Hello Jason,
I am unaware of any such stand-alone calculators or spreadsheets at this time. The closest thing I can think of is the error calculation I performed for TIPD156. The calculations were done with Mathcad and the source file is available in…
Hello Awal,
You could look at the INA210. You will want a device with the lowest input offset (Vos) as possible. You can also refer to one of these designs as well for more ideas.
TIPD135 - 10uA-100mA, 0.05% Error, High-Side Current Sensing Solution…
Kuramochi-san, Have you solved your issue? The INA226-Q1 (10uA Ib typical) and INA220-Q1 (20uA Ib typical) would be your best options to satisfy your original requirements. You can additionally find low current measurement (10uA - 100mA) designs with…
Hey again,
I don't see a problem using the switch with our parts; although, I am not sure if the TPS22959 will be able to withstand the 55A current peaks though. As for the rest of the circuit it seems you have gone with one of the options I proposed…
Hello Scott,
It is likely that the customer can simply use an op amp (I assume that's what you mean by "OP"), but first I would like some additional information:
1) What power supplies are available for the sensing circuitry?
2) Does the customer…
Hello Hari,
The maximum full-scale linear output ratio I calculated was a quick calculation of Vout_max/Vout_min = 5V/0.05V = 100. This is actually not techincally accurate, but just for comparison. Any voltage output amplifier will have a linear region…
Kai,
Using a current shunt monitor will be good for measuring large currents like 8A. When currents get smaller, like under 100mA, the errors can be significant. This is because large resistors are needed to measure small currents, and small resistors…
Hello Paolo,
Detecting such a wide range of current is definitely challenging, especially given 1MHz BW. The options we typically see are either changing the gain of the device (e.g. using a PGA as in TIPD135) or switching in different sense resistors…
Hello Nikos,
1. The datasheet was written over 40 years ago...I don't know if it was actually built...the original authors are long gone. But it is a common circuit.
2. Assumptions were probably a large current .The LM324 is not considered a "precision…
