Tool/software:
Hello,
I would like to know if I can use this circuit in quasi as audio amplifier application for a frequency band of 8-40kHz into an inductive load of 4 Ohm. The source of the audio signal is a swept sine wave.
Thank you
Tool/software:
We use two INA238s on one PCB to monitor two galvanically isolated power supplies. The INA238 are operated with 5V, have 20kΩ pull-ups on the I2C lines (previously also tested with 4k7Ω) and are monitoring 24V power supply outputs. The 5V are generated from the 24V using a linear regulator and are therefore only available when the 24V power supply units are activated.
If we configure the INA238 before the power supplies have fully started up to 24V, we will not receive any I2C-ACK from them when we go through the configuration (probably an undervoltage protection). However, the readout of values (current, voltage, power and temperature) afterwards takes place with apparently correctly set parameters.
However, if we wait 300ms (approximately the time the power supplies need to start up to 24V), commands from the I2C-ACK are confirmed and we can read out the values as before. However, the values read out are unchangeable and always remain the same and are the same regardless of being read out again. This is even though the MODE field in the ADC_CONFIG register being set to ‘Continuous bus voltage, shuntvolyage and temperature’.
Is this a known problem?
Tool/software:
Hi Team
We have secured this part and realized differences in lead frames for DC24+ and DC22+
Can we confirm if such difference in lead frame is deemed normal and does not affect the fit, form and function of the parts? Thanks in advance!
DC24+ |  |
DC2249 |  |
Tool/software:
Hello,
I am currently dealing with the XTR305 chip and I am trying to find a good balance between the values of the Cc, C4 and Rc (designators from DS,Figure 40). The challenge is achieving a max. phase delay of -3 degrees at 300Hz for both I and V mode, while varying the Rload from 50 to 500 in I-mode. As of now by using the TINA simulations it seems that the values that I found either amplify the signal at higher frequencies for small load resistance in I mode or achieve a phase delay higher than 3 degrees at 300Hz in V mode. Is there a way to achieve a filtering behaviour while keeping the phase delay within the required limits? Gladly I can provide more details if needed. Thank you in advance.
Tool/software:
Hello Team,
Can you please advise me the weight of AMC23C10DWV?
One of our customers need this before they place the order. Thank you.
Best Regards,
Usman Niazi
QFD9A49
Tool/software:
Hi,
Is the crosstalk between both JFETs known? I'm planning to use them for their great matching and performance but am a little afraid that using one package for two channels may have a crosstalk issue?
Thanks and Regards.
Tool/software:
Good day. I have a huge problem, I have a CD Wadia 16 and unfortunately it is seriously damaged, the BUF634P were burnt, I know they have been withdrawn from production. I have a question, do you have old stock somewhere in your warehouse or what to replace them with? I need 6 pieces. Best regards and thank you. Piotr.
Tool/software:
Dear E2E Team,
I'm trying to get a 4-20mA receiver circuit with analog output in the 0-3V3 range and I found a suggestion from 4 years ago, in a reply by Luis Chioye to the Ambimat Team.
It essentially comes down to the circuit shown in Luis's final reply and I found it very well suitable for what I want, but I have some questions:
- I intend to work with input voltage between 10 and 28V, what would be the recommended TVS?
- For better precision, wouldn't it be recommended to use resistors with an error better than 1% (or better than 0.1%)?If so, what would these resistors be?
- What error would be introduced with variations in the 3V3 power supply of the TLV333 amplifier?
Thank you very much for any answer!
Luiz
Luis's schematic is this:
Tool/software:
I'm designing astable multivibrator which generates a clock of 0 to 5V at frequency 800Hz, The circuit is as shown below:
Component selection:
| Selection of feedback resistor at non inverting terminal | ||
| For symeterical waveform: feedback ratio, β =0.462 | ||
| β | 0.462 | |
| R1 | 100 | KΩ |
| R2 | 85.87360595 | KΩ |
| R2 selected | 86 | KΩ |
RC circuit:
| Frequency | 800 | Hz |
| C | 1.00E-07 | F |
| C | 100.00 | nF |
| Rf | 6.25E+03 | Ω |
| Rf | 6.25 | KΩ |
Waveform is as displayed below:
I want a design suggestion to generate 0 to 5V signal at frequency of 800Hz.
Tool/software:
Hello,
I'm using the THS4521 op-amp to sense current in my circuit. When I apply an isolated current supply (without powering the rest of the PCB), the differential output from the op-amp is correctly read by the ADCs of the LaunchXL-TMS320F28379D, and I get accurate current measurements in the microcontroller.
However, when I turn on the main power supply of my PCB, the ADC readings from the microcontroller become inconsistent and random. I am using the ADCs in differential mode, and the output of the op-amp (measured with a multimeter) still appears correct, but the microcontroller does not register proper values.
I_sense and DGND)Could you please help me identify why the ADC readings become unstable when the PCB power is turned on, and suggest potential solutions to resolve this?
Thank you!
