Part Number:INA125
Hello,
I'm using the INA125 with a load cell and it works good.
Now i have another sensor which using the bridge method - but a little bit different -- it is an industrial pressure sensor like in the below link:
I'm already using the INA125 and I want to use the same chip for this sensor. is the INA125 will work as it should with this kind of sensor?
Thank you very much.
Part Number:INA125
Hi to all!
I have a problem to acquire the output signal from the INA125P. My circuit is like to this (from forum.43oh.com/.../):
the only difference is that i have added a 0.1uF capacitor between S+ and S-. This work fine if I use it for the normal weighting operation, but work bad if i need to measure a thrust from a bldc motor with propeller.
In particular during an acquisition session i obtain this signal from adc:
this is very noisy and unuseful signal because this signal have much negative values, so i can't use it for my purpose.
However i have tryed to insert a RC filter and i obtained some improvement:
I obtained this signal using the original circuit above ( without the 0.1uF capacitor between S+ and S- ) and a RC circuit whit R = 4.7KOhm and C = 4.7uF. I have used this value because with other values i obtain however some negative values. However this signal is less usefull because i can't measure the full thrust generated of my motor and propeller. I understand that this is due from the RC filter that isn't fast, but i not know how to improve this signal using a different value of R and C without have a negative value.
My question is, how i can improve the circuit to obtain a better and usable signal for my purpose? I'm not an electrical engineering, so i have some problem to find a solution.
Hi,
I would like to amplify a Unipolar 0 - 4.096V to a Bipolar ±10V signal.
I tried filtering the amplifiers, but there is no option to choose input/ouput ranges. Can someone help me?
The signal is coming from a DAC 12-bit
Best regards,
Luc
Part Number:INA149
Hi,
The Difference amplifier INA149 in our circuit gets Input common mode voltage of 30V. During one particular testing, we found that the IC got damaged and we are trying to debug the issue. We are wondering about ESD protection diodes in the IC. Suppose the Input Voltage is up before the Power supply (+/-15V), will this cause damage to the IC. Page-13 of datasheet mentions that the current through ESD diode must be limited to 10mA. We have a 100 ohm resistor at the input pin. So when the input pin voltage reaches 30V & if the Power supply pin does not have any Voltage, Will the IC be damaged? The current through ESD diode will be 30mA in this case.
Regards,
Veerasamy
Part Number:TIDA-00912
Hello all,
I am a MSEE student at UCCS. I need to build a shunt-based current sensor that can handle up to 500 A and output an analog voltage, such that an Arduino could measure it and compute the current from the sensor for an electric vehicle application.
I have researched the products that may fit the bill and found that you currently have the TIDA-00912 reference design, which is close to what I need. It states that it can only handle up to 200 A though; why is this? Can I simply raise the shunt resistance to make the current across it lower and measure up to 500 A?
If it can only handle 200 A, what solution do you have that can handle more current?
Thank you,
Bobby
Part Number:LMP91000
Hi
I am trying to use 4 gas sensors with four LMP91000 and one ADS1148. The following are membrapor gas sensor specs.
| Gas Name | Range (ppm) | Output Signal nA/ppm |
| CO | 0-200 | 700 +/- 120 |
| NO2 | 0-500 | -370 +/- 70 |
| O3 | 0-100 | -650 +/- 150 |
| SO | 0-100 | 370 +/- 70 |
I am trying to use the LMP91000 with single ended ADC. Do you suggest differential ADC?
I am considering Delta Sigma ADC for this application. Is this correct?
Should I use 16 bit or 24 bit ADC?
What will be the best reference voltage to utilise the full ADC resolution of ADS1148?
Please also try to let me know the LMP91000 settings for the above gases.
Since I am also trying City sensors which have lower sensitivity and range, kindly explain the logic behind your suggestions.
Regards
Vijay
Part Number:INA125
Hello,
The max rated temp of this amplifier is 125 C.
Can this amplifier be used at 127 C? What would be the impact on reliability if the amplifier is used at 127C?
Thank you
Part Number:LT1013
Hello! ;)
I want to scale an analog voltage (-10 ... +10 V) to fit into the range of an ADC (0 ... 3.3 V). For this purpose I want to buffer the input voltage with a unit gain buffer and after that I either...
1.) ... use a resistive divider with an additional branch to a higher voltage level (see picture below), e.g. the upper OpAmp supply rail instead of 3.3 V, and buffer the output of the divider (ADCin) with a unity-gain buffer again, ...
