Part Number: AMC1211-Q1
I see in the datasheet that the typical common-mode output voltage is 1.44V, and that's with a VDD2 of 3.3V.
If the gain is 1, and the linear input voltage range is 0-2V, does the output swing beyond VDD2 and below GND2? It seems that VOUTP would vary from 1.44 - 3.44V and VOUTN from 1.44V to -0.56V, unless I'm misunderstanding something.
Part Number: OPA197
Hi Team,
Our customer is requesting for the continues power consumption details of the following op-amps:
1. OPA197IDBVR
2. OPA365AIDBVR
3. TLV2313IDGKR
If it is needed to create separate threads for these devices, please let me know so I can create different threads.
If you need also more information from the customer, please let me know.
Thanks!
Jonathan
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Part Number: THS7376
Hi Team,
Does THS7376 support 1920x1080p?
Thanks
Part Number: INA190
I would like to use the INA190 instead of the INA199. As noticed earlier with the INA199, the supply current to the chip increases when the output goes beyond the linear region.
Should I expect the same to happen with the INA190 as well?
Part Number: OPA344
Hi Team:
Please help to provide Junction to case parameter of OPA344NA for RD request , thanks.
Regards / Mark
Part Number: OPA827
Hello
How to define the stability of an AOP that has a gain <1 Ex: a gain of 0.25
How to find the phase margin, gain <0db?
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See attached document
Best regards
Part Number: INA226
Hello, I also want to use INA226 to sense voltage higher than 36V (max 58V ). Is there any easier way to do that instead of adding OPA333 and fets?
we don't need a very precise current read so maybe just an equal voltage divider on Vin+ and Vin-?
We changed the voltage of the system to 48V when it was 30V before and we missed that part....the gerbers are almost out so I need the simplest/fastest solution. I added a voltage divider on Vbus but forget about Vin+ and Vin-.
Any suggestion to help?
Thanks
Part Number: OPA192
Hi,
I want to confirm that the OPA192 opamp will require input protection for the inputs when powering up the device.
I am using the opamp as a DC servo in a class A/B amplifier. After investigation, the opamp is outputting 6volts on the negative input. I had replaced one of the previous back to back 10volt zeners as it seems to have failed.
I am using +/-15volts to power the opamp. What may have happened is that I applied the +/-30volts to the power amp, which applied a low current signal with 10uA magnitude, at 10volts to the negative opamp input without power being applied to the opamp.
I can see from the datasheet absolute ratings that you must not apply to any input, more than 0.5volts greater than the power supply. Obviously this has occurred, but at low current = 10uA. I examined other posts :
From the post, it is not clear whether the 10mA maximum current limit and +/-0.5volts greater than +/-Vsupply has to be met simultaneously. That is, can you exceed +0.5volts greater than the supply, as long as the current is below 10mA ??
As such, I assume that the cause of the opamp failure is the excess low current voltage, and to mitigate this in the future, that schottky diodes should be added to the opamp inputs, connecting to the power supply inputs of the opamp ?
In the final build of the amplifier, I can ensure that the power supply for the DC servo is applied to the opamp before any power amp power supply.
Thanks and regards,
Shadders.
Part Number: LM331
Hi Team,
We have a customer inquiry that wants to use LM331 in the V/F configuration.
Our customer needs to know the voltage out at pin 3 to prevent blowing the microcontroller in reading the output frequency.
Please let me know if you need more information.
Thanks!
Jonathan
Part Number: LMP7718
I need something close to a 1 Mhz TIA for interfacing to a photodiode. It has to work indoors and outdoors, so I'm looking at DC coupled, but including an additional op amp that will keep the TIA biased regardless of DC (or low frequency) noise:
(The 1T inductor and capacitor are just there to break the loop for AC analysis).
The design will need 24 of these (pair of light curtains), so op amp cost is important. Using an uncompensated op amp like a LMP7718 seems more cost effective than using the OPA320. But, I suspect that I need additional stability compensation.
When I do the open loop plots, I get this:
It's been a long time since I did this type of a thing for a living, so please forgive me if I'm asking a stupid question.
Literally, the phase margin is 61 degrees--at least the phase of open loop gain when the gain is zero. But, notice the phase got much closer to zero (41 degrees) when the gain was still quite high. Don't I have to worry about that?