Tool/software:
Hi, I'm using the INA740B digital power monitor for a university project. I have it soldered to a test board and a 3.3V LED is being powered through it. My power supply says the LED at 3.3V is drawing 0.014A and consuming 0.044W. However, the results I'm getting through the power monitor are 2.825V, 0.0072A, and 0.0202W. For programming the power monitor, I used the C code generated through TI SysConfig and have it running on a Raspberry Pi Pico. The code is in the zip file attachment. The power monitor connects via I2C just fine and some data is being read, although it does not seem to be accurate. My thinking is it could be 1 of 4 things:
Any advice or suggestions with this issue are greatly appreciated.
Tool/software:
Hello team,
I am using INA240A1-Q1 in my design to sense the 10A current , Please validate my calculation below
Vout= Iload*Rsense*Gain
=10A*15mohm*20
=3V
If my load current is 10A through sense resistor,Opamp output will be 3V 20V/V gain - is my assumption is correct ?
Tool/software:
Hi Team,
My customer is using THVD8000 and below are the achieved ranges -
Test case 1: on CAT6 cable which works for 1.2 Km
Test case 2: on Signalling cable (6.2 ohm for 100 meters) which works for 300 meters only
In order to send the data for long distance they want to use THS6222 Line Driver. In Design and Development page of Texas Instruments it is used for Solar Power Line communication.
But, in their application they need to transfer data but, not power and it is not multi node communication. (i.e; node =2)
Please Suggest the suitable Hardware design for our Application.
If there is any other solution please suggest.
Tool/software:
Hello Team,
We're using INA238 to measure the bus voltage.To implement code, i got some driver from ASC-STUDIO-INA238 and ported the INA238_getVBUS_V part alone to Simplelink . Since the hardware is yet to be received, i just wanted to test if the calculations in the code is fine. But i'm not sure what could be the hex data for the VBUS voltage?
Can you please give me some examples for the same?
Thanks in advance.
Tool/software:
Hi, I'm testing my design with the BUF802, but I'm having a 'deep' in 2ghz.
I did some experiments, and removing the DC blocking capacitor, I don't see the deep anymore. (I did several modifications, removing the LF and middle frequency path, and there is no change on the deep frequency or amplitude)
Could be related with the package/inductance/esr of the capacitor? Do you have a PN to recommend? I'm using the CC0603JRNPO9BN331 (330 pF ±5% 50V Ceramic Capacitor C0G) from Yageo.
I tried also to change the capacitor value to 180pF/220pF/1nF with X7R capacitors I have, and the result is always the same.
Could be related with the package 0603 and not the capacitor itself?
(front end below will be tunned to remove the peak, but I'm having the same deep even when I select resistors that have a very flat response)
Removing DC blocking capacitor:
Example of the same deep even when changing the front end resistors.
This is the layout we are testing:
Tool/software:
Hi,
I am currently using Spice for TI to simulate the TL331 component, but I have noticed discrepancies between the simulation results and the behavior of the actual hardware. To ensure I use the tool correctly in the future, I would like to confirm the following points:
I would greatly appreciate your clarification regarding these points to ensure I can trust the simulation results for my design.
Thanks,
Conor
Tool/software:
Good morning,
I have a design that uses a +/-15V dual voltage supply and I would like to use 2 TLV6700 for monitoring UV/OV of this dual supply.
For the positive one (+15V) I have no questions.
But for the negative one (-15V), can I use a schematic similar to that shown in SLVA600 for TPS3700:
-VSS = -15V in my case.
Thanks,
Marina-
Tool/software:
Hi Team
my customer side try to use ADC_CONFIG BIT 2-0 function to check the average value of power.
but they find if they have any setting like 7h,4h,3h.
the power value will return to 0.
they currently set VSHCT(bit 8-6) to 5h
MODE to Fh(Continuous)
2h to 0x00fa. and other register is default
do we have any other setting need to check or set up?
BRs
Brian
Tool/software:
The above is an implementation for low-side current sensing based on INA296A3IDDFR in my project. Whilst validating the circuit, I found that the output at I_PV_SNS_OU with respect to GND is quite noisy. Here is a waveform captured when the current flowing through sense resistor R1 is about 50mA
Observing this, I proceeded to measure 0V6_REF and 3V3_ANALOG, both with respect to GND and did not observe the same noise pattern
Other things we have tried include:
1. Replacing R53 with 360Ω (to decouple the 1nF capacitive load from the amplifier based on INA296A: Floating noise much higher than spec - Amplifiers forum - Amplifiers - TI E2E support forums)
2. Replacing C156 with a 270pF capacitor (since 1nF is exactly equal to the maximum tolerable capacitance for this component)
3. Removing R53 altogether and measuring the output at I_PV_SNS_OU (No capacitive load on the output)
None of these actions had a noticeable effect on the output waveform and we continued to observe the same noise pattern and I am wondering what other actions I could take to reduce this noise?
Would appreciate any recommendations.
Tool/software:
Hello!
We have a mature design containing the TRF37D73.
Recently we realised that on some boards current, consumed by the TRF37D73, is extremely high - up to 350mA.
The amplifier at this state is operational, but the PWDN input does not control the amplifier behaviour.
Supply voltage and input signal strength (power) are within the datasheet specifications.
Was such issue reported previously?
What could cause it?