Part Number: OPA354
Hi All,
I see in the OPA386 datasheet page 32, the attenuation property.
Does have OPA354 attenuation property for stable working? Please consider inverting and non-inverting circuit.
Must to care special design procedure to stabilize the attenuator?
Regards, Ras
Part Number: OPA2374
This is the external current sense circuit from the BOOSTXL-DRV8301. How important is the buffer for the 1.5V coming off of the voltage divider? Mainly I would like to see if a single channel op amp could be used rather than the dual channel.
Part Number: TLE2142
I am having trouble with the model TI provides " TLE2141.LIB"
I found the forum help question:
https://e2e.ti.com/support/amplifiers/f/14/p/565673/2074413#2074413
"Upon further investigation, it appears that some standard PSpice parameters for temperature control are not supported by Altium, including T_ABS."
and, so... I rolled up my sleeves and attempted to modify the "subckt" for TLE2141 in a similar way the OPA171 model was modified in the above "answer".
Model download: OPA171_mod.cir
I don't get the T_ABS errors with my new file, but that model still causes the Altium spice simulator to hang.
I even tried using the exact OPA171 model "" in my circuit. This method is not exactly correct , but it does complete (however, it takes a really long time).
I suspect I did not modify it correctly.
so, my question is:
Can you create a TLE2141 spice model that does not have T_ABS parameters?
bonus points for a model the executes faster, for Transient, AC, and DC analysis only (noise issues are not something for which we simulate )
Part Number: TLV171-Q1
Hi sir,
Please kindly suggest commercial and industrial grade of TLV171QDBVRQ1.
Thanks a lot!
BR,
Sean Liao
Part Number: OPA2171
Hi support,
I am using OPA2171 in a constant current source circuit. I've added some protection resistor at the input to protect against ±15V from the output. Here's the snapshot for part of the circuit:
As shown in the diagram, when I measured these voltages and currents, I noticed that the non-inverting input current is not the same as the inverting input. In fact, the inverting pin input current is about double of the non-inverting pin. Why is that so?
From the block diagram in the datasheet, the two inputs should have a similar structure so this is an unexpected result:
Part Number: OPA547
Hi,
Can I use it as a power source in inverting mode where it will be control by DAC. As I know that if we use in inverting mode then oscillation are less as compare to non-inverting mode.
If so can you please suggest some application circuit, because in datasheet the configuration given is in non-inverting mode.
Thanks and Regards
Gajendra
Part Number: OPA124
Dear TI expert,
we are using a OPA124UA chip, but the chip will soon stop production. Please help to recommend a pin to pin product, thank you
Part Number: LMH32401
Hi TI support team,
at the moment we are planning a new design for optical detections systems. The new part LMH32401 seems to be very interesting for our apltication but there is one thing that is not clear to us. In the datasheet you find the follwing description:
Does that mean using PD with opposite biasing where the cathode has a high positve voltage and Anode ist connected to the input of TIA will not work or is there a way to make it work? After checking quite a lot of APD power supplies I could not find any which directly brings out a negative APD- voltage for biasing. They will bring out a postive voltage with reference to GND. Maybe I did not have the right keywords.
So questions is: What circuit do you recommend for optimal biasing?
Any hint, suggest or help is very welcomed.
Thanks in advance.
Part Number: AMC1311-Q1
Dear team,
We would like to know the transfer function relation between Vin to Vp and Vn of the isolation amplifier (AMC1311BDWVQ1)
The equation for finding the Vp and Vn based on Vin in linear region.
Regards,
Mohana Krishnan M
(mohanakrishnan.muthu@hcl.com)
Hi,
My motor drive customer is revisiting ACDC power supply that are 20 years old right now.
They are looking for:
The last 2 functions will be part of a safety chain so they should have good reliability.
We can choose the power supply for these functions between 3.3V and 5V.
Any ideas?
Many Thanks,
Antonio
Part Number: INA139
Dear colleague,
Our customer is planning to do a design in the brick power module for preventing current backflow. The previous solution is a diode, but as the power rate increases, a diode has more power dissipation. So we want to use this solution as the below picture. Why we need this function is because of tester special feature.
In normal mode, the tester provides DC voltage to the brick power module, max DC input is 200V.
In special mode, tester will act like short(K1 close), but at this moment, the energy storage capacitor has 200V voltage, if we don't prevent current backflow, it will happen short circuit and fail the test.
This may be a brick power industry standard, so if we could provide a solution, it will be significative.
So could you please reply to our 2 questions?
1. Whether the function is feasible?
2. How to calculate the detection speed? Customers want it as fast as possible.
Best Regards,
Rock Su
Part Number: UAF42
Hello,
I have designed a band pass filter using part UAF42AP at f = 500 HZ (See my circuit schematics at 1.tiff). The filter is working well and neutralizing unwanted signals at other frequencies. However, while using the spectrum analyzer to evaluate its performance, I noticed that a signal (although weak) is generated by the IC at its center frequency. For example, you can notice this when inputs such as 1 Volts sin 50 Hz (see 3.tiff) or 1 Volts sin 5 KHz (see 2.tiff) were used. In other words, a self generated signal is added/mixed to the signal I am trying to collect at the center frequency, which is problematic. I also found an application data describing how to use UAF42AP to make a sine generator (see sbfa002.pdf). Therefore, I am suspecting that for some reason, maybe me not connecting some of the pins right, this chip is partially performing as an oscillator/sine generator. In addition, the self generated signal at the center frequency is in direct relation with the gain of the filter.
Please advise if any experts can help me resolve this problem.
On a separate, any suggestions on how to reduce the noise when using UAF42AP would be appreciated as well.
P.S. I am using breadboard for this test. The green signal is the output and yellow is the input.
Best Regards,
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Part Number: PGA206
What would be the HBM ESD rating for this device?
Part Number: THS4082
What would be the HBM ESD rating for this device?
Part Number: TLE2141A
What would be the ESD HBM rating for the TLE4141AID (also the TLE2141MDREP)
Part Number: TIPD193
The TIPD193 BOM <http://www.ti.com/lit/df/tidrf13/tidrf13.pdf>
..dated in the year 2015 contains "78.7k" in the value column for R3/item #11.
That R3 value is incorrect in that column.
The description column lists the correct "78.7" value.
When using the 78.7k Resistor, at room temperature (108 ohms RTD) the input value at the INA326 will be -3.8 volts, which is outside the absolute maximum values.
Where to report this resistor value error/mistake/typo to get the TIPD193 BOM fault free?
Part Number: XTR105
Can I use XTR105 and transmit 0 -5k ohms resistance to 4-20 mA
Part Number: INA186
The spec sheet for the INA186 refers to the part as capacitively coupled. This to me would mean that it was not suitable for measuring DC signals especially if they were steady for a long time. This part appears otherwise to be suitable for measuring DC current through a shunt. Is is suitable for DC? If so what is meant by capacitively coupled?
Part Number: INA210
Team,
After a review of an older designs our team realized that we dont connect the NC pin to ground as is specified in the datasheet. Do you know if this pin actually connects to anything internally or is it just specified to be connected to ground so it isn’t floating?
