Part Number:LOG112
Hi,
We have been using log112 for our sensor signal conditioning for the past three years. Recently smoking was observed in a few boards and the issue is the 10uF tantalum decoupling capacitor used. What will be a better alternative - electrolytic or MLCC? The datasheet mentions a tantalum capacitor but considering the fire hazard, which is better?
Thanks & Regards,
Murali
Part Number:OPA4277
hello.
I'm using the operational opa2477. I am using it within a circuit to adjust the gain of a signal. The amplifier gets very hot, so I remove all the components that connect it with the other parts of the circuit. In conclusion the amplifier is only connected to the + -12V supply, and its respective decoupling capacitors, but the amplifier still reaches temperatures of 60 ° C and above. Is this temperature normal for the amplifier? I have changed the amplifier twice, and the result remains the same.
the funny thing is that the amplifier works, and fulfills its task, but I do not know if I let the circuit work with this temperature, in a short time, the circuit no longer works.
Part Number:BOOSTXL-TLV8544PIR
Hi I have CC2538 evolution module with SmartRF06 board and I have BOOSTXL-TLV8544PIR.
I am trying to access the PIR sensor from CC2538. I found some info on the link 
But I not found the Power supply pin for PIR, I tried by giving the power supplies of 3.3 and 5 to the power pins I was getting random varying voltages from all of PIR Low THR OUT, High THR OUT, PIR Signal OUT and 1STAG OUT. I am in confusion how to read value from this sensor, I not get what is 1STAG OUT. Can any one please help to access the PIR from MCu other than CC2650 Launchpad.
Thank you.
Part Number:INA128
Dear Employees / Engineers,
I currently building an Instrumentation amplifier application for measuring High voltages over mediums in the medical research to study their behavior.
What I am using is a INA128 for measuring the voltage from 110V by means of a Voltage divider and a Offset +Filter (LT1028) into an External ADC ADS8885 18Bit.
The second OPA is a INA148 which is a difference amplifier for current measurement.
The question is:
How to design or calculate the right Zener diodes/voltage Suppressors for my applications.
I am using +-15V for the Opamps, and I would like to protect the INA148,INA128 and ADS8885 inputs.
Are BAT46WJ SOT323 sufficient or are the even Transguard from AVX better?
Part Number:opa333
Tool/software:TINA-TI or Spice Models
Hi
I am giving an EEG signal as an input to my circuit. A general EEG signal frequency ranges from 0-30Hz and I need to eliminate other frequencies.
I have added noise to my signal and given it as an input to IN333 instrumentation amplifier.
1. I have added a 2nd orderLow-PassSallen Key filter to it with passband region till 40 Hz and stopband region from150 Hz.
2. I have connected a High pass filter with stopband from 0.01Hz and passband from 0.5Hz.
So I need to eliminate the frequency of signal ranges from 40 to 150 Hz. I am planning to add a notch filter.
I am confused How to design a single op-amp twin T notch filter which attenuates signals between 40 to 150 Hz.
I am planning to use Tina workbench for designing this stop band filter, what are the parameters I need to consider
centre frequency (fo) ----------? is it sqrt(40*150)
-3db bandwidth(Asb) ------------?
stop band bandwidth (BW3b)---------------?
Part Number:INA333
Thank you for the forum. I want to make a strain gauge interface. I seem to find oodles of different devices to do this. For my use I already have a micro with a ADC having a good 16 bit, DIFFERENTIAL INPUT capability with plenty of speed on tap. I just need a little GAIN. 100 maybe.
Looking at front end "IN" amplifiers like the INA333 and hoping to find one that has a differential output, single supply with simple OCM setting capabilities seems missing... Either I'm missing something literally or conceptually. Conceptually meaning -- there must be a good reason that this is not more prevalent as a BRIDGE BUFFER - ADC DRIVER
Full bridge ( 4 strain gauges 350 ohms each )
3 or 5 volt excitation.
Expecting about 20mV full scale from bridge
The mid bridge voltage being exactly excitation/2
I'd like to have at least 12 of my bits not wiggling around. (I'm in a fairly low noise environment. )
I see some differential input and output amplifiers
But don't seem to make the STRAIN GAUGE application connection with any of them.
Their claim to fame seems to be " these drive differential input ADC's great!"
Am I off base?
Appreciate any helpful responses.
