Hi Vera,
New diagram shows Vcm = 5V, needs to be able to measure bidirectional current, including 0A. Correct? What is the supply voltage needed and output needed?
Customer can take a look at INA210 or INA199 family of directional current shunt…
Knowing how close an amplifier’s output voltage (V OUT ) can swing to its positive and negative power rails is extremely important for design because the larger the swing, the more meaningful measurements you can acquire from the output of the amplifier…
Hi Adrian,
As promised I run some tests. Since you haven't mentioned the common mode voltages required for the circuit I decided to evaluate a few different devices and play safe on my recommendation as to cover all your requirements.
I recommend…
The SEPIC design is tempting, although I am very space constrained and adding a second inductor would be difficult. I also need to handle a relatively high input voltage (20V) and LED current (1A), which eliminates the LM3410 and leaves relatively few…
Hi,
Thank you for answering the questions.
Yes the INA193 should be good regarding your requirements.
For your application you can also consider the INA199 or INA210 which has more gain possibilities.
You can make your choice between those…
sudhanthiradasan R,
If you're only concerned with current measurements and not power measurements, you can operate this device in a low-side configuration with the load between the supply and sense resistor, much like this:
I am not familiar with…
Dear Mickey,
Unfortunately the INA216 is not recommended for low side applications. If you examine the datasheet, you will see that the part sources its power off of the input pins, and therefore must be mounted on the high side by the supply such…
Hello Stephen,
I have been looking this over with my team and we have comments below.
The delay is not due to a negative common mode voltage, but a combination of the offset voltage (Vos) and IOUT saturation. The common mode voltage should be relatively…
