more
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Forum Post: RE: INA226: How long for ALERT pin to assert after limit is crossed
Texas Instruments » Amplifiers
by Mitch M
7h ago
Hey Zach, Yes, by channels I meant shunt voltage and bus voltage, sorry I should have been more clear. [quote userid="533230" url="~/support/amplifiers-group/amplifiers/f/amplifiers-forum/1375141/ina226-how-long-for-alert-pin-to-assert-after-limit-is-crossed/5253723#5253723"]multiply the conversion time for the measurement associated with the ALERT by 2 and then add the other conversion time[/quote] This would be the correct way to calculate the maximum alert response time. Regards, Mitch ..read more
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Forum Post: RE: INA226: How long for ALERT pin to assert after limit is crossed
Texas Instruments » Amplifiers
by Zach Kimble
7h ago
Hi Mitch, Thank you for your quick response! Just to confirm, when you say to add their conversion time to that value when multiple channels are enabled, do you mean add the conversion time for both the bus voltage measurement and the shunt voltage measurement and then multiply that total by 2, or multiply the conversion time for the measurement associated with the ALERT by 2 and then add the other conversion time? Also, when you say channels, do you mean just shunt voltage or bus voltage measurement (for this device at least)? Have a great weekend! Best regards, Zach Kimble ..read more
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Forum Post: RE: INA226: How long for ALERT pin to assert after limit is crossed
Texas Instruments » Amplifiers
by Mitch M
7h ago
Hello Zach, I went over the numbers in those plots, and it looks like they figures are swapped.... The faster conversion time will have a faster ALERT response time. In general, the ALERT response time will depend on the conversion time and how far the threshold is exceeded. When only one channel is enabled, the ALERT response will always be less than 2 times the conversion time. If additional channels are enabled, then add their conversion time to the that value. Regards, Mitch ..read more
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Forum Post: RE: OPA857: Output of OPA857 staying constant.
Texas Instruments » Amplifiers
by Ignacio Vazquez Lam1
7h ago
Hi Ankur, There is one test that would be worth running to see if it is the device itself. There is an option to run the device as an inverting amplifier which your schematic has the ability to do. Would it be possible to disconnect the APD and connect a 5kOhm at R268 and put a voltage of around 2.5V (left pad of R268) to see if the output does change? This will ultimately rule out the device does not have some kind of damage. Best Regards, Ignacio ..read more
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Forum Post: INA226: How long for ALERT pin to assert after limit is crossed
Texas Instruments » Amplifiers
by Zach Kimble
7h ago
Part Number: INA226 Tool/software: Hello, I am trying to figure out how long it will take for the ALERT pin to assert after a bus overvoltage event. In the datasheet in section 8.2.1.3, there are two graphs that show an input exceeding a limit and then the ALERT pin being asserted. However, I am not understanding why the time it takes for ALERT to be asserted is 10x longer when the conversion time is 140us when compared to 1.1ms. Can you please explain why it takes longer with a shorter conversion time? Is there a way to estimate how long it will take for ALERT to assert when using various con ..read more
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Forum Post: OPA354A-Q1: Is there information available on the EMIRR performance of this OP amp. Has testing been performed on this hardened amplifier as described in the TI report on EMIRR. Is there a way to have such testing performed if it has not been done?
Texas Instruments » Amplifiers
by Jeffrey Lacy
10h ago
Part Number: OPA354A-Q1 Tool/software: We are developing a portable mass market electronic product that is experiencing cell phone interference. We want to use this EMI hardened op amp as a direct replacement for the OPA836DBV that is experiencing the problem of cell phone interference ..read more
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