Thanks
Part Number:OPA2192
I have some question about OPA2192.
In the situation the power of OPA 2192 is OFF.
How to prevent damage to the OPA 2192 when applying an external voltage to the output pin (pin 1) of the OPA 2192?
For data input pins on the data sheet, it is stated that the input current should be ±10 mA or less.
However, I could not find a description about output pins.
If the current of the output pin is suppressed to ± 10 mA or less,(Insert a resistor between output pin and external power supply)
Will OPA 2192 receive no damage?
Kind regards,
Taka
The following description is about the part OPA376AIDCKR.
I want to know why there are some difference about the parts.Is it a different batch or a product update？Please help me seek the reason.
Wait for your news.
Thanks.
Part Number:AMC1301
Hello support team,
I have some questions about AMC1301.
Regarding Figure 45 and 46 on page 17 of Data Sheet (Rev. D), I'd like to know the specification of the rise and fall time of the input signal VINP - VINN.
Questions
1. Since "tr" and "tf" of the output signals VOUTP and VOUTN are 2.0 μs respectively, I guess that the rise and fall time of VINP - VINN is 2.0 μs or less.
Is my understanding correct?
2. In the case the rise and fall time of VINP - VINN is less than 2.0 μs, I think "tr" and "tf" of VOUTP and VOUTN will be always 2.0 μs.
Is my understanding correct?
3. Therefore I presume that the rising and falling conditions of VINP - VINN in Figure 45 and Figure 46 are less than 2.0 μs.
Is my understanding correct?
Best regards,
M. Tachibana
Part Number:TLV8801
Hello,
One of my customer senior engineers posed a concern that the feedback resistor (R10) on the Op Amp below has too high a value (10M) and could make the feedback loop unstable. Do you see any issue with this implementation?
Regards,
David
Part Number:PGA309
We use the PGA309 along with a modified version of the Excel PGA309 Calibration spreadsheet to calculate the calibration parameters. We save the configuration parameters calculated using the PGA309 Calibration spreadsheet and download to the PGA309 using the PGA309_DK board interface program.
We would like to add the communications to and from the PGA309 into the Excel spreadsheet. Do you have any code or library for VBA that would help us to add communication to the PGA309 to our Excel based spreadsheet?
Part Number:AMC1301-Q1
dears
the amc1301 SCH is shown below，PACK+ voltage about 500V，i found that the output signal is not equal to the theoretical calculation value，error is bigger。(R247+R248)=(R242+R243);how to set the R12 and R15，delet them is OK？
note that：PACK- is battery cathode，ISO_GND1 is amc1301 GND，There is no connection between them。
if I set PACK- connect to ISO_GND1 ，i Worry about the gnd noise influence the input signal。
Part Number:OPA350
I use an OPA350 to buffer the ADC's unbuffered voltage output (VCOM). The ADC's VCOM pin provides a voltage output equal to AVDD/2 to set the output common-mode level of the analog input drivers - in this case, 8 differential amplifiers VOCM.
The OPA350's output, which is now the buffered ADC VCOM (+2.5V), powers the output common-mode pins (VOCM) of 8 differential amplifiers that sets the DC output voltage. Each differential amplifier's VOCM input contains one 0.1uF, one 1uF, and one 10uF decoupling capacitor to filter high-frequency noise. Per the differential amplifier's datasheet, a 0.1-μF or 1-μF capacitor is generally adequate so I may be overdoing it with the 10uF decoupling cap.
My questions are:
1) Is the total output load capacitance too much for the OPA350 to drive? Could it cause oscillation/instability on the output?
2) Should I add an isolation resistor such as a 100 ohm resistor in series with the output of the OPA350 to help reduce instability/oscillation?
3) Should I add a 100 ohm resistor in series between the output of the ADC's VCOM pin and the input of the OPA350 to reduce parasitic noises? The recommended VCOM output on the ADC does not have a series resistor and only recommends using a 0.1uF bypass capacitor to reduce noise pickup.
Thank you
Part Number:OPA1622
When analyzing shutdown mode, op amps have an effect on the input, causing serious distortion of the input.
Part Number:INA333
Tool/software:TINA-TI or Spice Models
hello
I am unable to run AC transfer characteristics to the attached circuit. but able to simulate transient analysis, showing an error operating point not found.
please suggest me how to avoid this error.
I am attaching the circuit. (Please visit the site to view this file)