2.) ... or I use a summing amplifier to interface the ADC, like in the picture below (the above-mentioned upper OpAmp supply rail would be used as v_p to bias the non-inverting input).
First of all: Which of the two approaches seems better to you? The input will be rather a low-frequency, DC-like signal. Maybe some step changes will occur. I want to supply all OpAmps with -15 V and +15 V.
A friend suggested to use the LT1013 as buffers. But I also found the OPA196 on the internet, which seems to have better specifications than the LT1013.
Do you know the input bandwidth of the LT1013? I cannot find anything about this in the LT1013 datasheet.
Which of those amplifiers would you suggest as unity-gain buffers and which as OpAmp for the above-mentioned summing amplifier?
Best regards!
Part Number:AMC1301
Hi all
Would you mind if we ask AMC1301?
We have basic question about floating voltage on the datasheet P1 Simplified Schematic.
The voltage VDD1 is supplied using Zener diode or TL431 between VDD1 pin and GND pin.
In case of no Load or no low-side gate operation, it seems that there is no current path from Zener diode's cathod to anode.
Is our recognition correct?
Kind regards
Hirotaka Matsumoto
Part Number:OPA4188
Hi,
I've designed an input signal conditioning circuit using OPA4188 as shown in the figure below:
The input signal is a sine wave with amplitude that ranges from 0 to 14 Vpp and frequency that ranges from 1.5 kHz to 10 kHz.
I simulated the circuit using LTSpice and it performed as expected. However, when I implemented the circuit and tested it, I found that it presents an output distortion, as shown in the figure below:
The figure above shows the results when the input frequency is 10 kHz. However, this distortion is present for frequencies as low as 3 kHz. For lower frequencies the circuit does not present this distortion. I've repeated this test on each of the OPA4188 channels, on different boards and on different OPA4188s. They all presented the same issue.
I've seen similar questions on the forum (like OPA4188: Strange sine distortion and OPA188: TI precision lab EVM OPA188 Output distortion ) but none of them reaches a conclusion.
Did anyone reach a conclusion on these other questions? What could be causing this distortion and how can I avoid it?
Regards,
Filipe
Part Number:OPA388
Hi,
I am considering making a signal amplifier for my piezoelectric nano-force sensor. The expected output from the sensor/input to the amplifier is within the range from couple micro-volts to hundreds of milli-volts. I want to amplify it into milli-volt to volt so that a normal data logger can handle the signal.
Since the output resolution is down to couple micro-volts, I think OPA388 is the right one to go, but I am not quite sure what kind of circuit design I should use. The signal is expected to be a bit noisy, but I am not so sure what kind of filter and desgin to use. Since I am new to this, I am not so familiar with all the technical issue. The company of the force sensor offers a pre-amplifier they designed but ask for 1000 USD, and I can't afford that. I don't expect such self-built amplifier could do exactly as the commercial one, but it could help me to get some preliminary data for application of funding.
Can someone help me on this? Thank you.
Part Number:LM231
Tool/software:TINA-TI or Spice Models
Hello,
I would like to find a Spice model for the lm231 or lm331 that is compatible with Multisim student edition 13. As a side question, would I have better results with Tina? I have seen adds for Tina in Everyday Practical Electronics magazine and I have seen references to Tina on the Texas Instrument website.
I would like to use either the lm231 or lm331 for analog telemetry of a remote seismometer. The idea of using a voltage to frequency converter on the transmitting end and a frequency to voltage converter on the receiving end seems to be the best choice for me. I have read the data sheet for the lm231/ lm331. But, I am not sure if this is the right solution for me.
Thank you,
Richard Phillips
Part Number:THS7373
Hi Team,
Could you please help review THS7373IPWR schematic?
(Please visit the site to view this file)
BR,
SHH
Part Number:INA333
Hello team,
My customer is willing to verify with TI whether if the supplied component (pic below) matches the following TI GPN: INI333AIDGKR
and if there is any documents that explain how to read the device marking/date code for INA333AIDGKR device.
appreciate your fast response due this case inhibits production line.
Thanks a lot and regards,
Shai Berman
Part Number:INA321
Hello,
I am working on the design of an ECG channel of instrumentation. I use the schematic from the page 14 of the following datasheet (http://www.ti.com/lit/gpn/ina321). I want to shield the probes's cables but I don't know if I have to connect the ground or the V_R (virtual ground). One more thing is the V- conncted to the ground and the V+ connected to the Vcc?
Best regard,
Vincent STRAGIER