I did a step response and saw a very large amount of peaking. Several times bigger than the settled output change.
Am I correct in thinking I've got a stability problem? Changing the feedback cap doesn't seem to affect the phase margin where the gain is still very positive, nor the frequency at which that occurs. Changing the cap in the DC feedback amp doesn't change things much either.
This is an uncompensated op amp, but I saw very similar results with the OPA320. Everything made sense if I used AC coupled instead of DC coupled with the DC servo. But, when I add the extra op amp generated feedback, I'm getting lost.
Any help would be appreciated!
Part Number: OPA2189
Hi,
I am afraid that there are some conflicting specs with respect to CMRR, PSRR and output swing in the OPAx189 datasheet.
1) Fig. 14 states CMRR and PSRR in the ~140 dB ballpark. Yet Figs. 15&16 and several passages in the text mention much higher values. So what is correct?
2) Fig. 36 says that the 30Vpp max frequency is around 10 kHz. However, the specs say it has 20 V/µs slew rate. At such slew rate, I would expect something like max 200 kHz at 30Vpp. E.g. the OPA2192 (similar amp) does show indeed 200kHz at 30Vpp at a slew rate of 20 V/µs. I need to hit at least 100 kHz at 30Vpp. Is this possible with the OPA2189 ? If not, why not ?
regards,
Part Number: TPA3221
Hello,
I'm developing a portable audio speaker and I want to use the TPA3221,but at this time, I can't make it work.
I designed a test board and this is what I noticed in my tests :
- Nothing on the outputs, little crackling when a speaker is connected
- When the reset is low, otw_clip and fault are off (5V by pull-up)
- When I put reset to high state, fault led goes on
- Current consumption never above 100mA
- The 5V internal LDO stays at around 4V with peaks to 4.5V but it never reaches 5V.
I tried to use an external supply (basic LM340T5) to power the VDD, AVDD and GVDD instead of the internal LDO, but nothing changed.
So, I decided to replace the TPA3221 IC. Here is the result :
- Nothing on outputs
- Fault LED always on, even if the reset is low
- Current consumption around 250mA (strange thing... )
This is my current schematic :
Do you think my board has damaged the TPA3221 ?
Inductors are SRN1060-100M from Bourns.
C9, C21, C4, C12, C17 and C24 are the same as on the EVM board (PHE426HB7100JR06 and EEU-FC1H102).
I can send you the schematic and the PCB in altium format if you prefer.
I have an other question about the filters behind the TPA3221. What are the filters formed by C5, C6, C13, C14, R4 and R6 for ? I only see them in the datasheet but nobody uses it.
Thank you in advance for you help and sorry for my english :-)
Best regards,
Bastian Cerf
Part Number: TLC393
TINA TI. How do I insert the second half of a dual comparator like the TLC393. The first time I insert the part it shows it as the first half (pins 1, 2,3 ,4 and 8). How do I insert the second half (pins 5, 6, and 7). Inserting the TLC393 will add a completely new part, which means that the device current will double because I now have two comparators instead of just one dual comparator.. I am using Tina Version 9.3.150.4 SF-TI.
Part Number: OPA2237
Dear, Support Team.
My customer checked the pin dimensions for mounting.
I have a question about the dimensions of the solder surface.
http://www.ti.com/jp/lit/ds/symlink/opa2237.pdf
I think that 0.041inch (1.04mm) of D0008A's DETAIL A TYPICAL lead length is short.
Best Regards,
Hiroaki Yuyama
Part Number: LM358
Dear team,
My customer wants to use LM358 with MSP430AFE253. The following is the circuit
After using TLC2272, the measured data jitter is very large, but the high-precision multimeter test follows the output but is very stable.
BR,
Susan
Part Number: PGA308
Hello,
Customer wants to extend Vout by 100mm to 300mm and connect to equipment. In that case, is a buffer amplifier required?
Best regards,
DDdoor
Part Number: INA200
Hello! Could you tell me please what means "3B" on item? Is that date code 2013+ or something else?
Part Number: THS4052
Hello guys,
One of my customers is considering using THS4052 for a voltage follower. They have the following question about THS4052.
Q. Is 20 ohm resistor placed between THS4052 output and CLOAD on Figure 45 in THS4052 datasheet needed for voltage follower configuration (G=1)?
Your reply would be appreciated.
Best regards,
Kazuya Nakai.